TWI533918B - A water treatment device that can scrape off the membrane sludge - Google Patents

Description

Water treatment device capable of scraping off sludge on filter surface

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a water treatment apparatus, and more particularly to a water treatment apparatus for preventing the surface of a filter bag from being scratched and extending the surface of the filter bag to scrape the sludge on the surface of the filter.

In order to increase the effective interception area of the filter membrane group to increase the water production, the conventional spiral-clad filtration membrane group has been developed into a flat capsule filter membrane bag, which is mainly a plurality of strings. It is collected on a water pipe, and does not need to be covered by a hard shell on the outside, but only locked at both ends by a pressure plate, so the contact area of the sewage is quite high, and the filter unit behind the filter bag group is small, and What is important is that the sewage can diffuse and infiltrate the filter bag in a lateral flow sweeping manner. Therefore, the filter bag not only has a large flow rate, but also has a high water production amount, and the sludge on the surface of the filter bag can be directly sprayed and washed with a high-pressure water column, which is quite convenient.

In addition, in order to suppress the deposition effect of the sludge on the surface of the filter bag (filter cake), the conventional sewage treatment equipment, in addition to the air in the bottom of the sewage inlet tank to increase the disturbance of the water surface to the membrane surface, The bag rotates in the water inlet tank, and when the rotating filter bag is in contact with the feed liquid surface, the shearing force is generated, thereby separating the filter bag from the sludge and solid particles on the surface to reduce the filtration. The bag is clogged to further prevent the filtration rate from being caused by the polarization of the sewage concentration. The related patents can be found in the invention patent No. I312767 of Taiwan.

Although the rotation of the flat capsule filter bag in the water inlet tank can achieve a certain effect of suppressing the formation of surface sludge, due to the variety of sources of feed water, in addition to the general rubber feathers, impurities and solid particles, there are still various Organic oily substance, when the oil-rich feed water comes into contact with the filter bag and adheres to the membrane surface of the filter bag, it will seriously affect the water production flow of the filter bag, especially in the case of feed water with thick oil. When the entire filter unit is covered by the oil film, even if the filter bag is washed with a high-pressure water column, the heavy oil film cannot be removed, and the operation cycle of the filter bag is also reduced, in addition to greatly reducing the flow of water. .

Therefore, how to effectively extend the operation and service life of the filter bag has become a key issue for the active improvement and development of the industry.

Therefore, the water treatment device for scraping the surface sludge of the filter membrane provided by the present invention is a scraping unit which is provided with a corresponding film bag in the treatment tank, and the brush body of the scraping unit can be in micro contact with the membrane surface of the filter bag. It can form an automatic scratching effect on the film surface when the filter bag rotates, and can avoid scratching the film surface to prolong the life cycle of the filter bag.

The water treatment device for scraping the surface sludge of the filter membrane according to the present invention comprises a treatment tank, a driving unit, a water production pipe, a filtering unit, a fastening unit and a scraping unit. The treatment tank has a tank wall, a water inlet, a discharge port, and a content chamber surrounded by the groove wall. The driving unit is disposed outside the processing tank. The water production pipe is coupled to the driving unit and pivoted in the content chamber, and the water production pipe comprises a pipe wall surrounding an axis and a plurality of through holes penetrating the pipe wall. The filter unit comprises a plurality of filter bags which are sleeved on the water production pipe, and the filter bags are arranged perpendicular to the axial direction, and each of the filter bags has a central hole communicating with the through holes. When the driving unit drives the water production pipe to rotate, the filtering unit rotates synchronously around the axis of the water production pipe. The fastening unit has a plurality of guiding discs and watertight elements, and the guiding discs are interlaced with the filter bags of the filtering unit in groups of two. The scraping unit respectively includes a plurality of agitating disks and a plurality of brush bodies, each of the agitating disks being respectively disposed between the filter bag and the guiding plate, and each of the brush bodies is mounted on an outer side of the agitating plate, and further Can be in contact with the filter bag.

According to the present invention, the water treatment device for scraping off the surface sludge of the filter membrane, wherein the filter bag of the filter unit has a membrane support plate having a sandwich structure, a first film and a second film, which are defined by the three. a chamber for dialysis of the water supply body, and the central hole extending axially and communicating with the chamber.

According to the present invention, the water treatment device for scraping off the surface sludge of the filter membrane, wherein each of the agitating discs of the scraping unit has a set of hollow loops disposed on the outer circumference of the guide disc, and radially from the hollow ring. a plurality of agitating blades extending outward from the ring, and the brush systems are disposed on an outer peripheral side of each of the agitating blades.

According to the present invention, in the water treatment apparatus for scraping off the surface sludge of the filter membrane, the brush bodies each have a tightening portion to provide a brush body fixed to the outside of the agitating blade.

