CN217418449U

CN217418449U - Advanced treatment device for domestic sewage with low carbon-nitrogen ratio

Info

Publication number: CN217418449U
Application number: CN202220061527.5U
Authority: CN
Inventors: 张士超; 李思媛; 孙铭; 薛强; 牛宇锟; 沈骏; 孙广合; 韩怀亮
Original assignee: Beijing China Railway Science Energy Conservation And Environmental Protection New Technology Co ltd; Tieke Energy Saving And Environmental Protection Technology Co ltd; China Academy of Railway Sciences Corp Ltd CARS; Energy Saving and Environmental Protection and Occupational Safety and Health Research of CARS
Current assignee: Beijing China Railway Science Energy Conservation And Environmental Protection New Technology Co ltd; Tieke Energy Saving And Environmental Protection Technology Co ltd; China Academy of Railway Sciences Corp Ltd CARS; Energy Saving and Environmental Protection and Occupational Safety and Health Research of CARS
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-09-13
Anticipated expiration: 2032-01-11

Abstract

The utility model relates to an advanced treatment device for domestic sewage with low carbon-nitrogen ratio, which belongs to the technical field of sewage treatment and comprises a water inlet pipe, a basket type fine grid, an anaerobic zone, an MABR membrane zone, a process fan, a mixing fan, an MABR membrane component, an aerobic zone, an air blower, a secondary sedimentation tank, a water outlet pipe, an aeration pipe, a sludge pipe, a return sludge pipe and a residual sludge pipe; the water inlet pipe is connected with the anaerobic zone, the basket type fine grid is positioned at the water inlet of the anaerobic zone, one side of the bottom of the anaerobic zone is provided with a water outlet communicated with an adjacent MABR membrane zone, the MABR membrane zone is connected with the aerobic zone, the bottom of the aerobic zone is provided with an aeration pipe, the aerobic zone is also provided with a blower connected with the aeration pipe, the upper part of one side of the aerobic zone is provided with a water outlet connected with the secondary sedimentation tank, and the upper part of one side of the secondary sedimentation tank is provided with a water outlet pipe. The device of the utility model has the advantages of high efficiency, economy, good denitrification and dephosphorization effect, stable operation, high automatic management degree and simple operation maintenance.

Description

Advanced treatment device for domestic sewage with low carbon-nitrogen ratio

Technical Field

The utility model relates to a domestic sewage advanced treatment unit, in particular to railway station section low carbon nitrogen ratio domestic sewage's advanced treatment unit along line belongs to sewage treatment technical field.

Background

Along with the rapid development of railway construction in China, more than 5000 railway stations are provided, most of the railway stations are middle and small stations along the railway, and the railway stations are located in remote areas and are far away from cities, and a matched municipal sewage collecting and treating system is lacked at the periphery, so that the sewage treatment system is very necessary for discharging the sewage after reaching the standard.

Domestic sewage at stations along the railway line in China has the characteristics of point polydispersion, small sewage quantity, large water quality fluctuation, low carbon-nitrogen ratio, high ammonia nitrogen concentration and the like.

At present, the traditional biological treatment processes mainly comprising SBR (Sequencing Batch Reactor Activated Sludge Process), MBR (Membrane Bioreactor), contact oxidation and the like are mostly adopted for treating the sewage of the railway line station section in China, but the processes often have the problems of poor denitrification and dephosphorization effects, high operating cost, substandard sewage treatment, complex management and the like, so the existing technology is difficult to meet the standard requirement of the advanced treatment of the domestic sewage of the railway line station section.

In the existing domestic sewage advanced treatment transformation and new construction projects of stations along the railway, a domestic sewage advanced treatment device which is strong in pertinence, efficient, economical, good in nitrogen and phosphorus removal effect, stable in operation, high in automatic management degree and simple in operation and maintenance is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low carbon nitrogen ratio domestic sewage's advanced treatment unit, with strong points, high-efficient economy, the denitrogenation dephosphorization is effectual, the operation is stable, the degree of automation is high and the operation maintenance is simple.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a low carbon nitrogen ratio domestic sewage's deep processing device which characterized in that: comprises a water inlet pipe, a basket type fine grid, an anaerobic zone, an MABR membrane zone, a process fan, a mixing fan, an MABR membrane component, an aerobic zone, a blower, a secondary sedimentation tank, a water outlet pipe, an aeration pipe, a sludge pipe, a return sludge pipe and a residual sludge pipe; the water inlet pipe is connected with the anaerobic zone, the basket type fine grid is positioned at the water inlet of the anaerobic zone, one side of the bottom of the anaerobic zone is provided with a water outlet communicated with an adjacent MABR membrane zone, the MABR membrane zone is connected with the aerobic zone, the bottom of the aerobic zone is provided with an aeration pipe, the aerobic zone is also provided with a blower connected with the aeration pipe, the upper part of one side of the aerobic zone is provided with a water outlet connected with the secondary sedimentation tank, and the upper part of one side of the secondary sedimentation tank is provided with a water outlet pipe.

