CN102060353B - A water treatment device that can quickly clean the filter membrane - Google Patents

Abstract

The present invention discloses a water treatment device capable of quickly cleaning filter membranes, wherein a water production pipe is axially arranged inside a horizontally extending shell, at least one filter unit is sleeved on the water production pipe, the filter unit has a plurality of filter membrane bags arranged at equal intervals perpendicular to the water production pipe, and a spray unit is extended on the inner circumference of the shell, a water spray pipe of the spray unit just corresponds to the filter membrane bag of the filter unit, when an air pump is started, high-pressure air is injected into the shell through the aeration port of the spray pipe to quickly impact and clean the surface of the filter membrane bag. The present invention has the effects of good filter membrane cleaning effect, fast cleaning efficiency and low power loss.

Description

A water treatment device that can quickly clean the filter membrane

technical field

The invention relates to a sewage treatment device, in particular to a water treatment device capable of prolonging the operating life cycle and capable of quickly cleaning the filter membrane.

Background technique

The technology of using membranes to separate solids and liquids is a well-known technique. However, the membrane tubes are prone to fouling and clogging, which has always troubled users. Therefore, how to reduce the clogging of membrane pores and increase the periodicity of use , has always been the focus of the relevant industry to break through and solve.

Chinese Patent No. ZL 200510072852.2 Invention Patent discloses a technology that uses high-pressure water column to push the vane to scrape off the sludge or rubber feather accumulated on the surface of the filter membrane, which is mainly inside a sealed container The shaft is provided with a production pipe, and the outer peripheral surface of the water production pipe is provided with a water filter unit in a watertight manner. The water filter unit is enclosed and arranged in a sealed container, which is mainly composed of a plurality of filter membranes and rotating plates alternately stacked. , each rotating plate has a movable rotating vane to contact the surface of the filter membrane. In addition, four water spray pipes are installed around the water filter unit inside the sealed container. There is a slit in the longitudinal direction of the pipe body, which is just opposite to the rotation direction of the vane blade. When the water flow enters the water spray pipe, the water flow can spray out the high-pressure water column to the rotating plate through the slit. , and drive the vane of the rotating plate to rotate, the rotating vane can contact the surface of the filter membrane and scrape off its impurities, thereby achieving the purpose of improving the cleaning effect on the filter membrane.

Although the impeller can be rotated by the impact of the sprayed water column from the water spray pipe, it actually still has the following problems:

1. In the state of high water pressure, the water column sprayed by the water spray pipe will not be able to effectively drive the rotation of the vane, so before the spray cleaning operation, the sewage in the sealed container must be completely drained, but so Firstly, since the filter membrane is usually made of soft water-dialyzable material, once the sewage is completely discharged from the container, the membrane surface on the outer edge of the filter membrane will lose its hydraulic buoyancy and become drooping. The upper surface of the membrane cannot be in contact with the vanes, so that the scraping effect of the rotating plate is greatly reduced.

2. The central part of the filter membrane will also be blocked by the rotating plate, so it cannot be cleaned effectively. Once a large amount of suspended particles and impurities are accumulated, a scaled and solidified filter cake layer will be formed on the surface of the filter membrane, causing the filter membrane to be removed and cleaned. troubled.

3. The water spray pipe needs to discharge the sewage from the container first, which is quite time-consuming, and the water column of the water spray pipe also consumes a large amount of clean water, which is not economical for cleaning.

Contents of the invention

The purpose of the present invention is to provide a water treatment device that can quickly clean the filter membrane, so as to solve the problems of poor filter cleaning effect, slow cleaning rate and high power loss in the prior art.

In order to achieve the above object, the solution of the present invention is:

A water treatment device capable of quickly cleaning the filter membrane, comprising a shell, a water production pipe, at least one filter unit and a spray washing unit, wherein:

The casing has a tubular casing extending along a horizontal axis and defining a filter chamber, and a water inlet hole, a drain hole and an air inlet communicated with the filter chamber;

The water production pipe is coaxially installed in the casing with the horizontal axis, has a pipe wall surrounding the axis and defining a water outlet hole, and a plurality of holes penetrating inward from an outer peripheral surface of the pipe wall through the water outlet hole. perforation;

The filter unit is detachably stacked on the outer peripheral surface of the water production pipe. The filter unit has a plurality of disc-shaped filter membrane bags, a filter membrane bag located in the center of the aforementioned filter membrane bag and just connected with the water production pipe through a hole. a central hole, and a plurality of water deflectors in groups of two to engage adjacent filter membrane bags; and

The spray cleaning unit has an air supply pump connected to the air inlet, an air injection pipe extending from the air inlet into the housing and attached to the inner wall of the shell, and a plurality of air injection pipes from the air inlet. The inner wall of the trachea faces the aeration port opened outwards, and makes the aeration port just correspond to the filter membrane bag of the filter unit.

