Water distribution system and biological filter device

Abstract

The application relates to a water distribution system and a biological filter device, which comprises a total water distribution channel and a plurality of water body distribution units, each of the water body distribution units is communicated with the total water distribution channel, and the water body distribution units are respectively used for uniformly distributing wastewater and inputting the wastewater into corresponding reaction pools; the water distribution system and the biological filter device are compact in structure and reasonable in design, on one hand, can uniformly distribute the wastewater, and are beneficial to stable operation of the biological filter device, on the other hand, can effectively adjust a wastewater treatment capacity, and are convenient for backwashing.

Description

Technical Field

[0001] The present invention relates to the technical field of biological sewage treatment, in particular to a water distribution system and a biological filter device. Background Art

[0002] According to the requirements for the treatment of black and odorous rivers in the "Water Pollution Prevention and Control Action Plan", cities at the prefecture level and above are required to complete the treatment goals of black and odorous water bodies before the end of 2020; at present, the governments of various regions have clearly stated that the overall effluent water quality must comply with the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" GB18918-2002 Level B standard or Level A standard.

[0003] The aerated biological filter is a new sewage treatment technology developed in Europe and the United States in the late 1980s. Its unique filler design draws on the advantages of biological filters and biological contact oxidation methods, and integrates multiple wastewater treatment processes such as filtration, adsorption and biological metabolism. It has the advantages of high hydraulic load, strong impact resistance, low sludge production, and no sludge bulking. It can effectively remove SS, COD, BOD, nitrify, denitrify, remove phosphorus, and remove AOX (harmful substances). It is especially suitable for treating municipal sewage and treating black and smelly rivers.

[0004] However, the biological filter devices commonly used in the prior art are usually not convenient for uniformly distributing the wastewater to be treated. On the one hand, it will cause the wastewater to be not evenly distributed to each treatment unit (such as the reaction tank), which not only makes the wastewater treatment effect poor, but also seriously affects the treatment capacity and treatment efficiency of the biological filter device. On the other hand, it is not conducive to the stable operation of the biological filter device; in addition, the existing biological filter devices also have problems such as complex structure, difficult to adjust the treatment capacity, and inconvenient backwashing, which need to be solved urgently. Summary of the Invention

[0005] In order to improve the deficiencies in the prior art, the present invention provides a water distribution system with a compact structure, reasonable design, and the ability to evenly distribute wastewater and arrange the wastewater evenly, and a biofilter device provided with the water distribution system.

[0006] The technical solution adopted in the present invention is:

[0007] A water distribution system includes a main water distribution channel and several water distribution units, each of which is connected to the main water distribution channel. The water distribution units are used to evenly distribute wastewater and input the wastewater into a reaction tank. In this solution, a main water distribution channel is provided to accommodate wastewater requiring treatment and minimize fluctuations in the wastewater. The wastewater then enters the water distribution units and then enters the reaction tank through the water distribution units. The water distribution units evenly distribute the wastewater, allowing the wastewater requiring treatment to enter the reaction tank through the water distribution units, thereby achieving the goal of even water distribution.

[0008] In one solution, the water distribution unit includes a water trough and water distribution troughs arranged on both sides of the water trough. An inlet weir is arranged between the water trough and the water distribution trough. One end of the water trough is connected to the main water distribution channel. The two water distribution troughs in the same water distribution unit are respectively used to connect to the same reaction tank.

[0009] Preferably, the bottoms of the water distribution troughs are respectively provided with openings for connecting water inlet pipes.

[0010] In another solution, the main water distribution channel and the water distribution unit are an integrated structure.

[0011] Preferably, the main water distribution channel is divided into a first water inlet trough and a second water inlet trough by a first partition, and a plurality of baffles are provided in the second water inlet trough for dividing the second water inlet trough into a plurality of water uniformly distributed units, and the first partition is provided with a plurality of water inlet holes, and each of the water inlet holes is respectively connected to the water uniformly distributed units.

