CN219117291U

CN219117291U - Sewage treatment equipment

Info

Publication number: CN219117291U
Application number: CN202223096674.5U
Authority: CN
Inventors: 石艳春; 李锦�; 刘洪�; 胡肖怡; 庄兆恒
Original assignee: Cgn Environmental Protection Industry Co ltd
Current assignee: Cgn Environmental Protection Industry Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-02
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses sewage treatment equipment which comprises a water inlet pipe, a denitrification selection area, an anaerobic area, an anoxic area, an aerobic area and a sedimentation area which are connected in sequence, wherein the denitrification selection area is positioned in the anaerobic area and is separated from the anaerobic area by a baffle, and the water inlet pipe is respectively communicated with the denitrification selection area and the anaerobic area and is used for respectively introducing sewage into the denitrification selection area and the anaerobic area. Compared with the prior art, the sewage treatment equipment provided by the utility model has the advantages that the denitrification selection area is added at the front end of the anaerobic area, the reflux sludge firstly enters the denitrification selection area, the adverse effect of the reflux sludge on the anaerobic area can be eliminated, the carbon source is fully utilized for denitrification, the nitrogen removal effect is increased, and meanwhile, the phosphorus removal effect of the anaerobic tank is improved, so that the sewage treatment efficiency can be improved, and the sewage treatment cost is reduced.

Description

Sewage treatment equipment

Technical Field

The utility model relates to the field of sewage treatment, in particular to sewage treatment equipment.

Background

The existing rural domestic sewage treatment equipment basic biological treatment process mainly extends to the processes commonly adopted in urban domestic sewage treatment, and comprises an AAO (anaerobic-anoxic-oxic) process, a multistage AO (anaerobic-anoxic-oxic) process and a biological contact oxidation process, wherein the AAO process comprises an anaerobic zone (A), an anoxic zone (A) and an aerobic zone (O), and in the operation process, sewage sequentially passes through anaerobic, anoxic and aerobic treatment units, and is discharged after mud-water separation of a sedimentation tank. The mixed liquor in the aerobic zone needs to flow back to the anoxic zone to increase TN removal effect, which is called internal reflux, and the sludge in the sedimentation tank needs to flow back to the anaerobic zone to maintain the system sludge concentration, which is called external reflux.

The multistage AO technology divides sewage into anaerobic zone, anoxic zone, facultative zone and aerobic zone in biological pool, so that carbon source in sewage can be selectively supplied to different functional zones, and can be used for anaerobic phosphorus release, denitrification and denitrification, etc. so that it can effectively save carbon source. Meanwhile, the sludge concentration can be increased, and the volume of the biological pool can be reduced. The multi-level AO is an improved AAO process, so that carbon sources can be more reasonably distributed, and investment and operation cost can be reduced.

Biological contact oxidation is a wastewater biological treatment technology derived from a biological membrane method, in which sewage is contacted with the biological membrane, and the sewage can be purified under the action of microorganisms on the biological membrane, so that the biological membrane is also called a submerged biological filter. The method adopts the aeration method which is the same as the aeration tank to provide the oxygen amount required by microorganisms, plays the roles of stirring and mixing, and simultaneously adds filler in the aeration tank for the attached growth of microorganisms, thus the method is also called a contact aeration method, is a biological treatment method between an activated sludge method and a biological filter tank, is a biological membrane method with the characteristics of the activated sludge method, and has the advantages of the activated sludge method and the biological filter tank.

The integrated domestic sewage treatment equipment produced by different equipment manufacturers has slightly different applied processes, and mainly comprises local adjustment of the processes, selection of the types of fillers, optimization of the aeration mode and the like; because the equipment nitrogen and phosphorus removal fights for the carbon source, the consumption of the external carbon source adding agent is increased, and the problems of poor nitrogen and phosphorus removal effect and high operation and maintenance cost exist.

Disclosure of Invention

The utility model aims at: overcomes at least one defect in the prior art, and provides sewage treatment equipment which can improve sewage treatment efficiency and reduce sewage treatment cost.

