CN209957457U

CN209957457U - Novel leachate low-consumption membrane biological reaction system

Info

Publication number: CN209957457U
Application number: CN201821231555.7U
Authority: CN
Inventors: 于玉彬; 徐融; 李欣; 刘小朋
Original assignee: Suzhou Su Ke Environmental Protection Technology Co Ltd
Current assignee: Suzhou Su Ke Environmental Protection Technology Co Ltd
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2020-01-17
Anticipated expiration: 2028-08-01

Abstract

The utility model discloses a novel filtration liquid membrane biological reaction system that consumes slowly, biological reaction system washes the device including good oxygen pond, MBR membrane module, aeration equipment, backwash device and medicine, the outlet pipe in good oxygen pond is connected with the lower part back flow of MBR membrane module, aeration equipment's aeration pipe is connected with the lower part air inlet of MBR membrane module, the medicine adds the pencil of washing the device and washes the backwash union coupling of device with the medicine, with the product water piping connection on MBR membrane module upper portion. The utility model discloses under the prerequisite of ensureing the higher flux of membrane equipment, reduced the condition of disconnected silk to and the volume of long-pending mud in the equipment cavity, increased its stability.

Description

Novel leachate low-consumption membrane biological reaction system

Technical Field

The utility model relates to a novel filtration liquid low consumption membrane biological reaction system.

Background

At present, the common characteristics of refractory organic wastewater such as landfill leachate, kitchen wastewater and the like are complex components and high treatment difficulty, and a treatment method of pretreatment, biochemical treatment and advanced treatment is usually adopted, wherein the advanced treatment is the key point and the difficulty of the current environmental protection requirement. In the deep treatment, the existing engineering mainly applies membrane technology (MBR), and compared with the traditional activated sludge method, the MBR has the characteristics of better water quality and system stability, high sludge concentration, low sludge discharge and low energy consumption.

MBR technology has been applied more and more in the fields of oily and difficult-to-biodegrade organic wastewater treatment, and has achieved good effects. According to different relative positions of the membrane component and the biological reaction tank, the membrane component can be divided into an immersion type and an external type, and products with wider application are respectively a curtain type hollow fiber membrane and an external tubular membrane. In the practical application process, the curtain type hollow fiber membrane and the external tubular membrane have respective advantages and disadvantages. Relatively speaking, the curtain type hollow fiber membrane has low investment and operation cost, but has the disadvantages of low operation flux, poor operation environment, large occupied area, easy accumulation and filament breakage of mud and inconvenient management of operation and maintenance, and high investment and operation cost although the external tubular membrane has high operation flux.

The optimization of the membrane bioreactor design and the improvement of the system improve the treatment efficiency of the high-difficulty organic wastewater and reduce the treatment cost, and is the key for promoting the development of the treatment technology.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel leachate low-consumption membrane biological reaction system and a method for treating organic sewage by using the same, aiming at the defects in the prior art.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the utility model provides a novel membrane biological reaction system that consumes slowly of filtration liquid, washes the device including good oxygen pond, MBR membrane module, aeration equipment, backwash device and medicine, the outlet pipe in good oxygen pond is connected with the lower part back flow of MBR membrane module, aeration equipment's aeration pipe is connected with the lower part air inlet of MBR membrane module, the medicine is washed the backwash pipe of device and backwash device and is connected with the product water mouth on MBR membrane module upper portion respectively.

Furthermore, a water outlet pipe of the aerobic tank is connected with the MBR membrane module sequentially through a water inlet pump and a filter.

Further, the aeration device comprises a rotary fan, and an air outlet of the rotary fan is connected with the MBR membrane module.

Furthermore, the backwashing device comprises a water production tank, and a backwashing pipe at the lower part of the water production tank is respectively connected with the water production port at the upper part of the MBR membrane component through a backwashing pump.

Furthermore, a water outlet at the upper part of the MBR membrane module is also connected with a water inlet at the upper part of the water production tank through a membrane system water production suction pump.

Further, an upper return port of the MBR membrane module is connected with the aerobic tank sequentially through an MBR membrane module mixed return pipe and an MBR membrane module return pipe; and the lower part return port of the MBR membrane module is connected with the aerobic tank through the MBR membrane module return pipe.

Further, the chemical washing device comprises an acid adding chemical box and an alkali adding chemical box, wherein the acid adding chemical box is connected with the acid adding chemical inlet pipe through an acid metering pump and converges into the backwashing pipe; the alkali adding medicine box is connected with the alkali adding medicine inlet pipe through an alkali type metering pump and converges into the backwashing pipe; the backwashing pipe is connected with the upper water producing port of the MBR membrane module.

Furthermore, pipeline flow meters, pressure gauges, automatic valves and pressure sensors are arranged on pipelines between the aerobic tank, the aeration device, the backwashing device, the medicine washing device and the MBR membrane module.