[0012] Preferably, water inlet weir plates are provided in each water distribution unit and on both sides of the water inlet hole. The two water inlet weir plates separate the water distribution unit into a water flow trough and water distribution troughs located on both sides of the water flow trough, and the bottoms of the water distribution troughs are provided with openings for connecting water inlet pipes.

[0013] A biological filter device includes a water distribution system and a reaction tank. The water distribution system is arranged in the reaction tank. A plurality of reaction chambers are provided in the reaction tank. A water distribution trough is provided at the bottom of each reaction chamber. The number of the water distribution units is the same as the number of the reaction chambers, and each water distribution unit is connected to the water distribution trough in the corresponding reaction chamber through a water inlet pipe.

[0014] Preferably, the reaction pool is a rectangular parallelepiped structure, and a plurality of partition plates are provided in the reaction pool. The partition plates are provided along the length direction of the reaction pool and separate the reaction pool into a plurality of reaction chambers.

[0015] Preferably, the water distribution system is welded or riveted or connected to the upper part of one side of the reaction tank by bolts.

[0016] Furthermore, it also includes a water outlet trough and an overflow trough respectively arranged in each reaction chamber. The water outlet trough is arranged at one end of the reaction pool, and each reaction chamber is respectively provided with an overflow hole. The overflow troughs are respectively connected to the water outlet trough through the corresponding overflow hole.

[0017] Furthermore, a second partition is provided in the water outlet trough, the second partition is provided with a water outlet hole, and an overflow weir is provided around the water outlet hole. The second partition divides the water outlet trough into two areas. A backwash wastewater pipe is connected to the bottom plate of the area close to the reaction tank side, and an outlet pipe is connected to the bottom plate of the other area for discharging treated wastewater.

[0018] Compared with the prior art, the water distribution system and biological filter device provided by the present invention have the following beneficial effects:

[0019] 1. This water distribution system has a compact structure and reasonable design. It can evenly distribute wastewater and arrange the wastewater evenly, and is conducive to the stable operation of the biological filter device.

[0020] 2. The biofilter device, including the water distribution system, can not only effectively adjust the wastewater treatment volume but also facilitate backwashing.

[0021] 3. This biological filter device is made of steel structure, which has a simpler structure and does not require on-site construction. It not only has the characteristics of short construction period and smaller footprint, but also is easy to assemble in modules, which is conducive to transfer and movement. It is especially suitable for black and smelly river treatment and municipal sewage emergency interception and treatment.

[0022] 4. This biological filter device is equipped with two sets of gas distribution devices to configure process gas and backwash gas for the reaction tank respectively, so that the gas volume of process gas and backwash gas can be controlled separately. This can not only effectively avoid the problems of uneven gas distribution, too little or too much gas volume, etc. in the existing technology, but also avoid affecting the growth and shedding of the biofilm of the biological filter, so that this non-clogging aerated biological filter device has better wastewater treatment effect and treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1This is a top view of a water distribution system provided in Example 1 of the present invention.

[0025] Figure 2 This is a top view of another water distribution system provided in Example 1 of the present invention.

[0026] Figure 3 This is a front view of a biological filter device provided in Example 1 of the present invention.

[0027] Figure 4 for Figure 3 Partial top view.

[0028] Figure 5 for Figure 3 Partial left view of .

[0029] Figure 6 This is a partial top view of the bottom of a biological filter device provided in Example 1 of the present invention.

[0030] Figure 7 This is a cross-sectional view of a single reaction chamber in a biological filter device provided in Example 1 of the present invention.

[0031] Figure 8 This is a schematic cross-sectional view of the filter brick layer in a biological filter device provided in Example 1 of the present invention. It can be seen that the first branch pipe and the second branch pipe are arranged in an alternating manner.

[0032] Figure 9 This is a schematic cross-sectional view of the overflow tank in a biological filter device provided in Example 1 of the present invention.

[0033] Figure 10 This is a side view of the connection between the trough plate and the outlet weir plate in a biological filter device provided in Example 1 of the present invention.

