CN2710734Y - Trailed type filtering system contg. doughnut and porous membrane bundle - Google Patents

Abstract

The utility model relates to a filter system of a suspended hollow fiber porous membrane bundle arranged in a sewage treatment pool. It includes a large-scale sewage treatment tank, a hollow fiber porous membrane module arranged therebetween and an aeration pipe connected with an output pump. The hollow fiber porous membrane module uses several hollow fiber membrane bundles immersed in the sewage treatment tank. It is characterized in that: one end of the hollow fiber membrane bundle is fixed on the connecting body, and is connected with the water collection pipe arranged near the bottom of the reaction pool through the connecting body, while the other end of the hollow fiber membrane bundle is immersed in the water pool, A floating body is fixedly arranged at the end. Therefore, the device is compact, the force of the membrane filament is uniform, it is not easy to break, the independence of each module bundle is good, and it can be replaced in time when a failure occurs without affecting the work of the rest; and the membrane filament is smooth and not easy to tangle. Large water flux, long service life and other characteristics, can be used alone or in series for high turbidity water treatment occasions.

Description

Filtration System of Hanging Hollow Fiber Porous Membrane Bundle

technical field

The utility model relates to a sewage treatment device, in particular to a filter system of a suspended hollow fiber porous membrane bundle arranged in a large sewage treatment pool.

Background technique

The traditional domestic and industrial wastewater reuse treatment process is relatively complicated, and the operation and management are also very troublesome, and the quality of the treated water is not very stable. The membrane treatment technology developed in recent years overcomes the shortcomings and deficiencies of the traditional process, and improves the physical and chemical indicators of the treated water. In the traditional membrane module design, hollow fiber membranes are packed in a cylindrical shell to form a membrane module, and the membrane area per unit volume of the module is often increased by increasing the packing density of the membrane filaments, but this will affect the water flow in the module The uniform distribution will cause a large head loss. In the case where the volume is not the main consideration, the permeation effect of the module with large volume and small filling density of membrane filaments will be better. At the same time, the smaller the density of membrane filaments in the module, the smaller the head loss of the module. The inner water flow is uniform, and the membrane area is fully utilized. However, reducing the density of membrane filaments in traditional modules not only does not improve the uniformity of water flow as expected, but the membrane filaments are easy to break and cause short circuit of water flow. In this way, the uniformity of water flow and the efficiency of gas-liquid transfer will be reduced, which will easily cause membrane fouling.

In order to improve the uniformity of water flow, increase the permeation efficiency, and solve the problem of fouling of the membrane used, various shellless membrane modules have emerged as the times require. For example, someone disclosed a high-turbidity water treatment device in the patent application number 01126449.7, which is characterized in that the two ends of the hydrophilic hollow fiber microporous membranes arranged in a screen shape are respectively connected to the water collection pipes, and the flocculation, air flotation Most of the impurities in the water are deposited or floated on the water surface, which reduces the burden on the membrane, and under the disturbance of the gas, the membrane is always in a shaking state, and the bubbles constantly scrub the membrane, which improves the maintenance of the membrane's water permeability. As another example, someone applied for a "immersion membrane element and module" (application number 00802893.1), which has microfiltration or ultrafiltration hollow fiber membranes, and the hollow fiber membranes are respectively fixed to a pair of horizontally opposite and vertically extending water collection pipes. In between, the entire membrane module is submerged in the water to be filtered, and an aerator is arranged under the membrane module to aerate one or more modules so as to scrub the membrane from time to time during the periodic stop of permeation. However, in the above-mentioned technologies, the two ends of the membrane filaments of the membrane module are mostly fixed to the two sets of water collection pipes. Although the membrane filaments can vibrate under the action of the aeration system, the degree of freedom is limited, and the pollution bonded to the surface of the membrane filaments cannot be removed well. thing. Moreover, there is a problem that the two ends of the membrane wire are fixed and easy to break, which affects the service life of the membrane module and causes the water quality of the produced water to be unstable.

