CN212269815U

CN212269815U - Sewage denitrification device

Info

Publication number: CN212269815U
Application number: CN202021827868.6U
Authority: CN
Inventors: 徐云倩
Original assignee: Sichuan Bihai Cuite Environmental Intelligent Technology Co ltd
Current assignee: Sichuan Bihai Cuite Environmental Intelligent Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-01-01
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a sewage denitrification device, which relates to the technical field of sewage treatment and comprises a barrel, wherein a partition plate and a partition plate frame are arranged in the barrel, the inner cavity of the barrel is divided into a reaction area and a filtering area by the partition plate, the partition plate frame is arranged in the reaction area, an aerobic reaction area is formed between the partition plate frame and the partition plate, an anoxic reaction area is formed between the partition plate frame and the inner wall of the barrel, and the height of the partition plate frame is lower than that of the partition plate; the aeration device is used for aerating only one area of the aerobic reaction area and simultaneously driving sewage below the anoxic reaction area to flow to the aerobic reaction area from the lower part of the anoxic reaction area. The device has good sewage treatment effect, small occupied area and low operation energy consumption, can efficiently treat small-scale domestic sewage, and can also be applied to the advanced treatment process of the effluent of a conventional sewage treatment device so as to realize the upgrading and upgrading of the existing sewage treatment plant (station).

Description

Sewage denitrification device

Technical Field

The utility model relates to a sewage treatment technical field specifically is a sewage denitrification device.

Background

The problem of water resources becomes one of the important factors restricting the economic development of China. With the continuous development of economy and the continuous improvement of living standard of people, the direct discharge of domestic sewage into rivers and lakes will cause serious pollution to water bodies. Therefore, a normalized water pollution prevention and control supervision mechanism is established in China, the water quality index of the discharged water after domestic sewage treatment is required to be in accordance with the current national standard (GB 18918-2012), and the highest allowable discharge concentration (daily average) of the basic control project is as follows: COD 50mg/L, BOD₅10mg/L、SS 10mg/L、TN 15mg/L、NH₃N5 (8) mg/L, TP 0.5.5 mg/L, PH value 6-9. In particular, some provinces and cities also issue more strict local standards, such as DB 51/2311-2016 in Sichuan province, and the emission index of main pollutants of the provinces and cities reaches the standard of surface water IV class.

The existing sewage treatment process mainly adopts biochemical treatment, and the method mainly comprises the following steps: oxidation ditch method, SBR method, CASS method, activated sludge method, and the like. Due to the limitation of the technological process and the operation difficulty, the comprehensive standard reaching of the indexes of the discharged water is difficult to realize, wherein TP and TN indexes often have standard exceeding risks, and the risk that the TP exceeds the standard can be reduced to a certain extent even after the physical and chemical method is added for removing phosphorus, so that the problem that the TN exceeds the standard cannot be solved. In view of the current operation condition of the sewage plant, TN is a limiting factor for restricting the pollutant discharge of the sewage plant to reach the standard, so that the deep bed denitrification filter, the artificial wetland and other processes specially used for the advanced treatment of the biochemical effluent of the sewage plant appear. The deep bed denitrification filter tank needs to artificially supplement a carbon source, has strict requirements on operation, not only greatly increases the treatment cost of a sewage plant, but also brings the risk of COD exceeding caused by excessive carbon source addition; the artificial wetland is a better advanced treatment process, but still has the problems of large floor area, easy blockage, poor operation effect in winter and the like.

In addition, the existing large-scale sewage treatment equipment has the advantages of high price, complex structure, large occupied area and high technical requirements on operation and maintenance personnel, and is not suitable for treating small-scale sewage such as rural domestic sewage and the like. Especially, in the vast rural areas of China, large-scale sewage treatment facilities are not constructed under the condition, the sewage in the rural areas is mainly discharged directly, or the sewage is subjected to simple purification treatment before being discharged, so that the pollution of the discharged sewage to water resources is serious. Therefore, the development of a process device which can efficiently treat small-scale domestic sewage or further deeply treat the effluent of the original sewage treatment system to reduce TN is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a sewage denitrification device, and its sewage treatment is effectual, and area is little simultaneously, and the running cost is low, can carry out high-efficient treatment to small-scale domestic sewage, can also be applied to the advanced treatment technology that conventional sewage treatment plant goes out water to realize the upgrading of proposing of current sewage treatment plant (station).

