Gas distribution piece and denitrification filter tank

Abstract

The gas distribution piece is used for being arranged on the outer side of a backwashing aeration pipe of the denitrification filter in a sleeving mode, a gas storage tank extending in the length direction of the gas distribution piece is arranged in the gas distribution piece, and a plurality of exhaust holes distributed in the length direction of the gas distribution piece at intervals are further formed in the side wall of the gas distribution piece. Each exhaust hole is communicated with the gas storage tank, the gas storage tank is used for accommodating a backwashing aeration pipe and storing gas output by the backwashing aeration pipe, and the exhaust holes are used for exhausting the gas stored in the gas storage tank. According to the back-flushing aeration pipe, the outer side of the back-flushing aeration pipe is sleeved with the gas distribution piece, so that the aeration amount and the aeration strength of the back-flushing aeration pipe are effectively increased, the back-flushing aeration effect of the back-flushing aeration pipe is effectively enhanced, gas distribution of the back-flushing aeration pipe is more uniform, and the back-flushing effect of denitrification filler is better and more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment, and particularly to a gas distribution member and a denitrification filter tank. Background Art

[0002] A denitrification filter tank is a biological filter tank with a denitrification and nitrogen removal function. It is developed on the basis of a traditional biological filter tank. In the denitrification filter tank, the denitrification filler serves as a carrier for the biological membrane. With the denitrification effect of relevant microorganisms, nitrate nitrogen in sewage is reduced to nitrogen gas and discharged, thereby achieving nitrogen removal from sewage. During the operation of the denitrification filter tank, the denitrification filler is often prone to blockage and needs to be backwashed. However, the current backwashing uniformity effect achieved by directly performing aeration backwashing operation on the denitrification filler through a backwashing aeration pipe is difficult to reach a satisfactory level. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a gas distribution member and a denitrification filter tank that can make the backwashing effect of the denitrification filler better and more uniform.

[0004] A gas distribution member is used to be sleeved outside the backwashing aeration pipe of a denitrification filter tank. A gas storage tank extending along the length direction of the gas distribution member is arranged inside the gas distribution member, and a plurality of exhaust holes spaced along the length direction of the gas distribution member are further arranged on the side wall of the gas distribution member. Each of the exhaust holes is communicated with the gas storage tank. The gas storage tank is used to accommodate the backwashing aeration pipe and store the gas output by the backwashing aeration pipe, and the exhaust holes are used to discharge the gas stored in the gas storage tank.

[0005] In one embodiment, a plurality of the exhaust holes are spaced and arranged on both opposite sides of the gas distribution member.

[0006] In one embodiment, each of the exhaust holes arranged on one side of the gas distribution member is aligned with each of the exhaust holes arranged on the opposite side of the gas distribution member.

[0007] In one embodiment, a first opening is arranged on one side in the depth direction of the gas storage tank, and second openings are arranged at both ends in the length direction of the gas storage tank;

[0008] and / or

[0009] The inner contour of the gas storage tank matches the outer contour of the backwashing aeration pipe;

[0010] and / or

[0011] A guiding inclined surface is arranged at the gas outlet end of the exhaust hole.

[0012] In one embodiment, the air distribution member includes a first connection portion, a second connection portion, and a third connection portion. The second connection portion and the third connection portion are respectively disposed on opposite sides of the first connection portion. The first connection portion, the second connection portion, and the third connection portion enclose to form the air storage tank. A plurality of the exhaust holes are spaced apart on the second connection portion and / or the third connection portion.

[0013] In one embodiment, partition ribs are provided between adjacent two of the exhaust holes.

[0014] In one embodiment, the first connection portion, the second connection portion, the third connection portion, and the partition ribs are integrally formed.

[0015] A denitrification filter tank includes: a tank body, denitrification fillers, a backwashing aeration pipe, and the above-mentioned air distribution member. The denitrification fillers are disposed in the tank body. The backwashing aeration pipe is disposed in the tank body and is located at the bottom of the denitrification fillers.

[0016] In one embodiment, a plurality of the air distribution members are included, and the plurality of air distribution members are sleeved side by side on the outer side of the same backwashing aeration pipe.

[0017] In one embodiment, the backwashing aeration pipe and at least one of the air distribution members sleeved on the outer side of the backwashing aeration pipe together form an aeration backwashing assembly. The aeration backwashing assembly includes multiple groups, and the multiple groups of aeration backwashing assemblies are spaced apart in the tank body.