Preferably, the MABR membrane area is provided with two areas, one MABR membrane area and the other MABR membrane area, an MABR membrane module and an aerator pipe are respectively arranged in the MABR membrane area and the MABR membrane area, the process fan is connected with the MABR membrane modules in the MABR membrane area and the MABR membrane area through air pipelines, the mixing fan is connected with the aerator pipes at the bottoms of the MABR membrane area and the MABR membrane area through another air pipeline, and a water outlet is arranged at the bottom of one side of the MABR membrane area and connected with the aerobic area.

Preferably, the bottom of the anaerobic zone is provided with a submerged flow stirrer.

Preferably, the secondary sedimentation tank adopts an inclined tube type sedimentation tank.

Preferably, the bottom of the secondary sedimentation tank is provided with a sludge pipe, the sludge pipe is respectively connected with a sludge return pipe and a residual sludge pipe, the other end of the sludge return pipe is communicated to the water inlet end of the device, and the other end of the sludge return pipe is respectively connected with the sludge pipe and the residual sludge pipe.

Preferably, the aerobic zone is provided with an aeration pipe.

Preferably, the advanced treatment device for the domestic sewage with the low carbon nitrogen ratio integrates the treatment units into a box body, and the occupied area is small.

Preferably, the advanced treatment device for domestic sewage with low carbon-nitrogen ratio can change the tank volume of the corresponding treatment tank (anaerobic zone, MABR membrane zone, aerobic zone and secondary sedimentation tank) according to the water quality condition, flexibly configures the number of the MABR membrane modules, and is suitable for performing distributed treatment on sewage in railway line station sections with large water quality fluctuation.

Has the advantages that:

the utility model discloses an advanced treatment unit of low carbon nitrogen ratio domestic sewage, high-efficient economy, denitrogenation dephosphorization are effectual, the operation is stable, the degree of automation is high and the operation maintenance is simple.

The invention is further illustrated by the accompanying drawings and the detailed description, which are not meant to limit the scope of the invention.

Drawings

FIG. 1 is a schematic structural view of an advanced treatment apparatus for domestic sewage with low carbon-nitrogen ratio in embodiment 1 of the present invention.

The main part names are as follows:

1 water inlet pipe and 2 lifting basket type fine grids

3 anaerobic zone 301 underflow agitator

4 MABR membrane one-zone 401 process fan

402 mixed fan 403 MABR membrane module

404 first air duct 405 second air duct

406 first aeration pipe 5 MABR film second area

6 good oxygen district 601 air-blower

602 third air conduit 603 second aerator pipe

7 water outlet pipe of settling tank 8

9 sludge pipe 901 return sludge pipe

902 excess sludge pipe

Detailed Description

Unless otherwise stated, all the parts used in the present invention are commercially available parts which are conventional in the art, and the connection mode is the conventional connection mode in the art; the materials used are conventional in the art.

Example 1

As shown in fig. 1, it is a schematic structural diagram of an advanced treatment device for domestic sewage with low carbon-nitrogen ratio in embodiment 1 of the present invention; wherein, 1 is a water inlet pipe, 2 is a basket type fine grid, 3 is an anaerobic zone, 301 is a subsurface flow stirrer, 4 is an MABR membrane first zone, 401 is a process fan, 402 is a mixing fan, 403 is an MABR membrane component, 404 is a first air pipeline, 405 is a second air pipeline, 5 is an MABR membrane second zone, 6 is an aerobic zone, 601 is a blower, 602 is a third air pipeline, 603 is a third aeration pipe, 7 is a secondary sedimentation tank, 8 is a water outlet pipe, 9 is a sludge pipe, 901 is a return sludge pipe, and 902 is a residual sludge pipe;