[0034] Description of the marks in the figure

[0035] Reaction pool 100, side wall 101 of the reaction pool, partition plate 102, reaction chamber 103,

[0036] Main water distribution channel 201, water distribution unit 202, water flow channel 202, water distribution channel 203, water inlet weir plate 204, opening 205, first partition plate 206, water inlet pipe 208, water distribution channel 209, water distribution cover plate 210, support component 211, first water inlet channel 212, second water inlet channel 213, baffle 214, water inlet hole 215,

[0037] Filter brick layer 301, filter brick 302,

[0038] Overflow trough 401, trough plate 402, water outlet weir plate 403, strip hole 404, overflow port 405, bolt 406,

[0039] Outlet trough 501, second partition 502, outlet hole 503, overflow weir 504, outlet pipe 505, backwash waste water pipe 506, valve 507,

[0040] Filler 601,

[0041] Process gas main pipe 701, first main pipe 702, first branch pipe 703, first joint 704, second joint 705,

[0042] Backwash gas main pipe 801, second main pipe 802, second branch pipe 803. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] See also Figure 3 、 Figure 4 and Figure 5 In this embodiment, a biological filter device is provided, including a water distribution system and a reaction tank 100. The water distribution system is arranged in the reaction tank 100. The water distribution system includes a main water distribution channel 201 and a plurality of water distribution units 202. Each of the water distribution units 202 is respectively connected to the main water distribution channel 201. A plurality of reaction chambers 103 are arranged in the reaction tank 100. A water distribution trough 209 is respectively arranged at the bottom of each reaction chamber 103. The number of the water distribution units 202 is the same as the number of the reaction chambers 103, and each water distribution unit 202 is respectively connected to the water distribution trough 209 in the corresponding reaction chamber 103 through a water inlet pipe 208. The water distribution system is used to evenly distribute the wastewater to be treated and input it into the corresponding reaction chamber 103, so as to achieve the purpose of evenly distributing the water, which is more conducive to treating the wastewater.

[0046] As an example, in this embodiment, the reaction tank 100 adopts a rectangular structure, and a plurality of partition plates 102 are arranged in the reaction tank 100. The partition plates 102 are arranged along the length direction of the reaction tank 100, and separate a plurality of reaction chambers 103 in the reaction tank 103. Each reaction chamber 103 is used for separate wastewater treatment, which is beneficial to improve the treatment effect.

[0047] like Figure 4 As shown, in this solution, each reaction chamber 103 is respectively provided with a filter brick layer 301 and a filler 601, and the filler 601 is arranged above the filter brick layer 301 to purify wastewater; the number of water distribution troughs 209 in each reaction chamber 103 can be determined according to actual needs. For example, in this embodiment, a water distribution trough 209 is respectively provided at the middle position of the bottom of each reaction chamber 103, and the water distribution trough 209 is arranged along the length direction of the reaction chamber 103. When multiple water inlet pipes 208 are provided, each water inlet pipe 208 is respectively connected to a different position on the side of the water distribution trough 209, and a plurality of water distribution cover plates 210 are provided on the top of the water distribution trough 209, and a water gap is provided between two adjacent water distribution cover plates 210, which can be used for overflow wastewater and effectively prevent blockage.

[0048] like Figure 3 、 Figure 5 As shown, to facilitate supporting the filler 601, in a further embodiment, support members 211 are provided on both sides of the water distribution trough 209, and the upper surfaces of the support members 211 are flush with the upper surface of the water distribution cover plate 210. This provides the bottom of the reaction chamber 103 with a regular surface, which not only facilitates the installation of the filter brick layer 301 but also allows for relatively uniform bearing of the pressure of the filter brick layer 301 and the filler 601 above the filter brick layer 301, thereby achieving stable support for the filter brick layer 301 and the filler 601 above the filter brick layer 301.

[0049] In a preferred embodiment, the support component 211 can be a concrete structure or a steel frame structure, and the steel frame structure includes a support frame and a support plate arranged on the top of the support frame, and the upper surface of the support plate is flush with the upper surface of the water distribution cover plate 210; it can be understood that when the support component 211 adopts a steel frame structure, there should be a good sealing effect between the support plate and the side wall of the reaction chamber 103 and the water distribution trough 209, such as using welding to achieve sealing, so as to effectively prevent the wastewater to be treated from flowing to the bottom of the support plate and forming stagnant water.