Further, the housing also has an exhaust port.

Further, the casing includes a tube shell with open ends, a first shell cover tightly connected to one end of the tube shell, and a second shell cover tightly connected to the other end of the tube shell.

Further, the water production pipe is passed through and pivotally connected to both ends of the casing, and is driven by a power unit to pivot around the horizontal axis.

Further, the water treatment device also includes a plurality of guide plates, which are sheathed on the outer peripheral surface of the water production pipe and pressed against both ends of the filter unit. The guide plates respectively have a plurality of self- A supporting portion radially outwardly protrudes from the outer peripheral surface, and the aforementioned supporting portion just abuts against the inner peripheral surface of the casing.

Further, the water production pipe includes a first pipe section, a second pipe section and a socket connected between the first and second pipe sections.

Further, the filter membrane bags of the filter unit are arranged vertically to the axial direction of the water production pipe.

After adopting the above-mentioned structure, the housing and the filter unit of the present invention adopt a horizontal arrangement structure, so that the filter membrane bag can be kept in a vertical state, and the high-pressure gas injected from the outside can directly spray and disturb the filter membrane bag, In order to achieve the effect of quickly cleaning the membrane surface, and because the present invention does not have a rotating disc, the entire filter membrane bag can be completely sprayed off, reducing the fouling in the center of the membrane surface, and replacing the original spraying water column with high-pressure gas, Therefore, the loss of water source and power is quite small, which is not only economical but also environmentally friendly.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the first embodiment of the water treatment device that can quickly clean the filter membrane of the present invention;

Fig. 2 is a partially exploded perspective view of the first embodiment, illustrating the composition and structural relationship of each element of the filter unit;

Fig. 3 is a combined sectional view of the first embodiment, which shows the state in which the filter unit and the spray unit are assembled in the housing;

Fig. 4 is the assembled sectional view of this first embodiment, and it shows the state of the internal structure cut along the I-I section among Fig. 3;

Fig. 5 is the perspective view of the appearance of the jet pipe of the first embodiment;

Fig. 6 is a combined cross-sectional view of the second embodiment of the present invention, illustrating that a water production pipe is pivotally installed in the casing to be rotatable;

Fig. 7 is a reference diagram of the use state of the second embodiment, illustrating the spraying situation when the air injection pipe and the water production pipe inside the housing are in simultaneous operation;

Fig. 8 is a combined cross-sectional view of the third embodiment of the present invention, illustrating that the housing is an open structure without end caps.

In the picture:

Shell 10 Filter chamber 11

Shell 12 First shell cover 13

Second shell cover 14 Water inlet hole 15

Air inlet 16 Drain hole 17

Exhaust port 18 Product water pipe 20

Outlet hole 21 Pipe wall 22

Perimeter 221 Perforation 23

The first pipe section 24 The second pipe section 25

Socket piece 26 Waterproof ring 261

Filter unit 30 Filter membrane bag 31

Central hole 32 Drain plate 33

Pressure plate 34 guide plate 40

Socket part 41 outer peripheral surface 42

Support part 43 Accommodating slot 44

Spray unit 50 Air supply pump 51

Jet pipe 52 Aeration port 53

Water production pipe 60 Deceleration motor 70

Housing 80 Production water pipe 90

Detailed ways

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

Referring to Fig. 1 and Fig. 3, the first embodiment of a water treatment device that can quickly clean the filter membrane according to the present invention includes a housing 10, a water production pipe 20, at least one filter unit 30, and a plurality of guide plates 40 and a spray washing unit 50.

The casing 10 has a casing 12 extending along a horizontal axis X and defining a filter chamber 11, a first casing cover 13 and a second casing cover 14 respectively assembled at both ends of the casing 12, A water inlet 15 and an air inlet 16 corresponding to the first shell cover 13 and communicating with the filter chamber 11, a drain hole 17 and an exhaust port corresponding to the second shell cover 14 and communicating with the filter chamber 11 18, the air inlet 16 can lead to the air supply pump 51 of the spray cleaning unit 50, so as to pump high-pressure gas into the filter chamber 11 (details will be described below).

The water production pipe 20 is coaxially installed in the casing 10 with the horizontal axis X, has a pipe wall 22 surrounding the axis and can define a water outlet hole 21, and a plurality of pipe walls 22 from the pipe wall 22. An outer peripheral surface 221 of an outer peripheral surface 221 penetrates inwardly through the perforation 23 of the water outlet hole 21. In this embodiment, the water production pipe 20 includes a first pipe section 24, a second pipe section 25 coaxial with the first pipe section 24, and a The socket piece 26 connected between the first and second pipe sections 24 and 25 is hollow and has open ends. The inner wall of the socket piece 26 is embedded with a waterproof ring 261 .

