Sewage treatment equipment

Abstract

The utility model discloses sewage treatment equipment, and belongs to the field of sewage treatment, the sewage treatment equipment comprises an anaerobic zone, an anoxic zone, an aerobic tank and a carrier recovery device, the anoxic zone and the anaerobic zone are arranged in the same tank at an interval, and the anoxic zone circumferentially surrounds the aerobic tank; a water passing hole communicated with the anoxic zone is formed in the aerobic tank; a sludge inlet of the carrier recovery device is connected with the aerobic tank; an effluent weir is arranged at the top of the aerobic tank, an aeration device is arranged at the bottom of the aerobic tank, a settling zone and a water passing hole are sequentially arranged between the effluent weir and the aeration device from top to bottom, the settling zone is used for separating sludge and supernate, so that the supernate flows out of the effluent weir, and the sludge flows into the carrier recovery device from the sludge inlet. According to the sewage treatment equipment, the space is fully utilized, the occupied area is reduced, the structure is compact, sludge containing more powder carriers is separated through precipitation and enters the carrier recovery device to be recovered, the loss of the powder carriers is reduced, and the sewage treatment cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to sewage treatment equipment. Background Art

[0002] Sewage treatment refers to a process of treating sewage, the purpose of which is to purify the water quality so that the sewage meets specific discharge standards. Integrated sewage treatment equipment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering.

[0003] For example, a Chinese patent document (publication number: CN 203820542 U) provides an aerobic-anaerobic integrated fluidized bed biofilm reactor device, comprising an integrated anaerobic tank and an aerobic tank, wherein the anaerobic tank comprises an anaerobic tank body and a sewage carrier separation chamber interconnected at the bottom, wherein the sewage carrier separation chamber is used to separate sewage and the carrier; the aerobic tank comprises an aerobic tank body and a mud-water separation sedimentation chamber interconnected at the bottom, wherein the mud-water separation sedimentation chamber is used to separate sewage and sludge, wherein the top of the sewage carrier separation chamber is also connected to the aerobic tank body, and the mud-water separation sedimentation chamber is respectively connected to a mud discharge port and a water outlet, and the anaerobic tank body is connected to a sewage inlet.

[0004] The reaction pools of the above-mentioned device are arranged in a unidirectional sequence, occupying a large area. Moreover, when treating sewage with smaller biological carriers, it is easy to cause waste due to difficulty in effective recovery.

[0005] For the above problems, the related technologies do not provide effective solutions. Utility Model Content

[0006] In order to solve the problems that may exist in the related art, some embodiments of the present application provide a sewage treatment equipment, including: an anaerobic zone, capable of receiving sewage; an anoxic zone, which is arranged at intervals with the anaerobic zone in the same tank and circumferentially surrounds an aerobic tank; an aerobic tank, which is provided with a water hole for connecting to the anoxic zone; a carrier recovery device, whose mud inlet is connected to the aerobic tank; wherein the aerobic tank has a water outlet weir at the top and an aeration device at the bottom, and a sedimentation zone and the water outlet hole are sequentially provided between the water outlet weir and the aeration device from top to bottom, and the sedimentation zone is used to separate sludge and supernatant, so that the supernatant flows out from the water outlet weir, and the sludge flows into the carrier recovery device from the mud inlet.

[0007] Furthermore, it comprises two anaerobic zones and two anoxic zones which are arranged opposite to each other, and flow promoters are arranged at the bottom of the anaerobic zone and the anoxic zone.

[0008] Further, only one anaerobic zone is provided with an inlet pump for receiving sludge.

[0009] Furthermore, the water outlet weir comprises a plurality of openings, each of which is connected to a pipe, and all the pipes are connected in parallel to the water outlet pipe.

[0010] Furthermore, a baffle is provided between the sedimentation zone and the aeration device; a gas collecting hood is provided on the upper part of the baffle for discharging gas from the aerobic tank after adsorbing bubbles; the sedimentation zone includes an inclined plate, and a mud hopper is provided under the inclined plate for sending the sludge to the carrier recovery device after the sludge is precipitated.

[0011] Furthermore, the carrier recovery device is arranged below the mud bucket so that the settled sludge flows into the carrier recovery device by its own weight.

