CN113716684A - Side-arranged multi-stage internal pressure cross flow membrane bioreactor and ultra-micro filtration device - Google Patents

Side-arranged multi-stage internal pressure cross flow membrane bioreactor and ultra-micro filtration device Download PDF

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CN113716684A
CN113716684A CN202111149127.6A CN202111149127A CN113716684A CN 113716684 A CN113716684 A CN 113716684A CN 202111149127 A CN202111149127 A CN 202111149127A CN 113716684 A CN113716684 A CN 113716684A
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water
membrane
ultra
internal pressure
microporous
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张旭辉
张春媛
蔡彬彬
郭荣清
黄建忠
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Inner Mongolia Mengyi Environmental Protection Technology Co ltd
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Inner Mongolia Mengyi Environmental Protection Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

本发明公开了一种旁置多级内压错流膜生物反应器暨超微滤装置，涉及生活或工业污水的膜生物水处理或微孔过滤技术领域。该旁置多级内压错流膜生物反应器暨超微滤装置，包括：进水口，用于输入经过生化处理后的来水或需要微孔过滤的来水；出水口，输出滤清后的水；浓水排出口，用于浓水排出；反冲洗口，用于微孔滤膜反清洗；出水电磁阀与反冲洗电磁阀，用于微孔滤膜反冲洗控制；封管，用于封装微孔滤膜；微孔滤膜，用于含活性污泥及悬浮物截留及滤水。与现有技术相比，本发明的有益效果是：采用旁路配置方式，实现膜生物反应器的安装方式多样化，并通过微孔滤膜内表面错流过滤，阻止水中的悬浮物及细菌在微孔滤膜内表面聚集附着，极大简化了膜生物反应器的操作与维护方式，提高了产水率，大幅度降低了膜生物反应器的建设与运营成本。

Figure 202111149127

The invention discloses a side-mounted multi-stage internal pressure cross-flow membrane bioreactor and an ultra-microfiltration device, which relates to the technical field of membrane biological water treatment or micropore filtration of domestic or industrial sewage. The side-mounted multi-stage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device includes: a water inlet for inputting incoming water after biochemical treatment or incoming water requiring microfiltration; a water outlet for outputting after filtration The concentrated water discharge port is used for the concentrated water discharge; the backwash port is used for the backwashing of the microporous membrane; the outlet solenoid valve and the backwashing solenoid valve are used for the backwashing control of the microporous membrane; It is used for encapsulating microporous membranes; microporous membranes are used for the retention and filtration of activated sludge and suspended solids. Compared with the prior art, the beneficial effects of the present invention are: by adopting the bypass configuration mode, the installation modes of the membrane bioreactor are diversified, and the inner surface of the microporous filter membrane is cross-flow filtered to prevent the suspended solids and bacteria in the water. The accumulation and attachment on the inner surface of the microporous membrane greatly simplifies the operation and maintenance of the membrane bioreactor, improves the water production rate, and greatly reduces the construction and operation cost of the membrane bioreactor.