[0050] In order to facilitate the uniform distribution of water, in a preferred embodiment, the water uniform distribution unit 202 includes a water trough 202 and water uniform distribution troughs 203 arranged on both sides of the water trough 202, and a water inlet weir plate 204 is provided between the water trough 202 and the water uniform distribution trough 203. Figure 1As shown, in order to maintain the height of the wastewater so that the wastewater can enter the reaction tank 100 smoothly and evenly, one end of the water trough 202 is connected to the main water distribution channel 201, and the two water distribution troughs 203 in the same water distribution unit 202 are respectively used to connect to the same reaction tank 100. Specifically, in this embodiment, the two water distribution troughs 203 in the same water distribution unit 202 are respectively used to connect to the same reaction chamber 103 in the same reaction tank 100, as shown in FIG. Figure 4 and Figure 5 As shown, the bottom of each water distribution trough 203 is respectively provided with an opening 205 for connecting to the water inlet pipe 208. The two openings 205 of the same water distribution unit 202 are respectively connected to the water distribution trough 209 in the corresponding reaction chamber 103 through two water inlet pipes 208, and are connected at different positions of the water distribution trough 209, which is more conducive to uniform distribution of water.

[0051] In another preferred embodiment, the main water distribution channel 201 and the water distribution unit 202 may be an integrated structure. Figure 2 、 Figure 3 and Figure 4 As shown, in one embodiment, the main water distribution channel 201 is divided into a first water inlet trough 212 and a second water inlet trough 213 by a first partition 206, and a plurality of baffles 214 are provided in the second water inlet trough 213 for dividing the second water inlet trough 213 into a plurality of water body uniform distribution units 202, and the first partition 206 is provided with a plurality of water inlet holes 215, and the water inlet holes 215 are respectively connected to the water body uniform distribution units 202, so that wastewater can enter the water body uniform distribution units 202 in the second water inlet trough 213 through the first water inlet trough 212 and the water inlet holes 215 of the main water distribution channel 201, so as to evenly distribute the wastewater, which is beneficial to the uniform distribution of the water body, so as to achieve better wastewater treatment effect.

[0052] like Figure 2 、 Figure 4As shown, in a preferred embodiment, water inlet weir plates 204 are respectively provided in each water uniform distribution unit 202 and on both sides of the water inlet hole 215. The two water inlet weir plates 204 separate the water uniform distribution unit 202 into a water flow trough 202 and water uniform distribution troughs 203 respectively located on both sides of the water flow trough 202, and the bottom of the water uniform distribution trough 203 is respectively provided with an opening 205 for connecting the water inlet pipe 208. With such a design, on the one hand, the gravity of the wastewater itself can be utilized to make the wastewater enter the reaction chamber 103 evenly; on the other hand, after the wastewater enters the first water inlet trough 212, the flow of the wastewater can be made smoother, and it can flow out smoothly and evenly through the water inlet weir 204. In addition, the height of the water inlet weir 204 is certain, so that the liquid level height between the end of the second water inlet trough 213 and the corresponding water inlet weir 204 is relatively stable, so that the wastewater can enter the reaction chamber 103 more evenly through the corresponding water inlet pipe 208, and two water inlet pipes 208 are used to supply water, and the wastewater is drained to different positions of the reaction chamber 103, thereby achieving the purpose of evenly distributing the wastewater.

[0053] In a preferred embodiment, the water distribution system can be connected to the upper portion of one side of the reaction tank 100 by welding, riveting or bolts 406, such as Figure 3 As shown, wastewater is fed into the reaction tank 100 by gravity.

[0054] In this embodiment, the water distribution system, the water outlet trough 501, the overflow trough 401 and the reaction tank 100 can all be made of steel structures instead of concrete structures. The remaining components that need to be installed in the reaction tank 100 are integrated into the reaction tank 100 to form an integrated structure, so that the biological filter device does not need to be constructed on site. It not only has the characteristics of a short construction period and a smaller footprint, but also is easy to modularize and assemble, which is conducive to transfer and movement. It is particularly suitable for black and smelly river treatment and municipal sewage emergency interception and treatment.