In order to achieve the above object, the present utility model provides a sewage treatment apparatus, which comprises a water inlet pipe, a denitrification selection zone, an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone which are connected in sequence, wherein the denitrification selection zone is located inside the anaerobic zone and is separated from the anaerobic zone by a partition plate, and the water inlet pipe is respectively communicated with the denitrification selection zone and the anaerobic zone and is used for respectively introducing sewage into the denitrification selection zone and the anaerobic zone.

According to one embodiment of the sewage treatment device, a valve is arranged on the water inlet pipe, and the valve is used for enabling 10-30% of sewage with a volume ratio to enter the denitrification selection area, and 70-90% of sewage with a volume ratio to enter the anaerobic area.

According to one embodiment of the sewage treatment equipment, the sedimentation zone is provided with a sedimentation tank water inlet pipe, and the sedimentation tank water inlet pipe is communicated with the aerobic zone and the sedimentation zone.

According to one embodiment of the sewage treatment device, the aerobic zone is internally provided with a filler and an aeration device.

According to one embodiment of the sewage treatment device, the aerobic zone is provided with a first gas extraction pipe and a nitrifying liquid return pipe, the nitrifying liquid return pipe is used for communicating the aerobic zone and the anoxic zone, and the first gas extraction pipe is used for returning generated nitrifying liquid to the anoxic zone through the nitrifying liquid return pipe.

According to one embodiment of the sewage treatment device of the present utility model, the sedimentation zone is adjacent to the anaerobic zone and the aerobic zone, respectively; the sedimentation zone is provided with a second gas stripping pipe and a sludge return pipe, the sludge return pipe is used for communicating the sedimentation zone and the denitrification selection zone, and the second gas stripping pipe is used for returning sludge to the denitrification selection zone through the sludge return pipe.

According to one embodiment of the sewage treatment apparatus of the present utility model, the sedimentation zone is provided with a sludge discharge opening for discharging soil in the sedimentation zone.

According to one embodiment of the sewage treatment equipment, the sewage treatment equipment further comprises an equipment room, wherein the equipment room is adjacent to the anaerobic zone and the sedimentation zone, and a rotary fan and an electric control cabinet are installed in the equipment room.

According to one embodiment of the sewage treatment equipment, the sedimentation area is connected with a water outlet pipe, an ultraviolet sterilizer is arranged on the water outlet pipe, and the water outlet is discharged after being sterilized by the ultraviolet sterilizer.

Compared with the prior art, the sewage treatment equipment provided by the utility model has the advantages that the denitrification selection area is added at the front end of the anaerobic area, the reflux sludge firstly enters the denitrification selection area, the adverse effect of the reflux sludge on the anaerobic area can be eliminated, the carbon source is fully utilized for denitrification, the nitrogen removal effect is increased, and meanwhile, the phosphorus removal effect of the anaerobic tank is improved, so that the sewage treatment efficiency can be improved, and the sewage treatment cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions described in the embodiments of the present utility model, the drawings referred to in the embodiments will be briefly described below, in which the drawings are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a sewage treatment apparatus of the present utility model.

FIG. 2 is a sewage treatment flow chart of the sewage treatment apparatus of the present utility model.

In the drawing the view of the figure,

the sewage treatment device comprises a water inlet pipe-1, a denitrification selection area-2, an anaerobic area-3, a baffle-4, an anoxic area-5, an aerobic area-6, an emptying port-7, a first gas stripping pipe-8, a nitrifying liquid return pipe-9, a sedimentation tank water inlet pipe-10, a second gas stripping pipe-11, a mud discharge port-12, a sedimentation area-13, a mud return pipe-14, a rotary fan-15, a device room-16, a water outlet pipe-17, an ultraviolet sterilizer-18, an electric control cabinet-19, a water outlet-20 and a sewage treatment device-100.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description; note that the following description of the embodiments is merely an example, and the present utility model is not intended to be limited to the applications and uses thereof, and is not limited to the following embodiments.

