A combined ecological filter

Abstract

The invention relates to the field of sewage treatment, and discloses a combined ecological filter tank, comprising a filter tank module, a water transmission module, a gas transmission module and a monitoring feedback control module; the filter tank module comprises a plurality of filter tanks, and filter tanks are filled with filter grading layers; the water transmission module comprises a main water transmission pipeline and a branch water transmission pipeline; the gas transmission module comprises a main gas transmission pipeline and a branch gas transmission pipeline, and the branch gas transmission pipeline comprises a control pipe and an annular pipe; the annular pipe is connected with a purge rod for purging; a transmission rod is arranged in the control pipe, and the transmission rod is connected with a float and a baffle, and the position of the baffle is adjusted by the height of the float, thereby adjusting the connection state between the annular pipe and the control pipe; the monitoring feedback control module comprises a control component, a humidity sensor and a flow sensor, and the control component is used to control the water inlet state and the gas transmission state of each filter tank; the invention realizes aeration and drying of the filter grading layer and flushing of the biofilm between the filter materials through the purge rod, thereby solving the blockage problem.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, in particular to a combined ecological filter tank. Background Art

[0002] In the traditional sewage treatment scheme, after being regulated by the biological filler in the regulating tank, the sewage will be introduced into the filter tank for filtration and absorption treatment, and finally go to the clean water tank and other subsequent treatment equipment. The sewage is continuously and evenly sprayed on the filter surface of the filter tank through the water distribution device. Under the action of gravity, the sewage falls in the form of dripping and diffuses and drips around through capillary action. Part of the sewage is adsorbed on the surface of the filter material and becomes a thin film of attached water layer, and the other part infiltrates through the filter material in the form of a thin film to become a flowing water layer. The filter material intercepts the organic matter in the sewage, and the microorganisms reproduce rapidly, absorb the intercepted organic matter, absorb the soluble substances and colloidal substances in the sewage, and rely on the action of biological film to complete the filtration, absorption and degradation of organic matter. Finally, the sewage is discharged from the filter tank through the drainage system to the next treatment process.

[0003] However, there are still many problems in the above traditional solutions. Most existing filter tanks use continuous water supply, and the filter media are always kept moist. The organic matter between the filter media is easy to grow wildly, thereby clogging the gaps between the filter media, resulting in reduced water output and reduced filter tank treatment efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to avoid clogging of the gaps between filter materials. In order to solve the above technical problem, the present invention provides a combined ecological filter, including a filter module, a water transmission module, a gas transmission module and a monitoring feedback control module;

[0005] The filter tank module comprises a plurality of assembled combined filter tanks, wherein the filter tank is divided into a filter chamber and a water collection chamber, the filter chamber is filled with a filter grading layer, and the water collection chamber is provided with a drainage port connected to a drainage system;

[0006] The water delivery module comprises a main water delivery pipeline and a branch water delivery pipeline, wherein a plurality of branch water delivery pipelines are provided corresponding to the filter tank, the branch water delivery pipeline is connected to the main water delivery pipeline, and the outlet of the branch water delivery pipeline is provided directly above the corresponding filter tank;

[0007] The gas transmission module comprises a main gas transmission pipeline and a branch gas transmission pipeline which are connected to each other. The input end of the main gas transmission pipeline is connected to a booster gas transmission device. A plurality of branch gas transmission pipelines are provided and are correspondingly arranged in the filter tank. The branch gas transmission pipeline comprises a control pipe and at least one annular pipe. The control pipe is used to control the connection state between the annular pipe and the main gas transmission pipeline.

[0008] The inner side of the annular tube is connected to a plurality of purge rods extending into the filter grading layer, the interior of the purge rod is provided with an air guide cavity connected to the annular tube, and the rod wall is provided with a plurality of air outlet holes; a transmission rod is provided in the control tube, the bottom end of the transmission rod is connected to a floating block provided in the water collecting cavity, a baffle is connected to the side of the transmission rod away from the floating block, the transmission rod adjusts the position of the baffle by the height of the floating block, and then adjusts the connection state between the annular tube and the control tube;

[0009] The monitoring feedback control module includes a control component and a plurality of humidity detection components and water outlet detection components correspondingly arranged in the filter tank. The humidity detection component includes a humidity sensor corresponding to the annular pipe, and the water outlet detection component includes a flow sensor arranged in the water collecting chamber. The control component is used to control the water inlet state and gas supply state of each filter tank.

[0010] Preferably, the filter grading layer comprises a primary filter layer and a secondary filter layer, the filter material particle size of the primary filter layer is smaller than that of the secondary filter layer, the primary filter layer is arranged in the middle of the filter cavity, and the secondary filter layer is arranged around the primary filter layer;

[0011] A water distribution tray is provided on the top of the filter grading layer; a plurality of diversion grooves are evenly distributed on the inner circumference of the water distribution tray, and diversion holes are provided at the bottom of the diversion grooves. The water distribution tray is used to guide and divert the sewage output by the branch water pipeline in the filter tank.

