Denitrification filter tank assembly

Abstract

The denitrification filter tank assembly comprises a plurality of denitrification filter tanks arranged side by side, each denitrification filter tank comprises a tank body and denitrification filler, a water inlet and a water outlet are formed in the two opposite sides of the tank body respectively, the denitrification filter tanks are arranged in the tank body, sewage to be treated can flow into the tank body through the water inlet, and the denitrification filler is arranged in the tank body; the denitrification filler is used for carrying out denitrification treatment on the flowing sewage, and the height of the water inlet of each denitrification filter tank is adjustable, so that the height of the water inlet of each denitrification filter tank is kept flush, and the balance of the water level and the inflow water quantity in the tank bodies of the side-by-side denitrification filter tanks can be ensured; and the problems that the water inflow of each denitrification filter tank is unbalanced (for example, water enters the denitrification filter tank with a relatively low water inlet and the water inflow is large, and no water enters the denitrification filter tank with a relatively high water inlet) due to inconsistent heights of the water inlets of the denitrification filter tanks are solved.

Description

Technical Field

[0001] This application relates to the technical field of water treatment, and particularly to a denitrification filter assembly. Background Art

[0002] A denitrification filter is a biological filter with a denitrification and nitrogen removal function. In a denitrification filter, a filler is usually provided as a carrier for the biofilm. With the denitrification effect of relevant microorganisms, nitrate nitrogen in the sewage is reduced to nitrogen gas and discharged, thereby achieving nitrogen removal from the sewage.

[0003] Currently, for projects with a large sewage treatment volume, multiple denitrification filters are usually arranged side by side. However, since the water inflow of each denitrification filter is not easy to control, the water inflows of the individual denitrification filters are often uneven. The denitrification filter with a lower water inlet usually fills with water first and has a large water inflow, while the denitrification filter with a higher water inlet may even have no water inflow, resulting in inconsistent effluent effects of the individual denitrification filters. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a denitrification filter assembly that can ensure the balance of the water level and the water inflow in the pool body of each side-by-side denitrification filter.

[0005] A denitrification filter assembly includes: a plurality of denitrification filters arranged side by side. Each denitrification filter includes a pool body and denitrification filler. An inlet and an outlet are respectively arranged on opposite sides of the pool body. The denitrification filter filler is arranged in the pool body. The sewage to be treated can flow into the pool body through the inlet and then flow out of the pool body through the outlet. The denitrification filler is used for denitrifying the sewage flowing through. The height of the inlet of each denitrification filter is adjustable so that the heights of the inlets of the individual denitrification filters are kept flush.

[0006] In one embodiment, the water inlet includes a water inlet pipe, the water inlet pipe includes a horizontally connected horizontal water inlet pipe section and a vertically connected vertical water inlet pipe section. The water outlet end of the horizontal water inlet pipe section extends into the pool body through the side of the pool body away from the water outlet. The water inlet end of the horizontal water inlet pipe section is located outside the pool body, and the vertical water inlet pipe section is located outside the pool body. The water inlet end of the vertical water inlet pipe section is above the water outlet end of the vertical water inlet pipe section, and the water outlet end of the vertical water inlet pipe section is detachably connected to the water inlet end of the horizontal water inlet pipe section. The sewage to be treated can flow into the vertical water inlet pipe section through the water inlet port of the vertical water inlet pipe section in sequence, then flow into the horizontal water inlet pipe section through the water outlet port of the vertical water inlet pipe section and the water inlet port of the horizontal water inlet pipe section in sequence, and then flow into the pool body from the water outlet port of the horizontal water inlet pipe section. The length of the vertical water inlet pipe section is adjustable so that the height of the water inlet port of the vertical water inlet pipe section is adjustable.

[0007] In one embodiment, the horizontal water inlet pipe section and the vertical water inlet pipe section are connected by an arc transition.

[0008] In one embodiment, a water inlet grid is provided at the water inlet.

[0009] In one embodiment, a mixing area and a packing area are provided in the pool body and are connected and communicated. The mixing area and the packing area are arranged in sequence along the length direction or the width direction of the pool body. The water inlet is provided in the mixing area, and the water outlet is provided in the packing area. The sewage to be treated flows in from the water inlet and flows out of the pool body from the water outlet after passing through the mixing area and the packing area in sequence. The denitrification packing is arranged in the packing area.