Referring to fig. 1, the utility model discloses a sewage treatment device 100, which comprises a water inlet pipe 1, a denitrification selection area 2, an anaerobic area 3, an anoxic area 5, an aerobic area 6 and a sedimentation area 13 which are sequentially connected, wherein the denitrification selection area 2 is positioned inside the anaerobic area 3 and is separated from the anaerobic area 3 by a partition board 4, and the water inlet pipe 1 is respectively communicated with the denitrification selection area 2 and the anaerobic area 3 and is used for respectively introducing sewage into the denitrification selection area 2 and the anaerobic area 3.

Specifically, install the valve on the inlet tube 1, can make sewage get into denitrification selection area 2, anaerobism district 3 respectively through this valve, control sewage get into denitrification selection area 2, anaerobism district 3's entering amount to this rational distribution carbon source, alleviate the contending of equipment nitrogen and phosphorus removal to the carbon source, reduce the medicament consumption that the addition outside carbon source caused. For example, according to one embodiment of the present utility model, by adjusting the valve on the water inlet pipe 1, 10-30% of the sewage with a volume ratio can enter the denitrification selection area 2, 70-90% of the sewage with a volume ratio enters the anaerobic area 3, the sewage reacted in the denitrification selection area 2 enters the anaerobic area 3 for further treatment after reaction, the denitrification selection area 2 is added at the front end of the anaerobic area 3, the denitrification can be performed by fully utilizing the carbon source, and the dephosphorization effect of the anaerobic area 3 can be improved while the nitrogen removal effect is increased.

The anoxic zone 5 is located on one side of the anaerobic zone 3, the aerobic zone 6 is adjacent to the anoxic zone 5, the aerobic zone 6 is provided with a first gas extraction pipe 8 and a nitrifying liquid return pipe 9, the nitrifying liquid return pipe 9 is used for communicating the aerobic zone 6 with the anoxic zone 5, the first gas extraction pipe 8 is used for returning nitrifying liquid generated by the aerobic zone 6 to the anoxic zone 5 through the nitrifying liquid return pipe 9, and it is noted that the nitrifying liquid returns to the anoxic zone 5 without affecting the anoxic environment of the anoxic zone 5, and the denitrification efficiency of the anoxic zone 5 can be improved.

The sedimentation zone 13 is provided with an emptying port 7, the sedimentation zone 13 is provided with a sedimentation tank water inlet pipe 10, the sedimentation tank water inlet pipe 10 is communicated with the aerobic zone 6 and the sedimentation zone 13, sewage can sequentially enter the anoxic zone 5, the aerobic zone 6 and the sedimentation zone 13 for treatment after reacting in the denitrification selection zone 2 and the anaerobic zone 3, and a filler and an aeration device are arranged in the aerobic zone 6, and the aeration device adopts a plug flow type gradual reduction aeration technology.

The sedimentation zone 13 is adjacent to the anaerobic zone 3 and the aerobic zone 6, the sedimentation zone 13 is provided with a second gas stripping pipe 11 and a sludge return pipe 14, the sludge return pipe 14 is used for communicating the sedimentation zone 13 and the denitrification selection zone 2, and the second gas stripping pipe 11 can return sludge in the sedimentation zone 13 to the denitrification selection zone 2 through the sludge return pipe 14; the first air stripping pipe 8 and the second air stripping pipe 11 use the pressurized air provided by the aeration device of the aerobic zone 6 as power, and do not need to add power consumption equipment such as a conventional water pump, and have the advantages of low investment cost and simple operation and maintenance.

The sedimentation zone 13 is provided with a mud discharge port 12, the mud discharge port 12 is used for discharging mud in the sedimentation zone 13, part of the discharged mud can be introduced into the denitrification selection zone 2 for re-reaction through a pipeline, and the other part of the discharged mud is introduced into a mud disposal system for treatment; the sedimentation area 13 is provided with a water outlet pipe 17, an ultraviolet sterilizer 18 is arranged on the water outlet pipe 17, and the treated sewage is discharged through a water outlet 20 after being sterilized by the ultraviolet sterilizer 18.