[0012] Furthermore, an exhaust port is provided on the top of the aerobic pool, the exhaust port is higher than the water outlet weir, and the exhaust port is connected to the air collecting hood through an exhaust pipe.

[0013] Furthermore, the carrier recovery device also includes an upper outlet and a lower outlet, the lower outlet is connected to the anaerobic zone to transport the separated carrier, and the upper outlet is used to discharge the remaining sludge.

[0014] Furthermore, the carrier recovery device is provided with an electric regulating valve at the mud inlet to control the flow rate and pressure of the sludge entering the carrier recovery device.

[0015] Furthermore, the anaerobic zone and the anoxic zone are located in a circular pool, and the aerobic pool is rectangular.

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] The sewage enters from the anaerobic zone, flows along the outer side of the aerobic tank wall, and flows into the aerobic tank from the water holes in the anoxic zone. The A2 / O process is integrated into an integrated structure, which makes full use of the space, reduces the floor space, and has a compact structure. At the same time, the inclined plate on the top of the aerobic tank cooperates with the aeration device at the bottom. The powder carrier has a larger mass than ordinary sludge particles. The sludge containing more powder carriers is separated by sedimentation and enters the carrier recovery device for recovery, which reduces the loss of powder carriers and saves sewage treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0019] Figure 1 A sewage treatment device according to an embodiment of the present application;

[0020] Figure 2 A sewage treatment device according to an embodiment of the present application;

[0021] Description of labels:

[0022] 100, anaerobic zone; 110, water inlet pump; 120, mud delivery pipeline;

[0023] 200, hypoxic zone;

[0024] 300, aerobic tank; 310, water hole; 320, water outlet weir; 330, aeration device; 331, fan; 340, baffle; 350, air collecting hood; 351, exhaust port; 360, inclined plate; 361, mud bucket;

[0025] 400, carrier recovery device; 410, mud inlet; 420, upper outlet; 430, lower outlet; 440, feeding pipeline; 450, electric regulating valve;

[0026] 500. Flow booster. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0029] like Figure 1 , Figure 2As shown, this embodiment provides a sewage treatment device, including an anaerobic zone 100, an anoxic zone 200 and an aerobic tank 300. The anaerobic zone 100 can receive sewage, and the anoxic zone 200 and the anaerobic zone 100 are arranged in the same tank at intervals and surround the aerobic tank 300 in a circumferential direction. The aerobic tank 300 is provided with a water hole 310 for connecting with the anoxic zone 200. The carrier recovery device 400 has a mud inlet 410 connected to the aerobic tank 300.

[0030] Among them, the aerobic pool 300 has a water outlet weir 320 at the top and an aeration device 330 at the bottom. A sedimentation area and a water hole 310 are arranged from top to bottom between the water outlet weir 320 and the aeration device 330. The sedimentation area is used to separate the sludge and the supernatant, so that the supernatant flows out from the water outlet weir 320 and the sludge flows into the carrier recovery device 400. It is worth noting that the "supernatant" here refers to the water body separated from the sludge after the sewage is precipitated in the sedimentation area. As a specific solution, the aeration device 330 is connected to the fan 331 to fully supply the aerobic pool 300 and fully mix the sewage in the aerobic pool 300.

[0031] In this way, sewage enters from the anaerobic zone 100, flows along the outer side of the wall of the aerobic tank 300, and flows into the aerobic tank 300 from the water hole 310 at the anoxic zone 200, integrating the A2 / O process into an integrated structure, making full use of space, reducing the floor area, and having a compact structure. At the same time, the inclined plate 360 ​​on the top of the aerobic tank 300 cooperates with the aeration device 330 at the bottom, and utilizing the characteristic that the mass of the powder carrier is greater than that of ordinary sludge particles, the sludge containing more powder carriers is separated by sedimentation and enters the carrier recovery device 400 for recovery, thereby reducing the loss of powder carriers and saving sewage treatment costs.

[0032] Furthermore, the sewage treatment device in the related art generally has a reflux pump installed in the aerobic tank 300 to allow the sewage that has undergone aerobic reaction in the aerobic tank 300 to flow back to the anoxic tank again. In this embodiment, at least part of the sewage is directly returned to the anoxic zone 200 through the water hole 310 after undergoing aerobic reaction in the aerobic tank 300 to undergo denitrification reaction, thereby achieving the effect of removing carbon and hydrogen at the same time.