[0010] In one embodiment, the denitrification filter further includes an anti-backwashing aeration pipe, which is arranged in the packing area and is located at the bottom of the denitrification packing. The anti-backwashing aeration pipe is used for performing an aeration anti-backwashing operation on the denitrification packing.

[0011] In one embodiment, the anti-backwashing aeration pipe includes a vertically connected vertical aeration pipe section and a horizontally connected horizontal aeration pipe section. The vertical aeration pipe section is arranged in the mixing area. One end of the horizontal aeration pipe section is connected to the vertical aeration pipe section, and the other end of the horizontal aeration pipe section extends into the packing area. The horizontal aeration pipe section is located at the bottom of the denitrification packing, and a plurality of aeration holes are arranged at intervals on the horizontal aeration pipe section.

[0012] In one embodiment, the denitrification filter further includes an air distribution member disposed in the packing area and sleeved outside the backwashing aeration pipe, and the air distribution member is used to increase the aeration volume and aeration intensity of the backwashing aeration pipe.

[0013] In one embodiment, the denitrification filter further includes a water level detector disposed in the preparation area, and the water level detector is used to detect the water level height in the preparation area.

[0014] In one embodiment, each of the denitrification filters is connected as a whole, and the connection parts of the pool bodies of two adjacent denitrification filters share each other.

[0015] In the above denitrification filter assembly, denitrification packing is provided in the pool body of each denitrification filter. When the sewage to be treated flows through the denitrification packing, the denitrification packing can perform denitrification treatment on the flowing sewage to convert nitrate nitrogen in the sewage into nitrogen gas, thereby realizing the denitrification treatment of the sewage. In this solution, since the height of the water inlet of each denitrification filter is adjustable, the operator can flexibly adjust the height of the water inlet of each denitrification filter according to the water inlet demand, so that the height of the water inlet of each denitrification filter is kept level. In this way, when the sewage to be treated flows to the denitrification filter assembly, the water level and the water inflow volume in the pool bodies of each side-by-side denitrification filter can be ensured to be balanced, and the problem of uneven water inflow volume in each denitrification filter (for example, the denitrification filter with a lower water inlet first receives water and has a large water inflow volume, while the denitrification filter with a higher water inlet has no water inlet) caused by inconsistent heights of the water inlets of each denitrification filter can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a denitrification filter assembly in an embodiment;

[0018] Figure 2 It is a cross-sectional view of a denitrification filter in an embodiment;

[0019] Figure 3 It is a cross-sectional view of the denitrification filter from another perspective in an embodiment;

[0020] Figure 4 It is a combined view of the backwashing aeration pipe and the air distribution member of the denitrification filter in an embodiment;

[0021] Figure 5 is Figure 4 an enlarged schematic view of part A in

[0022] Figure 6 a schematic structural view of the air distribution component of the denitrification filter in an embodiment;

[0023] Figure 7 is a schematic structural view of the air distribution component of the denitrification filter in another perspective in an embodiment. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, "and / or" throughout the text includes three solutions. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] such as Figure 1As shown in the figure, the present application provides a denitrification filter assembly 1, which includes a plurality of denitrification filters 10 arranged side by side. Each denitrification filter 10 includes a tank body 100 and denitrification packing 200. An inlet 110 and an outlet 120 are respectively arranged on opposite sides of the tank body 100. The denitrification packing 200 is arranged in the tank body 100. The sewage to be treated can flow into the tank body 100 through the inlet 110 and then flow out of the tank body 100 through the outlet 120. The denitrification packing 200 is used for denitrifying the sewage flowing through it. The height of the inlet 110 of each denitrification filter 10 is adjustable so that the heights of the inlets 110 of each denitrification filter 10 are kept flush with each other.