According to the present invention, in the water treatment device for scraping the surface sludge of the filter membrane, the brush system is one of a non-woven fabric and a sponge.

According to the present invention, the water treatment device for scraping off the surface sludge of the filter membrane, wherein one side of the agitating blade has a sliding groove, the brush body has a base for slidingly sliding into the sliding groove, and a plurality of protrusions are arranged The bristles on the base.

According to the present invention, in the water treatment apparatus for scraping the surface sludge of the filter membrane, the discharge port of the treatment tank is located at the bottom of the center of the tank wall.

According to the present invention, in the water treatment device for scraping the surface sludge of the filter membrane, the water production pipe is normally closed adjacent to one end of the drive unit.

According to the present invention, there is provided a water treatment device for scraping a surface sludge of a filter membrane, wherein the driving unit comprises a speed reducer and a transmission shaft coupled to the speed reducer, and the transmission shaft and the water production pipe have a sleeve Bearing housing.

The water treatment device for scraping the surface sludge of the filter membrane according to the present invention further comprises a retarding unit, the retarding unit comprising a fixing rod disposed in the content chamber of the processing tank, and a plurality of pivoting members The levers on the fixing rods, and the blocking rods correspond to the brush body of the unit.

According to the above, the water treatment device for scraping the surface sludge of the filter membrane of the present invention, when the filter unit is rotated by the power, the outer soft brush body and the filter unit are filtered by the agitating disk which is rotated by inertia. The contact relationship between the bags can automatically form the action of scraping the mud on the membrane surface of the filter bag, not only effectively preventing the sludge from covering the entire filter unit, but also avoiding scratching the membrane surface, thereby prolonging the operation period of the filter unit to reduce The cost of using the filter bag.

Referring to Figures 1 and 2, an embodiment of the water treatment device for scraping the surface sludge of the filter of the present invention comprises a treatment tank 10, a driving unit 20, a water production pipe 30, a filtration unit 40, A scraping unit 50 and a fastening unit 60.

The treatment tank 10 has a tank wall 11 which is open at the top and has a funnel shape, a water inlet 12 at the top of the tank wall 11, a discharge port 13 away from the water inlet 12, and a tank wall 11 The content chamber 14 is surrounded by a level of the feed water level in the content chamber 14 that is lower than the filter unit 40. In the present embodiment, the discharge port 13 of the treatment tank 10 is located at the center of the center of the tank wall 11 to provide discharge of concentrated waste liquid and metal ions.

The driving unit 20 is disposed outside the processing tank 10, and includes a reducer 21 and a transmission shaft 22 coupled to the reducer 21. The transmission shaft 22 and the water production pipe 30 are pivoted with a bearing seat 23, Get the support and withstand the load when rotating.

The water production pipe 30 is coupled to the drive shaft 22 of the drive unit 20 and pivoted in the content chamber 14. The water production pipe 30 includes a pipe wall 31 surrounding an axis and a plurality of through holes extending through the pipe wall 31. 32. In this embodiment, one end of the water production pipe 30 that is axially connected to the transmission shaft 22 is normally closed, and the other end of the water production pipe 30 is extended to extend outside the processing tank 10, and will be under a negative pressure. The purified water filtered into the production water pipe 30 is connected to a clean water tank (not shown) for storage.

Referring to Figures 4 and 5, the filter unit 40 includes a plurality of filter bags 41 that are watertightly laminated on the water production pipe 30. The filter bags 41 are disposed perpendicularly to the axial direction of the water production pipe 30. Each of the filter bags 41 has a central hole 411 communicating with the through hole 32, a membrane supporting plate 412, a first film 413 and a second film 414, and a water supply dialysis defined by the three. Room 415. And the central hole 411 is in communication with the chamber 415. The film support plate 412 is made of a mesh-shaped plastic material and is sealed at the edge with the first film 413 and the second film 414.

The fastening unit 60 has a plurality of guiding plates 61 and a watertight member 62. The guide discs 61 are interlaced with the filter bags 41 of the filter unit 40 in groups of two, and the guide discs 61 are pinched on the periphery of the central hole 411 of the filter bag 41, and are attached by the watertight member 62. The membrane surface of the filter bag 41 is prevented from infiltrating into the water production pipe 30, and the filter bag 41 of the filter unit 40 can be interlocked and stacked by using the characteristics that the guide plates 61 can be interlocked with each other.

Each of the scraping units 50 includes a plurality of agitating disks 51 and a plurality of brush bodies 52, respectively. Each of the agitating discs 51 is interposed between the filter bag 41 and the guide disc 61, and each of the brush bodies 52 is mounted on the outer side of the agitating disc 51 so as to be in contact with the filter bag 41.

