CN201098608Y - Integrated membrane filter and its filtration system - Google Patents

Abstract

Integrated membrane filters and filtration systems for wastewater treatment. The raw water enters the integrated membrane filter after pretreatment, including the submerged hollow fiber membrane module, the upper orifice plate, the lower orifice plate, the water inlet pipe, the water production pipe and the air inlet pipe, etc. The membrane module is a columnar or curtain-type membrane module without a shell, and its lower part is fixedly installed in the tank or pool of the membrane filter through the skirt seat and the lower orifice plate, and the purified water is sucked out by the suction pump. The utility model saves many complex pipeline systems, the overall equipment occupies a small area, and has a simple structure. The equipment is equipped with an automatic backwashing device, an aeration device, and a cleaning device, so that the equipment not only has the performance of efficient processing, but also has Membrane automatic maintenance cleaning function. The system has stable filtration performance, low energy consumption per unit of water treatment, reduces unit water treatment costs, and improves the economical practicability of this technology in the water treatment industry. The utility model can be used in the fields of water purification, waste water treatment, seawater desalination, reverse osmosis pretreatment and the like.

Description

Integrated membrane filter and its filtration system

【Technical field】

The utility model belongs to the technical field of water purification and waste water treatment in the water treatment industry. In particular, it relates to an integrated membrane filter for water treatment and a filtering system thereof.

【Background technique】

With the rapid development of social economy, the problem of lack of global water resources has become increasingly prominent, and there is an urgent need for practical and effective water treatment new technologies and new equipment. The utility model integrated membrane filter is based on membrane separation technology and is used for New technology and new equipment for water purification and advanced wastewater treatment. This utility model technology has the characteristics of high pollutant removal efficiency and good effluent quality, and has a good development prospect.

The disadvantages of membrane bioreactors currently used for wastewater treatment are that the required membrane area is large, there are many connecting pipelines between the membranes, the floor area is large, and the management of the entire membrane module is inconvenient, and after a period of time after sewage treatment, the entire membrane The component equipment becomes heavy and difficult to clean, and its effluent indicators are difficult to meet the corresponding water quality standards for each effluent.

【Content of invention】

The purpose of the utility model is to solve the above-mentioned deficiencies in the prior art, and provide an integrated membrane filter and a filtration system composed of the integrated membrane filter.

The one-piece membrane filter can overcome the above-mentioned defects, so that it occupies less land, is small in size, has few pipelines, simple in structure, easy to clean, easy to replace and add, and has a long working life of the membrane components. Continuous or intermittent aeration, intermittent water discharge, and online automatic cleaning are used to reduce membrane pollution. The water discharge indicators are stable and qualified, the operation is stable, and the operating cost is reduced.

The integrated membrane filter provided by the utility model includes a tank body or a pond and a group of hollow fiber membrane modules, and the hollow fiber membrane module is fixedly installed in the tank body through the lower orifice plate installed at the bottom of the tank body or the pond and the skirt seat on it Or in the pool, the upper part of the tank or the pool is equipped with an upper orifice plate for strengthening and fixing the hollow fiber membrane module; the water inlet pipe and the air inlet pipe of the integrated membrane filter are introduced from the upper part of the tank or the pool, and the air intake pipe is introduced from the upper part The aeration pipe introduced to the bottom of the membrane module, the aeration pipe is divided into two branch pipes by a main pipe, leading to the bottom of the tank or pool of the membrane filter, and evenly distributed under the membrane module in a ring shape to aerate evenly; The water pipeline is arranged above the membrane module.

The hollow fiber membrane module is a columnar or curtain-type membrane module without a shell. The membrane used is an external pressure hollow fiber membrane; the membrane material is one of hydrophilic polyethersulfone (PES), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), or polyethylene (PE). It is preferred to use a special membrane material for membrane bioreactors that is hydrophilic and has a narrow membrane pore size distribution, and the pore size of the membrane is 0.01-0.45 microns.

The lower orifice plate is provided with fixing holes for fixing the membrane module, and diversion holes for fully aerating the membrane module, the fixing holes and the diversion holes are arranged alternately, and the diameter of the fixing holes is larger than the diameter of the diversion holes .

The utility model also provides a filtration system composed of the above-mentioned integrated membrane filter, that is, the water inlet pipe of the above-mentioned integrated membrane filter receives water through the water inlet valve and the pre-filter respectively; the air inlet pipe passes through the pneumatic valve Connect the blower; the production water pipeline is connected to the suction pump for production water through the production water valve, and then sent to the production water tank through the pipeline.