[0028] In the above denitrification filter assembly 1, denitrification packing 200 is arranged in the tank body 100 of each denitrification filter 10. When the sewage to be treated flows through the denitrification packing 200, the denitrification packing 200 can denitrify the sewage flowing through it to convert nitrate nitrogen in the sewage into nitrogen gas, thereby realizing the denitrification treatment of the sewage. In this solution, since the height of the inlet 110 of each denitrification filter 10 is adjustable, the operator can flexibly adjust the height of the inlet 110 of each denitrification filter 10 according to the water inlet requirement so that the heights of the inlets 110 of each denitrification filter 10 are kept flush. In this way, when the sewage to be treated flows to the denitrification filter assembly 1, the water level and the water inlet volume balance in the tank body 100 of each side-by-side denitrification filter 10 can be ensured, and the problem of uneven water inlet volume of each denitrification filter 10 (for example, the denitrification filter 10 with a lower inlet 110 fills with water first and has a large water inlet volume, while the denitrification filter 10 with a higher inlet 110 has no water inlet) caused by the inconsistent height of the inlets 110 of each denitrification filter 10 can be avoided.

[0029] Such as Figure 2As shown, optionally, the water inlet 110 includes a water inlet pipe 111. The water inlet pipe 111 includes a horizontally connected horizontal water inlet pipe section 112 and a vertically connected vertical water inlet pipe section 113. The water outlet end of the horizontal water inlet pipe section 112 extends into the pool body 100 from the side of the pool body 100 away from the water outlet 120. The water inlet end of the horizontal water inlet pipe section 112 is located outside the pool body 100. The vertical water inlet pipe section 113 is located outside the pool body 100. The water inlet end of the vertical water inlet pipe section 113 is above the water outlet end of the vertical water inlet pipe section 113. The water outlet end of the vertical water inlet pipe section 113 is detachably connected to the water inlet end of the horizontal water inlet pipe section 112. The sewage to be treated can flow into the vertical water inlet pipe section 113 through the water inlet port of the vertical water inlet pipe section 113 in sequence, then flow into the horizontal water inlet pipe section 112 through the water outlet port of the vertical water inlet pipe section 113 and the water inlet port of the horizontal water inlet pipe section 112 in sequence, and then flow into the pool body 100 from the water outlet port of the horizontal water inlet pipe section 112. The length of the vertical water inlet pipe section 113 is adjustable so that the height of the water inlet port of the vertical water inlet pipe section 113 is adjustable. With such a setting, when it is necessary to adjust the height of the water inlet 110, the operator only needs to replace the vertical water inlet pipe section 113 with a suitable length, effectively improving the convenience of adjusting the height of the water inlet 110 of each denitrification filter 10.

[0030] Furthermore, the water inlet pipe 111 can be a PVC pipe, and the horizontal water inlet pipe section 112 and the vertical water inlet pipe section 113 are connected by an arc transition. Further, the water inlet 110 is provided with a water inlet grid 130, and the water inlet grid 130 is used for preliminary grid treatment of the sewage, so as to reduce the fouling of the denitrification filler 200. Specifically, the water inlet port of the vertical water inlet pipe section 113 is provided with a water inlet grid 130.

[0031] Preferably, the height of the water outlet 120 is adjustable so that the water level difference between the water inlet 110 and the water outlet 120 is adjustable.

[0032] In this solution, since the height of the water outlet 120 of the denitrification filter 10 is adjustable, when it is found during the on-site operation of the denitrification filter 10 that the denitrification filter 10 cannot operate normally due to unreasonable design head loss, the operator can adjust the height of the water outlet 120 of the denitrification filter 10 to flexibly adjust the water level difference between the water inlet 110 and the water outlet 120, that is, the design head loss of the denitrification filter 10, to cope with various different situations, so that the design head loss and the actual head loss can match, thereby ensuring the normal operation of the denitrification filter 10.