Figure 202111149127

Description

Side-arranged multi-stage internal pressure cross flow membrane bioreactor and ultra-micro filtration device
Technical Field
The invention relates to the technical field of membrane biological water treatment of domestic or industrial sewage, in particular to a Membrane Bioreactor (MBR) which adopts bypass configuration, adopts cross-flow filtration on the inner surface of a microporous filter membrane, does not need aeration and produces water in multiple stages.
Background
The traditional membrane bioreactor is arranged in a membrane tank and can replace a tail end secondary sedimentation tank in the biological treatment technology. The traditional membrane bioreactor utilizes negative pressure generated by top suction to produce water, the transmembrane pressure is generally 0.016-0.02 MPa, a continuous aeration intermittent water production operation mode is generally adopted, and typical operation time is set as follows: filtration was carried out for 8 minutes, with 2 minutes off, every 12 hours, with 2 minutes back-wash, and on-line maintenance wash every 7 days for 25 minutes. The traditional membrane bioreactor needs to build a membrane pool and aerate at the bottom, the construction cost is very high, the general transmembrane pressure is less than 0.02MPa, the water yield is relatively low, frequent stop and backwashing are needed in the operation process, the operation rate is reduced, even if frequent backwashing is carried out, membrane filaments of the membrane bioreactor are inevitably polluted and blocked frequently, a module needs to be lifted out of the membrane pool frequently for cleaning or replacement, the workload of cleaning and maintenance or replacement of the module is very large, and the cost is also very high.
Disclosure of Invention
The present invention aims at providing a side-set multi-stage internal pressure cross-flow membrane bioreactor and ultra-micro filtration device to solve the above problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
an internal pressure cross-flow membrane bioreactor and ultra-micro filtration device, comprising:
the water inlet is used for inputting the incoming water after biochemical treatment or the incoming water needing micro-pore filtration;
a water outlet for outputting the filtered water;
a concentrated water outlet for discharging concentrated water;
a back washing port for back washing the microporous filter membrane;
the water outlet electromagnetic valve and the back washing electromagnetic valve are used for controlling the back washing of the microporous filter membrane;
the sealing tube is used for sealing the microporous filter membrane;
the microporous filter membrane is used for intercepting and filtering water containing activated sludge and suspended matters.
As a further proposal of the invention, the water inlet and the back flushing port of the internal pressure cross flow membrane bioreactor and the ultra-micro filtration device are arranged on one side, and the water outlet and the concentrated water outlet are arranged on the other side.
As a further proposal of the invention, the microporous filter membrane is packaged in a sealed pipe, the two ends of the sealed pipe are respectively provided with a water inlet and a concentrated water outlet, and the back washing port and the water outlet are respectively arranged on the outer wall of the sealed pipe close to the water inlet and the concentrated water outlet.
As a further scheme of the invention, the water outlet electromagnetic valve and the back flush electromagnetic valve control the back flush, when in normal operation, the incoming water enters the microporous filter membrane from the water inlet, one part of the incoming water enters the sealing pipe through the filter membrane and is discharged from the water outlet, and the other part of the incoming water is discharged from the concentrated water discharge outlet along the inner wall of the microporous filter membrane. During back flushing, the back flushing electromagnetic valve is opened, the water outlet electromagnetic valve is closed, and back flushing water reversely penetrates through the microporous filter membrane to be converged with raw water and is discharged from the concentrated water discharge port along the inner wall of the microporous filter membrane.
Compared with the prior art, the invention has the beneficial effects that: the membrane bioreactor provided by the invention adopts bypass configuration, a membrane pool is not needed, the installation mode of the membrane bioreactor is more diversified, and the construction, maintenance and operation cost is greatly reduced. The cross flow filtration on the inner surface of the microporous filter membrane is adopted, so that the activated sludge and suspended matters can be effectively prevented from being adhered to the inner surface of the microporous filter membrane, and a certain removing effect is realized on the activated sludge and suspended matters adhered to the inner surface of the microporous filter membrane. By adopting the internal pressure, the transmembrane pressure can be increased from less than 0.02MPa to more than 0.2MPa, which is equivalent to the transmembrane pressure increased by more than ten times, and the water yield of the membrane bioreactor can be greatly increased. The multi-stage cross flow is adopted, so that the use efficiency of the device is increased, the production efficiency is improved, and the continuous production is realized during backwashing, so that the water can be continuously produced.