A backwash circuit composed of a backwash water pump and a backwash pipeline valve is installed between the product water pipeline before the water production valve and the product water tank.

Advantage and positive effect of the utility model:

The membrane filter is integrated, the hollow fiber membrane is installed in the membrane filter, and the pressure is driven by the suction pump, which saves many complicated piping systems, the overall equipment occupies a small area, the appearance is exquisite, and a large number of connecting pipes are saved. The equipment is equipped with automatic backwashing device, aeration device and cleaning device, so that the equipment not only has the performance of efficient treatment, but also has the function of automatic membrane maintenance and cleaning. The membrane module is made of hollow fiber membrane, the working life of the membrane module is long, and the membrane flux can be kept stable. The whole system of the utility model is also more convenient for the operation and management of the staff. Simple structure, easy to clean, replace and add. The utility model can be used in the fields of water purification, waste water treatment, seawater purification, reverse osmosis pretreatment and the like.

【Description of drawings】

Figure 1 is a schematic diagram of the overall structure of a filtration system composed of an integrated membrane filter,

Figure 2 is a front view of the integrated membrane filter,

Figure 3 is a top view of the integrated membrane filter,

Figure 4 is a sectional view of an integrated membrane filter,

Fig. 5 is a diagram of an orifice plate of an integrated membrane filter.

Among them, 1 hollow fiber membrane module, 2 skirt, 3 lower orifice plate, 4 middle orifice plate, 5 upper orifice plate, 6 inlet pipe, 7 water inlet pipe, 8 water production pipe, 9 suction pump, 10 blower, 11 backwash Water pump, 12 overflow holes, 13 instrument holes, 14, sewage outlet, 15 tank body (also can be pool), 16 water production tanks, 17 laminated filters.

【Detailed ways】

Embodiment 1 integrated membrane filter

As shown in Figures 2 to 5, this integrated membrane filter includes a tank body 15 (also can be a pond), a group of hollow fiber membrane modules 1 are installed through the lower orifice plate 3 at the bottom of the tank body 15 and the skirt seat on it 2. It is fixedly installed in the tank body 15, and the distance between the membrane modules is kept for easy disassembly and replacement. The upper and middle parts of the tank body are equipped with the upper orifice plate 5 and the middle orifice plate 4 for strengthening and fixing the hollow fiber membrane module; the water inlet pipe 7 and the air inlet pipe 6 are introduced from the upper part of the tank body, and the air inlet pipe is introduced from the upper part to the membrane module 1. The aeration pipe at the bottom. The aeration pipe is divided into two branch pipes by a main pipe, which lead to the bottom of the tank of the membrane filter, and are evenly distributed under the membrane module in a ring shape to aerate evenly. The aeration can be continuous or Do it intermittently. The amount of aeration is controlled at an air-to-water ratio of 0.5 to 10:1. The permeate pipeline 8 is arranged above the membrane module 1 .

The hollow fiber membrane module is a columnar or curtain-type membrane module without a shell. The membrane used is an external pressure hollow fiber membrane; the membrane material is one of hydrophilic polyethersulfone (PES), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), or polyethylene (PE). It is preferred to use a special membrane material for membrane bioreactors that is hydrophilic and has a narrow membrane pore size distribution, and the pore size of the membrane is 0.01-0.45 microns.

As shown in Figure 5, the lower orifice plate is provided with fixing holes for fixing the membrane module 1 and diversion holes for fully aerating the membrane module. The pore size, and the fixed holes and diversion holes are arranged alternately, so that the membrane module can be fully aerated.

The middle orifice plate and the upper orifice plate strengthen the fixation of the membrane module to prevent the upper part of the membrane module from being unstable and floating, and the unstable deformation between the pipelines leads to the problem of pipeline leakage.

Example 2 Filtration system composed of integrated membrane filter

As shown in Figure 1, the utility model simultaneously provides a kind of filter system that is made of above-mentioned integrated membrane filter, namely, the water inlet pipe 7 of above-mentioned integrated membrane filter respectively passes water inlet valve DF1 and pre-filter ( The laminated filter 17) receives incoming water; the air inlet pipe 6 is connected to the blower 10 through the pneumatic valve QF1;

A backwash circuit composed of a backwash water pump 11 and a backwash pipeline valve is installed between the water product pipeline 8 before the water production valve and the water production tank 16 .

