KR20090126424A - Treatment apparatus for suspended solids using filter membrane - Google Patents

Abstract

PURPOSE: An apparatus for treating suspended solids using fine filter membranes is provided to wash the fine filter membranes more clearly by injecting back washing water to the whole surface of the fine filter membranes. CONSTITUTION: An apparatus for treating suspended solids using fine filter membranes includes a water treatment tank(10), a rotary drum, a plurality of filtering discs(30), a rotary drum support unit, a drum rotating driving unit, an inflow pipe(60), a plurality of back-washing injection pipes(70), a plurality of inner washing waste injection pipes, a washing water supplying unit, and a floating solid materials collecting box. The water treatment tank has a filtered water discharge tank(11) and a processed water discharge pipe(13).

Description

Processing apparatus for suspended solids using microfiltration membranes

The present invention relates to an apparatus for treating suspended solids using a microfiltration membrane, and more particularly, to an apparatus for treating suspended solids using a microfiltration membrane for effectively washing a suspended solid attached to a microfiltration membrane.

In general, in the treatment of sewage, sewage, and wastewater, sewage, sewage, and wastewater are removed from sedimentation sites and inlet pumping stations, as well as removing precipitated sedimentation; Adjusting the flow rate of the influent from which the contaminants and sediment are removed in the flow rate adjusting tank; First settling the flow rate adjusted influent in the initial settling tank; Bioreaction treatment of the first precipitated influent water in a bioreactor installed in two or three stages; Precipitating the bioreaction influent in the final settler.

On the other hand, part of the surplus sludge of the final settler is returned to the initial settling tank, and the rest is transferred to the sludge concentration tank for condensation treatment, and the concentrated sludge is supplied to the dehydration facility while supplying chemicals from the chemical supply tank, followed by dehydration treatment. The dehydrated cake is transferred to a cake hopper by a cake conveyor and collected.

The final treated water precipitated in the final settler is filtered by the suspended solids filtering device using a microfiltration membrane and then discharged by disinfection in UV sterilizer.

Floating solid filtration device using a conventional microfiltration membrane is assembled into a fan-shaped filter disk having a microfiltration membrane in a plurality of inlet through-holes formed on the outer peripheral surface of the rotating drum rotatably installed in the treatment tank to rotate the inflow water introduced into the rotating drum As the inflow water flowing into the drum and the fan-shaped filter disc passes through the microfiltration membrane of the filter disc, the suspended solids remain on the inner side of the microfiltration membrane, and only the filtered treated water flows into the treatment tank.

The treated water introduced into the treated water tank is first flowed into the treated water discharge tank partitioned by a first-class wall on one side of the treated water tank, and is discharged through the treated water discharge pipe connected to the treated water discharge tank and transferred to the UV sterilization site.

In this process, suspended solids adhere to the inner surface of the microfiltration membrane of the rotating drum, thereby degrading filtration performance.

Therefore, in the conventional suspended solid filtration device using a microfiltration membrane, a backwash water injection pipe is installed between a plurality of filtration discs to inject a backwash water onto the outer surface of the microfiltration membrane to separate the suspended solids attached to the inside of the microfiltration membrane. have.

The suspended solids separated by the backwash water are collected and separated by the floating solids collection box installed inside the rotating drum through the inflow through hole of the rotating drum, and the collected suspended solids are discharged through the suspended solids discharge pipe installed on one side of the floating solids collection box. To be discharged.

However, in the conventional apparatus, since the backwash water injection pipe is fixedly installed, the backwash water sprayed on the microfiltration membrane of the rotating drum is sprayed only at a fixed position, so that the suspended solids attached to the inner surface of the microfiltration membrane do not peel off as a whole and the backwash water The directly sprayed portion is stripped in a banded state, and the floating solids attached to the microfiltration membrane are not peeled off at the portion where the backwashing water is not sprayed, thereby degrading water treatment efficiency.

Therefore, in the past, the operation of the suspended solids filtration device using the microfiltration membrane must be stopped, and the filtration disc must be removed from the rotating drum to replace or wash the microfiltration membrane, and then reassembled. In addition, wastewater is discharged as it is, causing water pollution and environmental pollution, as well as an increase in labor costs such as removal, replacement or cleaning and reassembly of the filter disc.