In this embodiment, each of the agitating discs 51 of the scraping unit 50 has a set of hollow loops 511 disposed on the outer circumference of the guide disc 61, and a plurality of agitating radially extending outward from the hollow loops 511. Blade 512. The brush bodies 52 are hollow sleeves having an inverted U-shaped cross section, and the brush bodies 52 respectively have a tightening portion 521 for providing a binding bundle to the inner end of the stirring blade 512, so that the brush body 52 is sleeved. On the outside of the agitating blade 512. The brush body 52 can be one of a non-woven fabric and a sponge.

Referring to Figures 1 to 3, when the speed reducer of the drive unit 20 is actuated, the water production pipe 30 is driven to rotate, so that the filter unit 40 on the water production pipe 30 also rotates synchronously, since the agitating plates 51 are worn. The pivot is on the outer circumference of the guide plate 61, and the cross-sectional area thereof is much larger than the cross-sectional area of the filter bag 41, and the relative water resistance is large, so the rotation speed of the agitation plate 51 is much smaller than the rotation speed of the filter bag 41, by the The speed difference relationship causes the brush body 52 on the outer periphery of the agitating blade 512 to form a function of scraping the membrane surface of the filter bag 41, thereby generating an action of automatically scraping the sludge, and has the effect of disturbing the water body, thereby more effectively avoiding the filtering. The fouling of the film surface of the bag 41 and the formation of the filter cake.

Further, as shown in FIG. 3, the water treatment device further includes a retarding unit 70, the retarding unit 70 includes a fixing rod 71 disposed in the content chamber 14 of the processing tank 10, and a plurality of pivoting members The levers 72 on the rod 71 are fixed, and the levers correspond to the brush body of the unit. During the rotation of the filter unit 40, the blocking lever 72 forms an intermittent blocking effect on the agitating blade 512 which is pivoted on the guiding plate 61, and increases the speed difference between the agitating blade 512 and the filter bag 41. As a result, the rotating filter bag 41 forms a frictional action with the agitating blade 512 for a longer period of time, thereby achieving a cleaning effect of the scraping film surface.

Referring to FIGS. 6 and 7 , a sliding groove 513 is disposed on each side of the other stirring blade 512 of the scraping unit 50 , and the brush body 52 is a brush bar matching the shape of the sliding slot 513 , and the brush body 52 has A base portion 522 for slidingly engaging the sliding groove 513 and a plurality of bristles 523 protruding from the base portion 522 are respectively disposed at the end of the agitating blade 512 after the respective brush body 52 has been mounted into the sliding grooves 513. A plug cap 53 made of rubber material is fixed on each end to block the brush bodies 52 from falling out. When in use, the bristles 523 are in contact with the filter bag 41, so that when the filter unit 40 is in operation, the ink accumulated on the surface of the film of the filter bag 41 can be scraped off by the bristles 523 (such as oil stains in industrial cutting fluids, etc.) .

Referring to Fig. 8, there is still another structure of the brush body of the present invention. The brush body 52 includes a base portion 524 and bristles 525 which are tapered upward from the base portion 524.

The brush bodies 52 in Figures 7 and 8 can be made of soft plastic so that the brush body 52 can achieve the effect of scraping the ink on the filter bag 41 by the soft bristles 525. The film surface of the filter bag 41 is not scratched to further increase the service life of the filter bag.

Further, the present invention utilizes the structure of the brush body 52 made of a soft material such as non-woven fabric or sponge, which is not only difficult to cause damage to the film surface of the filter bag 41, but when the brush body 52 is dirty, it is easy to use only the extraction operation. Quickly change to increase work efficiency.

In summary, the water treatment device of the present invention for scraping off the surface sludge of the filter membrane is arranged between the filter bags 41 of each filter unit 40 by the arrangement of the scraping unit 50 added in the treatment tank 10. A brush body 52 (brush or bristles), so that when the filter unit 40 rotates, the surface of the filter bag 41 can be automatically formed to wipe the mud, in addition to effectively preventing the sludge from covering the entire filter unit 40, thereby prolonging The operation cycle of the filter unit 40 is further protected by a soft brushing action, and the film surface of the filter bag 41 is prevented from being scratched, and the service life of the filter bag 41 is further improved.

However, the above is only one embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are all It should remain within the scope of this invention.

10. . . Processing tank

11. . . Slot wall

12. . . water intake

13. . . exhaustion hole

14. . . Content room

20. . . Drive unit

twenty one. . . Reducer

twenty two. . . transmission shaft

twenty three. . . Bearing housing

30. . . Water production pipe

31. . . Wall

32. . . Through hole

40. . . Filter unit

41. . . Filter bag

411. . . Central hole

412. . . Membrane support plate

413. . . First film

414. . . Second film

415. . . Room

50. . . Scraper unit

51. . . Stirring tray

511. . . Hollow ring

512. . . Stirring blade

52. . . Brush body

521. . . Tightening

522. . . Base

523. . . Brushing

524. . . Base

525. . . Brushing

53. . . Plug cover

60. . . Fastening unit

61. . . Guide disk

62. . . Watertight component

70. . . Blocking unit

71. . . Fixed rod

72. . . Barrier

Fig. 1 is a perspective view showing the appearance of a water treatment apparatus for scraping off surface sludge of a filter membrane according to an embodiment of the present invention.