[0018] When using the air distribution member to cooperate with the backwashing aeration pipe to perform aeration backwashing operation on the denitrification fillers, the gas output by the backwashing aeration pipe is first continuously stored in the air storage tank of the air distribution member. At this time, the air pressure and air volume in the air storage tank continuously increase. When the air pressure and air volume in the air storage tank expand to a certain value, the gas in the air storage tank is discharged from a plurality of exhaust holes provided on the side wall of the air distribution member, so as to realize the aeration backwashing operation on the denitrification fillers. Therefore, by sleeving the air distribution member on the outer side of the backwashing aeration pipe, the aeration volume and aeration intensity of the backwashing aeration pipe are effectively expanded, thereby effectively enhancing the backwashing aeration effect of the backwashing aeration pipe, making the air distribution of the backwashing aeration pipe more uniform, and the backwashing effect of the denitrification fillers better and more uniform. Description of the Drawings

[0019] 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 in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0020] Figure 1 It is a cross-sectional view of a denitrification filter in an embodiment;

[0021] Figure 2 It is a schematic structural diagram of an air distribution component of a denitrification filter in an embodiment;

[0022] Figure 3 It is a schematic structural diagram of another perspective of the air distribution component of a denitrification filter in an embodiment;

[0023] Figure 4 It is a combined diagram of the backwashing aeration pipe and the air distribution component of a denitrification filter in an embodiment;

[0024] Figure 5 It is Figure 4 an enlarged schematic diagram of the position A in

[0025] Figure 6 It is a cross-sectional view of another perspective of a denitrification filter in an embodiment;

[0026] Figure 7 It is a schematic structural diagram of a denitrification filter assembly in an embodiment. Detailed implementation manners

[0027] 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 shall fall within the protection scope of the present invention.

[0028] 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 accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, the descriptions involving "first", "second", etc. in the present utility model are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution where both A and B are satisfied simultaneously. Additionally, the technical solutions between 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 results in contradictions or inability to implement, 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 utility model.

[0030] As Figure 1 shown, the present application provides a denitrification filter 10, which includes a tank body 100, denitrification fillers 200, a backwashing air pipe 300, and a gas distribution member 400. The denitrification fillers 200 are arranged in the tank body 100 and are used for denitrifying the sewage flowing through to convert nitrate nitrogen in the sewage into nitrogen gas, thereby achieving the denitrification treatment of the sewage. The backwashing air pipe 300 is arranged in the tank body 100 and is located at the bottom of the denitrification fillers 200. The backwashing air pipe 300 is used for performing an aeration backwashing operation on the denitrification fillers 200 to remove suspended matter deposited on the denitrification fillers 200, shed biofilms, etc. The gas distribution member 400 is arranged in the tank body 100 and is sleeved outside the backwashing air pipe 300. The gas distribution member 400 is used for expanding the aeration volume and aeration intensity of the backwashing air pipe 300, so that the backwashing effect of the denitrification fillers 200 is better and more uniform.

[0031] As Figure 2 shown, a gas storage tank 410 extending along the length direction of the gas distribution member 400 is arranged in the gas distribution member 400, and a plurality of exhaust holes 420 spaced apart along the length direction of the gas distribution member 400 are further arranged on the side wall of the gas distribution member 400. Each exhaust hole 420 is communicated with the gas storage tank 410. The gas storage tank 410 is used for accommodating the backwashing air pipe 300 and storing the gas output by the backwashing air pipe 300, and the exhaust holes 420 are used for discharging the gas stored in the gas storage tank 410.

[0032] Specifically, when the denitrification filler 200 is aerated and backwashed by using the air distribution member 400 in cooperation with the backwash aeration pipe 300, the gas output by the backwash aeration pipe 300 is first 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 are continuously increased. When the air pressure and air volume in the air storage tank 410 are expanded to a certain value, the gas in the air storage tank 410 is discharged from the multiple exhaust holes 420 provided on the side wall of the air distribution member 400, thereby realizing the aeration and backwashing operation of the denitrification filler 200. Therefore, by arranging the air distribution member 400 on the outside of the backwash aeration pipe 300, the aeration volume and aeration intensity of the backwash 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.

