CN102139186B - Ultrasonic cleaning device of membrane bioreactor - Google Patents

Abstract

The invention discloses an ultrasonic cleaning device of a membrane bioreactor, which comprises a membrane bioreactor, wherein the membrane bioreactor comprises a left tank wall and a right tank wall, a plurality of filter membrane pieces are sequentially arranged between the left tank wall and the right tank wall, a portal frame capable of moving forwards and backwards is arranged on the upper surfaces of the left tank wall and the right tank wall, a cross rod capable of moving upwards and downwards is arranged on the portal frame, an ultrasonic box body capable of moving leftwards and rightwards and playing a role of cleaning the filter membrane pieces is arranged on the cross rod, and vibrating plates are respectively arranged on the front side and the rear side of the ultrasonic box body. The invention has the characteristics of convenient use, low price, high efficiency, time saving and the like.

Description

Ultrasonic cleaning device for membrane bioreactor

【Technical field】

The invention is an online ultrasonic cleaning device, and more specifically relates to an online ultrasonic cleaning device applied to a membrane bioreactor.

【Background technique】

MBR is Membrane Bio-Reactor, also known as membrane bioreactor. It is a new type of sewage treatment technology that combines membrane separation unit and biological treatment unit. It is a sewage treatment device that can greatly improve the system's effluent water quality and volume load. Replacing the secondary settling tank with membrane modules maintains a high active sludge concentration in the bioreactor to reduce the land occupation of sewage treatment facilities and reduce the amount of sludge by maintaining low sludge load.

Compared with traditional biochemical water treatment technology, MBR has the following main features: high treatment efficiency and good effluent quality. The equipment is compact and occupies a small area; it is easy to realize automatic control and simple operation and management. Since the 1980s, more and more attention has been paid to this technology, and it has become one of the hot spots in the research of refractory organic sewage treatment.

At present, membrane bioreactors have been used in industrial and domestic sewage treatment industries, especially for the treatment of high-concentration refractory organic wastewater that is difficult to meet the standard with conventional biochemical treatment processes. Moreover, the system has the advantages of small footprint and no secondary settling tank for conventional biochemical treatment. It has developed extremely fast in recent years.

However, during the use of MBR membrane bioreactor components, because the system uses negative pressure to absorb water, the membrane tubes are easily blocked, resulting in a decrease in the effluent flow. In this regard, researchers at home and abroad have adopted a variety of cleaning methods to solve the problem of membrane tube blockage. The application of ultrasonic cleaning technology in the MBR system is also one of the very effective ways to solve the membrane tube blockage.

However, at present, there are ultrasonic membrane tube cleaning systems that have been adopted or applied for patent protection at home and abroad, although this can effectively solve the problem of MBR membrane tube blockage. But they are all used in fixed ultrasonic cleaning tank mode. That is to say, the ultrasonic cleaning system is fixed in a special cleaning tank outside the MBR system, and the membrane components to be cleaned are removed from the system, and then placed in the special cleaning tank for cleaning, and the membrane components are installed back after the cleaning is completed. In the MBR system, the ultrasonic vibration components are fixed in this traditional cleaning system.

For the large-scale MBR system, the cleaning quantity of the membrane components is very large, and the manpower consumption is very large in the process of disassembling and assembling the membrane components frequently, and the membrane components are easily damaged during the operation process, which is difficult for the current ultrasonic cleaning technology. One of the key issues in the application of MBR large systems.

【Content of invention】

The object of the present invention is to overcome the deficiencies in the prior art and provide an ultrasonic cleaning device that is easy to use, low in price, high in efficiency and time-saving.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The ultrasonic cleaning device for a membrane bioreactor is characterized in that it includes a membrane bioreactor tank, the membrane bioreactor tank includes a left tank wall and a right tank wall, and a plurality of filters are sequentially arranged between the left tank wall and the right tank wall Membrane, on the upper surface of the left pool wall and the right pool wall, a gantry frame that can move forward and backward is provided, a cross bar that can move up and down is provided on the gantry frame, and a horizontal bar that can move left and right is provided on the cross bar. The moving ultrasonic box, which plays the role of cleaning the filter membrane, is provided with vibrating plates on the front and rear sides of the ultrasonic box.

The ultrasonic cleaning device of the membrane bioreactor as described above is characterized in that a first driver is provided at the lower part of the left arm of the gantry to drive the gantry to move forward and backward; The gantry moves the second driver up and down; the third driver for driving the ultrasonic box to move left and right is arranged on the cross bar.

The ultrasonic cleaning device for a membrane bioreactor as described above is characterized in that the ultrasonic box includes a sealed box, and a piezoelectric ceramic ultrasonic vibration head is arranged in the sealed box.