the utility model discloses an advanced treatment unit of low carbon nitrogen ratio domestic sewage includes: the system comprises a water inlet pipe 1, a basket type fine grid 2, an anaerobic zone 3, a submerged flow stirrer 301, an MABR membrane first zone 4, a process fan 401, a mixing fan 402, an MABR membrane component 403, a first air pipeline 404, a second air pipeline 405, an MABR membrane second zone 5, an aerobic zone 6, a blower 601, a third air pipeline 602, a third aeration pipe 603, a secondary sedimentation tank 7, a water outlet pipe 8, a sludge pipe 9, a return sludge pipe 901 and a residual sludge pipe 902; wherein the water inlet pipe 1 is connected with the anaerobic zone 3, the basket type fine grid 2 is positioned at the water inlet of the anaerobic zone 3, one side of the bottom of the anaerobic zone 3 is provided with a water outlet which is communicated with an adjacent MABR membrane first zone 4, the upper part of one side of the MABR membrane first zone 4 is connected with an MABR membrane second zone 5 through the water outlet, the MABR membrane second zone 5 and the MABR membrane first zone 4 have the same structure, the MABR membrane component 403 is arranged in the MABR membrane first zone 4, the bottom of the MABR membrane second zone 5 is also provided with the MABR membrane component (not shown) and an aeration pipe (not shown), the process fan 401 is connected with the MABR membrane component 403 of the MABR membrane first zone 4 through a first air pipeline 404 and is also connected with the MABR membrane component (not shown) of the MABR membrane second zone 5, the mixing fan 402 is connected with a first aeration pipe 406 at the bottom of the MABR membrane first zone 4 through a second air pipeline 405 and is also connected with the aeration pipe of the MABR second zone 5, the lower part of one side of the MABR second area 5 is provided with a water outlet which is connected with the aerobic area 6; the bottom of the aerobic zone 6 is provided with a second aeration pipe 603, the aerobic zone 6 is also provided with an air blower 601 connected with the second aeration pipe 603, the upper part of one side of the aerobic zone 6 is provided with a water outlet connected with a secondary sedimentation tank 7, the upper part of one side of the secondary sedimentation tank 7 is provided with a water outlet pipe 8, the bottom of the secondary sedimentation tank 7 is provided with a sludge pipe 9, the sludge pipe 9 is respectively connected with a sludge return pipe 901 and a residual sludge pipe 902, the other end of the sludge return pipe 901 is communicated to the water inlet end of the device, the other end of the sludge return pipe 901 is respectively connected with the sludge pipe 9 and the residual sludge pipe 902, and the effluent of the water outlet pipe 8 is discharged after reaching the standard.

Further, a submerged agitator 301 is installed at the bottom of the anaerobic zone 3.

Further, an aeration membrane module 403 is installed in the first MABR membrane zone 4, and the process fan 401 is connected with the MABR membrane module 403 through a first air pipeline 404; the first aeration pipe 406 is arranged at the bottom of the first MABR membrane zone 4, and the mixing fan 402 is connected with the first aeration pipe 406 at the bottom of the first MABR membrane zone 4 through a second air pipeline 405.

Further, the MABR membrane module 403 uses an air source.

Further, a second aeration pipe 603 is installed in the aerobic zone 6, and the blower 601 is connected to the second aeration pipe 603 through a third air pipe 602.

Further, the secondary sedimentation tank 7 adopts an inclined tube type sedimentation tank; the bottom of the tank body is provided with a sludge pipe 9, wherein a part of sludge flows back to the water inlet through a sludge return pipe 901, and the rest sludge is discharged outside through a rest sludge pipe 902.

The utility model discloses a low carbon nitrogen ratio domestic sewage's advanced treatment unit's concrete process as follows:

(1) raw water enters an anaerobic zone 3 through a water inlet pipe 1, wherein a basket type fine grid 2 is arranged at a water inlet of the anaerobic zone 3 and is used for deeply removing suspended matters and fiber substances in a water body;

(2) the effluent of the anaerobic zone 3 enters an MABR membrane first zone 4 and an MABR membrane second zone 5 for synchronous nitrification and denitrification reaction, and is mainly used for removing pollutants such as total nitrogen, COD and the like in a water body; wherein, the gas required by the MABR membrane module 403 is an air source and is mainly conveyed by a process fan 401 through a first air pipeline 404; mixing sludge in the water body of the MABR membrane first area 4 and the water body of the MABR membrane second area 5 and updating sludge on the membrane surface layer, and mainly stirring by a mixing fan 402 through a bottom aeration pipe;