[0012] Preferably, a plurality of filter pipes extending upward are arranged on the top of the main water supply pipeline, the side of the filter pipe is connected with the branch water supply pipeline, one end of the filter pipe is connected with the main water supply pipeline, and the other end is fixedly connected with a detachable filter device;

[0013] The filtering device comprises a cover plate threadedly connected to the filtering pipe, an annular filter screen is arranged at one end of the cover plate facing the main water supply pipeline, the annular filter screen is fitted with the inner wall of the filtering pipe, and a sealing gasket is arranged between the cover plate and the top of the filtering pipe.

[0014] Preferably, one end of the main water supply pipeline away from its water inlet is connected to a vertically arranged collecting pipe, and a stop valve is arranged at the bottom of the collecting pipe.

[0015] Preferably, the annular tube is connected to six purge rods; the axes of the purge rods are all oriented toward the central axis of the annular tube.

[0016] Preferably, the air outlet holes are symmetrically arranged in two rows along the axis of the purge rod, and the openings of the air outlet holes are arranged below the purge rod and face obliquely downward.

[0017] Preferably, the control tube includes a first cavity and a second cavity separated by a partition plate, a movable block is arranged in the second cavity, the bottom surface of the movable block is connected to the floating block via a connecting rod; the top surface of the movable block is connected to the transmission rod which passes through the partition plate and is arranged in the first cavity;

[0018] The transmission rod is threadedly connected with a collar, the collar is fixedly connected with a baffle, the inner wall of the control tube is provided with an annular groove corresponding to the baffle, and the baffle fits with the bottom wall of the annular groove to close the air inlet of the annular tube.

[0019] Preferably, a conductive sheet is provided on the inner wall of the second cavity, a conductive ring is provided on the side wall of the movable block corresponding to the conductive sheet, the conductive ring is electrically connected to a conductive column provided in the connecting rod, and one end of the conductive column passes through the bottom surface of the floating block.

[0020] Preferably, the branch gas pipeline includes a first annular tube, a second annular tube and a third annular tube evenly distributed from top to bottom, the purge rods on the two adjacent annular tubes are staggered on the horizontal plane, three conductive plates are evenly distributed in the vertical direction in the second cavity, and the baffles connected by the transmission rod are respectively provided with a first baffle and a second baffle corresponding to the second annular tube and the third annular tube.

[0021] Preferably, the arc length of the second baffle is greater than the arc length of the first baffle.

[0022] Preferably, a plurality of vertically arranged aeration tubes are evenly distributed on the circumference of the first annular tube, the aeration tubes are connected to the first annular tube, and the aeration tubes are provided with air outlet holes.

[0023] Preferably, the monitoring feedback control module further includes a plurality of water inlet valves, the control assembly is electrically connected to the water inlet valves, the humidity sensor, the flow sensor and the conductive sheet, and the water inlet valves are correspondingly arranged at the water inlets of the branch water delivery pipelines;

[0024] The control component is used to receive the humidity information of the humidity sensor to control the opening and closing status of the water inlet valves on different branch water pipelines; the control component is used to receive the flow information of the flow sensor, the humidity information of the humidity sensor and the conduction information of the conductive sheet to control the working state of the boosting equipment.

[0025] Compared with the prior art, the combined ecological filter provided in the embodiment of the present invention has the following beneficial effects:

[0026] In the present invention, the water inlet state and ventilation state in each filter tank are switched by monitoring the feedback control module, so that each filter tank alternately performs sewage treatment work. While ensuring the sewage treatment efficiency, the filter grading layer in the filter tank alternates between wet and dry states, inhibiting the growth of biofilms, thereby reducing the occurrence of blockage problems; further, when the blockage problem is more serious, by increasing the air pressure and airflow, a faster airflow can be ejected from the purge rod, which can accelerate the drying of the filter material while also flushing the biofilm between the filter materials to solve the blockage problem; in addition, the water level change in the water collection chamber during the filtration process can be monitored by the floating block. When the water level in the water collection chamber is normal, it indicates that there is no blockage problem. At this time, the baffle closes the air inlet of the annular tube to prevent sewage from entering the control tube. When the water level is lower than the threshold, it indicates that there is a blockage problem. At this time, the floating block drives the transmission rod to move downward and then drives the baffle to rotate, and the annular tube is connected to the control tube, thereby achieving the purge of the filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a stereoscopic view of the present invention;

[0028] Figure 2 The present invention Figure 1 Schematic diagram of the local structure at the middle filter tank;

[0029] Figure 3 It is a structural schematic diagram of the branch gas transmission pipeline of the present invention;

[0030] Figure 4 It is a cross-sectional structural view of the filter tank of the present invention;

[0031] Figure 5 is a cross-sectional structural view of the branch gas transmission pipeline of the present invention;

[0032] Figure 6 The present invention Figure 5 Schematic diagram of the local structure of the active block at A in the middle;

[0033] Figure 7 It is a partial view of the filtering pipeline of the present invention;

[0034] Figure 8 It is a cross-sectional structural view of the purge rod of the present invention.