[0055] In a preferred embodiment, the present invention further comprises an outlet trough 501 and an overflow trough 401 respectively arranged in each reaction chamber 103. The outlet trough 501 is arranged at one end of the reaction tank 100 and is parallel to the main water distribution channel 201. Each reaction chamber 103 is respectively provided with an overflow hole, and each overflow trough 401 is connected to the outlet trough 501 through the corresponding overflow hole. The wastewater treated in the reaction chamber 103 can overflow into the overflow trough 401 and enter the outlet trough 501 along the overflow trough 401, so that the treated wastewater can be smoothly output from the biological filter device.

[0056] To improve water discharge efficiency, Figure 4As shown, in a further solution, each reaction chamber 103 includes two overflow troughs 401, and the two overflow troughs 401 are respectively arranged on both sides of the reaction chamber 103 (arranged between the partition plate 102 and the partition plate 102, or the partition plate 102 and the side wall 101 of the reaction tank), so as to effectively improve the wastewater treatment efficiency.

[0057] In a preferred embodiment, at least one side wall of the overflow trough 401 is a water outlet weir plate 403 or is provided with a water outlet weir plate 403. For example, Figure 9 and Figure 10 As shown, in this embodiment, the overflow trough 401 is surrounded by the side wall of the reaction chamber 103 (the partition plate 102 or the side wall 101 of the reaction tank) and the trough plate 402 welded to the side wall, and the top of the trough plate 402 is arranged at the overflow port 405 or the trough plate 402 is connected to the height-adjustable water outlet weir plate 403; in this embodiment, the trough plate 402 is arranged along the length direction of the reaction chamber 103, the trough plate 402 is provided with a through hole, the water outlet weir plate 403 is provided with a strip hole 404, and the top of the water outlet weir plate 403 is provided with an overflow port 405, and the trough plate 402 and the water outlet weir plate 403 are connected by bolts 406, which can effectively adjust the height of the water outlet weir plate 403, thereby achieving the purpose of adjusting the water outlet height, which is beneficial to adjust the wastewater volume of the entire reaction tank 100.

[0058] To facilitate backwashing, in a further solution, a second partition 502 is provided in the outlet trough 501, and the second partition 502 is provided with an outlet hole 503. An overflow weir plate 504 is provided around the outlet hole 503. The second partition 502 divides the outlet trough 501 into two areas. A backwash wastewater pipe 506 is connected to the bottom plate of the area close to the reaction tank 100, and an outlet pipe 505 is connected to the bottom plate of the other area for discharging treated wastewater. Figure 3 、 Figure 4 As shown, in this embodiment, a valve 507, such as an electromagnetic valve 507, is provided on the backwash wastewater pipe 506. When backwashing is not performed, the valve 507 is in a closed state, so that the purified wastewater (clean water) overflowing from the reaction chamber 103 can be discharged through the outlet pipe 505. When backwashing is performed, the valve 507 is in an open state, so that the backwash wastewater overflowing from the reaction chamber 103 can be directly discharged from the reaction chamber 103 through the backwash wastewater pipe 506 under the blocking effect of the overflow weir plate 504. Since the backwash wastewater is contaminated and cannot be discharged directly, it needs to be treated. Therefore, the backwash wastewater pipe 506 is usually connected to the main distribution channel 201, so that the backwash wastewater can be conveniently input into the main distribution channel 201 for subsequent wastewater treatment.