The utility model has the advantages that:

1) on the premise of ensuring higher flux of the membrane equipment, the condition of broken wires is reduced, the amount of accumulated mud in the cavity of the equipment is reduced, and the stability of the membrane equipment is improved.

2) The system does not need civil engineering, reduces the occupied area and effectively reduces the cost and the capital investment of the whole sewage treatment device.

3) The device is closed, so that the problem of outward dispersion of foam and peculiar smell is fundamentally solved, and the environment of a project site is improved.

4) The automation is realized in the operation process of the equipment, the manual operation is reduced, the maintenance is convenient, and the management difficulty and the labor input are greatly reduced.

5) The equipment reduces energy consumption to a certain extent and reduces operation cost.

6) The equipment is convenient to install and can be completely produced in a complete set.

Drawings

FIG. 1 is a schematic view of the process of the present invention.

In the figure: 1. a system water inlet pipe; 2. an aerobic tank; 3. a water outlet pipe of the aerobic tank; 4. a water inlet pump; 5. a filter; 6. an MBR membrane module; 7. mixing and returning a Membrane Bioreactor (MBR) membrane module; 8. a return pipe of the MBR membrane module; 9. a rotary fan; 10. a pipeline flow meter; 11. a pressure gauge; 12. an automatic valve; 13. an aeration pipe; 14. a pressure sensor; 15. a water outlet pipe of the MBR membrane module; 16. a membrane system produced water suction pump; 17. a water production pipe b; 18. a water production pipe a; 19. a water inlet pipe of the water production tank; 20. a water production tank; 21. a backwash pump; 22. adding an acid agent box; 23. an acid metering pump; 24. adding acid into the medicine inlet pipe; 25. adding an alkali agent box; 26. an alkaline metering pump; 27. adding alkali into the medicine inlet pipe; 28. backwashing the tubes; 29. a high-level overflow pipe of the water production tank; 30. a water outlet pipe of the water production tank; 31. and (5) discharging a water pipe of the system.

Detailed Description

FIG. 1 shows, discloses a novel membrane biological reaction system that consumes slowly of leachate, including good oxygen pond, MBR membrane module, aeration equipment, backwash device and medicine washing device, the outlet pipe of good oxygen pond is connected with the lower part back flow of MBR membrane module, aeration equipment's aeration pipe is connected with the lower part air inlet of MBR membrane module, the medicine of medicine washing device pipe and backwash device's backwash pipe respectively with the MBR membrane module upper portion produce the water mouth and be connected.

The further proposal is that a water outlet pipe of the aerobic tank is connected with the MBR membrane module sequentially through a water inlet pump and a filter. The aeration device comprises a rotary fan, and an air outlet of the rotary fan is connected with the MBR membrane module. The backwashing device comprises a water production tank, wherein a backwashing pipe at the lower part of the water production tank is respectively connected with a water production port at the upper part of the MBR membrane component through a backwashing pump. The further scheme is that a water outlet at the upper part of the MBR membrane module is also connected with a water inlet at the upper part of the water production tank through a membrane system water production suction pump. The upper reflux port of the MBR membrane module is connected with the aerobic tank sequentially through an MBR membrane module mixed reflux pipe and an MBR membrane module reflux pipe; and the lower part return port of the MBR membrane module is connected with the aerobic tank through the MBR membrane module return pipe. The device comprises an acid adding medicine box and an alkali adding medicine box, wherein the acid adding medicine box is connected with an upper water producing port of the MBR membrane module through an acid metering pump; and the alkali adding agent box is connected with the upper water producing port of the MBR membrane module through an alkali type metering pump. The further proposal is that pipelines between the aerobic tank, the aeration device, the backwashing device and the MBR membrane component and pipelines between the drug washing device and the MBR membrane component are all provided with a pipeline flowmeter, a pressure gauge, an automatic valve and a pressure sensor.

In addition, the utility model also relates to a method for treating organic sewage based on the low-consumption membrane biological reaction system for percolate, which comprises the following steps:

and (3) purifying treatment: wastewater enters an aerobic tank 2 through a system water inlet pipe 1, aerobic reaction is completed in the aerobic tank 2, and a water inlet pump 4 extracts primarily treated wastewater from the aerobic tank 2, passes through a filter 5 and then enters a special MBR (membrane bioreactor) membrane component 6. And further removing particles, colloid, bacteria, heat sources and high molecular organic substances in the wastewater in a special MBR membrane module 6. The MBR membrane bioreactor is a closed cavity, so that foam and peculiar smell generated by aeration are prevented from drifting along with wind, and a good equipment operation environment is ensured.