Therefore, an object of the present invention is to provide an internal wash water injection pipe for directly spraying the internal washing water to the suspended solids attached to the inner surface of the microfiltration membrane of the filter disc to more effectively wash the microfiltration membrane, thereby minimizing operation interruption, Preventing water pollution and environmental pollution by preventing the discharge of untreated sewage, sewage, and waste water as it is, and the labor costs of removing, replacing or cleaning rotating drums and filter discs, and reassembly It is to provide a suspended solids processing apparatus using a microfiltration membrane to minimize the.

Another object of the present invention is to oscillate the backwash water injection pipe for spraying the backwash water on the outer surface of the microfiltration membrane of the filter disc so that the backwash water is sprayed evenly over the entire surface of the microfiltration membrane so that the microfiltration membrane is more effectively washed. It is to provide an apparatus for treating suspended solids using a microfiltration membrane.

The present invention provides a treatment tank having a filtered water discharge tank and a treated water discharge pipe partitioned by first-class walls on one side to achieve the above object; A rotating drum rotatably installed in the treatment tank, one end of which is blocked and the other end of which is open; A plurality of filtration disks coupled to an outer circumferential surface of the rotating drum and filtering inflow water introduced into the rotating drum; Rotating drum support means for rotatably supporting the rotating drum and blocking an open end of the rotating drum; Drum rotation drive means for rotating the drum; An inlet pipe for introducing inflow water such as sewage, sewage, and wastewater into the rotating drum; A plurality of backwash water injection pipes disposed between the plurality of filter discs and having a plurality of backwash water injection nozzles for injecting backwash water onto an outer surface of the filter disc; A plurality of internal wash water injection pipes installed in the filter disc and having a plurality of internal wash water injection nozzles for injecting internal wash water into the filter disc; Washing water supply means for controlling the supply of backwash water supplied to the backwash water injection pipe and the internal wash water injection pipe; It is installed in the rotary drum to collect the suspended solids separated from the rotating drum and provides a suspended solids processing apparatus using a microfiltration membrane comprising a floating solids collection box having a suspended solids discharge pipe on one side.

The suspended solids treatment apparatus using the microfiltration membrane according to the present invention installs an internal washing water injection pipe inside the filtration disc so that the internal washing water is sprayed on the inner side of the microfiltration membrane. It prevents the discharge of sewage, sewage, and wastewater that is not treated with suspended solids, and prevents water pollution and environmental pollution, and labor costs for removing, replacing, and reassembling rotary drums and filter discs. The cost can be minimized.

In addition, the apparatus for treating suspended solids using the microfiltration membrane according to the present invention includes a backwash water injection pipe swinging means for oscillating the backwash water injection pipe so that the backwash water is evenly sprayed over the entire surface of the microfiltration membrane. The effect is further improved.

Hereinafter, an apparatus for treating suspended solids using a microfiltration membrane according to the present invention will be described in detail according to an embodiment shown in the accompanying drawings.

1 to 15 shows a suspended solids treatment apparatus using a microfiltration membrane according to the present invention, Figure 1 is a front view, Figure 2 is a right side view, Figure 3 is a plan view, Figure 4 is a left side view, Figure 5 is a rotating drum And perspective view of the combined state of the filtering disk and the inlet pipe, Figure 6 is a perspective view of the combined state of the rotating drum and inlet tube, Figure 7 is a perspective view of the rotating drum, Figure 8 is a plan view of the rotating drum, Figure 9 is a combination of the rotating drum and the filtering disk 10 is a perspective view and a partially enlarged view, FIG. 10 is a front view of the coupling state of the rotating drum and the filtration disk, FIG. 11 is a view seen from the direction of arrow "A" of FIG. 10, FIG. 12 is a sectional view taken along line BB of FIG. CC line sectional drawing of FIG. 10, FIG. 14 is a perspective view which shows the oscillation means of a backwash water injection pipe, and FIG. 15 is a side view which shows the backwash water injection pipe rocking means.