[0035] In the figure: 1, filter tank; 11, filter chamber; 12, water collection chamber; 13, primary filter layer; 14, secondary filter layer; 15, drain outlet; 16, water distribution tray; 161, diversion trough;

[0036] 2. Main water pipeline; 21. Filter pipeline; 22. Cover plate; 23. Filter screen; 24. Sealing gasket; 25. Collection pipeline; 251. Stop valve; 3. Branch water pipeline;

[0037] 4. Main gas transmission pipeline; 41. Boosting gas transmission equipment;

[0038] 5. Branch gas pipeline; 51. Annular tube; 511. Purge rod; 512. Air outlet; 513. Air guide cavity; 514. First annular tube; 5141. Aeration tube; 515. Second annular tube; 516. Third annular tube; 52. Control tube; 521. Transmission rod; 522. Float; 523. Baffle; 5232. First baffle; 5233. Second baffle; 5234. Third baffle; 524. First cavity; 5241. Annular groove; 525. Second cavity; 5251. First conductive sheet; 5252. Second conductive sheet; 5253. Third conductive sheet; 526. Movable block; 5261. Conductive ring; 5262. Conductive column;

[0039] 6. Humidity sensor; 7. Flow sensor; 8. Water inlet valve. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] like Figures 1 to 8 As shown, a preferred embodiment of the present invention provides a combined ecological filter, which includes a filter module, a water delivery module, a gas delivery module and a monitoring feedback control module;

[0042] The filter tank module comprises a plurality of assembled combined filter tanks 1, wherein the filter tank 1 is divided into a filter chamber 11 and a water collection chamber 12, the filter chamber 11 is filled with a filter grading layer, and the water collection chamber 12 is provided with a drainage port 15 connected to a drainage system;

[0043] The water delivery module includes a main water delivery pipeline 2 and a branch water delivery pipeline 3. A plurality of branch water delivery pipelines are provided corresponding to the filter tank 1. The branch water delivery pipeline 3 is connected to the main water delivery pipeline 2. The outlet of the branch water delivery pipeline 3 is provided directly above the corresponding filter tank 1.

[0044] The gas transmission module includes a main gas transmission pipeline 4 and a branch gas transmission pipeline 5 that are connected to each other. The input end of the main gas transmission pipeline 4 is connected to a booster gas transmission device 41. A plurality of branch gas transmission pipelines 5 are provided, and are correspondingly arranged in the filter tank 1. The branch gas transmission pipeline 5 includes a control pipe 52 and at least one annular pipe 51. The control pipe 52 is used to control the connection state between the annular pipe 51 and the main gas transmission pipeline 4.

[0045] The inner side of the annular tube 51 is connected with a plurality of purge rods 511 extending to the filter grading layer, the interior of the purge rods 511 is provided with an air guide cavity 513 communicating with the annular tube 51, and the rod wall is provided with a plurality of air outlet holes 512; a transmission rod 521 is provided in the control tube 52, the bottom end of the transmission rod 521 is connected with a floating block 522 arranged in the water collecting chamber 12, and a baffle 523 is drivingly connected to the side of the transmission rod 521 away from the floating block 522, and the transmission rod 521 adjusts the position of the baffle 523 by the height of the floating block 522, thereby adjusting the communication state between the annular tube 51 and the control tube 52;

[0046] The monitoring feedback control module includes a control component and a plurality of humidity detection components and water outlet detection components correspondingly arranged in the filter tank 1. The humidity detection component includes a humidity sensor 6 arranged corresponding to the annular tube 51, and the water outlet detection component includes a flow sensor 7 arranged in the water collecting chamber 12. The control component is used to control the water inlet state and gas supply state of each filter tank 1.