The purpose of the utility model is realized through the following technical scheme:

a sewage denitrification device comprises a barrel, wherein a partition plate and a partition plate frame are arranged in the barrel, the partition plate divides an inner cavity of the barrel into a reaction zone and a filtering zone, the partition plate frame is arranged in the reaction zone, an aerobic reaction zone is formed between the partition plate frame and the partition plate, an anoxic reaction zone is formed between the partition plate frame and the inner wall of the barrel, and the height of the partition plate frame is lower than that of the partition plate;

the aeration device is used for aerating only one area of the aerobic reaction zone and is also used for driving sewage below the anoxic reaction zone to flow to the aerobic reaction zone from the lower part of the anoxic reaction zone.

Further, when the numerical ratio of COD to TN in the sewage to be treated is more than or equal to 10 and less than 20, the ratio of the volume of the aerobic reaction zone to the volume of the anoxic reaction zone is more than or equal to 3 and less than 4; when the numerical ratio of COD to TN in the sewage to be treated is more than or equal to 5 and less than 10, the ratio of the volume of the aerobic reaction zone to the volume of the anoxic reaction zone is more than or equal to 2 and less than 3; and when the numerical ratio of COD to TN in the sewage to be treated is less than 5, the ratio of the volume of the aerobic reaction zone to the volume of the anoxic reaction zone is more than or equal to 1 and less than 2.

Further, still include the sewage inlet tube, the one end of sewage inlet tube stretches into in the barrel and be located the top in oxygen deficiency reaction zone, the sewage inlet tube is used for leading sewage to oxygen deficiency reaction zone.

The carbon source supplementing system comprises a TN (twisted nematic) online monitor, a controller, a carbon source supplementing device and a carbon source inlet pipe, wherein the TN online monitor is used for detecting the total nitrogen value of sewage entering the sewage inlet pipe, the carbon source supplementing device is communicated with the sewage inlet pipe through the carbon source inlet pipe, and the controller is electrically connected with the TN online monitor and the carbon source supplementing device respectively.

Furthermore, the aeration device comprises an aeration pipe and an aeration disc, the aeration disc is arranged under the aerobic reaction zone, a plurality of aeration holes are formed in the direction of the aeration disc, which is over against the aerobic reaction zone, and one end of the aeration pipe is communicated with the aeration disc.

Furthermore, the aeration pipe is provided with a control valve, the control valve is used for controlling the size of airflow in the aeration pipe, the aeration pipe further comprises a controller and a dissolved oxygen probe, the dissolved oxygen probe is used for detecting the dissolved oxygen content of the middle upper part of the aerobic reaction zone and the middle lower part of the anoxic reaction zone, and the controller is respectively in electrical connection with the dissolved oxygen probe and the control valve.

Furthermore, a plurality of filtering devices are arranged in the filtering area, each filtering device comprises an arc-shaped frame body and a piece of filter cloth, and the filter cloth is arranged outside the frame body in a wrapping mode to enable the filtering devices to be of a closed hollow structure;

the water outlet pipe is used for communicating the inner cavities of the filtering devices with the outside of the cylinder.

Furthermore, a backflushing pipeline is arranged on the filtering device, one end of the backflushing pipeline is communicated with the inner cavity of the filtering device, a valve is arranged at the other end of the backflushing pipeline in a communicated mode, and the other end of the valve is communicated with the aeration pipe.

Further, still include the mud collection cabin of toper structure, the mud collection cabin set up in the below of barrel, the big diameter end in mud collection cabin with the bottom sealing connection of barrel.