The ultrasonic cleaning device for a membrane bioreactor as described above is characterized in that there are multiple ultrasonic boxes.

The ultrasonic cleaning device for a membrane bioreactor as described above is characterized in that there are two ultrasonic boxes.

The ultrasonic cleaning device for a membrane bioreactor as described above is characterized in that the material of the sealed box is stainless steel or titanium.

The ultrasonic cleaning device for a membrane bioreactor as described above is characterized in that a membrane system cleaning tank is provided in the membrane bioreactor tank.

The ultrasonic cleaning device for the membrane bioreactor as described above is characterized in that a stroke controller for controlling the actions of the first driver, the second driver and the third driver is provided on the membrane bioreactor tank.

The ultrasonic cleaning device for membrane bioreactor as described above is characterized in that guide rails are provided on the left and right pool walls.

Compared with the prior art, the present invention has the following advantages:

The present invention uses the gantry-type mobile ultrasonic online cleaning technology in a large-scale MBR water treatment system, which can not only effectively solve the blockage problem in the use of ordinary MBR membrane tubes, but also greatly reduce engineering investment.

Moreover, this online ultrasonic cleaning technology is easily combined with ordinary backwashing technology, which greatly improves the effective working time and efficiency of the MBR membrane system. Because ultrasonic cleaning does not damage the MBR membrane tube, it can effectively prolong the service life of the membrane tube, thereby reducing the operating cost of the entire MBR system.

【Description of drawings】

Figure 1 is a schematic diagram of the present invention.

【Detailed ways】

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in the figure, the ultrasonic cleaning device for a membrane bioreactor includes a membrane bioreactor tank 1, and a membrane system cleaning tank 12 is arranged in the membrane bioreactor tank 1. The membrane bioreactor tank 1 includes a left tank wall 2 and a right tank wall 3 . Between the left pool wall 2 and the right pool wall 3, a plurality of filter membrane pieces 4 are sequentially arranged, and each filter membrane piece 4 is arranged in parallel.

On the upper surface of the left pool wall 2 and the right pool wall 3, a gantry 5 that can move forward and backward is provided, and a first driver 8 that drives the gantry 5 to move forward and backward is provided at the lower part of the left arm of the gantry 5 , that is, the first driver 8 drives the gantry 5 to move forward and backward, so that the gantry 5 comes to the correct position, and the first driver 8 can be driven by a motor or driven by other methods.

A horizontal bar 6 that can move up and down is arranged on the gantry frame 5 . An ultrasonic box body 7 which can move left and right to clean the filter membrane element 4 is arranged on the cross bar 6 , and vibrating plates 8 are respectively arranged on the front and rear sides of the ultrasonic box body 7 . The membrane filter 4 to be cleaned is placed between the vibrating plates 8 on both sides, and the ultrasonic box 7 starts to work to clean the membrane filter 4 . The upper right side arm of described gantry 5 is provided with driving gantry 5 to move up and down the second driver 9, that is, the second driver 9 drives cross bar 6 to move up and down, so that cross bar 6 comes to the correct position. The second driver 9 can be driven by a motor or by other means.

The third driver 10 that drives the ultrasonic box body 7 to move left and right is provided on the cross bar 6, that is, the third driver 10 drives the ultrasonic box body 7 to move left and right, so that the ultrasonic box body 7 comes to the correct position.

The ultrasonic box 7 includes a sealed box 11 , and a piezoelectric ceramic ultrasonic vibration head is arranged in the sealed box 11 . The length, width, and thickness of the sealed box body 11 can be set according to the actual size of the MBR pool body, and the ultrasonic frequency, number and power of the piezoelectric ceramic ultrasonic vibrating heads can be set according to the ultrasonic cleaning intensity, and then use corresponding welding Process welded sealed box body.

As a preferred mode of this embodiment, there are multiple ultrasonic cassettes 7 .

As a preferred mode of this embodiment, there are two ultrasonic cassettes 7 .

As a preferred mode of this embodiment, the material of the sealed box body 11 is stainless steel or titanium.

As a preferred mode of this embodiment, a guide rail 14 is provided on the left pool wall 2 , and the gantry 5 can move along the guide rail 14 .

As a preferred mode of this embodiment, a stroke controller 13 for controlling the actions of the first driver 8 , the second driver 9 and the third driver 10 is provided on the membrane bioreactor 1 .