[0047] Specifically, in the traditional sewage filtration scheme, the sewage is continuously discharged into the filter tank 1. After being filtered by the filter filler, the sewage drips downward into the water collection chamber 12 and is finally guided to the next treatment process. During the sewage treatment process, the microorganisms between the filter materials will absorb and treat the impurities in the sewage. However, as the microorganisms grow, the microorganisms will gradually fill and block the gaps between the filter materials, hindering the sewage from continuing to flow downward, causing the sewage treatment efficiency to become lower and lower. In the present embodiment, the clogging problem of the filter material is alleviated in two aspects. On the one hand, a plurality of combined filter tanks 1 are arranged, and sewage is introduced into different filter tanks 1 through branch water pipelines 3. By adjusting the water inlet time and drying time of each filter tank 1, while ensuring the sewage treatment efficiency, the filter material can have a dry-wet alternation process, thereby inhibiting the growth rate of microorganisms, and further achieving the effect of inhibiting and mitigating the occurrence of the clogging problem. Furthermore, the filtration state of each filter tank 1 can be monitored by a humidity sensor 6 and a flow sensor 7. When the humidity is too high and the water flow rate is too low during the working period, it can be determined that the filter tank 1 is blocked. When it is determined that the filter tank 1 is seriously blocked, the control component can control to reduce the water inlet time of the branch water pipeline 3 in the filter tank 1, increase the air exposure time of the branch air pipeline 5, and increase the flow rate and temperature of the aeration air, thereby accelerating the drying speed of the filter material in the filter tank 1 and further inhibiting the growth of microorganisms. In addition, since the purge rod 511 is deeply set in the filter grading layer, the gas input from the branch gas pipeline 5 can also flush the biofilm between the gaps of the filter material to initially alleviate the blockage problem. When the blockage problem is more serious, it is bound to cause the amount of sewage flowing into the water collection chamber 12 to decrease, and the floating block 522 drops in height under the action of gravity, driving the transmission rod 521 to move downward, and then driving the baffle 523 to move to open the air inlet of the annular tube 51, so as to facilitate the purge gas to enter the purge rod 511, purge the filter material and cooperate with the running water to take away the purged biofilm, thereby solving the blockage problem. When there is no blockage problem, the water level of the floating block 522 is normal, and the baffle 523 can close the air inlet of the annular tube 51, thereby preventing sewage from entering the control tube 52. When the filter tank 1 is in a ventilated and dry state, there is no water inflow, and the floating block 522 is at the lowest point. At this time, the annular tube 51 is connected to the main gas pipeline 4, so as to facilitate the drying and aeration of the filter material in the filter tank 1. During the working stage, the ventilation state of each filter tank 1 can be automatically adjusted according to the blockage condition of each filter tank 1, eliminating the trouble of controlling the closing and opening of the gas circuit by the valve circuit. The control component can control the flow rate and other parameters of the gas in the gas circuit according to the data of the flow sensor 7 and the humidity sensor 6, thereby adjusting the aeration intensity and the purge intensity.

[0048] In some embodiments, the filter grading layer includes a primary filter layer 13 and a secondary filter layer 14, the filter material particle size of the primary filter layer 13 is smaller than the filter material particle size of the secondary filter layer 14, the primary filter layer 13 is arranged in the middle of the filter cavity 11, and the secondary filter layer 14 is arranged around the primary filter layer 13;

[0049] A water distribution tray 16 is provided on the top of the filter grading layer; a plurality of diversion grooves 161 are evenly distributed on the inner circumference of the water distribution tray 16, and diversion holes are provided at the bottom of the diversion grooves 161. The water distribution tray 16 is used to guide and divert the sewage output by the branch water pipeline 3 in the filter tank 1.

[0050] Specifically, in this embodiment, the particle sizes of the filter materials in the inner and outer layers of the filter grading layer are different. The particle size of the filter material of the inner circle primary filter layer 13 is small and the surface area is larger. The flow rate of sewage is slow, and more biofilms can be attached, so the sewage treatment effect is higher. The inner filter material is always in a humid environment as a whole, the bacterial colony is richer, the food chain is longer, and the pollutants are decomposed more thoroughly; while the particle size of the filter material of the outer circle secondary filter layer 14 is larger, the natural ventilation effect is better, and the dry-wet alternation is more obvious. In the actual sewage filtration process, the sewage will diffuse from the inner layer to the outer layer, and the rich bacterial population in the inner layer can better treat the sewage, and the treated sewage continues to flow to the outer layer. The outer filter layer 14 is a kind of secondary filter layer 14, and the outer filter layer 14 is a kind of secondary filter layer 13. The outer filter layer 14 is a kind of secondary filter layer 14, and the outer filter layer 14 is a kind of secondary filter layer 14. The outer filter layer 14 is a kind of secondary filter layer 13 ...4, and the outer filter layer 14 is a kind of secondary filter layer 14. The outer filter layer 14 is a kind of secondary filter layer 14, and the outer filter layer 14 is a kind of secondary filter layer 14. The outer filter layer 14 is a kind of secondary filter layer 14, and the outer filter layer 14 is a kind of secondary filter layer 14. The inner filter layer 14 is a kind of secondary filter layer 14, and the inner filter layer 14 is a kind of secondary filter layer 14. The inner filter layer 14 is a kind of secondary filter layer 14, and the inner filter layer 14 is a kind of secondary filter layer 14. The inner filter layer 14 is a kind of secondary filter layer 14, and the inner filter layer 14 is a kind of The arrangement of the water distribution tray 16 can guide and disperse the water output from the branch water supply pipeline 3 to the filter tank 1, so that the sewage can enter the primary filter layer for treatment more comprehensively, thereby improving the diffusion and treatment efficiency of the sewage. Moreover, each time the water enters, since the particle sizes of the inner and outer filter materials are different, the amount of biological film is also different, and therefore the flow speed of the water in the outer and inner layers is also different, at this time, low-speed air can be continuously and stably introduced into the secondary filter layer 14 through the branch air supply pipeline 5 to increase the oxygen content between the filter materials, thereby increasing the biological film and improving Sewage treatment efficiency. Of course, this structure needs to adjust the position of the baffle 523 or the state of the air intake. For example, if the power of the air intake equipment remains unchanged, the installation position of the baffle 523 is adjusted so that under normal water level, the baffle 523 blocks half or less of the air inlet of the annular tube 51, thereby controlling the amount of gas entering the annular tube 51, thereby reducing the amount and flow rate of gas ejected from the air outlet 512. While ensuring that other blocked filter tanks 1 have sufficient air pressure for purging, it can also meet the aeration and oxygenation needs of the normal filter tank 1 during sewage treatment with low-speed air.