Furthermore, a plurality of anoxic microbial fillers are filled in the anoxic reaction zone, a plurality of aerobic microbial fillers are filled in the aerobic reaction zone, the aerobic microbial fillers are rope-shaped fillers, the aerobic microbial fillers are uniformly distributed in parallel along the axial direction of the aerobic reaction zone, the anoxic microbial fillers are curtain-shaped fillers, and the anoxic microbial fillers are uniformly distributed outside the aerobic reaction zone in a divergent manner.

The utility model has the advantages that:

the biomembrane process sewage denitrification device comprises a barrel and an aeration device, wherein a filtering area, an aerobic reaction area and an anoxic reaction area are arranged in the barrel, aerobic microorganism fillers are filled in the aerobic reaction area, anoxic microorganism fillers are filled in the anoxic reaction area when the device is used, and a sludge collection bin is arranged at the bottom of the barrel to seal the bottom of the barrel. On one hand, the aeration device can aerate the aerobic reaction zone, provide enough nutrients for the aerobic microbial filler and enhance the decomposition efficiency of the aerobic microbial filler; on the other hand, sewage below the anoxic reaction zone can be driven by the aeration airflow to flow to the aerobic reaction zone from the lower part of the anoxic reaction zone, so that the sewage forms internal circulation flow between the aerobic reaction zone and the anoxic reaction zone in the device, the volume of the device can be effectively reduced, the occupied area is saved, and the sewage treatment effect is improved.

The specific volume ratio of the aerobic reaction zone to the anoxic reaction zone is customized according to the ratio of COD to TN of the inlet water, so that the aerobic reaction process and the anoxic reaction process of the sewage in the equipment are more reasonably distributed, the sewage treatment effect is effectively improved, the space in the equipment is effectively utilized, and the characteristics of small volume and small occupied area of the equipment are kept. Meanwhile, equipment with different specifications (volume ratio) corresponds to different specific sewage environments, so that the equipment is closer to an actual application scene, and the equipment has higher practical industrial value.

The aerobic microbial packing of rope form is evenly distributed along the axial direction of the aerobic microbial packing in the aerobic reaction zone in parallel, and the anoxic microbial packing of the divergence-shaped evenly distributed curtain form is formed outside the aerobic reaction zone, so that sewage can be fully contacted with the aerobic microbes or the anoxic microbes on the one hand, and on the other hand, the sewage has a better flow state when flowing in an internal circulation manner, and the sewage treatment effect is effectively ensured.

Set up controller and dissolved oxygen probe, set up the control valve on the aeration equipment, the dissolved oxygen probe can survey the dissolved oxygen concentration in good oxygen reaction zone and oxygen deficiency reaction zone in real time, then automatic control aeration equipment air current size guarantees that good oxygen microorganism is in suitable oxygen content environment all the time, guarantees better sewage treatment effect.

The filtering device is arranged to filter the discharged sewage, so that impurities in the sewage can be effectively removed, and the quality of the discharged water is ensured. This filter equipment chooses for use to wrap up in the hollow filter box structure of covering the filter cloth by the framework to through the direct aeration pipe intercommunication with aeration equipment of recoil pipeline, when filter equipment takes place to block up, monitor filter pressure, when pressure exceeded the setting value, the solenoid valve was opened automatically, directly utilized aeration pipeline's air current to carry out the recoil, can effectively guarantee filtration efficiency.

The sludge collection bin at the bottom of the barrel is of an inverted cone structure, so that on one hand, impurities such as precipitated sludge can be guided to the bottom of the small-diameter end of the sludge collection bin, and the impurities can be conveniently discharged by a sludge discharge valve; on the other hand, the inner cone surface of the sludge collecting bin forms certain guiding and flow blocking effects on the bottom of the anoxic reaction area, and sewage flowing down from the anoxic reaction area flows to the aeration device at the central position under the guiding effect of the inner cone surface, so that the sewage is conveniently brought up by the airflow of the aeration device, and the internal circulation sewage treatment process is better realized.