Drawings
FIG. 1 is a schematic diagram of the structure of a single internal pressure cross-flow membrane bioreactor and an ultramicron device.
FIG. 2 is a schematic diagram of a side-mounted multi-stage internal pressure cross-flow membrane bioreactor and ultra-micro filtration device.
In the figure: 1-water inlet, 2-concentrated water outlet, 3-back flushing port, 4-water outlet, 5-sealing pipe, 6-microporous filter membrane 7-back flushing electromagnetic valve, 8-water outlet electromagnetic valve, 9-primary water inlet header pipe, 10, primary concentrated water outlet and secondary water inlet communicating pipe, 11-secondary concentrated water outlet and tertiary water inlet communicating pipe, 12-back flushing water pipe, 13-water production pipe, 14-raw water pump 15-biochemical reaction tank
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, the single internal pressure cross flow membrane bioreactor and ultramicron device includes:
the water inlet 1 is used for inputting incoming water after biochemical treatment or incoming water needing micro-pore filtration;
a water outlet 4 for outputting the filtered water;
a concentrated water discharge port 2 for discharging concentrated water;
a back washing port 3 for back washing the microporous filter membrane;
the water outlet electromagnetic valve 8 and the back washing electromagnetic valve 7 are used for controlling the back washing of the microporous filter membrane;
a sealing tube 5 for sealing the microporous filter membrane;
and the microporous filter membrane 6 is used for intercepting and filtering water containing activated sludge and suspended matters.
Furthermore, the water inlet 1 and the back flushing port 3 of the internal pressure cross flow membrane bioreactor and ultra-micro filtration device are arranged on one side, and the water outlet 4 and the concentrated water outlet 2 are arranged on the other side.
Further, the microporous filter membrane 6 is packaged in a sealing pipe 5, the two ends of the sealing pipe are respectively provided with a water inlet 1 and a concentrated water discharge port 2, and the back washing port 3 and the water outlet 4 are respectively arranged at the positions, close to the water inlet 1 and the concentrated water discharge port 2, of the outer wall of the sealing pipe 5.
Furthermore, a water outlet electromagnetic valve 8 and a back washing electromagnetic valve 7 control back washing, when the device is in normal operation, incoming water enters the microporous filter membrane 6 from the water inlet 1, part of the incoming water enters the sealing pipe 5 through the filter membrane and is discharged from the water outlet 4, and the other part of the incoming water is discharged from the concentrated water discharge port 2 along the inner wall of the microporous filter membrane 6. During back flushing, the back flushing electromagnetic valve 7 is opened, the water outlet electromagnetic valve 8 is closed, and back flushing water reversely penetrates through the filter membrane to be converged with raw water and is discharged from the concentrated water discharge port 2 along the inner wall of the microporous filter membrane 6.
In this embodiment, please refer to fig. 2, the embodiment includes three-stage cross flow, the first-stage cross flow in the embodiment includes 4 monomer devices, the second-stage cross flow includes 2 monomer devices, and the third-stage cross flow includes one monomer device, wherein the water inlets of the four monomer devices in the first stage are all from the first-stage water inlet header pipe 9, the first-stage 4 monomer devices and the second-stage 2 monomer devices are communicated with the second-stage water inlet communicating pipe 10 through the first-stage concentrated water outlet, and the second-stage 2 monomer devices and the third-stage 1 monomer devices are communicated with the third-stage water inlet communicating pipe 11 through the second-stage concentrated water outlet.
Further, when the whole device is operated, water in the biochemical reaction tank 15 is pumped into the primary water inlet header pipe 9 through the raw water pump 14 and enters the microporous filter membrane through the water inlet of the first-stage 4 monomer devices, one part of the incoming water enters the sealing pipe through the filter membrane and is discharged from the water outlet to enter the water production pipe 13, and the other part of the incoming water is discharged from the concentrated water outlet along the inner wall of the microporous filter membrane and enters the primary concentrated water outlet and the secondary water inlet communicating pipe 10. In turn, the water entering the first-stage concentrated water outlet and second-stage water inlet communicating pipe 10 enters the microporous filter membrane through the water inlet of the second-stage 2 monomer devices, a part of the water enters the sealing pipe through the filter membrane and is discharged from the water outlet into the water production pipe 13, and the other part of the water is discharged from the concentrated water outlet along the inner wall of the microporous filter membrane and enters the second-stage concentrated water outlet and third-stage water inlet communicating pipe 11. Finally, the water entering the second-stage concentrated water discharge port and the third-stage water inlet communicating pipe 11 enters the microporous filter membrane through the water inlet of the three-stage 1 monomer device, one part of the water enters the sealing pipe through the filter membrane and is discharged from the water outlet to enter the water production pipe 13, and the other part of the water is discharged from the concentrated water discharge port along the inner wall of the microporous filter membrane to enter the biochemical reaction tank 15.