[0033] Such as Figure 2As shown, the water outlet 120 includes a water outlet pipe 121. The water outlet pipe 121 includes a horizontal water outlet pipe section 122 and a vertical water outlet pipe section 123. The inlet end of the horizontal water outlet pipe section 122 extends into the pool body 100 from the side of the pool body 100 far away from the water inlet 110, the outlet end of the horizontal water outlet pipe section 122 is located outside the pool body 100, the vertical water outlet pipe section 123 is located inside the pool body 100, the inlet end of the vertical water outlet pipe section 123 is above the outlet end of the vertical water outlet pipe section 123, and the outlet end of the vertical water outlet pipe section 123 is detachably connected to the inlet end of the horizontal water outlet pipe section 122. The water outlet of the denitrifying filler 200 can flow into the vertical water outlet pipe section 123 through the inlet end of the vertical water outlet pipe section 123 in sequence, then flow into the horizontal water outlet pipe section 122 through the outlet end of the vertical water outlet pipe section 123 and the inlet end of the horizontal water outlet pipe section 122 in sequence, and then flow out of the pool body 100 from the outlet end of the horizontal water outlet pipe section 122. The length of the vertical water outlet pipe section 123 is adjustable, so that the height of the inlet end of the vertical water outlet pipe section 123 is adjustable. With such a setting, when it is necessary to adjust the height of the water outlet 120, the operator only needs to replace the vertical water outlet pipe section 123 with a suitable length, effectively improving the convenience of height adjustment of the water outlet 120 of the denitrifying filter tank 10.

[0034] Furthermore, the water outlet pipe 121 can be a PVC pipe, and the horizontal water outlet pipe section 122 and the vertical water outlet pipe section 123 are connected by an arc transition. Further, the water outlet 120 is provided with a water outlet grid 140. On the one hand, the water outlet grid 140 can prevent the dirt outside the pool body 100 from entering the pool body 100 to pollute the water body, and at the same time, it can also prevent the denitrifying filler 200 in the pool body 100 from flowing out of the pool body 100, so as to avoid the loss of the denitrifying filler 200. Specifically, the water outlet grid 140 is arranged at the inlet port of the vertical water outlet pipe section 123.

[0035] Preferably, the denitrifying filler 200 is a sulfur autotrophic denitrifying filler 200, and the sulfur autotrophic denitrifying filler 200 is used for sulfur autotrophic denitrification treatment of the flowing sewage. Specifically, when the sewage flows through the sulfur autotrophic denitrifying filler 200, through the denitrification of sulfur autotrophic denitrifying microorganisms and using sulfur or reduced sulfide as an electron donor, the nitrate nitrogen in the sewage is converted into nitrogen gas, thereby realizing the denitrification treatment of the sewage, with high removal efficiency, no need to add organic carbon sources, and low operating costs.

[0036] As Figure 2As shown in the figure, a preparation area 101 and a packing area 102 which are connected and communicated with each other are arranged in the pond body 100. The preparation area 101 and the packing area 102 are arranged in sequence along the length direction or the width direction of the pond body 100. An inlet 110 is arranged in the preparation area 101. An outlet 120 is arranged in the packing area 102. The sewage to be treated flows in from the inlet 110, successively passes through the preparation area 101 and the packing area 102, and flows out of the pond body 100 from the outlet 120. The denitrification packing 200 is arranged in the packing area 102.

[0037] Specifically, on the one hand, the preparation area 101 can be used for guiding and distributing the sewage, so that the sewage can further flow through the denitrification packing 200 along a specified path. At the same time, the preparation area 101 also has the functions of sludge discharge and maintenance, so as to discharge the sludge deposited in the denitrification filter tank 10 in time and carry out maintenance on the denitrification filter tank 10.

[0038] As Figure 2 and Figure 3 shown in the figure, further, a partition board 103 is arranged in the pond body 100. The partition board 103 divides the internal space of the pond body 100 into a preparation area 101 and a packing area 102. Further, a water passing port 104 is arranged on the partition board 103. The water passing port 104 communicates the preparation area 101 and the packing area 102, and the water passing port 104 is located below the outlet 120. Specifically, the water passing port 104 is arranged at the bottom of the partition board 103.

[0039] Specifically, the sewage to be treated flows into the preparation area 101 through the inlet 110. The preparation area 101 guides and distributes the sewage. Then, the sewage in the preparation area 101 enters the packing area 102 through the water passing port 104. Since the water passing port 104 is located below the outlet 120, the sewage can flow through the denitrification packing 200 from bottom to top and then flow out of the pond body 100 from the outlet 120. In the process of the sewage flowing through the denitrification packing 200, the nitrate nitrogen in the sewage is converted into nitrogen gas. Since the flow direction of the sewage is consistent with the diffusion direction of the nitrogen gas, the sewage in the denitrification filter tank 10 flows upward with the nitrogen gas, effectively avoiding the accumulation of nitrogen gas inside the denitrification packing 200 and preventing the denitrification packing 200 from being blocked by nitrogen gas. Thereby, the operation cycle of the denitrification filter tank 10 is prolonged and the operation cost of the denitrification filter tank 10 is reduced.