Set up the sewage inlet tube and evenly lead to the oxygen deficiency reaction zone with sewage to set up carbon source complementary system and sewage inlet tube intercommunication, through the COD of real-time detection intaking or play water and the content of TN, automatically to sewage inlet tube supplemental carbon source, make the system reach the optimal carbon nitrogen ratio, be favorable to the facultative microorganisms to carry out the denitrification better, take place synchronous nitrification denitrification in the biomembrane simultaneously, reach the optimal TN and get rid of the effect, realize sewage discharge to reach standard.

In addition, the sewage denitrification device adopting the biomembrane method has the advantages of simple integral structure, convenient manufacture, realization of equipment production, convenient transportation, lower integral cost, high utilization rate of dissolved oxygen, no need of a nitrifying liquid reflux pump and a sludge reflux pump, and low operating cost. The device can be used independently, can also be applied in parallel, meets the sewage treatment requirements of different water qualities and different treatment requirements, and has wide application range. The device can also be applied to the advanced treatment process of the effluent of the conventional sewage treatment device so as to realize the upgrading and upgrading of the existing sewage treatment plant (station).

Drawings

FIG. 1 is a schematic view of the external structure of a sewage denitrification apparatus of the present invention;

FIG. 2 is a schematic view of a sectional structure of a sewage denitrification device of the present invention;

FIG. 3 is a schematic structural view of a cylinder in a sewage denitrification apparatus of the present invention;

FIG. 4 is a schematic view of a sectional structure of a sewage denitrification apparatus in a main view direction;

FIG. 5 is a schematic view of a side view of a sewage denitrification apparatus of the present invention;

FIG. 6 is a schematic view of the cross-sectional structure of the sewage denitrification apparatus in the overlooking direction.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1 to 3, a sewage denitrification apparatus includes a cylinder 100 and an aeration apparatus. A partition 110 and a partition frame 120 are provided in the cylinder 100. The partition 110 partitions the inner cavity of the cartridge 100 into a reaction zone and a filtration zone.

The partition plate frame 120 is formed by sequentially connecting a plurality of plates in a surrounding manner and is arranged in the reaction zone, the partition plate frame 120 is fixedly connected with the partition plate 110, and an aerobic reaction zone is formed between the partition plate frame 120 and the partition plate 110; an anoxic reaction zone is formed between the partition frame 120 and the inner wall of the cylinder 100.

The aeration device is used for aerating the aerobic reaction zone and simultaneously driving sewage below the anoxic reaction zone to flow to the aerobic reaction zone from the lower part of the anoxic reaction zone. Meanwhile, the height of the partition plate frame 120 in the arrangement is lower than that of the partition plate 110, so that internal circulation treatment of sewage can be realized when the sewage treatment device is used, and the sewage treatment efficiency is improved.

In practice, as shown in fig. 4 to 6, the aerobic reaction zone is filled with aerobic microorganism fillers 121, the anoxic reaction zone is filled with anoxic microorganism fillers 122, the bottom of the cylinder 100 is provided with a sludge collecting bin 500 to seal the bottom of the cylinder 100, and the filtering zone is provided with a filtering device 400.

During operation, sewage to be treated is added into the device from the upper part of the anoxic reaction zone, and the aeration device is in an aeration state to provide enough oxygen for the aerobic microorganism fillers 121 in the aerobic reaction zone so as to enhance the decomposition efficiency of the aerobic microorganism fillers. When the aeration device is used for aeration, under the driving of aeration airflow, sewage below the anoxic reaction zone flows into the aerobic reaction zone from the lower part of the aerobic reaction zone upwards, the sewage is decomposed and treated by aerobic microbial fillers 121 in the aerobic reaction zone when flowing through the aerobic microbial fillers, and then the sewage is pushed by the aeration airflow and the water flow in the aerobic reaction zone to pass over the top of the partition plate frame 120 and enter the anoxic reaction zone from the top of the anoxic reaction zone to be decomposed and treated by the anoxic microbial fillers 122. Therefore, the aeration device not only fully aerates the aerobic reaction zone, but also provides power through aeration airflow, so that sewage forms internal circulation flow between the aerobic reaction zone and the anoxic reaction zone in the device, the volume of equipment can be effectively reduced, and the sewage treatment effect is improved. In the above arrangement, since the height of the partition frame 120 is lower than that of the partition 110, the sewage cannot flow into the filtering area from the top under the blocking of the partition 110, thereby ensuring the smooth proceeding of the internal circulation treatment process of the sewage.