Floating solids treatment apparatus using a microfiltration membrane according to the present embodiment, as shown in Figures 1 to 5, the filtered water discharge tank 11 and the treated water discharge pipe 13 partitioned by the first wall 12 on one side A treatment tank (10) having; A rotating drum 20 rotatably installed in the treatment tank 10 and one end of which is blocked and the other end of which is open; A plurality of filtering disks 30 having a plurality of fan-shaped unit disks 31 coupled to the outer circumferential surface of the rotating drum 20; Rotating drum support means for rotatably supporting the rotating drum 20 and blocking an open end of the rotating drum 20; Drum rotation drive means for rotationally driving the rotary drum 20; An inflow pipe 60 for introducing inflow water such as sewage, sewage, and wastewater into the rotary drum 20; A plurality of backwash water injection pipes (70) installed between the plurality of filter discs (30) and having a plurality of backwash water nozzles (71); An internal washing water injection pipe (80) installed inside the filtration disc (30) and spraying the internal washing water to the inner surface of the microfiltration membrane (34); Washing water supply means for controlling the supply of the backwash water supplied to the backwash water injection pipe (70) and the internal wash water injection pipe (80); Is installed in the rotary drum 20 is configured to include a floating solids collection box 100 having a floating solids separated from the rotating drum 20 and having a floating solids discharge pipe 101 on one side.

The treatment tank 10 is composed of a general civil structure, such as concrete structures.

The first-class wall 12 that divides the treatment tank 10 and the treatment water discharge tank 11 is installed lower than the height of the treatment tank 10.

The upper portion of the treatment tank 10 is provided with a frame 14 for mounting the drum rotation drive means, etc., the frame 14 is a cover for protecting the filter disk 30 and preventing the inflow of rain water (15) is detachably installed.

The treated water discharge pipe 13 is installed through the discharge side wall 10b of the treated water tank 10.

The rotating drum 20 has a cylindrical drum body 21 whose one end is blocked by a disc-shaped blocking wall 22 and the other end is open, and a predetermined interval in the longitudinal direction and the circumferential direction on the outer circumferential surface of the cylindrical drum body 21. An inflow water passage 23 disposed; It comprises a drum shaft 24 fixed to the center of the disk-shaped blocking wall 22, and a cylindrical shaft 25 coupled to the other side of the cylindrical drum body 21.

A coupling protrusion 26 for coupling the filtration disk 30 is protruded around the inflow passage 23 of the drum body 21.

The unit disk 31 of each of the filtering disks 30 has an inner circumferential portion coupled to an outer circumferential surface of the rotating drum 20 and an influent water inlet communicating with the inflow passage 23 of the rotating drum 20 on the inner circumferential side thereof ( A pair of fan-shaped disk frames 32 arranged at regular intervals such that 33 is formed; 32, and the microfiltration membrane 34 attached to both sides of the disk frame 31 is provided.

It is preferable that the outer circumference portion blocking material 32a and the both side portion blocking materials 32b are integrally formed by welding or the like on the outer circumference portion and both sides of the disk frame 32.

The pair of disk frames 32 are coupled by a plurality of fixing bolts 35a and fixing nuts 35b.

The unit disks 31 have a "c" shaped clamping piece 36 on the disk frame 32 of each unit disk 31 and fasten the fixing bolt 37a to the clamp piece 36 and the disk frame 32. It is coupled by fastening the clamping nut 37b to this clamping bolt 37a.

The microfiltration membrane 34 is made of polyethylene (PE) material, the pore size is used 6㎛ ~ 40㎛.

Due to the pore size of the microfiltration membrane 34, the water level in the rotating drum 20 and the filtering disk 30 is higher than the water level of the treatment tank 10, that is, the head difference of 300 to 450 mm. It is configured to filter the suspended solids while the inflow water passes through the microfiltration membrane 34 by the difference.