[0040] As Figure 2 shown in the figure, further, the denitrification filter tank 10 further includes an anti-flushing aeration pipe 300. The anti-flushing aeration pipe 300 is arranged in the packing area 102 and is located at the bottom of the denitrification packing 200. The anti-flushing aeration pipe 300 is used for performing aeration and anti-flushing operations on the denitrification packing 200 to remove the suspended matters and the shed biological membranes deposited on the denitrification packing 200, etc.

[0041] As Figure 2 andFigure 4 As shown in the figure, the backwashing aeration pipe 300 includes a vertically connected vertical aeration pipe section 310 and a horizontal aeration pipe section 320. The vertical aeration pipe section 310 is arranged in the blending area 101. One end of the horizontal aeration pipe section 320 is connected to the vertical aeration pipe section 310, and the other end of the horizontal aeration pipe section 320 extends into the packing area 102. The horizontal aeration pipe section 320 is located at the bottom of the denitrification packing 200, and a plurality of aeration holes are arranged at intervals on the horizontal aeration pipe section 320.

[0042] Specifically, one end of the vertical aeration pipe section 310 extends out of the pool body 100 through the top of the blending area 101. One end of the horizontal aeration pipe section 320 passes through the partition plate 103 and extends into the packing area 102. The horizontal aeration pipe section 320 and the vertical aeration pipe section 310 are connected by an arc transition. A valve 330 is arranged on the backwashing aeration pipe 300. The valve 330 is used to control the on-off of the backwashing aeration pipe 300. The valve 330 is exposed outside the pool body 100, and the valve 330 is arranged at one end of the vertical aeration pipe section 310 far from the horizontal aeration pipe section 320.

[0043] The denitrification filter 10 further includes a blower, and the blower is connected to the backwashing aeration pipe 300. The blower is used to provide the gas (such as air) required for aeration backwashing to the backwashing aeration pipe 300. Specifically, the blower can be arranged outside the pool body 100 and connected to one end of the vertical aeration pipe section 310 extending out of the pool body 100.

[0044] Preferably, the denitrification filter 10 further includes a water level detector. The water level detector can be a liquid level switch such as a float ball or an ultrasonic liquid level gauge. The water level detector is arranged in the blending area 101, and the water level detector is used to detect the water level height in the blending area 101. As the denitrification filter 10 operates, the denitrification packing 200 will become more and more blocked, and the water level in the blending area 101 will become higher and higher. By setting the water level detector, when the water level detector detects that the liquid level in the blending area 101 reaches the preset height, the operator can immediately start the aeration backwashing operation of the backwashing aeration pipe 300, thereby effectively improving the timeliness of the backwashing of the denitrification packing 200.

[0045] Preferably, the denitrification filter 10 further includes a controller. The controller is electrically connected to the water level detector and the blower. The water level detector is used to detect the water level height in the blending area 101 and feed back the detection result to the controller. The controller is used to control the operation of the blower according to the detection result of the water level detector. Specifically, when the controller receives the feedback that the liquid level in the blending area 101 reaches the preset height from the water level detector, the controller can send a feedback command to the blower to control the blower to automatically start supplying gas to the backwashing aeration pipe 300, so as to realize the aeration backwashing operation of the denitrification packing 200 through the backwashing aeration pipe 300.

[0046] AsFigure 2 and Figure 4 As shown in Figure 4 , the denitrification filter 10 further includes an air distribution member 400. The air distribution member 400 is disposed in the packing area 102 and sleeved outside the backwashing aeration pipe 300. Specifically, the air distribution member 400 is sleeved outside the horizontal aeration pipe section 320 of the backwashing aeration pipe 300. The air distribution member 400 is used to increase the aeration volume and aeration intensity of the backwashing aeration pipe 300, so that the backwashing effect of the denitrification packing 200 is better and more uniform.

[0047] Further, there are multiple air distribution members 400, and the multiple air distribution members 400 are arranged side by side and sleeved outside the same backwashing aeration pipe 300 to meet the actual air distribution and installation requirements of the relatively long backwashing aeration pipe 300. Specifically, the multiple air distribution members 400 are arranged side by side and sleeved outside the horizontal aeration pipe section 320 of the same backwashing aeration pipe 300, and two adjacent air distribution members 400 are arranged in contact with each other.