[0059] In this embodiment, each reaction chamber 103 is further provided with a first gas distribution device for arranging process gas, so as to provide the process gas (i.e., aeration) required by the microorganisms to the reaction chamber 103, so that the reaction chamber 103 can operate normally and achieve purification of wastewater; for example, Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the first gas distribution device includes a process gas main pipe 701 and a process gas uniform distribution device, the process gas uniform distribution device includes a first main pipe 702 and a plurality of first branch pipes 703, one end of each first branch pipe 703 is respectively connected to the first main pipe 702, and the other end is respectively closed, and a plurality of first air holes are provided on the side of the first branch pipe 703. The process gas input from the blower passes through the first main pipe 702 and the first branch pipe 703 in sequence, and enters the reaction chamber 103 through the first air holes of the first branch pipe 703 respectively, so that the process gas can be evenly distributed on the cross section of the process gas uniform distribution device in the reaction chamber 103; the lower end of the process gas main pipe 701 is connected to the first main pipe 702, and the upper end of the process gas main pipe 701 is used to connect to the gas supply equipment or the gas supply pipeline. The first gas distribution device can be used to separately control the amount of process gas, as shown in FIG. Figure 7 and Figure 8 As shown, in this embodiment, the process gas uniform distribution device is arranged below the filter brick layer 301.

[0060] In this embodiment, each reaction chamber 103 is further provided with a second gas distribution device for providing backwashing gas, so as to regularly backwash the filler 601, so that the reaction chamber 103 can maintain a high efficiency of wastewater treatment; for example, Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the second gas distribution device includes a backwash gas main pipe 801 and a backwash gas uniform distribution device, the backwash gas uniform distribution device includes a second main pipe 802 and a plurality of second branch pipes 803, one end of each second branch pipe 803 is respectively connected to the second main pipe 802, and the other end is respectively closed, and a plurality of second air holes are provided on the side of the second branch pipe 803. The backwash gas input from the blower passes through the second main pipe 802 and the second branch pipe 803 in sequence, and enters the reaction chamber 103 through the second air holes of the second branch pipe 803 respectively, so that the backwash gas can be evenly distributed on the cross section of the backwash gas uniform distribution device in the reaction chamber 103; the lower end of the backwash gas main pipe 801 is connected to the second main pipe 802, and the upper end of the backwash gas main pipe 801 is used to connect to the gas supply equipment or the gas supply pipeline. The second gas distribution device can be used to separately control the process gas volume, such as Figure 7 and Figure 8 As shown, in this embodiment, the process gas uniform distribution device is arranged below the filter brick layer 301.

[0061] In order to make the process gas and the backwash gas more evenly distributed in the reaction chamber 103, in the preferred solution provided in this embodiment, the process gas uniform distribution device and the backwash gas uniform distribution device are arranged in an interlaced manner, so that the gas discharged from the process gas uniform distribution device and the backwash gas uniform distribution device can be evenly distributed. Figure 7 and Figure 8 As shown, in this embodiment, two sets of gas distribution devices are provided to configure process gas and backwash gas for the reaction chamber 103 respectively, so as to control the gas volume of the process gas and the gas volume of the backwash gas separately. This can effectively avoid the problems of uneven gas distribution, too little or too much gas volume, etc. in the prior art, avoid affecting the growth and shedding of the biofilm of the biological filter, so that the biological filter device has better wastewater treatment effect and treatment efficiency.

[0062] It can be understood that the air supply equipment can be a blower commonly used in the prior art. The first air distribution device and the second air distribution device can be connected to two blowers respectively, or they can be connected to the same blower. When using a blower, a control valve, such as a three-way valve, is also required to control the air delivery direction.

[0063] Since there is a large difference between the amount of process gas required and the amount of backwash gas required during the wastewater treatment process, the size and number of the first air holes on the first branch pipe 703 and the size and number of the second air holes on the second branch pipe 803 can be different, so as to meet the different requirements of the amount of process gas and the amount of backwash gas, thereby effectively avoiding the problems of uneven gas distribution, too little or too much gas volume when using the same set of gas distribution devices, affecting the growth and shedding of the biofilm of the biological filter, and thus affecting the treatment effect.

[0064] To facilitate connection and installation, in a preferred embodiment, both ends of the first main pipe 702 and the second main pipe 802 are sealed, and the sides of the first main pipe 702 and the second main pipe 802 are each provided with a first joint 704 and a plurality of second joints 705. The first joint 704 is used to connect to the process gas main pipe 701 or the backwash gas main pipe 801, and the second joint 705 is used to connect to each first branch pipe 703 or each second branch pipe 803. It is understood that the first joint 704 and the second joint 705 can respectively adopt commonly used pipe joints in the prior art, such as flange joints, which will not be described in detail here.