The drum rotation support means are support shafts 41 and 42 installed on both sides of the treatment tank 10 and drum shaft bearings fixed to an upper end of the support 41 to support the drum shaft 24. 43, a cylindrical shaft bearing 44 fixed to the upper end of the other support 42 to support the outer circumferential surface of the cylindrical shaft 25, and a fixed cylinder 45 to which one end thereof is fixed to the other support 42. ), A blocking plate 46 which blocks the other end of the fixing cylinder 45, a supporting cylinder 47 fixed to the blocking plate 46, and one end of the supporting cylinder 47 is fixed to the outer circumferential surface thereof. And the other end is in close contact with the inner circumferential surface of the cylindrical shaft 25 in a watertight state, and is configured to include a cylindrical sealing member 48 which is fitted to be relatively rotatable.

The drum shaft bearing 43 uses a conventional radial bearing, and the cylindrical shaft bearing 44 may use two radial bearings, but the bearing is frequently damaged due to the drum load and long-term operation. Due to the difficulty in repairing, it is preferable to use slide bearings made of Leripa Robalon polyethylene or UHMWPE (GUR) containing molybdenum, which is excellent in lubricity, wear resistance, impact resistance and chemical resistance.

The cylindrical sealing member 48 is introduced into the rotating drum 20 while maintaining the watertightness between the cylindrical shaft 25 and the support cylinder 47 while allowing relative rotation of the cylindrical shaft 25 and the support cylinder 47. It has oil resistance, abrasion resistance, and elasticity so that the inflow water does not pass through the cylindrical shaft 25 and the support cylinder 47 without passing through the microfiltration membrane 34 of the filtration disk 30 and mixes with the treated water in the treatment tank 10. It is preferable to use NBR rubber material.

The stationary cylinder 45 uses a pipe having a flange 45a, sandwiches a gasket 46b for watertightness between the flange 45a and the blocking plate 46, and has a bolt 46a and a nut ( 46b).

The cylindrical sealing member 48 is fixed to the support cylinder 45 by a fixing band 48a.

The inner circumferential surface of the cylindrical shaft 25 is preferably formed in a tapered shape that extends outward to increase the contact and sealing effect with the cylindrical sealing member 48.

The drum rotation drive means is a drum drive motor 50 mounted to the frame 14 installed on the upper portion of the treatment tank 10, a drive sprocket 51 fixed to the shaft of the drum drive motor 50, and A driven sprocket 52 fixed to the drum shaft 24 and a transmission chain 53 connecting the drive sprocket 51 and the driven sprocket 52.

A reduction gear 50a is installed between the shaft of the drum driving motor 50 and the driving sprocket 51, and the driven sprocket 52 has a diameter larger than that of the driving sprocket 51 so as to drive the drum driving motor 50. It is preferable that the rotational force of the decelerating transmission to the rotating drum (20).

The inlet pipe 60 uses a conventional pipe having a flange 61, and fixes the flange 61 to an inner side surface of the inlet side wall 10a of the treatment tank 10 so as to have an inlet side wall 10a. It is installed in communication with the inlet 17 formed in the).

In fixing the flange 61 of the inlet pipe 60 to the inlet side wall 10a, a plurality of anchor bolts 62 embedded in the inlet side wall 10a are projected through the flange 61 and the anchor The fixing nut 63 is fastened to the bolt 62.

Each of the backwash water injection pipes 70 is installed with its outer circumferential end open and its inner circumferential end closed.

Each of the backwash injection pipes 70 may be constituted by one tube, but the backwash water injection nozzles 71 installed at the backwash water injection pipe 70 may be disposed at the left side thereof. The backwash water injection pipe (71) of the backwash water injection pipe (70) of the backwash water injection pipe (70) is installed so as to spray the backwash water toward the microfiltration membrane (34) of the filter disc (30). It is preferable to install so as to spray the backwash water toward the microfiltration membrane (34).

As the backwash water supplied to the backwash water injection pipe 70, it is preferable to use treated water, but if necessary, separate water or backwash water injection nozzle 71 may be used without fear of clogging.

The inner washing water injection pipe 80 is closed at its center side, and its outer peripheral end is opened, and a plurality of inner washing water injection nozzles 81 are provided.