[0048] Further, the backwashing aeration pipe 300 and at least one air distribution member 400 sleeved outside the backwashing aeration pipe 300 together form an aeration backwashing assembly 301. There are multiple groups of the aeration backwashing assemblies 301, and the multiple groups of aeration backwashing assemblies 301 are arranged at intervals in the pool body 100. Preferably, the multiple groups of aeration backwashing assemblies 301 are evenly arranged at intervals in the pool body 100, so that the air distribution of the aeration backwashing assembly 301 is more uniform and the backwashing effect of the denitrification packing 200 is better.

[0049] As Figure 5 and Figure 6 shown in Figure 6 , in an optional embodiment, an air storage tank 410 extending along the length direction of the air distribution member 400 is arranged in the air distribution member 400, and a plurality of exhaust holes 420 spaced along the length direction are further arranged on the side wall of the air distribution member 400. Each exhaust hole 420 is communicated with the air storage tank 410. The air storage tank 410 is used to accommodate the backwashing aeration pipe 300 and store the gas output by the backwashing aeration pipe 300, and the exhaust holes 420 are used to discharge the gas stored in the air storage tank 410.

[0050] Specifically, when the air distribution member 400 is used in cooperation with the backwashing aeration pipe 300 to perform aeration backwashing operation on the denitrification filler 200, the gas output by the backwashing aeration pipe 300 is continuously stored in the air storage tank 410 of the air distribution member 400. At this time, the air pressure and air volume in the air storage tank 410 continuously increase. When the air pressure and air volume in the air storage tank 410 expand to a certain value, the gas in the air storage tank 410 is discharged from a plurality of exhaust holes 420 provided on the side wall of the air distribution member 400, thereby realizing the aeration backwashing operation on the denitrification filler 200. Therefore, by sleeving the air distribution member 400 outside the backwashing aeration pipe 300, the aeration volume and aeration intensity of the backwashing aeration pipe 300 are effectively expanded, thereby effectively enhancing the backwashing aeration effect of the backwashing aeration pipe 300, making the air distribution of the backwashing aeration pipe 300 more uniform, and the backwashing effect of the denitrification filler 200 better and more uniform.

[0051] Specifically, the air storage tank 410 is used to accommodate the horizontal aeration pipe section 320 of the backwashing aeration pipe 300. A first opening 411 is provided on one side in the depth direction of the air storage tank 410, and second openings 412 are provided at both ends in the length direction of the air storage tank 410. The first opening 411 facilitates the operator to install and disassemble the backwashing aeration pipe 300 relative to the air storage tank 410 from the depth direction of the air storage tank 410, and the second opening 412 facilitates the operator to install and disassemble the backwashing aeration pipe 300 relative to the air storage tank 410 from the length direction of the air storage tank 410. Both ends of the horizontal aeration pipe section 320 can extend out of the air storage tank 410 through the second openings 412 provided at both ends in the length direction of the air storage tank 410.

[0052] Specifically, the inner contour of the air storage tank 410 matches the outer contour of the backwashing aeration pipe 300, so that the backwashing aeration pipe 300 and the air distribution member 400 can be more tightly connected. Specifically, the air storage tank 410 is a U-shaped groove, and the inner contour of the air storage tank 410 matches the outer contour of the horizontal aeration pipe section 320.

[0053] Further, a plurality of exhaust holes 420 are spaced apart on both opposite sides of the air distribution member 400 to enhance the exhaust effect of the air distribution member 400. Preferably, a plurality of exhaust holes 420 are evenly spaced apart on both opposite sides of the air distribution member 400, and each exhaust hole 420 provided on one side of the air distribution member 400 is aligned with each exhaust hole 420 provided on the opposite side of the air distribution member 400 to improve the exhaust uniformity of the air distribution member 400.

[0054] Further, a guiding inclined surface 422 is provided at the air outlet end of the exhaust hole 420 to guide the gas stored in the air storage tank 410 to be discharged along a set direction, and the air distribution uniformity is better.