In specific implementation, the aerobic microbial filler 121 is a rope-shaped filler, and the anoxic microbial filler 122 is a curtain-shaped filler. In the aerobic reaction zone, a plurality of aerobic microorganism fillers 121 are uniformly distributed in parallel along the axial direction of the aerobic reaction zone; in the anoxic reaction zone, a plurality of the anoxic microorganism fillers 122 are distributed outside the aerobic reaction zone in a divergent manner. This sets up down, can make sewage and aerobic microorganism or anoxic microorganism fully contact, has better flow state when the sewage inner loop flows simultaneously, can effectively guarantee sewage treatment's effect.

As shown in fig. 2, 4 and 5, the aeration apparatus includes an aeration pipe 320 and an aeration plate 310. The aeration disc 310 is arranged under the aerobic reaction zone, a plurality of aeration holes are arranged in the direction of the aeration disc 310 facing the aerobic reaction zone, and one end of the aeration pipe 320 is communicated with the aeration disc 310. The aeration disc 320 can be a hollow disc-shaped structure with a plurality of aeration holes on the top surface, and in the embodiment, because the section of the aerobic reaction zone is rectangular, a plurality of parallel aeration branch pipes can be simply arranged for replacement. It should be noted that the shape of the aeration tray 320 is not limited, and the shape, size and installation position of the aeration tray are determined according to specific conditions during implementation, so as to ensure that the external air flows in through the aeration pipe 320, just aerates one area of the aerobic reaction zone when flowing out from the aeration holes on the aeration tray 310, and simultaneously can drive the sewage below the anoxic reaction zone to flow from the lower part of the anoxic reaction zone to the aerobic reaction zone.

In a specific implementation, a control valve (not shown) is disposed on the aeration pipe 320, and the control valve is used for controlling the magnitude of the airflow in the aeration pipe 320. The sewage denitrification device adopting the biomembrane method further comprises a controller and a dissolved oxygen probe, wherein the dissolved oxygen probe is used for detecting the dissolved oxygen content of the middle upper part of the aerobic reaction zone and the middle part of the anoxic reaction zone in real time, the optimal control of the dissolved oxygen is realized according to the COD and TN concentration of the inlet water, the optimal survival conditions are provided for microorganisms, the efficient nitrification and denitrification and the synchronous nitrification and denitrification are realized, and the stable standard water outlet effect is achieved. Specifically, the controller is respectively electrically connected with the dissolved oxygen probe and the control valve, and when the dissolved oxygen probe detects that the concentration of the dissolved oxygen is lower than a required value, the control valve adjusts the air flow in the aeration pipe 320 to be large under the action of the controller; on the contrary, when the dissolved oxygen concentration detected by the dissolved oxygen probe is too high, the controller automatically controls the control valve to reduce the airflow in the aeration pipe 320, so as to realize the optimal matching of the dissolved oxygen and the oxygen demand of the microorganism. This setting can be through the air current in the automatic adjustment aeration pipe 320, guarantee that the aerobic microorganism is in suitable oxygen content environment all the time, guarantee better sewage treatment effect.