[0065] To make the structure of the non-clogging biological aerated filter device more compact and the layout more reasonable, in a preferred embodiment, the first main pipe 702 and the second main pipe 802 are respectively arranged on both sides of the reaction chamber 103 to facilitate pipe connection during assembly; the first branch pipes 703 and the second branch pipes 803 are alternately distributed, that is, the first branch pipes 703 and the second branch pipes 803 can be staggered with each other, so that the first branch pipes 703 and the second branch pipes 803 are alternately distributed.

[0066] In this embodiment, the process gas uniform distribution device and the backwash gas uniform distribution device are respectively arranged above the water distribution tank 209 and the support member 211, and the filter brick layer 301 is assembled from a plurality of adjacently arranged filter bricks 302. The filter brick layer 301 is arranged above the process gas uniform distribution device and the backwash gas uniform distribution device. Figure 3 and Figure 7 As shown, the gas discharged from the first branch pipe 703 and the second branch pipe 803 can move upward through the gap between the two adjacent filter bricks 302 in the filter brick layer 301. Such a design, on the one hand, is conducive to more uniform gas distribution, and on the other hand, can effectively prevent blockage. The filler 601 can be directly set on the filter brick layer 301.

[0067] The process of water distribution using the biofilter device provided in this embodiment is as follows: wastewater enters the first water inlet trough 212 of the main water distribution channel 201 through the lifting pump, and enters the second water inlet trough 213 through the water inlet hole 215, and then passes through the water distribution unit 202 and the water inlet pipe 208 into the water distribution trough 209 at the bottom of the reaction chamber 103 to achieve uniform distribution of the water body, and then overflows upward through the water gap between the two adjacent water distribution cover plates 210 and enters the bottom of the filter brick layer 301, and passes through each filter brick 302 in the filter brick layer 301. The wastewater overflows upward through the gap between the fillers 601, and then continues to overflow upward and passes through the filler 601, and enters the overflow trough 401 and the outlet trough 501 in turn. When backwashing is not performed, the valve 507 set on the backwash wastewater pipe 506 is closed, and the purified wastewater can enter the outlet pipe 505 through the outlet hole 503 and the overflow weir plate 504, and be discharged through the outlet pipe 505; if backwashing is performed, the valve 507 set on the backwash wastewater pipe 506 is opened, and the backwash wastewater can be discharged through the backwash wastewater pipe 506.

[0068] The process for configuring process gas (i.e., aeration) using the biofilter device provided in this embodiment is as follows: under the action of the blower, the process gas enters the first main pipe 702 through the process gas main pipe 701, and simultaneously enters each first branch pipe 703 through the first main pipe 702. Finally, it evenly enters the bottom of the filter brick layer 301 in the reaction chamber 103 through the first air holes on each first branch pipe 703. Thereafter, the process gas moves upward through the gaps between the filter bricks 302 in the filter brick layer 301, and finally passes through the filler 601 and is discharged from the reaction chamber 103. In this process, the purpose of providing nutrition for the microorganisms in the reaction chamber 103 is achieved.

[0069] Similarly, the process of configuring backwash gas using the biological filter device provided in this embodiment is as follows: under the action of the blower, the backwash gas enters the second main pipe 802 through the backwash gas main pipe 801, and simultaneously enters each second branch pipe 803 through the second main pipe 802, and finally enters the bottom of the filter brick layer 301 in the reaction chamber 103 through the second air holes on each second branch pipe 803. Then, the backwash gas moves upward through the gaps between the filter bricks 302 in the filter brick layer 301, and finally passes through the filler 601 and is discharged from the reaction chamber 103, and in this process, the purpose of flushing the filler 601 is achieved.