The internal washing water injection nozzle 81 is disposed such that the internal washing water injection angle is sprayed along the inner surface of the microfiltration membrane 34 to effectively peel off the suspended solids attached to the inner surface of the microfiltration membrane 34. It is preferable.

As the internal washing water supplied to the internal washing water injection pipe 80, it is preferable to use treated water. However, if necessary, separate water or internal washing water spray nozzles 81 may be used without fear of clogging.

The washing water supply means is a pump motor (90), a pump (91) driven by the pump motor (90) and pumping the treated water in the treatment water tank to the backwash water injection pipe (80), and the pump (91). The back washing water supply pipe 92 and the internal washing water supply pipe 93 for supplying the washing water pumped from the backwash water injection pipe 70 and the internal washing water injection pipe 80, respectively.

The pump 91 has a suction part 91a connected to the treatment water tank 10, and a backwash water supply pipe 92 and an internal wash water supply pipe 93 are connected to the discharge part 91b.

The backwash water supply pipe 92 is installed at a position spaced apart from the outer circumference of the filtration disk 30.

The internal cleansing water supply pipe 93 passes through a central portion of the blocking plate 46 and has a supply pipe 93a positioned at an inlet end of the rotary drum 20 and a rotary joint at an end of the supply pipe 93a. A connecting tube 93c connected in a "T" shape through a 93b, a ring-shaped tube 93d connected to both ends of the connecting tube 93c, and a ring-shaped tube 93d connected to the rotating drum ( A plurality of branch pipes (93e) arranged to the left and right along the inner circumferential portion of 20) is connected, a plurality of radial pipes connected to the branch pipes (93e) and radially installed along the unit disk (31) 93f, and the connecting tube 93g which connects the outer peripheral side end part of the said radial direction tube 93f, and the outer peripheral side end part of the said internal washing water injection pipe 80 is comprised.

The connecting tube 93g is made of a material such as soft rubber.

When connecting the internal washing water injection pipe 80 and the radial tube 93f with a connecting tube 93g, a conventional union joint 93h is used.

Between the outer circumferential side of the unit disk 31, an air discharge tube 94 for connecting the inside and the outside of the unit disk 31 is provided.

An internal clean water control valve 95 is installed in the middle of the internal clean water supply pipe 93.

The internal wash water control valve 95 is configured to open and close according to a command of an operation control system (not shown) according to a detection signal of the water level sensor S for detecting the water level in the treatment tank 10 and the rotating drum 20. do.

The operation system is a control system for controlling the operation of the suspended solids processing apparatus using a microfiltration membrane.

As the internal washing water control valve 95, a solenoid valve or a magnet valve is used.

The suspended solids collection box 100 is fixedly installed by fixing the flange 102 formed at one end of the suspended solids discharge pipe 101 to the blocking plate 46.

Hereinafter, the processing of the suspended solids by the suspended solids treatment apparatus using the microfiltration membrane according to the present invention will be described.

When the drum drive motor 50 constituting the drum rotation drive means is driven by the operation control system of the suspended solids treatment device using the microfiltration membrane, the rotational force of the drum drive motor 50 is driven by the drive sprocket 51 and the electric chain 53. And it is transmitted to the drum shaft 24 of the rotating drum 20 through the driven sprocket 52 to rotate the rotating drum 20 in the direction of the arrow of FIG.

The rotating drum 20 is supported on the support base 31 through a drum shaft bearing 33 supporting the drum shaft 24, and the cylindrical shaft 25 is supported by the support shaft 32 through the cylindrical shaft bearing 34. Rotate while supported.

In this case, the drum shaft bearing 33 uses a general radial bearing, and the cylindrical shaft bearing 34 uses a Leripa Robalon polyethylene product or a UHMWPE (GUR) product containing molybdenum, a product having excellent lubricity, wear resistance, impact resistance, and chemical resistance. As a result, the rotational support state of the rotating drum 20 is accurately maintained even during long term operation.

When the influent, which is the final treated water precipitated in the final settler, is introduced into the rotary drum 20 through the inlet pipe 60, the influent flows through the microfiltration membrane 34 by gravity and the suspended solids are the microfiltration membrane 34. Filtered, and the filtered treated water is accommodated in the treated water tank (10).