A plurality of filtering devices 400 are arranged in the filtering area, a water outlet pipe 410 is arranged on the cylinder body 100, and the water outlet pipe 410 enables the filtering devices 400 to be communicated with the outside of the cylinder body 100. As shown in fig. 2 and 5, the lower part of the filtering area is communicated with the lower part of the reaction area, and after the sewage is subjected to the internal circulation reaction, a part of the sewage at the lower part of the reaction area flows into the filtering area from the lower part of the filtering area, is filtered by the filtering device 400 and is discharged by the water outlet pipe 410. In particular, the filter device 400 includes a frame and a filter cloth. The cylinder body 100 is cylindrical, the frame body is arc-shaped, and the frame body and the cylinder body 100 are concentrically arranged in the filtering area, so that the utilization rate of the space in the cylinder body 100 is improved, and the volume of equipment is reduced; the filter cloth is arranged outside the frame in a covering manner to enable the filtering device 400 to be in a closed hollow structure; the water outlet pipe 410 penetrates through the filtering device 400, and a plurality of water outlets are formed in the part of the water outlet pipe 410, which is located in the hollow inner cavity of the filtering device 400, so that the inner cavities of the filtering devices 400 are communicated with the outside of the barrel 100. The sewage flowing into the filtering area submerges the filtering device 400, impurities are retained outside the filtering device 400 and finally settle to the bottom of the sludge collecting bin 500 under the filtering action of the filter cloth, and the water after filtering treatment by the filter cloth flows into the inner cavity of the filtering device 400 and is discharged through the water outlet pipe 410.

Further, a backflushing pipeline 420 is further arranged on the filtering device 400, one end of the backflushing pipeline 420 is communicated with the inner cavity of the filtering device 400, the other end of the backflushing pipeline 420 is communicated with a valve 430, and the other end of the valve 430 is communicated with the aeration pipe 320. After the filtering device 400 is used for a period of time, part of impurities can adhere to the filter cloth to block the filter holes of the filter cloth, so that the filtering efficiency is affected, or the sewage can overflow from the top of the cylinder 100. At this time, the valve 430 may be opened, and gas may be blown into the filtering apparatus 400 through the aeration pipe 320 and the back flushing pipe 420, so as to back flush impurities such as sludge outside the filter cloth, thereby cleaning the blocked filter holes and ensuring the filtering efficiency. In specific implementation, the valve 430 can be an electric control valve, and the opening and closing of the electric control valve are controlled in a timing mode to achieve the function of automatically blowback and dredging the filter holes. Or a differential pressure gauge and a controller can be arranged, the differential pressure gauge is used for detecting the difference value between the water outlet pressure of the water outlet pipe 410 and the water pressure of a certain measuring point in the filtering area, and when the differential pressure is greater than a set value, the controller controls the valve 430 to be automatically opened, so that the automatic control of the back flushing dredging filtering hole is realized.

In specific implementation, the mud collecting bin 500 is of a conical structure, the mud collecting bin 500 is arranged under the barrel 100, the large-diameter end of the mud collecting bin 500 is connected with the bottom end of the barrel 100 in a sealing manner, and the small-diameter end of the mud collecting bin 500 is provided with a mud discharging valve (not shown in the figure). The sludge collection bin 500 is arranged to be in a conical structure, so that on one hand, precipitated impurities can be guided to the bottom of the small-diameter end of the sludge collection bin 500, and are conveniently discharged by a sludge discharge valve; on the other hand, the inner cone surface of the sludge collecting bin 500 forms certain guiding and flow blocking effects on the bottom of the anoxic reaction area, and sewage flowing down from the anoxic reaction area flows to the aeration device at the central position under the guiding effect of the inner cone surface, so that the sewage is conveniently brought up by the airflow of the aeration device, and the internal circulation sewage treatment process is better realized.