[0033] Further, multiple exhaust holes 420 are arranged at intervals on opposite sides of the air distributing member 400 to enhance the exhaust effect of the air distributing member 400. Preferably, multiple exhaust holes 420 are evenly arranged at intervals on opposite sides of the air distributing member 400, and each exhaust hole 420 arranged on one side of the air distributing member 400 is aligned with each exhaust hole 420 arranged on the other side opposite to the air distributing member 400 to improve the exhaust uniformity of the air distributing member 400.

[0034] like Figure 2 As shown, a first opening 411 is provided on one side of the air storage tank 410 in the depth direction, and second openings 412 are provided at both ends of the air storage tank 410 in the length direction. The first opening 411 facilitates the operator to install and remove the backwash 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 remove the backwash aeration pipe 300 relative to the air storage tank 410 from the length direction of the air storage tank 410.

[0035] Specifically, the inner contour of the air storage tank 410 matches the outer contour of the backwash aeration pipe 300, so that the backwash aeration pipe 300 and the air distribution member 400 can be more closely connected. Specifically, the air storage tank 410 is a U-shaped tank, and the inner contour of the air storage tank 410 matches the outer contour of the horizontal aeration pipe section 320.

[0036] like Figure 2 As shown, further, a guide slope 422 is provided at the gas outlet end of the gas outlet hole 420 to guide the gas stored in the gas storage tank 410 to be discharged along a set direction, so that the gas distribution uniformity is better.

[0037] like Figure 3As 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 an air storage tank 410. A plurality of exhaust holes 420 are spaced apart 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.

[0038] Furthermore, 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 can 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.

[0039] Specifically in this embodiment, chamfered slopes 470 are provided at the joints of the first connection portion 430 and the second connection portion 440 and at the joints of the first connection portion 430 and the third connection portion 450. Specifically, the chamfered slopes 470 at the joints of the first connection portion 430 and the second connection portion 440 and the chamfered slopes 470 at the joints of the first connection portion 430 and the third connection portion 450 have opposite inclination directions.

[0040] As Figure 4 and Figure 5 shown, furthermore, the air distribution member 400 includes a plurality of them. The plurality of air distribution members 400 are sleeved side by side on the outside of the same backwashing aeration pipe 300 to meet the actual air distribution and installation requirements of the relatively long backwashing aeration pipe 300. Adjacent air distribution members 400 are disposed in contact with each other.

[0041] Furthermore, the backwashing aeration pipe 300 and at least one air distribution member 400 sleeved on the outside of the backwashing aeration pipe 300 together constitute an aeration backwashing assembly 301. The aeration backwashing assembly 301 includes multiple groups. The multiple groups of aeration backwashing assemblies 301 are spaced apart in the pool body 100. Preferably, the multiple groups of aeration backwashing assemblies 301 are evenly spaced 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 filler 200 is better.

[0042] As Figure 6As shown, water inlets 110 and water outlets 120 are respectively arranged on opposite sides of the pond body 100. The sewage to be treated can flow into the pond body 100 through the water inlet 110 and then flow out of the pond body 100 from the water outlet 120. Further, a mixing area 101 and a packing area 102 that are connected and communicate with each other are arranged in the pond body 100. The mixing area 101 and the packing area 102 are sequentially distributed along the length direction or the width direction of the pond body 100; the mixing area 101 is provided with the water inlet 110; the packing area 102 is provided with the water outlet 120; the sewage to be treated flows in from the water inlet 110, sequentially passes through the mixing area 101 and the packing area 102, and flows out of the pond body 100 from the water outlet 120. The denitrification packing 200, the backwashing air pipe 300 and the air distribution member 400 are all arranged in the packing area 102.

[0043] Specifically, on the one hand, the mixing 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 mixing area 101 also has the functions of sludge discharge and maintenance, so as to facilitate the timely discharge of the sludge deposited in the denitrification filter tank 10 and the maintenance of the denitrification filter tank 10.

[0044] As Figure 1 and Figure 6 shown, further, a partition plate 103 is arranged in the pond body 100. The partition plate 103 divides the internal space of the pond body 100 into a mixing area 101 and a packing area 102. Further, a water passing port 104 is arranged on the partition plate 103. The water passing port 104 communicates the mixing area 101 and the packing area 102, and the water passing port 104 is located below the water outlet 120. Specifically, the water passing port 104 is arranged at the bottom of the partition plate 103.

[0045] Specifically, the sewage to be treated flows into the mixing area 101 through the water inlet 110. The mixing area 101 guides and distributes the sewage. Then, the sewage in the mixing area 101 enters the packing area 102 through the water passing port 104. Since the water passing port 104 is located below the water 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 water outlet 120. During 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 prolonging the operation cycle of the denitrification filter tank 10 and reducing the operation cost of the denitrification filter tank 10.