Referring to Fig. 1 to Fig. 3, there are two filter units 30 in this embodiment, and they are respectively detachably stacked on the outer peripheral surface of the first pipe section 24 and the second pipe section 25 of the water production pipe 20, each filter unit 30 has a plurality of disc-shaped filter membrane bags 31, a central hole 32 that is located in the center of the filter membrane bag 31 and just communicates with the perforations 23, and a plurality of filter membrane bags that are adjacent to each other in groups of two. In addition, the filter membrane bags 31 of the aforementioned filtration unit 30 are arranged horizontally perpendicular to the axial direction of the water production pipe 20, and are respectively pressed on the first pipe section 24 and The two pressure plates 34 on the end of the second pipe section 25 are positioned to obtain positioning, and the detailed structure and function of the aforementioned filter membrane bag 31 and water guide plate 33 are the same as those in the Chinese invention patent No. ZL200510132492.0 under the name of the inventor of this case. And because the filter membrane bag 31 and the water guide plate 33 are not the key points of the present invention, so no more details are given here.

The above-mentioned guide discs 40 are set in groups of two and two respectively on the ends of the first pipe section 24 and the second pipe section 25 of the water production pipe 20, and each guide disc 40 has a center along the axis. The insertion part 41 protruding outward, and a plurality of supporting parts 43 protruding radially outward from an outer peripheral surface 42, and a concave accommodating groove 44 is formed between adjacent supporting parts 43. In this embodiment, the insertion part 41 is just enough for the sleeve 26 to be inserted therein, so that the first pipe section 24 and the second pipe section 25 of the water production pipe 20 are connected as one, while the aforementioned support part 43 can The interference is on the inner peripheral surface of the casing 10 to keep the two sets of filter units 30 coaxial in the casing 10 and to facilitate the assembly and alignment of the two sets of filter units 30 .

The spray cleaning unit 50, referring to Fig. 3 and Fig. 5, has an air supply pump 51 connected to the air inlet 16, an air supply pump 51 extending from the air inlet 16 into the casing 10 and attached to the shell The jet pipe 52 on the inner peripheral surface of 12 and a plurality of aeration ports 53 opened radially outward from the jet pipe 52, and make the aforementioned aeration port 53 just correspond to the filter membrane bag 31 of the aforementioned filter unit 30, and The diameter of the jet pipe 52 is smaller than the width of the accommodating groove 44 of the guide disc 40 , so that the filter unit 30 covered with the guide disc 40 can be pushed into the filter chamber 11 .

When in use, referring to Fig. 3 and Fig. 4, the operator can first drive the clean water from the outside to the water production pipe 20 to perform a backwash procedure (at this time, the water inlet is closed), when a large amount of water is full The entire filter membrane bag 31, under the pumping of water pressure, can make the whole filter membrane bag 31 bulge, and then reversely push the impurities blocked in the membrane holes, and then, the valve of the drain hole 17 is opened to filter A small amount of backwash water (about 5-10%) in the chamber 11 is discharged out of the filter chamber 11 through the outlet 17, and at the same time, the originally bulging filter membrane bag 31 will gradually shrink inward due to the decrease in water pressure in the filter chamber 11 Get back to the original state, make each filter membrane bag 31 still keep an appropriate distance, then close the drainage hole 17, then start the air supply pump 51, at this moment the high-pressure air is just blown through the aeration port 53 of the jet pipe 52 into the filter chamber 11 to impact and clean the surface of the filter membrane bag 31, and when the high-pressure air hits the filter membrane bag 31 of the filter unit 30, it will be shunted and blocked by the membrane surface, and when it hits the shell 10 surrounding walls of the body and the reverse impulse flow, so, under the high-speed repeated oscillation, a large number of fine disturbing bubbles will emerge in the filter chamber 11, reducing the impurity and sludge in the sewage accumulating in the pores of the filter membrane bag 31 Probability, after running for a predetermined time, stop the air supply pump 51, then open the drain hole 17, and discharge all the backwash water in the filter chamber 11 out of the housing 10, so that the cleaning backwash can be quickly completed Washing job.

As shown in Figure 6 again, it is the second embodiment of the present invention. In this embodiment, the water production pipe 60 is arranged to pass through the center of the housing 10, and one end of the water production pipe 30 is connected with a transmission element (such as a chain) Connect a reduction motor 70, and the support parts of the guide discs 40 are set so as not to contact the jet tube 52, so as to prevent the two from interfering. In this way, under the drive of the reduction motor 70, the water production tube can Rotation is generated to synchronously drive the filter membrane bag to rotate, as shown in Figure 7, and at the same time cooperate with the air supply pump 50 to exert the disturbance bubbles in the filter chamber 11, so that the entire filter unit 30 can be completely affected by the gas at 360 degrees The quick cleaning advantage of the present invention can be further brought into play by spraying and flushing.