[0051] In some embodiments, a plurality of filter pipes 21 extending upward are provided on the top of the main water supply pipeline 2, and a branch water supply pipeline 3 is provided on the side of the filter pipe 21, one end of the filter pipe 21 is connected to the main water supply pipeline 2, and the other end is fixedly connected to a detachable filter device;

[0052] The filtering device includes a cover plate 22 threadedly connected to the filtering pipe 21. An annular filter screen 23 is provided at one end of the cover plate 22 facing the main water supply pipeline 2. The annular filter screen 23 fits the inner wall of the filtering pipe 21. A sealing gasket 24 is provided between the cover plate 22 and the top of the filtering pipe 21.

[0053] Specifically, in the traditional technical solution, due to the different treatment solutions of the previous process, there are often a large number of debris particles with larger particle sizes in the sewage input into the main water pipeline 2. After these particles enter the branch water pipeline 3, they are easy to block the branch water pipeline 3 and affect the discharge of sewage. In this embodiment, an additional filter pipe 21 is provided. Under the action of pressure, the sewage carries the granular impurities upward and impacts the cover plate 22. After some granular impurities with heavier weight are impacted by the water flow and impact the cover plate 22, they will fall down under the action of gravity and are not easy to enter the branch water pipeline 3 directly from the side with the water flow, thereby reducing the probability of granular impurities entering the branch water pipeline 3 and causing blockage. Although another part of the impurity particles are carried upward by the sewage, they are not directly impacted by the annular filter 23, but impact the cover plate 22. These particles have less impact on the annular filter 23, and are not easy to get stuck in the filter holes of the annular filter 23 or pass through the annular filter 23 under the action of a large impact force, thereby further improving the filtering effect of the annular filter 23 and reducing the occurrence of the problem of the branch water pipe being blocked. In addition, after a period of use, the cover plate 22 can also be disassembled, and the annular filter 23 can be cleaned for reuse.

[0054] Furthermore, one end of the main water supply pipeline 2 away from its water inlet is connected to a vertically arranged collecting pipeline 25, and a stop valve 251 is arranged at the bottom of the collecting pipeline 25. The main water supply pipeline 2 is placed horizontally, while the collecting pipeline 25 is placed vertically. The sewage flows in the main water supply pipeline 2 to the end, and the impurity particles in the sewage enter the collecting pipeline 25 under the influence of the water flow and accumulate in the collecting pipeline 25. When the impurity particles accumulate to a certain extent, the stop valve 251 can be opened to release all the impurity particles and clean them up.

[0055] In some embodiments, the annular tube 51 is connected to six purge rods 511; the axes of the purge rods 511 are all oriented toward the central axis of the annular tube 51. Specifically, the number of purge rods 511 can be set to be larger according to the needs, and six are preferred here, which can basically meet the purge requirements of the annular filter material, and the purge rods 511 are horizontally arranged toward the central axis of the annular tube 51 to make the purge of the filter material more uniform. In some other embodiments, the purge rods 511 can also be arranged obliquely downward to better purge the filter material at the bottom of the inner part.

[0056] In some embodiments, the air outlet holes 512 are symmetrically arranged in two rows along the axis of the purge rod 511, and the openings of the air outlet holes 512 are arranged below the purge rod 511 and face obliquely downward. Specifically, the air outlet holes 512 are arranged in two rows and are inclined to the axis on both sides of the purge rod 511, which can expand the scope of the purge and thus better solve the clogging problem. The air outlet holes 512 are arranged below the purge rod 511, on the one hand to better prevent sewage from entering the air guide cavity 513, and on the other hand to guide the air flow to purge downward, because the deep below the filter material is more prone to clogging.

[0057] In some embodiments, the control tube 52 includes a first cavity 524 and a second cavity 525 separated by a partition plate. A movable block 526 is disposed in the second cavity 525. The bottom surface of the movable block 526 is connected to a floating block 522 via a connecting rod. The top surface of the movable block 526 is connected to a transmission rod 521 that passes through the partition plate and is disposed in the first cavity 524.

[0058] The transmission rod 521 is threadedly connected with a collar, and the collar is fixedly connected with a baffle 523. The inner wall of the control tube 52 is provided with an annular groove 5241 corresponding to the baffle 523. The baffle 523 fits with the bottom wall of the annular groove 5241 to close the air inlet of the annular tube 51.