[0046] Preferably, the denitrification filler 200 is a sulfur autotrophic denitrification filler 200, which is used for sulfur autotrophic denitrification treatment of the sewage flowing through it. Specifically, when the sewage flows through the sulfur autotrophic denitrification 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 source, and low operating cost.

[0047] As Figure 1 and Figure 4 shown, the backwashing aeration pipe 300 includes a vertical aeration pipe section 310 and a horizontal aeration pipe section 320 connected vertically. 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 filler area 102. The horizontal aeration pipe section 320 is located at the bottom of the denitrification filler 200, and a plurality of aeration holes are arranged at intervals on the horizontal aeration pipe section 320.

[0048] 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 filler area 102. The horizontal aeration pipe section 320 and the vertical aeration pipe section 310 are connected by an arc transition. As Figure 5 shown, the air storage tank 410 is used to accommodate the horizontal aeration pipe section 320 of the backwashing aeration pipe 300. Both ends of the horizontal aeration pipe section 320 can extend out of the air storage tank 410 through the second openings 412 arranged at both ends of the length direction of the air storage tank 410. The air distribution member 400 is sleeved on the outside of the horizontal aeration pipe section 320, and a plurality of air distribution members 400 are arranged side by side and sleeved on the outside of the horizontal aeration pipe section 320 of the same backwashing aeration pipe 300.

[0049] As Figure 1 and Figure 4 shown, 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.

[0050] The denitrification filter 10 further includes a blower, which 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.

[0051] Preferably, the denitrification filter 10 further includes a water level detector, which can be a liquid level switch such as a float or an ultrasonic liquid level gauge. The water level detector is arranged in the preparation area 101 and is used to detect the water level height in the preparation area 101. As the denitrification filter 10 operates, the denitrification filler 200 will become more and more blocked, and the water level in the preparation 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 preparation area 101 reaches the preset height, the operator can immediately start the aeration backwashing operation of the backwashing air pipe 300, thereby effectively improving the timeliness of the backwashing of the denitrification filler 200.

[0052] Preferably, the denitrification filter 10 further includes a controller, which is electrically connected to the water level detector and the fan. The water level detector is used to detect the water level height in the preparation area 101 and feed back the detection result to the controller. The controller is used to control the operation of the fan according to the detection result of the water level detector. Specifically, when the controller receives the feedback that the liquid level in the preparation area 101 reaches the preset height from the water level detector, the controller can send a feedback command to the fan to control the fan to automatically start supplying air to the backwashing air pipe 300, so as to realize the aeration backwashing operation of the denitrification filler 200 through the backwashing air pipe 300.

[0053] In one embodiment, 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. 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.

[0054] Such as Figure 1As 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. 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, and 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 adjusting the height of the water outlet 120 of the denitrifying filter tank 10.

[0055] 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 and polluting 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 provided at the inlet port of the vertical water outlet pipe section 123.

[0056] As Figure 1 shown, the denitrifying filter tank 10 further includes a support layer 500. The support layer 500 is arranged in the filler area 102, and the denitrifying filler 200 is carried on the support layer 500. Preferably, the support layer 500 can be a support grid with multiple perforations. The support grid can be a plate-like structure. Since the support grid has multiple 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 denitrifying filter tank 10.

[0057] As Figure 1 shown, in order to more stably support the denitrifying filler 200 and the support layer 500, the denitrifying filter tank 10 further includes a support member 600. The support member 600 is arranged in the filler area 102, the support layer 500 is carried on the support member 600, and the denitrifying filler 200, the support layer 500 and the support member 600 are distributed in sequence from top to bottom.

[0058] 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 side walls 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 support 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 support layer 500.

[0059] 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.

[0060] As Figure 1 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.

[0061] Specifically, the biofilm peeled off 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 arranging 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.

[0062] As Figure 7 shown, the present application also provides a denitrifying filter assembly 1, which includes a plurality of denitrifying filters 10 arranged side by side. In one embodiment, each denitrifying filter 10 is integrally connected, and the connection parts of the pool bodies 100 of two adjacent denitrifying filters 10 share each other to save the overall manufacturing cost of the denitrifying filter assembly 1.

[0063] In one embodiment, the height of the water inlet 110 of each denitrifying filter 10 is adjustable so that the heights of the water inlets 110 of each denitrifying filter 10 are kept flush.