It is worth mentioning that the above-mentioned second embodiment can also be used in MBR (Membrane Bio-Reactor, thin film bioreactor), to prevent the biofilm from accumulating too thick and blocking, and can adjust the ratio of aerobic zone to anaerobic zone , to change the concentration polarization phenomenon in sewage.

As shown in Fig. 8, it is the third embodiment of the present invention. In this embodiment, both sides of the casing 80 are open, and the whole casing 10, the water production pipe 90 and the filter unit 30 are immersed in a sewage treatment In the tank (not shown), the water production pipe 90 draws the water in the casing 80 with negative pressure from the outside, and the same effect as the first embodiment can also be achieved by using the setting of the spray washing device 50 .

To sum up the above, the advantages that can be achieved by a water treatment device that can quickly clean the filter membrane involved in the present invention are summarized as follows:

1. Since the housing 10 and the filter unit 30 adopt a horizontal arrangement structure, and only a small amount of backwash water is discharged out of the housing 10, the filter membrane bag 31 can be kept in a vertical state, and the injected The high-pressure gas can directly impact and disturb the filter membrane bag 31, so that the membrane surface can be quickly cleaned, and the disturbed air bubbles in the water can also reduce the formation of filter cake on the membrane surface.

2. Since the whole device is not equipped with a rotating disc, when the filter unit 30 is backwashing, the high-pressure gas is not hindered by the rotating disc, so that the entire filter membrane bag 31 can be completely washed away by spraying, reducing the central knot on the membrane surface. dirt situation.

3. Moreover, when the filter unit 30 is backwashing, it is not necessary to completely remove the water in the filter chamber 11, but to use high-pressure gas to replace the original spraying water column, so the loss of water source and power is quite small, which is not only economical but also environmentally friendly.

But the above are only three embodiments of the present invention, and the scope of the present invention cannot be limited with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the description of the invention, All should still belong to the scope that the patent of the present invention covers.

Claims (6)

1. A water treatment device that can quickly clean the filter membrane, comprising a housing, a water production pipe, at least one filter unit and a spray washing unit, characterized in that: The casing has a tubular casing extending along a horizontal axis and defining a filter chamber, and a water inlet hole, a drain hole and an air inlet communicated with the filter chamber; The water production pipe is coaxially installed in the casing with the horizontal axis, has a pipe wall surrounding the axis and defining a water outlet hole, and a plurality of holes penetrating inward from an outer peripheral surface of the pipe wall through the water outlet hole. perforation; The filter unit is detachably stacked on the outer peripheral surface of the water production pipe. The filter unit has a plurality of disc-shaped filter membrane bags, a filter membrane bag located in the center of the aforementioned filter membrane bag and just connected with the water production pipe through a hole. a central hole, and a plurality of water guide plates that are arranged in groups of two to connect adjacent filter membrane bags to each other, and the filter membrane bags of the filter unit are arranged vertically to the axial direction of the water production pipe; and The spray cleaning unit has an air supply pump connected to the air inlet, an air injection pipe extending from the air inlet into the housing and attached to the inner wall of the shell, and a plurality of air injection pipes from the air inlet. The inner wall of the trachea faces the aeration port opened outwards, and makes the aeration port just correspond to the filter membrane bag of the filter unit. 2 . The water treatment device capable of quickly cleaning the filter membrane according to claim 1 , wherein the casing also has an air outlet. 3 . 3. A water treatment device that can quickly clean the filter membrane as claimed in claim 1, wherein the housing comprises a tube shell with open ends, a second tube tightly connected to one end of the tube shell A case cover and a second case cover tightly connected to the other end of the tube case. 4. A water treatment device that can quickly clean the filter membrane as claimed in claim 1, wherein the water production pipe is pivotally connected to both ends of the housing, and is driven by a power unit to go around This horizontal axis produces the pivot. 5. A water treatment device capable of quickly cleaning the filter membrane according to claim 1, characterized in that: the water treatment device also includes a plurality of guide plates, and the guide plates are sleeved on the outer periphery of the water production pipe surface, and clamped on both ends of the filter unit, the guide discs respectively have a plurality of supporting parts protruding radially outward from an outer peripheral surface, and the aforementioned supporting parts are just in contact with the inner peripheral surface of the housing superior. 6. A water treatment device that can quickly clean the filter membrane as claimed in claim 1, wherein the water production pipe includes a first pipe section, a second pipe section, and a joint between the first and second pipe sections of sockets.

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