The working process of the present utility model is:

(1) Preparations before operation of the membrane filter: pour water into the integrated membrane filter until it overflows, then turn on the blower, and the membrane filter will blow air evenly, and the blowing volume is about 0.2-1m ³ /h for each membrane module That's it. After blowing for 10 minutes, stop water intake and blowing, drain the water in the membrane filter, and then rinse the membrane filter with water again, and rinse it clean.

(2) Filtration operation: After the stand-alone debugging of the integrated membrane filter related equipment, instruments, etc., the membrane filter is fed with water again and the blast is turned on to start normal filtration (water production). During the water production process of the membrane filter, pay attention to the related Equipment and instruments are operating normally. The specific operation is: first open the water production valve DF2, set the production water flow rate to 1/3 of the rated value, and then turn on the suction pump, while the automatic water inlet valve DF1, the pneumatic valve QFI, and the blower remain open. When starting up and running, confirm that the water production manual adjustment valve V2 is in the state of 1/3 of the rated water production flow rate. After the production water gradually stabilizes, the pressure of the regulating system will rise slowly until the required design water production volume is reached. Pay attention to observe whether the relevant equipment and instruments are normal.

(3) Backwashing operation: The backwashing process is divided into two groups, and the backwashing pump uses the produced water to backwash the membrane module equipment. Turn off the suction pump and production water valve DF2 in sequence, then open the automatic backwash valve DF3 and the backwash manual control valve V3, and confirm that the backwash manual control valve V3 is in the state of 1/3 of the backwash flow rate, and the backwash gradually After stabilization, slowly adjust the backwash manual control valve V3, so that the backwash pressure gradually rises to about 0.1MPa, and the water flux during the backwash process is 2-3 times the normal water production.

The integrated membrane filter and filtration system provided by the utility model overcomes the problems of the prior art such as large occupied area, difficult cleaning, membrane flux attenuation, etc., and has the characteristics of small occupied area, continuous aeration, and intermittent water discharge. The filtration system uses online cleaning to reduce membrane pollution, maintain stable membrane flux, reduce water treatment costs, and save energy.

Claims (8)

1. An integrated membrane filter, including a tank body or a pool, and a group of hollow fiber membrane modules, characterized in that the above-mentioned group of hollow fiber membrane modules is installed through the lower orifice plate and the upper hole plate installed at the bottom of the tank body or pool. The skirt seat is fixedly installed in the tank body or pool, and the upper part of the tank body or pool is equipped with an upper orifice plate for strengthening and fixing the hollow fiber membrane module; The upper part is introduced, the air inlet pipe is introduced from the upper part to the aeration pipe at the bottom of the membrane module for uniform aeration, and the water production pipeline is arranged above the membrane module. 2. The integrated membrane filter according to claim 1, characterized in that the hollow fiber membrane module is a columnar or curtain-type membrane module without a shell. 3. The integrated membrane filter according to claim 1 or 2, characterized in that the membrane used in the hollow fiber membrane module is an external pressure hollow fiber membrane; the membrane material is hydrophilic polyethersulfone, polyvinylidene fluoride, One of polyvinyl chloride or polyethylene. 4. The integrated membrane filter according to claim 3, characterized in that the membrane material used in the hollow fiber membrane module is a special membrane material for membrane bioreactors that is hydrophilic and has a narrow membrane pore size distribution, and the pore size of the membrane is 0.01-0.45 Micron. 5. The integrated membrane filter according to claim 1 or 2, characterized in that the lower orifice plate is provided with a fixing hole for fixing the membrane module, and a guide for fully aerating the membrane module holes, the fixing holes and the diversion holes are arranged alternately, and the diameter of the fixing holes is larger than the diameter of the diversion holes. 6. The one-piece membrane filter according to claim 1 or 2, characterized in that the aeration pipe is divided into two branch pipes by a main pipe, leading to the bottom of the tank or pool of the membrane filter, and evenly distributed in a ring shape below the membrane module. 7. A filter system made of the integrated membrane filter according to claim 1, characterized in that the water inlet pipe of the above-mentioned integrated membrane filter receives water through the water inlet valve and the pre-filter respectively; The pneumatic valve is connected to the blower; the water production pipeline is connected to the suction pump for water production through the water production valve, and then sent to the production water tank through the pipeline. 8. The filtration system composed of an integrated membrane filter according to claim 7, characterized in that a backwash pump and a backwash pipeline valve are installed between the water production pipeline before the water production valve and between the water production tank. Flush circuit.

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