[0033] Preferably, the sewage treatment equipment of this embodiment further includes two relatively arranged anaerobic zones 100 and two relatively arranged anoxic zones 200, and flow pushers 500 are provided at the bottom of the anaerobic zone 100 and the anoxic zone 200. Specifically, the flow pushers 500 push the flow in the same direction. More specifically, the flow pusher 500 pushes the flow in a 45° upward direction, further preventing the sewage from settling in the reaction tank.

[0034] Therefore, on the basis of the original A2 / O process, an inverted A2 / O process was further designed. After the sewage entered the anaerobic zone 100, under the action of the flow promoter 500, at least part of it entered the anoxic zone 200 and the anaerobic zone 100 in turn, and then entered the anoxic zone 200 again, thereby enhancing the phosphorus removal effect.

[0035] Specifically, only one anaerobic zone 100 is provided with a water inlet pump 110 for receiving sewage, so as to further reduce energy consumption.

[0036] Preferably, the carrier recovery device 400 further includes an upper outlet 420 and a lower outlet 430. The lower outlet 430 is connected to the anaerobic zone 100 to transport the separated carriers, and the upper outlet 420 is used to discharge the remaining sludge. The carriers at the lower outlet 430 are directly put into the anaerobic zone 100 for use again, which improves the water treatment efficiency, strengthens the biochemical treatment performance of the sewage system and the sedimentation performance of the sewage, and ensures that the integrated treatment equipment has a stable and high effluent quality.

[0037] Specifically, the water inlet pump 110 is respectively connected to a mud delivery pipe 120 for delivering sewage and a material delivery pipe 440 for delivering carriers, and the material delivery pipe 440 is connected to the lower outlet 430 .

[0038] Among them, a baffle 340 is arranged between the sedimentation zone and the aeration device 330. A gas collecting hood 350 is arranged on the upper part of the baffle 340, which is used to adsorb bubbles and discharge the gas from the aerobic tank 300. A mud bucket 361 is arranged below the inclined plate 360, which is used to send the sludge to the carrier recovery device 400 after the sludge is precipitated. Specifically, the inclined plate 360, the gas collecting hood 350 and the baffle 340 are arranged in sequence from top to bottom. The aeration device 330 generates a large number of bubbles during the oxygen supply process, causing the carrier-rich sewage to rise. In the process again, the baffle 340 blocks the bubbles in advance, and then the gas collecting device collects and discharges the bubbles out of the equipment. Subsequently, the pushing force on the sewage is reduced and the sewage is precipitated to the inclined plate 360, shortening the sedimentation distance of the sewage and greatly increasing the treatment efficiency of the aerobic zone. If the baffle 340 is arranged on the inclined plate or near the inclined plate, the treatment speed will be reduced, and the cleanliness of the supernatant discharged from the aerobic tank 300 will be reduced.

[0039] More specifically, in order to further reduce equipment energy consumption, the carrier recovery device 400 is arranged below the mud hopper 361 so that the settled sludge flows into the carrier recovery device 400 by its own weight, utilizing the gravity characteristics of the sludge rich in carriers to reduce the use of pumps that only serve as a transmission function, thereby saving costs.

[0040] The top of the aerobic pool 300 is provided with an exhaust port 351 , which is higher than the water outlet weir 320 , and the exhaust port 351 is connected to the gas collecting hood 350 through an exhaust pipe.

[0041] As a specific solution, the water outlet weir 320 includes a plurality of openings, each of which is connected to a pipe, and all the pipes are connected in parallel to the water outlet pipe, thereby further saving space.

[0042] In order to prevent too much sludge to be treated from entering the carrier recovery device 400, as an optional solution, the carrier recovery device 400 is provided with an electric regulating valve 450 at the mud inlet 410 to control the flow and pressure of the sludge entering the carrier recovery device 400, so as to avoid overloading the carrier recovery device 400 and affecting the accuracy of carrier recovery.

[0043] As another optional solution, the mud bucket 361 may be connected in parallel with a plurality of carrier recovery devices 400 to increase the carrier recovery efficiency.