[0055] As Figure 7As shown, optionally, the air distribution member 400 includes a first connection portion 430, a second connection portion 440, and a third connection portion 450. The second connection portion 440 and the third connection portion 450 are respectively disposed on opposite sides of the first connection portion 430. The first connection portion 430, the second connection portion 440, and the third connection portion 450 enclose to form an air storage tank 410. A plurality of exhaust holes 420 are spacedly provided on the second connection portion 440 and / or the third connection portion 450. Specifically, both the second connection portion 440 and the third connection portion 450 are perpendicularly connected to the first connection portion 430, and the second connection portion 440 and the third connection portion 450 are symmetrically disposed on opposite sides of the first connection portion 430.

[0056] Further, a partition rib 460 is provided between two adjacent exhaust holes 420, that is, two adjacent exhaust holes 420 are separated by the partition rib 460. The cross-sectional shape of the partition rib 460 may be, but is not limited to, a rectangle. The first connection portion 430, the second connection portion 440, the third connection portion 450, and the partition rib 460 are integrally formed to facilitate the overall processing and forming of the air distribution member 400.

[0057] Specifically in this embodiment, chamfered slopes 470 are provided at the connection between the first connection portion 430 and the second connection portion 440 and at the connection between the first connection portion 430 and the third connection portion 450. Specifically, the chamfered slopes 470 at the connection between the first connection portion 430 and the second connection portion 440 and the chamfered slopes 470 at the connection between the first connection portion 430 and the third connection portion 450 have opposite inclination directions.

[0058] As Figure 2 shown, the denitrification filter 10 further includes a support layer 500. The support layer 500 is disposed in the packing zone 102, and the denitrification packing 200 is carried on the support layer 500. Preferably, the support layer 500 may be a support grid having a plurality of perforations. The support grid may be a plate-like structure. Since the support grid has a plurality of perforations, the support grid can not only play a good supporting role, but also has the advantages of good water passing and air passing, which is beneficial to improving the overall performance of the denitrification filter 10.

[0059] As Figure 2 shown, in order to more stably support the denitrification packing 200 and the support layer 500, the denitrification filter 10 further includes a support member 600. The support member 600 is disposed in the packing zone 102, the support layer 500 is carried on the support member 600, and the denitrification packing 200, the support layer 500, and the support member 600 are distributed in sequence from top to bottom.

[0060] Optionally, the support member 600 includes a plurality of support rods 610, which are arranged at intervals in the packing area 102, and each support rod 610 is connected between the opposite inner sidewalls of the packing area 102. Specifically, the horizontal aeration pipe section 320 of the backwashing aeration pipe 300 is carried on the support member 600 and is located between the support member 600 and the supporting layer 500, and the air distribution member 400 is carried on the support member 600 and is located between the support member 600 and the supporting layer 500.

[0061] Specifically in this embodiment, the air distribution member 400 is clamped with the support member 600 so that the air distribution member 400 is fixedly connected to the support member 600. It can be understood that in other embodiments, the air distribution member 400 and the support member 600 can also be fixedly connected by means of threaded connection or welding.

[0062] As Figure 2 shown, further, a sludge discharge area 700 is provided at the bottom of the packing area 102. The sludge discharge area 700 slopes obliquely downward from the first side of the packing area 102 to the second side of the packing area 102. Specifically, the first side of the packing area 102 is the side of the packing area 102 away from the blending area 101, and the second side of the packing area 102 is the side of the packing area 102 close to the blending area 101, that is, the lower side of the sludge discharge area 102 is arranged close to the blending area 101.

[0063] Specifically, the biofilm detached from the denitrifying packing 200 can usually only be discharged from the upper part of the denitrifying filter 10 through the backwashing process, which results in the lower-layer denitrifying packing 200 being more likely to be blocked. Therefore, by providing the sludge discharge area 700 at the bottom of the packing area 102, the sludge deposited in the packing area 102 can be regularly removed to prevent it from fouling and blocking the lower-layer denitrifying packing 200; in addition, by setting the sludge discharge area 700 in an inclined form, the sludge can slide down along the slope of the sludge discharge area 700 and concentrate at the lower part of the sludge discharge area 700, so as to facilitate the collection and cleaning of the sludge.