Contents of the invention

The utility model mainly solves the problem that both ends of the membrane filaments in the prior art are fixed during the production process, and its degree of freedom is small, so it is difficult to effectively remove the pollutants bonded on the surface of the membrane filaments under a small air flow disturbance, and the water level It is not suitable to fluctuate greatly, and the membrane filament is easy to break, which will affect the technical problems such as the service life of the membrane module and the water quality of the produced water. Provides a simple structure, the hollow fiber porous membrane bundle has a large degree of freedom, and the pollutants bonded on the surface of the membrane filament can be effectively removed under a small air flow disturbance, and the water level of the large pool is suitable for relatively large fluctuations. The filament is not easy to break, the membrane module has a long service life and the water quality of the produced water is stable. The filtration system of the suspended hollow fiber porous membrane bundle.

At the same time, the utility model also solves the overall arrangement of membrane filaments in the prior art, which is not conducive to replacement and maintenance when local membrane filaments are broken. Once a local failure occurs, the entire line needs to stop working, and the membrane filaments are easy to be confused and entangled with each other, causing Water flux drops, technical issues that affect work efficiency, etc. Provides a kind of filter with sufficient independence of membrane filaments, local faults can be eliminated without affecting the operation of the equipment, and the membrane filaments are smooth, not easy to tangle, large water flux, and high working efficiency. system.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a filtration system of a suspended hollow fiber porous membrane bundle, including a large sewage treatment tank, a hollow fiber porous membrane module and an output pump The connected aeration pipes, the hollow fiber porous membrane module adopts several hollow fiber membrane bundles immersed in the sewage treatment tank, and it is characterized in that: one end of the hollow fiber membrane bundle is fixed on the connecting body, and passes through The connecting body is connected with the water collection pipe arranged near the bottom of the reaction tank, while the other end of the hollow fiber membrane bundle is submerged in the water tank, and a floating body is fixed at the end. One end of the membrane bundle is usually cast and collected by epoxy resin, connected to the water collection pipe, and communicated with it; the other end of the membrane bundle is fixed with a floating body, which floats in the upper part of the treatment pool, and floats and swings with the water flow . Only one end of the membrane bundle is fixed on the water collecting pipe, so that the other end has a greater degree of freedom, which is beneficial to the occasion where the water level fluctuates greatly.

Preferably, the floating body is arranged at the upper end of the hollow fiber membrane bundle, and a tie is arranged between it and the supporting rod. The hollow fiber membrane bundles are connected with the support rods through ties, and are constrained to swing in a certain area, so as to prevent the adjacent hollow fiber membrane bundles from being entangled with each other due to relatively large swings during operation.

Preferably, a detachable flange joint is provided between the connecting body and the water collecting pipe. In this way, even if a group of hollow fiber membrane bundles is damaged, only the group of hollow fiber membrane bundles needs to be replaced, and other components can still be used and operated, and maintenance and replacement become convenient and fast. In addition to the flange connection, the connection between the joint body and the water collection pipe can also be connected by clamps, thread unions and other connection methods.

Preferably, the flange joints are evenly distributed on the water collecting pipe, and one or more thread unions are arranged on the water collecting pipe connected with the output pump.

Preferably, an aeration pipe is arranged below or beside the water collecting pipe. After working for a period of time, dirt must accumulate on the surface of the hollow fiber membrane bundle, and the gas generated by the aeration tube makes the hollow fiber membrane bundle shake within a certain range with the air and water flow, shaking off the dirt attached to the membrane surface.

In addition, preferably, the hollow fiber membrane bundle is cylindrical, its height is lower than the water depth in the sewage treatment tank, and its diameter is 100mm-400mm.

Therefore, the utility model has the advantages of simple structure, reasonable layout, compact device, uniform force on the membrane wire, not easy to break, good independence of each group of mold bundles, and can be replaced in time without affecting the rest of the work when a failure occurs. ; and easy to operate, smooth membrane, not easy to tangle, large water flux, good water quality, low investment, high treatment efficiency, long service life of equipment, etc., can be used alone or in series for high turbidity water treatment occasions.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the utility model;

Accompanying drawing 2 is a kind of enlarged hollow fiber porous membrane bundle head structure schematic diagram of the utility model;

Accompanying drawing 3 is A-A sectional view of Fig. 2.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example:

Several hollow fiber porous membrane bundles 9 (as shown in Figure 1 ) completely submerged in the large-scale sewage treatment tank 6, one end of which is respectively cast and collected with epoxy resin, and the ends are opened and respectively connected to the water collection pipe 2 through the connecting body 1 It is connected with the suction pump 8, and on the water collecting pipe 2, the ends of two adjacent membrane bundles are distributed sequentially with a distance of 100mm. The connection body 1 is connected with the water collecting pipe 2 through a detachable flange joint 3 . The flange joints 3 are evenly distributed on the water collecting pipe 2, and one or more threaded joints 14 are arranged on the water collecting pipe 2 connected with the output pump. The other end of the membrane filaments is sealed and collected in the airtight floating body 12, with the help of the buoyancy of the floating body 12, one end of the membrane bundle is floated on the upper part of the treatment pool. A tether 13 made of flexible fiber bundles is tied on each buoyant body 12 , and the other end of the tether 13 is connected to the support rod 4 . It can not only keep the membrane bundles with sufficient freedom, but also play a restraining role to prevent the membrane bundles from being entangled with each other, and it is also easy to clean and maintain. The water to be purified passes through the pores on the hollow fiber porous membrane wall, enters the inner side of the hollow fiber porous membrane, flows into the water collection pipe 2, and is sucked out by the suction pump 8. The water collection pipe 2 is immersed in the lower part of the treatment pool, and the aeration pipe 5 is arranged about 200mm below the water collection pipe, and the membrane module is cleaned with air at regular intervals. In this way, the hollow fiber membrane bundles submerged in the sewage to be treated and arranged according to a certain density, under the disturbance of the gas-water mixture formed by the gas introduced by the aeration tube 5, can be within a certain range because the upper end is in a free state in the water. Shake with the air and water flow to shake off the dirt attached to the surface of the membrane. The aeration pipe 5 introduces air through a blower 10 and controls its operation through a valve 11 . Under the action of a large number of air bubbles, the dirt in the water is divided into two parts, wherein the dirt with a larger specific gravity is deposited on the bottom of the pool and can be discharged regularly; while the dirt with a lighter specific gravity floats on the water surface and is discharged through the overflow port 7.

The utility model is suitable for the purification treatment of high turbidity water such as surface water, ground water, municipal sewage and industrial waste water. It can also be applied to membrane bioreactors.

Claims (10)

1. filtration system of caring for formula doughnut porous membrane bundle, comprise large-scale treatment tank, the aeration tube of being located at doughnut perforated membrane assembly therebetween and joining with rear pump, described doughnut perforated membrane assembly is to adopt several hollow fiber membrane bundles that are dipped in the treatment tank, it is characterized in that: an end of described hollow fiber membrane bundle (9) is fixed on the junctor (1), and be connected with the collector pipe (2) that is arranged at the nearly bottom of reaction tank by junctor (1), and the other end of hollow fiber membrane bundle is immersed in the pond, and is fixed with buoyancy aid (12) at its place, end.

2. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 is characterized in that described buoyancy aid (12) is arranged at hollow fiber membrane bundle (9) upper end, and is provided with frenulum (13) between itself and described support bar (4).

3. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 and 2 is characterized in that being provided with dismountable bump joint (3) between described junctor (1) and the collector pipe (2).

4. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 and 2 is characterized in that being provided with screw thread loose joint or clip between described junctor (1) and the collector pipe (2).

5. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 and 2, it is characterized in that described bump joint (3) is distributed on the collector pipe (2), and the collector pipe that links to each other with rear pump (2) is provided with one or more screw thread loose joints (14).

6. the filtration system of caring for formula doughnut porous membrane bundle according to claim 3, it is characterized in that described bump joint (3) is distributed on the collector pipe (2), and the collector pipe that links to each other with rear pump (2) is provided with one or more screw thread loose joints (14).

7. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 and 2 is characterized in that below or its other aeration tube (5) that is provided with at described collector pipe (2).

8. the filtration system of caring for formula doughnut porous membrane bundle according to claim 6 is characterized in that below or its other aeration tube (5) that is provided with at described collector pipe (2).

9. the filtration system of caring for formula doughnut porous membrane bundle according to claim 1 and 2 is characterized in that being cylindric at described hollow fiber membrane bundle (9), and it highly is lower than the degree of depth of sewage disposal pool inner water, and its diameter is 100mm-400mm.

10. the filtration system of caring for formula doughnut porous membrane bundle according to claim 6 is characterized in that being cylindric at described hollow fiber membrane bundle (9), and it highly is lower than the degree of depth of sewage disposal pool inner water, and its diameter is 100mm-400mm.

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