Working process of the present invention is:

The ultrasonic boxes 7 (one pair or several pairs) are arranged on the cross bars 6 on the gantry 5, and the second driver 9 can act to lift the ultrasonic boxes 7. After the ultrasonic box body 7 is lifted, the accompanying vehicle moves along the front and rear directions of the membrane bioreaction tank 1 . At the position of the membrane filter 4 that needs to be cleaned, the gantry stops and is fixed under the control of the first driver 8 . Then the second driver 9 controls the ultrasonic box 7 to slowly descend to between the membrane filter elements 4 in the membrane bioreactor 1 . At this time, the ultrasonic drive power supply starts to work, and the ultrasonic box body 7 sends out the ultrasonic waves with a set frequency and intensity to clean the dirt on the surface of the membrane tube (the membrane tube can still be in working condition at this moment).

At the same time, when the gantry suspension drive system is working, the ultrasonic box body 7 moves left and right under the action of the third driver 10 to clean the membrane filter 4 . Simultaneously, stroke controller 13 is arranged at portal frame 4 running beginning and end. When the ultrasonic box body 7 reaches the stroke end, the first driver 8 and the vibration system of the ultrasonic component stop working.

At this time, the program control system controls the action of the second driver 9 to lift the cross bar 6 and lift the vibrating plate 8 on the ultrasonic box body 7 out of the water surface (to be higher than the position of the membrane filter). Then drive the gantry 4 to run for a short distance according to the set program (moving to another column of adjacent filter membrane parts), and then lower the ultrasonic box body 7 suspended to the position of the filter membrane parts to be cleaned, thus starting An online cleaning process for another series of filter membrane components. After all the filter membrane parts in the whole pool are cleaned once, the second cleaning process is carried out from the beginning.

If the volume of the MBR tank body, that is, the membrane bioreaction tank 1, is large and there are too many filter membranes, it can be considered to use two or more gantry operations with ultrasonic cleaning systems at the same time, so as to ensure the cleaning effect and sufficient online Cleaning time.

At the same time, the three-dimensional mobile gantry crane can also be used as a working platform for the daily inspection and maintenance of the filter membrane and a lifting and transportation device for the replacement of the filter membrane, which can greatly reduce the labor intensity of the staff and improve work efficiency.

The significance of the present invention is to use the ultrasonic membrane tube cleaning system with the least settings to achieve the maximum effect of cleaning the filter membrane, thereby saving engineering cost, improving the operating efficiency of the filter membrane, prolonging the service life of the filter membrane, and reducing operating costs. Through this fully automatic online cleaning system, the efficient operation of the MBR system can be guaranteed, and the effective and non-damaging cleaning of the filter membrane can increase the water output of the system and maximize the service life of the filter membrane.

The gantry can use PLC programmable controller as the central control system, and Hall switch or photoelectric switch as stroke control and limit, so the system reliability is very high. Moreover, the cleaning speed and intensity can be adjusted at any time according to the actual situation of the fouling and clogging of the filter membrane.

Claims (8)

1. the ultrasonic cleaning equipment of membrane bioreactor, it is characterized in that including membrane biological reaction pond (1), this membrane biological reaction pond (1) includes left pool wall (2) and right pool wall (3), between left pool wall (2) and right pool wall (3), be disposed with a plurality of filter membrane spares (4), the upper surface of left pool wall (2) and right pool wall (3) be provided with can before, the portal frame (5) that move the back, on portal frame (5), be provided with and go up, mobile down cross bar (6), being provided with on cross bar (6) can be left, the ultrasonic wave box body (7) that plays cleaning filter membranes spare (4) effect that moves right, preceding at ultrasonic wave box body (7), back both sides are respectively arranged with oscillating plate; Be provided with forward and backward first driver (8) that moves of driving portal frame (5) in the arm bottom, left side of described portal frame (5); Be provided with upper and lower second driver (9) that moves of driving portal frame (5) on the right arm top of portal frame (5); On cross bar (6), be provided with and drive left and right mobile the 3rd driver (10) of ultrasonic wave box body (7).

2. the ultrasonic cleaning equipment of membrane bioreactor according to claim 1 is characterized in that described ultrasonic wave box body (7) comprises sealing box body (11), is provided with the piezoelectric ceramic ultrasound head that shakes in sealing box body (11).

3. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2 is characterized in that described ultrasonic wave box body (7) has a plurality of.

4. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2 is characterized in that described ultrasonic wave box body (7) has two.

5. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2, the material that it is characterized in that described sealing box body (11) is stainless steel or titanium.

6. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2 is characterized in that being provided with film system service sink (12) in described membrane biological reaction pond (1).

7. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2 is characterized in that being provided with the journey controller (13) of controlling first driver (8), second driver (9), the 3rd driver (10) action on membrane biological reaction pond (1).

8. the ultrasonic cleaning equipment of membrane bioreactor according to claim 2 is characterized in that being provided with guide rail (14) on described left pool wall (2).

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