[0059] Specifically, the height of the float 522 varies with the water level. The height position of the normal water level is set and the position of the baffle 523 is adjusted accordingly, so that the baffle 523 can block the air inlet of the annular tube 51. When the water inlet is stable, but the float 522 does not reach the preset height threshold, it indicates that the filter tank 1 has a blockage problem. At this time, the height of the transmission rod 521 is also lower than the normal height, and the baffle 523 can no longer completely cover the air inlet of the annular tube 51. The gas in the main gas pipeline 4 can enter the annular tube 51 through the control pipe 52 and be ejected from the air outlet 512, thereby achieving the purge of the filter material. As the filter material is no longer blocked, the water output is normal, the water in the water collecting chamber 12 returns to the stable water level, and the transmission rod 521 is pushed upward by the float 522, the ring rotates and drives the baffle 523 to rotate, thereby covering the air inlet of the annular tube 51. The more serious the blockage problem is and the lower the water level is, the larger the opening of the air guide cavity 513 is, and more gas can be introduced. Combined with the increase in the power of the booster gas transmission equipment 41, the filter material can be purged well.

[0060] In some embodiments, a conductive sheet is provided on the inner wall of the second cavity 525 , and a conductive ring 5261 is provided on the side wall of the movable block 526 corresponding to the conductive sheet. The conductive ring 5261 is electrically connected to a conductive column 5262 provided in the connecting rod, and one end of the conductive column 5262 passes through the bottom surface of the floating block 522 .

[0061] Specifically, when the filter tank 1 is in the sewage treatment state and the water level is lower than the normal threshold, in addition to the baffle 523 moving to no longer completely cover the air inlet of the annular tube 51, the conductive ring 5261 on the movable block 526 will also contact and conduct with the conductive sheet, and conduct with the water in the water collecting chamber 12. At this time, the control component can determine that the water level in the water collecting chamber 12 is lower than the normal threshold, and can cooperate to increase the power of the boosting gas transmission equipment 41 to input more and faster air into the gas pipeline, thereby enhancing the purging effect.

[0062] In some embodiments, the branch gas pipeline 5 includes a first annular tube 514, a second annular tube 515 and a third annular tube 516 evenly distributed from top to bottom, the purge rods 511 on the two adjacent annular tubes 51 are staggered on the horizontal plane, and three conductive plates are evenly distributed in the vertical direction in the second cavity 525. The baffle 523 connected by the transmission rod 521 corresponds to the first annular tube 514, the second annular tube 515 and the third annular tube 516, and the first baffle 5232, the second baffle 5233 and the second baffle 5233 are respectively provided.

[0063] Specifically, in this embodiment, three annular tubes 51 are provided, corresponding to different depth ranges of filter materials. In a specific embodiment, the position of the first baffle 5232 is controlled so that the first baffle 5232 partially blocks the air inlet of the first annular tube 514, thereby meeting the aeration and oxygenation requirements of the filter tank 1 during the sewage treatment process and improving the sewage treatment efficiency. After the water inlet is stable, the booster gas transmission device 41 can be opened to introduce gas into the gas path for aeration and purging. When a lighter blockage occurs, the water level does not reach the first threshold, the height of the floating block 522 decreases, and the first conductive sheet 5251 is connected to the conductive ring 5261 on the movable block 526. At this time, the air inlet of the annular tube 51 corresponding to the first baffle 5232 is fully opened, and the power of the booster gas transmission device 41 is increased to achieve preliminary purging of the filter material. The first baffles 5232 in other filter tanks 1 still partially block the air inlet of the corresponding annular tube 51 to meet the aeration requirements. When the clogging problem is moderate, the water level further drops. At this time, the second conductive sheet 5252 is connected to the conductive ring 5261, and the control component further increases the power of the boosting gas transmission equipment 41. At this time, the air inlet of the annular tube 51 corresponding to the second baffle 5233 has also been fully opened, and the corresponding purge rod 511 can purge the middle part of the filter material, further solving the clogging problem. When the clogging problem is serious, the water level further drops, the third conductive sheet 5253 is connected to the conductive ring 5261, and the control component further strengthens the power of the boosting gas transmission equipment 41. At this time, the air inlets on the upper, middle and lower three annular tubes 51 are all opened, and the filter material can be purged in all directions, thereby better solving the clogging problem. Of course, in some other embodiments, when the filter tank 1 is treating sewage, the first baffle 5232 completely blocks the air inlet of the annular tube 51. In this case, the aeration of the filter material is carried out during the ventilation and drying stage of the filter tank 1. At this time, the power of the boosting gas transmission equipment 41 can be controlled to be reduced.

[0064] In addition, the staggered arrangement of the upper and lower adjacent purge rods 511 can increase the range of the purge of the filter material, thereby better and more comprehensively dealing with the problem of filter material clogging.