As shown in fig. 1, 2 and 4, a sewage inlet pipe 200 is provided at an upper portion of the cylinder 100, one end of the sewage inlet pipe 200 extends into the cylinder 100 and is located above the anoxic reaction zone, and the sewage inlet pipe 200 is used to guide sewage to the anoxic reaction zone. During specific implementation, one end of the sewage inlet pipe 200 extending into the barrel 100 is communicated with the semi-annular distribution pipe 201, the distribution pipe 201 is arranged right above the anoxic reaction area, and a plurality of water inlets are uniformly arranged on the distribution pipe 201 (specifically, downward holes are arranged on the lower side of the distribution pipe 201, the aperture and the number of the holes are set according to the water inlet flow, the flow rate of the water outlet holes is kept to be 0.8-1.2 m/s), and sewage introduced through the sewage inlet pipe 200 can be uniformly guided into the anoxic reaction area under the action of the distribution pipe 201.

Further, the sewage denitrification device also comprises a carbon source supplementing system. The carbon source supplementing system comprises a TN on-line monitor, a controller, a carbon source supplementing device and a carbon inlet pipe 210. The carbon source supplementing device is communicated with the sewage inlet pipe 200 through a carbon source inlet pipe 210, and the controller is respectively electrically connected with the TN on-line monitor and the carbon source supplementing device. The TN on-line monitor is used for detecting the TN concentration of the inlet water or the outlet water, thereby controlling the carbon source supplementing device to adjust the carbon source supplementing quantity under the action of the controller, so as to achieve the optimal carbon-nitrogen ratio required by the growth of microorganisms, enable the biological membrane to be in the optimal active state and achieve the purpose of optimal sewage treatment effect. The carbon source supplementing device can be a simple carbon source solvent barrel and a flow control valve, the carbon source solvent barrel is arranged at a high position, the bottom end of the carbon source solvent barrel is communicated with the carbon inlet source pipe 210 through the flow control valve, and after the flow control valve is adjusted by the controller, the solvent in the carbon source solvent barrel automatically flows into the sewage inlet pipe 200 under the self weight and fully mixes with the inlet water and then flows into the barrel 100. Of course, in order to further accurately control the flow rate and pressure for supplementing the carbon source, a pump may be added as a power source to deliver the carbon source solvent, which is not described herein.

Further, the volume ratio of the aerobic reaction zone to the anoxic reaction zone is determined according to the ratio of COD to TN in the sewage to be treated, and specifically comprises the following steps:

in the COD: TN =10-20, aerobic reaction zone volume: the volume of the anoxic reaction zone =4:1-3: 1;

in the COD: TN =5-10, aerobic reaction zone volume: the volume of the anoxic reaction zone =3:1-2: 1;

in the COD: when TN is less than 5, the volume of the aerobic reaction zone is as follows: the volume of the anoxic reaction zone =2:1-1: 1.

When the device is implemented, the aerobic reaction zone and the anoxic reaction zone are reasonably planned and arranged according to the requirements, so that the aerobic reaction process and the anoxic reaction process of sewage in the device can be more reasonably distributed, the sewage treatment effect is effectively improved, the inner space of the cylinder body 100 is effectively utilized, and the characteristics of small volume and small occupied area of the device are kept. In specific implementation, due to the overall structural characteristics of the device, the reasonable customization of the volume ratio of the aerobic reaction zone to the anoxic reaction zone can be realized only by adjusting the cross-sectional area surrounded by the partition plate frame 120, and the realization mode is very simple and convenient. Especially in the actual application such as the upgrading transformation of village and town sewage treatment project or current sewage plant, each regional sewage component is different, obtains the ratio of COD and TN in the sewage of treating through sampling on the spot, matches the volume in aerobic reaction district and oxygen deficiency reaction district according to this ratio according to above-mentioned setting mode, can make the device more closely be in the actual application scene, obtains better sewage treatment effect.