This filtration is performed on the filtration discs 30 located in the lower half when the central axis of the rotating drum 20 is referred to, and the filtration discs 30 located in the upper half remain exposed to the atmosphere. do.

Even though the treated water level in the treated water tank 10 increases as the influent water is processed, the pore size of the microfiltration membrane 34 is about 6 μm to about 40 μm, so the treated water in the treated water tank 10 depends on the filtration resistance of the influent. The water level of the lower than the level of the inflow water in the rotating drum 20, the inflow water in the rotating drum 20 passes through the microfiltration membrane 34 by the water head difference with the treated water in the treatment tank (10).

Here, the inflow water in the rotating drum 20 and the treated water in the treated water tank 10 have a head head difference of 300 to 450 mm.

When the water level of the treated water in the treated water tank 10 becomes higher than the treated water first-class wall 61, the treated water in the treated water tank 10 flows into the treated water discharge tank 12 beyond the treated-water first-class wall 11 and is treated. The frost water discharge pipe 13 installed on one side of the water discharge tank 11 is discharged into the UV disinfection paper and then disinfected.

In this process, suspended solids are attached to the inner surface of the microfiltration membrane 34 of the filtration disc 30, and as the adhesion amount thereof increases, the filtration resistance of the influent in the rotating drum 20 to the microfiltration membrane 34 is further increased. The larger the head difference between the inflow of the rotating drum 20 and the treated water in the treatment tank 10 becomes larger.

When the water head difference is larger than the set 300 ~ 450mm the detection signal of the water level sensor (S) constituting the washing water control means installed in the rotating drum 20 is transmitted to the operation control system according to the detection signal, the operation control system according to this detection signal The inflow of the inflow water is stopped and the pump motor 90 constituting the backwash water supply means is operated so that the pump 91 pumps the treatment water in the treatment water tank 10 so that the treatment water pumped by the pump 91 is reversed. The backwash water is supplied to the backwash water injection pipe 70 through the washing water supply pipe 92, and the backwash water is sprayed on the outer surface of the microfiltration membrane 34 of the filter disc 30.

The backwash water sprayed on the outer surface of the microfiltration membrane 34 removes the suspended solids attached to the inner circumferential surface of the microfiltration membrane 34 while passing through the microfiltration membrane 34 from the outside.

The suspended solids separated from the microfiltration membrane 34 are collected by the suspended solids collection box 100 installed in the rotating drum 20.

The suspended solids collected in the suspended solids collection box 100 are discharged through the suspended solids discharge pipe 101 connected to one side of the suspended solids collection box 100.

The suspended solids discharged through the suspended solids discharge pipe 101 are processed through a conventional suspended solids treatment process.

In this backwashing process, the suspended solid attached to the microfiltration membrane 34 is a gel having particles that are fine and viscous, and are not sufficiently peeled off by simply spraying the backwashing water on the outer surface of the microfiltration membrane 34.

In the present invention, by spraying the internal washing water to the inner surface of the microfiltration membrane 34 by the internal washing water injection pipe (80) to effectively detach the suspended solids attached to the inner peripheral surface of the microfiltration membrane (34).

That is, when the water level of the inflow water in the rotating drum 20 rises above the set value, the operation control system opens the internal washing water control valve 95 according to the detection signal of the water level sensor S constituting the washing water control means, thereby opening the pump ( The treatment water pumped by 91 is supplied to the internal washing water injection pipe 80 through the internal washing water supply pipe 93 so that the internal washing water is sprayed on the inner surface of the microfiltration membrane 34 by the internal washing water injection nozzle 81.

Since the internal washing water injected from the internal washing water injection nozzle 81 to the inner side of the microfiltration membrane 34 is sprayed along the inner side with respect to the microfiltration membrane 34, the suspended solids attached to the inner side of the microfiltration membrane 34 It is reliably peeled off, and the microfiltration membrane 34 is sufficiently washed.

As described above, when the backwashing and the internal washing are completed, the level of the inflow water in the rotating drum 20 is lowered, and when the level is lowered to the set level, the operation control system closes the internal washing water control valve 95 and After this, the inflow of the influent resumes normal operation.