Fig. 2 is a sectional view showing the combination of the production water pipe, the filter unit, and the scraping unit inside the processing tank.

Fig. 3 is a side view of the treatment tank of the embodiment, showing the use of the scraping unit in contact with the filter unit in the treatment tank.

Fig. 4 is an exploded perspective view of the embodiment, showing an exploded view of the filter unit and the scraping unit.

Fig. 5 is a sectional view showing the combination of the water production pipe, the filter unit, the scraping unit, and the fastening unit.

Fig. 6 is a sectional view similar to Fig. 5, showing a brush body structure of the brush unit.

Fig. 7 is an exploded perspective view of the agitating disk and the brush body, and is a brush body structure showing the brushing unit of the blade unit.

Fig. 8 is a sectional view showing the combination of the agitating blade and the brush body of the scraping unit, showing another brush-like brush body structure.

10. . . Processing tank

11. . . Slot wall

13. . . exhaustion hole

20. . . Drive unit

twenty one. . . Reducer

twenty two. . . transmission shaft

twenty three. . . Bearing housing

30. . . Water production pipe

50. . . Scraper unit

60. . . Fastening unit

61. . . Guide disk

Claims (10)

A water treatment device capable of scraping off sludge on a surface of a filter, comprising: a treatment tank having a tank wall, a water inlet, a discharge port, and a content chamber surrounded by the groove wall; a driving unit Provided on the outside of the processing tank; a water producing pipe connected to the driving unit and pivoted in the content chamber, and the water producing pipe includes a pipe wall surrounding an axis and a plurality of through holes penetrating the pipe wall; The unit comprises a plurality of watertightly packed filter bags disposed on the water production pipe, wherein the filter bags are disposed perpendicular to the axial direction, and each of the filter bags has a central hole communicating with the through holes respectively. The driving unit drives the water production pipe to rotate, so that the filtering unit rotates synchronously around the axis of the water production pipe; a fastening unit has a plurality of guiding plates and watertight components, and the guiding wires are in groups of two a filter bag is interlaced with the filter bag; and a scraping unit respectively includes a plurality of agitating disks and a plurality of brush bodies, each of the agitating disks being respectively sandwiched between the filter bag and the guide plate, and Each brush body Mounted on the outside of the stirring disc, and thus may be in contact with the filter bag. The water treatment device for scraping the surface sludge of the filter membrane according to the first aspect of the invention, wherein the filter bag of the filter unit has a membrane support plate having a sandwich structure, a first film and a second film. The three compartments define a chamber for dialysis of the water supply body, and the central hole that penetrates axially and communicates with the chamber. The water treatment device for scraping off the surface sludge of the filter membrane according to claim 1, wherein each of the agitation plates of the scraping unit has a set of hollow rings disposed on the outer periphery of the guide plate, and A plurality of agitating blades radially extending outward from the hollow ring, and the brush systems are disposed on an outer peripheral side of each of the agitating blades. The water treatment device for scraping the surface sludge of the filter membrane according to claim 1, wherein the brush bodies each have a tightening portion to provide a brush body fixed to the outside of the agitating blade. The water treatment device for scraping the surface sludge of the filter membrane according to the fourth aspect of the invention, wherein the brush system is one of a non-woven fabric and a sponge. The water treatment device for scraping the surface sludge of the filter membrane according to claim 3, wherein one side of the agitating blade has a sliding groove, and the brush body has a base for slidingly sliding into the sliding groove. And a plurality of bristles protruding from the base. The water treatment device for scraping the surface sludge of the filter membrane according to claim 1, wherein the discharge port of the treatment tank is located at the bottom of the center of the groove wall. The water treatment device for scraping the surface sludge of the filter membrane according to claim 1, wherein the water production pipe is normally closed adjacent to one end of the drive unit. The water treatment device for scraping the surface sludge of the filter membrane according to the first aspect of the invention, wherein the driving unit comprises a reducer and a transmission shaft coupled to the reducer, the transmission shaft and the water production pipe There is a bearing seat on each set of pivots. The water treatment device for scraping the surface sludge of the filter membrane according to claim 1, further comprising a retarding unit, wherein the retarding unit comprises a fixing rod disposed in the content chamber of the processing tank, and A plurality of blocking levers pivotally disposed on the fixing rod, and the blocking levers correspond to the brush body of the unit.