[0064] As Figure 1 shown, in one embodiment, the denitrifying filters 10 are connected together, and the connection parts of the tank bodies 100 of two adjacent denitrifying filters 10 are shared with each other to save the manufacturing cost of the whole denitrifying filter assembly 1.

[0065] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A denitrification filter assembly, characterized in that, Comprising: A plurality of denitrification filters arranged side by side, each denitrification filter comprising a tank body and denitrification packing. Inlet and outlet ports are respectively arranged on opposite sides of the tank body. The denitrification packing is disposed within the tank body. Sewage to be treated can flow into the tank body through the inlet port and then flow out of the tank body through the outlet port. The denitrification packing is used for denitrifying the sewage flowing through it. The heights of the inlet ports of the respective denitrification filters are adjustable so that the heights of the inlet ports of the respective denitrification filters are kept flush.

2. The denitrification filter assembly according to claim 1, characterized in that, The inlet port includes an inlet pipe, which includes a horizontally extending inlet pipe section and a vertically extending inlet pipe section connected perpendicularly. The outlet end of the horizontally extending inlet pipe section extends into the tank body through the side of the tank body away from the outlet port. The inlet end of the horizontally extending inlet pipe section is located outside the tank body. The vertically extending inlet pipe section is located outside the tank body. The inlet end of the vertically extending inlet pipe section is above the outlet end of the vertically extending inlet pipe section. The outlet end of the vertically extending inlet pipe section is detachably connected to the inlet end of the horizontally extending inlet pipe section. Sewage to be treated can flow into the vertically extending inlet pipe section through the inlet port of the vertically extending inlet pipe section in sequence, then flow into the horizontally extending inlet pipe section through the outlet port of the vertically extending inlet pipe section and the inlet port of the horizontally extending inlet pipe section in sequence, and then flow into the tank body through the outlet port of the horizontally extending inlet pipe section. The length of the vertically extending inlet pipe section is adjustable so that the height of the inlet port of the vertically extending inlet pipe section is adjustable.

3. The denitrification filter assembly according to claim 2, wherein, The horizontally extending inlet pipe section and the vertically extending inlet pipe section are connected by an arc transition.

4. The denitrification filter assembly according to claim 1, wherein, An inlet grid is provided at the inlet port.

5. The denitrification filter assembly according to claim 1, wherein A mixing zone and a packing zone that are connected and communicate with each other are arranged within the tank body. The mixing zone and the packing zone are distributed in sequence along the length or width direction of the tank body. The inlet port is arranged in the mixing zone. The outlet port is arranged in the packing zone. Sewage to be treated flows in through the inlet port and flows out of the tank body through the outlet port after passing through the mixing zone and the packing zone in sequence. The denitrification packing is disposed within the packing zone.

6. The denitrification filter assembly according to claim 5, characterized in that, The denitrification filter further includes an anti-backwashing aeration pipe, which is disposed within the packing zone and at the bottom of the denitrification packing. The anti-backwashing aeration pipe is used for performing an aeration anti-backwashing operation on the denitrification packing.

7. The denitrification filter assembly according to claim 6, characterized in that The anti-backwashing aeration pipe includes a vertically extending aeration pipe section and a horizontally extending aeration pipe section connected perpendicularly. The vertically extending aeration pipe section is disposed within the mixing zone. One end of the horizontally extending aeration pipe section is connected to the vertically extending aeration pipe section. The other end of the horizontally extending aeration pipe section extends into the packing zone. The horizontally extending aeration pipe section is located at the bottom of the denitrification packing. A plurality of aeration holes are arranged at intervals on the horizontally extending aeration pipe section.

8. The denitrification filter assembly according to claim 6, characterized in that The denitrification filter further includes a gas distribution member, which is disposed within the packing zone and sleeved outside the anti-backwashing aeration pipe. The gas distribution member is used for expanding the aeration volume and aeration intensity of the anti-backwashing aeration pipe.

9. The denitrification filter assembly according to claim 6, characterized in that, The denitrification filter further includes a water level detector, which is arranged in the preparation area and is used to detect the water level height in the preparation area.

10. The denitrification filter assembly according to claim 1, characterized in that, All the denitrification filters are connected as a whole, and the connection parts of the pool bodies of two adjacent denitrification filters share each other.

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