[0044] The anaerobic zone 100 and the anoxic zone 200 are located in a circular tank so that the equipment can fully utilize the ground area. The aerobic tank 300 is rectangular to fully match the rectangular gas collecting hood 350 on the market.

[0045] The following is a usage of the sewage treatment equipment of this embodiment:

[0046] The sewage enters the anaerobic zone 100 through the mud delivery pipe 120 and the water inlet pump 110, and enters the anoxic zone 200, the anaerobic zone 100, and the anoxic zone 200 in turn under the action of the flow pusher 500 to react, and then enters the aerobic tank 300 from the water hole 310 in the anoxic zone 200. The blower 331 and the aeration device 330 aerate the aerobic tank 300 to perform aerobic reactions and remove pollutants such as COD, ammonia nitrogen, total phosphorus, and total nitrogen in the sewage. The aerated bubbles are concentrated to the collecting tank through the baffle 340. The sludge is discharged from the hood 350 through the exhaust port 351 at the top, and the sewage is separated into sludge and supernatant in the sedimentation area. The sludge is settled in the inclined plate 360 ​​and then enters the mud hopper, and is transported to the carrier recovery device 400 through a pipeline. The recovered powder carrier enters the water inlet pump 110 from the feeding pipeline 440 and then returns to the anaerobic zone 100. The remaining sludge is discharged from the upper outlet 420 of the carrier recovery device 400, and the treated supernatant is discharged through the outlet weir 320 at the top of the aerobic tank 300 and the outlet pipe.

[0047] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sewage treatment equipment, characterized in that: include: an anaerobic zone, capable of receiving sewage; The anoxic zone is set apart from the anaerobic zone in the same tank and surrounds the aerobic tank; The aerobic pool is provided with a water hole for connecting to the anoxic zone; A carrier recovery device, the mud inlet of which is connected to an aerobic tank; Among them, the aerobic tank is provided with a water outlet weir on the top, and an aeration device is provided at the bottom of the aerobic tank. A sedimentation area and the water through hole are provided in sequence from top to bottom between the water outlet weir and the aeration device. The sedimentation area is used to separate sludge and supernatant, so that the supernatant flows out from the water outlet weir, and the sludge flows into the carrier recovery device from the mud inlet of the carrier recovery device.

2. The sewage treatment equipment according to claim 1, characterized in that: It comprises two anaerobic zones and two anoxic zones which are arranged opposite to each other, and flow pushers are arranged at the bottom of the anaerobic zone and the anoxic zone.

3. The sewage treatment equipment according to claim 2, characterized in that: Only one anaerobic zone is provided with an inlet pump for receiving sludge.

4. The sewage treatment equipment according to claim 1, characterized in that: The water outlet weir comprises a plurality of openings, each of which is connected to a pipe, and all the pipes are connected in parallel to the water outlet pipe.

5. The sewage treatment equipment according to claim 1, characterized in that: A baffle is provided between the sedimentation zone and the aeration device; A gas collecting hood is provided on the upper part of the baffle plate, which is used to adsorb bubbles and discharge the gas out of the aerobic pool; The sedimentation area comprises an inclined plate, and a mud bucket is arranged below the inclined plate for sending the sludge into a carrier recovery device after the sludge is settled.

6. The sewage treatment equipment according to claim 5, characterized in that: The carrier recovery device is lower than the mud bucket so that the settled sludge flows into the carrier recovery device by its own weight.

7. The sewage treatment equipment according to claim 5, characterized in that: An exhaust port is arranged on the top of the aerobic pool. The exhaust port is higher than the water outlet weir and is connected to the air collecting hood through an exhaust pipe.

8. The sewage treatment equipment according to claim 7, characterized in that: The carrier recovery device also includes an upper outlet and a lower outlet, wherein the lower outlet is connected to a water inlet pump to transport the separated carriers, and the upper outlet is used to discharge the remaining sludge.

9. The sewage treatment equipment according to claim 8, characterized in that: The carrier recovery device is provided with an electric regulating valve at the mud inlet to control the flow rate and pressure of the sludge entering the carrier recovery device.

10. The sewage treatment equipment according to claim 9, characterized in that: The anaerobic zone and the anoxic zone are located in a circular pool, and the aerobic pool is rectangular.

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