[0070] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A biological filter device, characterized in that: It includes a water distribution system and a reaction tank. The water distribution system is arranged in the reaction tank. The water distribution system includes a main water distribution channel and a plurality of water distribution units. Each water distribution unit is respectively connected to the main water distribution channel. The water distribution units are respectively used to evenly distribute the wastewater and input the wastewater into the reaction tank respectively. The reaction tank is equipped with several reaction chambers, each with a water distribution trough at the bottom. Each water distribution unit is connected to the water distribution trough in the corresponding reaction chamber through a water inlet pipe. A water distribution cover is provided on the top of the water distribution trough, with a water flow gap between two adjacent water distribution cover plates. Support components are provided on both sides of the water distribution trough. Each reaction chamber is equipped with a filter brick layer and filler, and the filler is provided above the filter brick layer. Each reaction chamber is further provided with a first gas distribution device for arranging process gas and a second gas distribution device for providing backwash gas. The first gas distribution device includes a process gas uniform distribution device, and the second gas distribution device includes a backwash gas uniform distribution device. The process gas uniform distribution device and the backwash gas uniform distribution device are arranged alternately. The process gas uniform distribution device and the backwash gas uniform distribution device are respectively arranged above the water distribution tank and the supporting component. The filter brick layer is assembled from a number of adjacent filter bricks, with gaps between adjacent filter bricks. The filter brick layer is arranged above the process gas uniform distribution device and the backwash gas uniform distribution device. It also includes a water outlet trough and an overflow trough respectively arranged in each reaction chamber, the water outlet trough is arranged at one end of the reaction pool, each reaction chamber is respectively provided with an overflow hole, and each overflow trough is respectively connected to the water outlet trough through the corresponding overflow hole; the overflow trough is surrounded by the side wall of the reaction chamber and a trough plate welded to the side wall, and the trough plate is connected to a height-adjustable water outlet weir plate, the trough plate is arranged along the length direction of the reaction chamber, the trough plate is provided with a through hole, the water outlet weir plate is provided with a strip hole, and the top of the water outlet weir plate is provided with an overflow port, and the trough plate and the water outlet weir plate are connected by bolts; A second partition is provided in the water outlet trough, and the second partition is provided with a water outlet hole. An overflow weir plate is provided around the water outlet hole. The second partition divides the water outlet trough into two areas. A backwash wastewater pipe is connected to the bottom plate of the area close to the reaction tank side. An electromagnetic valve is provided on the backwash wastewater pipe. The backwash wastewater pipe is connected to the main distribution channel. An outlet pipe is connected to the bottom plate of the other area for discharging treated wastewater.

2. The biofilter device according to claim 1, characterized in that The water distribution unit includes a water trough and water distribution troughs arranged on both sides of the water trough. An inlet weir plate is arranged between the water trough and the water distribution trough. One end of the water trough is connected to the main water distribution channel. The two water distribution troughs in the same water distribution unit are respectively used to connect to the same reaction tank.

3. The biofilter device according to claim 2, characterized in that: The bottoms of the water uniform distribution troughs are respectively provided with openings for connecting water inlet pipes.

4. The biofilter device according to claim 1, characterized in that The main water distribution channel and the water distribution unit are an integrated structure.

5. The biofilter device according to claim 4, characterized in that: The main water distribution channel is divided into a first water inlet trough and a second water inlet trough by a first partition. Several baffles are provided in the second water inlet trough for dividing the second water inlet trough into several water evenly distributed units. The first partition is provided with several water inlet holes, and each water inlet hole is respectively connected to the water evenly distributed unit.

6. The biofilter device according to claim 5, characterized in that: Water inlet weir plates are respectively provided in each water distribution unit and on both sides of the water inlet hole. The two water inlet weir plates separate the water distribution unit into a water flow trough and water distribution troughs respectively located on both sides of the water flow trough, and the bottoms of the water distribution troughs are respectively provided with openings for connecting water inlet pipes.

7. The biofilter device according to claim 1, characterized in that: The number of water uniform distribution units is the same as the number of reaction chambers.

8. The biofilter device according to claim 1, characterized in that: The reaction pool is a rectangular parallelepiped structure. A plurality of partition plates are provided in the reaction pool. The partition plates are provided along the length direction of the reaction pool and separate the reaction pool into a plurality of reaction chambers.

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