[0065] Furthermore, the arc length of the second baffle 5233 is greater than the arc length of the first baffle 5232. Specifically, the different arc lengths of different baffles 523 and the different setting positions are to match the conduction conditions of the air inlets of different annular tubes 51, so that when the first baffle 5232 completely deviates from the corresponding air inlet, the second baffle 5233 and the third baffle 5234 can well cover the respective corresponding air inlets, when the second baffle 5233 completely deviates from the corresponding air inlet, the third baffle 5234 can well cover the respective corresponding air inlets, and when the third baffle 5234 completely deviates from the corresponding air inlet, the first baffle 5232 will not cover the corresponding air inlet.

[0066] Furthermore, a plurality of vertically arranged aeration pipes 5141 are evenly distributed around the circumference of the first annular pipe 514, and the aeration pipes 5141 are connected to the first annular pipe 514, and the aeration pipes 5141 are provided with air outlet holes 512. The arrangement of the aeration pipes 5141 increases the range of aeration, so that when the filter material is aerated, there are more air intake points and the aeration is more comprehensive, thereby accelerating the efficiency of ventilation and drying and the efficiency of aeration and oxygenation.

[0067] In some embodiments, the monitoring feedback control module further includes a plurality of water inlet valves 8, the control assembly is electrically connected to the water inlet valves 8, the humidity sensor 6, the flow sensor 7 and the conductive sheet, and the water inlet valves 8 are correspondingly arranged at the water inlet of the branch water delivery pipeline 3;

[0068] The control component is used to receive humidity information from the humidity sensor 6 to control the opening and closing status of the water inlet valve 8 on different branch water pipelines 3; the control component is used to receive flow information from the flow sensor 7, humidity information from the humidity sensor 6 and conduction information of the conductive sheet to control the working state of the boosting equipment.

[0069] Specifically, in a specific embodiment, the control component controls the opening and closing of multiple water inlet valves 8 in sequence, so that each filter 1 is intermittently distributed with water, ensuring that the filter 1 is in the stage of stopping water distribution and ventilation and drying in each time period, thereby ensuring the sewage treatment efficiency while inhibiting the growth of biofilm in each filter 1 and reducing the risk of clogging. In a further embodiment, the humidity sensor 6 will continue to monitor the dry state in the filter 1. When the humidity of the filter 1 is still higher than the threshold after the conventional low-speed air exposure ventilation and drying, it indicates that there may be too much biofilm in the filter 1, which may cause clogging. At this time, the air pressure of the gas introduced into the annular tube 51 can be increased, thereby improving the purging effect, so as to solve the problem of filter material clogging caused by too much biofilm. In addition, when the flow sensor 7 detects that the total water output of the filter 1 is low during the water distribution stage, the control component can also control the increase of the airflow in the annular tube 51 during the ventilation and drying stage, thereby increasing the purging effect to solve the problem of clogging.

[0070] In summary, the embodiment of the present invention provides a combined ecological filter 1, which can control the switching of the water inlet state and the ventilation state in each filter 1 through a monitoring feedback control module, so that each filter 1 alternately performs sewage treatment work, and while ensuring the sewage treatment efficiency, the filter grading layer in the filter 1 is alternately in a wet and dry state, which inhibits the growth of biofilm and reduces the occurrence of clogging problems; further, when the clogging problem is more serious, by increasing the air pressure and airflow, a faster airflow can be ejected from the purge rod 511, which accelerates the drying of the filter material. At the same time, it can also flush the biofilm between the filter materials to solve the blockage problem; in addition, the floating block 522 can be used to monitor the water level changes in the water collecting chamber 12 during the filtration process. When the water level in the water collecting chamber 12 is normal, it indicates that there is no blockage problem. At this time, the baffle 523 closes the air inlet of the annular tube 51 to prevent sewage from entering the control pipe. When the water level is lower than the threshold, it indicates that there is a blockage problem. At this time, the floating block 522 drives the transmission rod 521 to move downward and then drives the baffle 523 to rotate, and the annular tube 51 is connected to the control pipe, thereby realizing the blowing of the filter material.