[0064] For the above denitrification filter assembly 1, denitrification fillers 200 are arranged in the tank body 100 of each denitrification filter 10. When the sewage to be treated flows through the denitrification fillers 200, the denitrification fillers 200 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 110 of each denitrification filter 10 is adjustable, the operator can flexibly adjust the height of the water inlet 110 of each denitrification filter 10 according to the water inlet demand, so that the heights of the water 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 levels and the water inlet volumes in the tank bodies 100 of each side-by-side denitrification filter 10 can be ensured to be balanced, avoiding the problem of uneven water inlet volumes in each denitrification filter 10 (for example, the denitrification filter 10 with a lower water inlet 110 fills with water first and has a large water inlet volume, while the denitrification filter 10 with a higher water inlet 110 has no water inlet) caused by the inconsistent heights of the water inlets 110 of each denitrification filter 10.

[0065] As Figure 1 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 tank body 100 through the side of the tank body 100 away from the water outlet 120. The water inlet end of the horizontal water inlet pipe section 112 is located outside the tank body 100. The vertical water inlet pipe section 113 is located outside the tank 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 tank 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 this setting, when the height of the water inlet 110 needs to be adjusted, 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.

[0066] 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 in an arc transition. Further, a water inlet grid 130 is arranged at the water inlet 110. The water inlet grid 130 is used for preliminary grid treatment of the sewage, so as to reduce the fouling of the denitrification fillers 200. Specifically, a water inlet grid 130 is arranged at the water inlet port of the vertical water inlet pipe section 113.

[0067] The above are only the preferred embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A gas distribution component, which is used to be sleeved outside the backwashing aeration pipe of a denitrification filter tank, and is characterized in that, A gas distribution member is provided with a gas storage tank extending along the length direction of the gas distribution member, and a plurality of exhaust holes are also provided on the side wall of the gas distribution member and are distributed at intervals along the length direction of the gas distribution member. Each of the exhaust holes is communicated with the gas storage tank. The gas storage tank is used for accommodating the backwashing aeration pipe and storing the gas output by the backwashing aeration pipe, and the exhaust holes are used for discharging the gas stored in the gas storage tank.

2. The air distribution member according to claim 1, wherein, A plurality of the exhaust holes are provided at intervals on both opposite sides of the gas distribution member.

3. The gas distribution member according to claim 2, characterized in that, Each of the exhaust holes provided on one side of the gas distribution member is aligned with each of the exhaust holes provided on the opposite side of the gas distribution member.

4. The air distribution member according to claim 1, wherein A first opening is provided on one side in the depth direction of the gas storage tank, and second openings are provided at both ends in the length direction of the gas storage tank; and / or The inner contour of the gas storage tank matches the outer contour of the backwashing aeration pipe; and / or A guiding inclined surface is provided at the gas outlet end of the exhaust hole.

5. The air distribution component according to claim 1, characterized in that, The gas distribution member includes a first connecting portion, a second connecting portion and a third connecting portion. The second connecting portion and the third connecting portion are respectively provided on opposite sides of the first connecting portion. The first connecting portion, the second connecting portion and the third connecting portion enclose to form the gas storage tank, and a plurality of the exhaust holes are provided at intervals on the second connecting portion and / or the third connecting portion.

6. The air distribution member according to claim 5, characterized in that, A partition rib is provided between two adjacent exhaust holes.

7. The air distribution member according to claim 6, wherein The first connecting portion, the second connecting portion, the third connecting portion and the partition rib are integrally formed.

8. A denitrification filter, characterized in that, Comprising: A pool body, denitrifying filler, a backwashing aeration pipe and the gas distribution member according to any one of claims 1 to 7. The denitrifying filler is arranged in the pool body, and the backwashing aeration pipe is arranged in the pool body and is located at the bottom of the denitrifying filler.

9. The denitrification filter according to claim 8, wherein There are a plurality of the gas distribution members, and the plurality of gas distribution members are sleeved side by side on the outer side of the same backwashing aeration pipe.

10. The denitrification filter according to claim 8, characterized in that, The backwashing aeration pipe and at least one of the gas distribution members sleeved on the outer side of the backwashing aeration pipe together form an aeration backwashing assembly. There are multiple groups of the aeration backwashing assemblies, and the multiple groups of aeration backwashing assemblies are arranged at intervals in the pool body.

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