In addition, when the microfiltration membrane 34 of the filtration disk 30 is damaged and the inflow water flows into the treatment tank 10 without receiving the filtration resistance, the water level in the treatment tank 10 and the rotating drum 20 are the same. In this case, the operation of the suspended solids processing apparatus using the microfiltration membrane is stopped by the operation control system according to the detection signal of the water level sensor S.

If the operation is stopped, the manager repairs and replaces the microfiltration membrane 34 of the filter disc 30 and resumes operation.

In addition, the suspended solids treatment apparatus using the microfiltration membrane of the present invention by allowing the backwash water injection pipe 70 to swing between the filter discs 30 so as to obtain an equal backwashing effect on the entire microfiltration membrane 34. It further comprises a backwash water injection pipe shaking means.

As shown in FIG. 15, the backwash water injector oscillating means has one end of the crank plate 111 fixed to the shaft of the oscillating drive motor 110, the oscillating drive motor 110, and the crank plate 111. The connecting rod 112 and the one end connected to the other end of the connecting rod 112 so as to be relatively rotatable in an eccentric state, and the other end thereof is a swing that is fixed to the backwash water supply pipe 92. And an arm 113 and a backwash water supply pipe support 114 for rotatably supporting the backwash water supply pipe 92.

The swing drive motor 110 is installed on the cover 15.

The reducer 110a is installed between the shaft of the oscillating drive motor 110 and the crank plate 111.

The backwash water supply pipe support part 114 is composed of a radial bearing fixed to one side of the cover 15.

At the outer circumferential side end portion of the backwash water supply pipe 92, a counterweight 115 is installed to maintain the balance of the backwash water supply pipe 92 during the rocking operation.

The backwash water injection pipe oscillating means is the crank plate 111 is rotated when the swing drive motor 110 is operated, the rotational force of the crank plate 111 is backwashed through the connecting rod 112 and the swing arm 113 The backwash water injection pipe 70 is delivered to the water spray pipe 70 and the backwash water is sprayed on the outer surface of the microfiltration membrane 34 from the backwash water injection nozzle 71, so that the backwash water injection pipe 70 is oscillated on the front surface of the microfiltration membrane 34. The equal backwash water is sprayed evenly so that the backwashing effect on the suspended solids attached to the inner surface of the microfiltration membrane 34 is increased.

1 to 15 shows a suspended solids treatment apparatus using a microfiltration membrane according to the present invention,

1 is a front view,

2 is a right side view,

3 is a plan view,

4 is a left side view,

5 is a perspective view of the combined state of the rotating drum and the filter disk and the inlet pipe,

6 is a perspective view of the coupling state of the rotating drum and the inlet pipe,

7 is a perspective view of the rotating drum,

8 is a plan view of the rotating drum,

9 is a perspective view and a partially enlarged view of the coupling state of the rotating drum and the filtering disk,

10 is a front view of the coupling state of the rotating drum and the filtering disk,

FIG. 11 is a view from the arrow “A” in FIG. 10;

12 is a cross-sectional view taken along the line B-B of FIG. 10;

13 is a cross-sectional view taken along the line C-C of FIG.

14 is a perspective view showing the swing means of the backwash water injection pipe,

15 is a side view showing the backwash water injection pipe shaking means.

** Description of symbols for the main parts of the drawing **

10: treated water tank 11: treated water discharge tank

20: rotating drum 24: drum shaft

25: cylindrical shaft 30: filter disc

31: unit disk 32: disk frame

34: microfiltration membrane 41,42: support

43: drum shaft bearing 44: cylindrical shaft bearing

45: fixed cylinder 46: blocking plate

47: support cylinder 48: cylindrical sealing member

50: rotation drive motor 60: inlet pipe

70: backwash water injection pipe 80: internal wash water injection pipe

90: pump motor 91: pump

92: backwash water supply pipe 93: internal wash water supply pipe

94: air discharge tube 95: internal wash water control valve

100: suspended solids collection box 101: suspended solids discharge pipe

110: swing drive motor 111: crank plate

112: connecting rod 113: swing arm

114: backwash water supply pipe support

Claims (13)