In the embodiment shown in fig. 1, the sewage treatment apparatus 100 further comprises an apparatus room 16, wherein the apparatus room 16 is adjacent to the anaerobic zone 3 and the sedimentation zone 13, and a rotary fan 15 and an electric control cabinet 19 are installed in the apparatus room 16.

Referring to fig. 2, in the working process of the sewage treatment apparatus 100 of the present utility model, by adjusting the valve on the water inlet pipe 1, sewage is respectively introduced into the denitrification selection area 2 and the anaerobic area 3, and the sewage is introduced in a sectional manner, so as to reasonably distribute carbon sources, reduce the contention of denitrification and dephosphorization of the apparatus for the carbon sources, and reduce the consumption of chemicals caused by adding external carbon sources; the sewage is introduced into the anaerobic zone 3 after being reacted in the denitrification selection zone 2, and the denitrification selection zone 2 is added at the front end of the anaerobic zone 3, so that the denitrification can be performed by fully utilizing a carbon source, and the dephosphorization effect of the anaerobic zone 3 can be improved while the nitrogen removal effect is increased; then, after the sewage reacts in the denitrification selection area 2 and the anaerobic area 3, the sewage sequentially enters the anoxic area 5, the aerobic area 6 and the sedimentation area 13 for treatment, and finally, the treated sewage is sterilized by the ultraviolet sterilizer 18 and then is discharged through the water outlet 20.

Finally, the foregoing embodiments of the present utility model are merely examples of the present utility model and are not intended to limit the embodiments of the present utility model; other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art, based on the foregoing description; not all embodiments are exemplified here; obvious changes and modifications are included in the scope of the present utility model as they are extended from the technical proposal of the present utility model.

Claims

1. The sewage treatment device is characterized by comprising a water inlet pipe, a denitrification selection area, an anaerobic area, an anoxic area, an aerobic area and a sedimentation area which are sequentially connected, wherein the denitrification selection area is positioned inside the anaerobic area and is separated from the anaerobic area by a partition plate, and the water inlet pipe is respectively communicated with the denitrification selection area and the anaerobic area and is used for respectively introducing sewage into the denitrification selection area and the anaerobic area.

2. The sewage treatment apparatus according to claim 1, wherein a valve is installed on the water inlet pipe, the valve being for allowing 10-30% by volume of sewage to enter the denitrification selection zone and 70-90% by volume of sewage to enter the anaerobic zone.

3. The sewage treatment device according to claim 1, wherein a sedimentation tank water inlet pipe is arranged on the sedimentation zone, and the sedimentation tank water inlet pipe is communicated with the aerobic zone and the sedimentation zone.

4. The sewage treatment apparatus according to claim 1, wherein a filler and an aeration device are provided in the aerobic zone.

5. The sewage treatment apparatus according to claim 1, wherein the aerobic zone is provided with a first gas-extracting pipe and a nitrifying liquid-returning pipe, the nitrifying liquid-returning pipe is used for communicating the aerobic zone with the anoxic zone, and the first gas-extracting pipe is used for returning the generated nitrifying liquid to the anoxic zone through the nitrifying liquid-returning pipe.

6. The wastewater treatment plant of claim 1, wherein the sedimentation zone is adjacent to the anaerobic zone and the aerobic zone, respectively; the sedimentation zone is provided with a second gas stripping pipe and a sludge return pipe, the sludge return pipe is used for communicating the sedimentation zone and the denitrification selection zone, and the second gas stripping pipe is used for returning sludge to the denitrification selection zone through the sludge return pipe.

7. The sewage treatment apparatus according to claim 1, wherein the sedimentation zone is provided with a sludge discharge port for discharging soil in the sedimentation zone.

8. The sewage treatment apparatus according to claim 1, further comprising an equipment room, wherein the equipment room is adjacent to the anaerobic zone and the sedimentation zone, and a rotary fan and an electric control cabinet are installed in the equipment room.

9. The sewage treatment apparatus according to claim 1, wherein the sedimentation zone is connected with a water outlet pipe, an ultraviolet sterilizer is installed on the water outlet pipe, and the water outlet is discharged after being sterilized by the ultraviolet sterilizer.