Water production: at the initial operation stage of the system or after the membrane module is cleaned, the outlet water of the membrane module can be connected to the inlet pipe 19 of the water production tank through the water production pipe a18 and directly enters the water production tank 20. After the membrane silk dirt is accumulated, the membrane module effluent is pumped into a water production pipe b17 by a membrane system water production suction pump 16 and then enters a water production tank 20 through a water production tank inlet pipe 19. The effluent of the system which reaches the standard can be discharged through a water outlet pipe 31 of the system through a water outlet pipe 30 of the water production tank. When the water amount in the water production tank exceeds the warning water level, the outlet water is discharged through a high-level overflow pipe of the water production tank through a system water outlet pipe 31.

Aeration and sludge backflow steps: when membrane filtration is carried out, air enters the special MBR membrane module 6 through the aeration pipe by the rotary fan 9, the membrane filaments vibrate to remove dirt attached to the surfaces of the membrane filaments while oxygen is provided for microorganisms, mixed gas-liquid-solid three-phase mixed liquid is converged into an MBR membrane module backflow pipe 8 to flow back to the aerobic tank 2 through an MBR membrane module mixed backflow pipe 7 at the top of the special MBR membrane module 6, and sludge deposited in the special MBR membrane module 6 directly flows back to the aerobic tank 2 through the MBR membrane module backflow pipe 8. The aeration device connected with the bottom of the membrane component is utilized to shake membrane filaments in the MBR membrane component to remove dirt on the surfaces of the membrane filaments, and simultaneously, a water-sludge mixture generated after aeration flows back to the aerobic tank, so that the oxygen content and the activated sludge content of the aerobic tank are increased, the energy consumption is saved, and the operation efficiency of the equipment is improved.

And (3) backwashing: and (5) stopping water production of the MBR membrane system, and backwashing at a stop ratio of 9: 1. The water produced by the system is extracted from a water production tank 20 to a water outlet pipe of an MBR membrane component by a backwashing pump 21, enters a special MBR membrane component, washes membrane filaments, and the mixed liquid after backwashing flows back to the aerobic tank 2.

The steps of medicine washing are as follows: when the system runs for 1-3 months, the MBR membrane system stops producing water, the medicine is washed, acid liquor is arranged in an acid adding medicine box 22 and is lifted to a backwashing pipe 28 through an acid adding medicine inlet pipe 24 by an acid metering pump 23, then alkali liquor is arranged in an alkali adding medicine box 25 and is lifted to the backwashing pipe 28 through an alkali adding medicine inlet pipe 27 by an alkali metering pump 26.

The cleaning of the equipment is completed in the membrane module shell without additionally arranging a cleaning pool, thereby greatly reducing the possibility of mud accumulation and the occupied area of the equipment.

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

Claims

1. The utility model provides a novel filtration liquid membrane biological reaction system that consumes slowly, its characterized in that, including good oxygen pond, MBR membrane module, aeration equipment, backwash device and medicine washing device, the outlet pipe of good oxygen pond is connected with the lower part back flow of MBR membrane module, aeration equipment's aeration pipe is connected with the lower part air inlet of MBR membrane module, the medicine of medicine washing device is managed and the backwash pipe of backwash device and is connected with the product water mouth on MBR membrane module upper portion respectively.

2. The novel leachate low consumption membrane biological reaction system of claim 1, wherein the outlet pipe of the aerobic tank is connected with the MBR membrane module sequentially through a water inlet pump and a filter.

3. The novel leachate low consumption membrane biological reaction system of claim 1, wherein the aeration device comprises a rotary fan, and an air outlet of the rotary fan is connected with the MBR membrane module.

4. The novel leachate low consumption membrane biological reaction system of claim 1, wherein the backwashing device comprises a water production tank, and a lower backwashing pipe of the water production tank is respectively connected with an upper water production port of the MBR membrane module through a backwashing pump.

5. The novel leachate low consumption membrane biological reaction system of claim 4, wherein the upper water production port of the MBR membrane module is further connected with the upper water inlet of the water production tank through a membrane system water production suction pump.

6. The novel leachate low consumption membrane biological reaction system of claim 1, wherein the upper return port of the MBR membrane module is connected with the aerobic tank sequentially through an MBR membrane module mixed return pipe and an MBR membrane module return pipe; and the lower part return port of the MBR membrane module is connected with the aerobic tank through the MBR membrane module return pipe.

7. The novel leachate low consumption membrane biological reaction system of claim 1, wherein the chemical washing device comprises an acid dosing tank and an alkali dosing tank, wherein the acid dosing tank is connected with the acid dosing inlet pipe through an acid metering pump and is converged into a backwashing pipe; the alkali adding medicine box is connected with the alkali adding medicine inlet pipe through an alkali type metering pump and converges into the backwashing pipe; the backwashing pipe is connected with the upper water producing port of the MBR membrane module.

8. The novel leachate low consumption membrane biological reaction system of any one of claims 1 to 7, wherein the pipeline between the aerobic tank, the aeration device, the backwashing device and the drug washing device and the MBR membrane module is provided with a pipeline flowmeter, a pressure gauge, an automatic valve and a pressure sensor.