[0071] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A combined ecological filter, characterized in that: Including filter module, water transmission module, gas transmission module and monitoring feedback control module; The filter tank module comprises a plurality of assembled combined filter tanks, wherein the filter tank is divided into a filter chamber and a water collection chamber, the filter chamber is filled with a filter grading layer, and the water collection chamber is provided with a drainage port connected to a drainage system; The water delivery module includes a main water delivery pipeline and a branch water delivery pipeline, a plurality of branch water delivery pipelines are provided, and the branch water delivery pipelines correspond to the filter tanks one by one, the branch water delivery pipelines are connected to the main water delivery pipeline, and the water outlets of the branch water delivery pipelines are arranged directly above the corresponding filter tanks; The gas transmission module comprises a main gas transmission pipeline and a branch gas transmission pipeline which are connected to each other. The input end of the main gas transmission pipeline is connected to a booster gas transmission device. A plurality of branch gas transmission pipelines are provided and are correspondingly arranged in the filter tank. The branch gas transmission pipeline comprises a control pipe and at least one annular pipe. The control pipe is used to control the connection state between the annular pipe and the main gas transmission pipeline. The inner side of the annular tube is connected to a plurality of purge rods extending to the filter grading layer, the interior of the purge rod is provided with an air guide cavity connected to the annular tube, and the rod wall is provided with a plurality of air outlet holes; a transmission rod is provided in the control tube, the bottom end of the transmission rod is connected to a floating block provided in the water collecting cavity, a baffle is connected to the side of the transmission rod away from the floating block, the transmission rod adjusts the position of the baffle through the height of the floating block, and then adjusts the connection state between the annular tube and the control tube; The monitoring feedback control module includes a control component and a plurality of humidity detection components and water outlet detection components correspondingly arranged in the filter tank, the humidity detection component includes a humidity sensor correspondingly arranged in the annular pipe, the water outlet detection component includes a flow sensor arranged in the water collecting chamber, and the control component is used to control the water inlet state and the air transmission state of each filter tank, so that each filter tank alternately performs sewage treatment work, and the filter grading layer in the filter tank alternates between wet and dry states; The control tube includes a first cavity and a second cavity separated by a partition plate, a movable block is arranged in the second cavity, the bottom surface of the movable block is connected to the floating block through a connecting rod; the top surface of the movable block is connected to the transmission rod which passes through the partition plate and is arranged in the first cavity; The transmission rod is threadedly connected with a collar, the collar is fixedly connected with a baffle, the inner wall of the control tube is provided with an annular groove corresponding to the baffle, and the baffle is fitted with the bottom wall of the annular groove to close the air inlet of the annular tube; A conductive sheet is provided on the inner wall of the second cavity, a conductive ring is provided on the side wall of the movable block at a position corresponding to the conductive sheet, a conductive column is provided in the connecting rod, the conductive column is electrically connected to the conductive ring, and one end of the conductive column passes through the bottom surface of the floating block; The monitoring feedback control module also includes a plurality of water inlet valves, the control assembly is electrically connected to the water inlet valves, the humidity sensor, the flow sensor and the conductive sheet, and the water inlet valves are correspondingly arranged at the water inlets of the branch water delivery pipelines; The control component is used to receive the humidity information of the humidity sensor to control the opening and closing status of the water inlet valves on different branch water pipelines; the control component is used to receive the flow information of the flow sensor, the humidity information of the humidity sensor and the conduction information of the conductive sheet to control the working state of the boosting gas transmission equipment.

2. The combined ecological filter according to claim 1, characterized in that: The filter grading layer comprises a primary filter layer and a secondary filter layer, the filter material particle size of the primary filter layer is smaller than that of the secondary filter layer, the primary filter layer is arranged in the middle of the filter cavity, and the secondary filter layer is arranged around the primary filter layer; A water distribution tray is provided on the top of the filter grading layer; a plurality of diversion grooves are evenly distributed along the circumference of the water distribution tray, and diversion holes are provided at the bottom of the diversion grooves. The water distribution tray is used to guide and divert the sewage output by the branch water pipeline in the filter tank.

3. The combined ecological filter according to claim 1, characterized in that: A plurality of filter pipes extending upward are arranged on the top of the main water supply pipeline, and the side of the filter pipe is connected to the branch water supply pipeline. One end of the filter pipe is connected to the main water supply pipeline, and the other end is fixedly connected to a detachable filter device; The filtering device comprises a cover plate threadedly connected to the filtering pipe, an annular filter screen is arranged at one end of the cover plate facing the main water supply pipeline, the annular filter screen is fitted with the inner wall of the filtering pipe, and a sealing gasket is arranged between the cover plate and the top of the filtering pipe.

4. The combined ecological filter according to claim 3, characterized in that: One end of the main water supply pipeline away from its water inlet is connected to a vertically arranged collecting pipeline, and a stop valve is arranged at the bottom of the collecting pipeline.

5. The combined ecological filter according to claim 1, characterized in that: The annular tube is connected to six purge rods; the axes of the purge rods are all oriented toward the central axis of the annular tube.

6. The combined ecological filter according to claim 5, characterized in that: The air outlet holes are symmetrically arranged in two rows along the axis of the purge rod, and the openings of the air outlet holes are arranged below the purge rod and face obliquely downward.

7. The combined ecological filter according to claim 1, characterized in that: The branch gas pipeline includes a first annular tube, a second annular tube and a third annular tube evenly distributed from top to bottom, the purge rods on the two upper and lower adjacent annular tubes are staggered on the horizontal plane, three conductive plates are evenly distributed in the vertical direction in the second cavity, and the transmission rod is respectively provided with a first baffle, a second baffle and a third baffle at the positions corresponding to the first annular tube, the second annular tube and the third annular tube.

8. The combined ecological filter according to claim 7, characterized in that: The arc length of the second baffle is greater than the arc length of the first baffle.

9. The combined ecological filter according to claim 7, characterized in that: The first annular tube is evenly distributed with a plurality of vertically arranged aeration tubes along the circumference, the aeration tubes are communicated with the first annular tube, and the aeration tubes are provided with air outlet holes.

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