(3) the effluent of the second MABR membrane zone 5 enters an aerobic zone 6, which is mainly used for carrying out nitration reaction and further removing organic pollution such as ammonia nitrogen in water, the bottom of the aerobic zone 6 is provided with a second aeration pipe 603, and air is provided by an air blower 601;

(4) the effluent of the aerobic zone 6 enters a secondary sedimentation tank 7 for sludge-water separation, and the supernatant is discharged through a water outlet pipe 8; the bottom is provided with a sludge pipe 9, wherein a part of sludge flows back to the water inlet through a sludge return pipe 901 for supplementing the sludge of the system, and the rest sludge is discharged through a residual sludge pipe 901 for treatment.

The utility model discloses a low carbon nitrogen ratio domestic sewage's deep treatment device's specific beneficial effect as follows:

(1) the utility model discloses an advanced treatment unit of low carbon nitrogen ratio domestic sewage, through adopting the equipment that uses MABR as the core, solved and generally adopted in the present railway trade behind the traditional biological treatment process that gives first place to SBR, MBR and contact oxidation etc. as, the still problem such as poor, the working costs height of denitrogenation dephosphorization effect that still exists, sewage treatment is not up to standard and the management is more complicated especially to the problem that does not have the emission of going that involves in the railway line station section domestic sewage treatment;

(2) the MABR membrane area forms the heterotropic mass transfer effect of oxygen and pollutants through the dual functions of oxygen supply and biomembrane carrier of the aeration membrane component, realizes synchronous nitrification and denitrification, has high oxygen utilization efficiency, does not need to be provided with an internal reflux system, has the characteristics of low energy consumption, impact load resistance, high nitrogen and phosphorus removal efficiency, remote monitoring, convenient operation and maintenance management and the like, is suitable for the deep treatment engineering of low carbon-nitrogen ratio domestic sewage in railway sections along the railway, and realizes the unification of social and economic benefits and environmental benefits.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a low carbon nitrogen ratio domestic sewage's deep processing device which characterized in that: comprises a water inlet pipe, a basket type fine grid, an anaerobic zone, an MABR membrane zone, a process fan, a mixing fan, an MABR membrane component, an aerobic zone, a blower, a secondary sedimentation tank, a water outlet pipe, an aeration pipe, a sludge pipe, a return sludge pipe and a residual sludge pipe; the water inlet pipe is connected with the anaerobic zone, the basket type fine grid is positioned at the water inlet of the anaerobic zone, one side of the bottom of the anaerobic zone is provided with a water outlet communicated with an adjacent MABR membrane zone, the MABR membrane zone is connected with the aerobic zone, the bottom of the aerobic zone is provided with an aeration pipe, the aerobic zone is also provided with a blower connected with the aeration pipe, the upper part of one side of the aerobic zone is provided with a water outlet connected with the secondary sedimentation tank, and the upper part of one side of the secondary sedimentation tank is provided with a water outlet pipe.

2. The advanced treatment device for low carbon-nitrogen ratio domestic sewage according to claim 1, characterized in that: the MABR membrane area is provided with two areas, one MABR membrane area is an MABR membrane area II, MABR membrane modules and aeration pipes are arranged in the MABR membrane area I and the MABR membrane area II, a process fan is connected with the MABR membrane modules in the MABR membrane area I and the MABR membrane area II through air pipelines, a mixing fan is connected with the aeration pipes at the bottoms of the MABR membrane area I and the MABR membrane area II through another air pipeline, and a water outlet is formed in the bottom of one side of the MABR membrane area II and connected with the aerobic area.

3. The advanced treatment device for low carbon-nitrogen ratio domestic sewage according to claim 2, characterized in that: and a submerged flow stirrer is arranged at the bottom of the anaerobic zone.

4. The advanced treatment device for low carbon-nitrogen ratio domestic sewage according to claim 3, characterized in that: the bottom of secondary sedimentation pond is equipped with the sludge pipe, and the sludge pipe is connected with mud back flow and excess sludge pipe respectively, and the other end intercommunication of mud back flow is to the device end of intaking, and the other end of mud back flow is connected with mud pipe and excess sludge pipe respectively.

5. The advanced treatment device for low carbon-nitrogen ratio domestic sewage according to claim 4, characterized in that: the secondary sedimentation tank adopts an inclined tube type sedimentation tank.