Furthermore, the back washing of each stage of monomer device can be carried out on line, and the whole device is not required to be stopped. When any monomer device needs backwashing, the backwashing electromagnetic valve of the monomer device is opened, the water outlet electromagnetic valve is closed, and backwashing water reversely penetrates through the filter membrane to be converged with raw water and is discharged from the concentrated water discharge port along the inner wall of the microporous filter membrane.
The working principle of the invention is as follows: after water in the biochemical reaction tank enters the primary water inlet main pipe 9, under the pump pressure of the raw water pump 14, part of water enters the sealing pipe through the filter membrane and is converged into the water production pipe 13 through the water outlet to be discharged, and the other part of water is discharged from the concentrated water discharge outlet along the inner wall of the microporous filter membrane, so that the activated sludge and suspended matters in the raw water can be prevented from adhering to the inner surface of the microporous filter membrane by cross flow generated in the microporous filter membrane. The pump pressure provided by the raw water pump 14 can generate the required transmembrane pressure, and the water yield of the microporous filter membrane is improved. By-pass configuration and multistage installation mode are adopted, a membrane pool is not needed, continuous water production can be realized, and the method can also be applied to general high-precision microporous filtration treatment.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1.一种旁置多级内压错流膜生物反应器暨超微滤装置，其特征在于：1. a side-placed multistage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device, is characterized in that: 该旁置多级内压错流膜生物反应器暨超微滤装置，包括：The side-mounted multi-stage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device includes: 进水口，用于输入经过生化处理后的来水或需要微孔过滤的来水；The water inlet is used to input the incoming water after biochemical treatment or the incoming water requiring microfiltration; 出水口，输出滤清后的水；Water outlet, output filtered water; 浓水排出口，用于浓水排出；Concentrated water discharge port, used for concentrated water discharge; 反冲洗口，用于微孔滤膜反清洗；Backwash port for backwashing microporous membrane; 出水电磁阀与反冲洗电磁阀，用于微孔滤膜反冲洗控制；Outlet solenoid valve and backwash solenoid valve are used for microporous membrane backwash control; 封管，用于封装微孔滤膜；Sealed tubes for encapsulating microporous membranes; 微孔滤膜，用于含活性污泥及悬浮物截留及滤水。Microporous membrane for retention and water filtration containing activated sludge and suspended solids. 2.根据权利要求1所述旁置多级内压错流膜生物反应器暨超微滤装置，其特征在于，进水口与反冲洗口在一侧，出水口与浓水排出口在另外一侧。2. The multistage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device of claim 1, wherein the water inlet and the backwashing port are on one side, and the water outlet and the concentrated water outlet are on the other side. side. 3.根据权利要求1所述旁置多级内压错流膜生物反应器暨超微滤装置，其特征在于，微孔滤膜封装在封管中，封管的两端分别是进水口和出水口，出水口和浓水排出口设置在封管外壁靠近两端端部位置。3. The multistage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device of claim 1, characterized in that, the microporous filter membrane is encapsulated in the sealing tube, and the two ends of the sealing tube are respectively the water inlet and the ultra-microfiltration device. The water outlet, the water outlet and the concentrated water outlet are arranged on the outer wall of the sealed pipe near the ends of both ends. 4.根据权利要求1所述旁置多级内压错流膜生物反应器暨超微滤装置，其特征在于，出水电磁阀和反冲洗电磁阀控制反清洗，正常运行时，来水由进水口进入微孔滤膜，一部分水透过滤膜进入封管由出水口排出，另外一部分顺着微孔滤膜内壁由浓水排出口排出。反冲洗时，反冲洗电磁阀打开，出水电磁阀关闭，反冲洗水反向透过微孔滤膜与原水汇合并顺着微孔滤膜内壁由浓水排出口排出。4. The multistage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device of claim 1, wherein the water outlet solenoid valve and the backwash solenoid valve control backwashing, and during normal operation, the incoming water is The water inlet enters the microporous filter membrane, part of the water permeates the filter membrane into the sealing tube and is discharged from the water outlet, and the other part is discharged from the concentrated water discharge port along the inner wall of the microporous filter membrane. During backwashing, the backwashing solenoid valve is opened, the water outlet solenoid valve is closed, the backwashing water passes through the microporous filter membrane in reverse and joins with the raw water, and is discharged from the concentrated water outlet along the inner wall of the microporous filter membrane. 5.根据权利要求1所述旁置多级内压错流膜生物反应器暨超微滤装置，其特征在于，多个单体内压错流膜生物反应器暨超微滤装置可组成多级，上一级产生的浓水可以作为原水进入下一级，每一级都可以独立控制并实现在线反冲洗。5. according to the described multistage internal pressure cross-flow membrane bioreactor and ultra-microfiltration device of claim 1, it is characterized in that, a plurality of monomer internal pressure cross-flow membrane bioreactors and ultra-microfiltration device can be composed of multi-stage , the concentrated water produced by the previous stage can be used as raw water to enter the next stage, and each stage can be independently controlled and online backwashing can be realized.
CN202111149127.6A 2021-09-29 2021-09-29 Side-arranged multi-stage internal pressure cross flow membrane bioreactor and ultra-micro filtration device Pending CN113716684A (en)

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Application publication date: 20211130