Generally, the aeration device not only aerates the aerobic reaction zone, but also provides power for internal circulation treatment of sewage, and also provides a back flushing air source for the blockage prevention of the filtering device; the sludge collecting bin 500 adopts a conical structure, so that sludge is conveniently discharged, and the internal circulation sewage treatment process is better realized; which embodies a high degree of integration of the device. The automation of the equipment is realized through the automatic control of the control valve on the aeration pipe 320, the automatic control of the carbon source supplement and the automatic control of the valve 430 on the backflushing pipeline 420. Meanwhile, the integral structure of the sewage denitrification device by the biomembrane method is relatively simple, the manufacturing is convenient, the equipment production can be realized, the transportation is convenient, and the integral cost is low. The device can be used independently, and can also be applied in parallel (when in parallel connection, only one water outlet pipe 410 is communicated with the other water inlet pipe 200), thereby meeting the sewage treatment requirements of different water qualities and different treatment requirements, having wide application range and extremely high popularization significance.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A sewage denitrification device, which is characterized in that,

the reactor comprises a cylinder body (100), wherein a partition plate (110) and a partition plate frame (120) are arranged in the cylinder body (100), the partition plate (110) divides an inner cavity of the cylinder body (100) into a reaction zone and a filtering zone, the partition plate frame (120) is arranged in the reaction zone, an aerobic reaction zone is formed between the partition plate frame (120) and the partition plate (110), an anoxic reaction zone is formed between the partition plate frame (120) and the inner wall of the cylinder body (100), and the height of the partition plate frame (120) is lower than that of the partition plate (110);

2. The denitrification apparatus for wastewater as claimed in claim 1, further comprising a wastewater inlet pipe (200), wherein one end of the wastewater inlet pipe (200) extends into the tank (100) and is located above the anoxic reaction zone, and the wastewater inlet pipe (200) is used for guiding wastewater to the anoxic reaction zone.

3. The sewage denitrification device according to claim 2, further comprising a carbon source supplementing system, wherein the carbon source supplementing system comprises a TN on-line monitor, a controller, a carbon source supplementing device and a carbon source inlet pipe (210), the TN on-line monitor is used for detecting the total nitrogen value of the sewage entering the sewage inlet pipe (200), the carbon source supplementing device is communicated with the sewage inlet pipe (200) through the carbon source inlet pipe (210), and the controller is respectively electrically connected with the TN on-line monitor and the carbon source supplementing device.

4. The sewage denitrification apparatus according to claim 1, wherein the aeration apparatus comprises an aeration pipe (320) and an aeration disc (310), the aeration disc (310) is disposed directly below the aerobic reaction zone, a plurality of aeration holes are formed in the direction of the aeration disc (310) facing the aerobic reaction zone, and one end of the aeration pipe (320) is communicated with the aeration disc (310).

5. The sewage denitrification apparatus according to claim 4, wherein the aeration pipe (320) is provided with a control valve for controlling the size of the airflow in the aeration pipe (320), and further comprising a controller and a dissolved oxygen probe for detecting the dissolved oxygen content in the middle upper part of the aerobic reaction zone and the middle lower part of the anoxic reaction zone, wherein the controller is electrically connected to the dissolved oxygen probe and the control valve respectively.

6. The sewage denitrification device according to claim 4, wherein a plurality of filtering devices (400) are arranged in the filtering area, the filtering devices (400) comprise an arc-shaped frame body and a filter cloth, and the filter cloth is arranged outside the frame body in a wrapping manner to enable the filtering devices (400) to be of a closed hollow structure;

the water outlet pipe (410) is used for enabling the inner cavities of the filtering devices (400) to be communicated with the outside of the cylinder body (100).

7. The sewage denitrification apparatus according to claim 6, wherein a back flush pipe (420) is provided on the filtering apparatus (400), one end of the back flush pipe (420) is communicated with the inner cavity of the filtering apparatus (400), the other end of the back flush pipe (420) is communicated with a valve (430), and the other end of the valve (430) is communicated with the aeration pipe (320).

8. The sewage denitrification device according to claim 1, further comprising a sludge collection chamber (500) with a conical structure, wherein the sludge collection chamber (500) is arranged below the cylinder (100), and the large-diameter end of the sludge collection chamber (500) is hermetically connected with the bottom end of the cylinder (100).