A treatment water tank (10) having a filtered water discharge tank (11) and a treatment water discharge pipe (13) partitioned by one side wall (12) on one side; A rotating drum 20 rotatably installed in the treatment tank 10 and one end of which is blocked and the other end of which is open; A plurality of filtration disks 30 coupled to the outer circumferential surface of the rotating drum 20 to filter the inflow water introduced into the rotating drum; Rotating drum support means for rotatably supporting the rotating drum 20 and blocking an open end of the rotating drum 20; Drum rotation drive means for rotationally driving the rotary drum 20; An inflow pipe 60 for introducing inflow water such as sewage, sewage, and wastewater into the rotary drum 20; A plurality of backwash water injection pipes (70) installed between the plurality of filtration discs (30) and having a plurality of backwash water injection nozzles (71) for injecting backwash water to an outer surface of the filtration disc; A plurality of internal wash water injection pipes (80) installed in the filter disc (30) and having a plurality of internal wash water injection nozzles (81) for injecting internal washing water into the filter discs; Washing water supply means for controlling the supply of the backwash water supplied to the backwash water injection pipe (70) and the internal wash water injection pipe (80); Float using a microfiltration membrane installed in the rotary drum 20 to collect the suspended solids separated from the rotary drum 20 and comprises a suspended solids collection box 100 having a suspended solids discharge pipe 101 on one side. Solids processing unit. The method of claim 1, The rotating drum 20 has a cylindrical drum body 21 whose one end is blocked by a disc-shaped blocking wall 22 and the other end is open, and a predetermined interval in the longitudinal direction and the circumferential direction on the outer circumferential surface of the cylindrical drum body 21. An inflow water passage 23 disposed; It comprises a drum shaft 24 fixed to the center of the disc-shaped blocking wall 22, and a cylindrical shaft 25 coupled to the other side of the cylindrical drum body 21, The unit disk 31 of each of the filtering disks 30 has an inner circumferential portion coupled to an outer circumferential surface of the rotating drum 20 and an influent water inlet communicating with the inflow passage 23 of the rotating drum 20 on the inner circumferential side thereof ( A pair of fan-shaped disk frames 32 arranged at regular intervals such that 33 is formed, an outer circumferential blocker 32a for blocking the outer circumference of the pair of disk frames 32, and the pair of disk frames ( 32. A suspended solids processing apparatus using a microfiltration membrane, characterized in that it comprises a both sides blocking material (32b) for blocking both sides of the 32 and the microfiltration membrane (34) attached to both sides of the disk frame (31). The method according to claim 1 or 2, The drum rotation support means are support shafts 41 and 42 installed on both sides of the treatment tank 10 and drum shaft bearings fixed to an upper end of the support 41 to support the drum shaft 24. 43, a cylindrical shaft bearing 44 fixed to the upper end of the other support 42 to support the outer circumferential surface of the cylindrical shaft 25, and a fixed cylinder 45 to which one end thereof is fixed to the other support 42. ), A blocking plate 46 which blocks the other end of the fixing cylinder 45, a supporting cylinder 47 fixed to the blocking plate 46, and one end of the supporting cylinder 47 is fixed to the outer circumferential surface thereof. And the other end is in contact with the inner circumferential surface of the cylindrical shaft (25) in close contact with the floating solid material processing apparatus using a microfiltration membrane, characterized in that it comprises a cylindrical sealing member (48) fitted to rotate relative. The method of claim 3, The drum shaft bearing (43) is a radial bearing, the cylindrical shaft bearing (44) is a suspended solids processing apparatus using a microfiltration membrane, characterized in that the slide bearing excellent in lubricity, wear resistance, impact resistance, chemical resistance. The method of claim 3, The cylindrical sealing member 48 is suspended solids processing device using a microfiltration membrane, characterized in that consisting of NBR rubber material having oil resistance, wear resistance and elasticity. The method according to claim 1 or 2, The drum rotation drive means is a drum drive motor 50 mounted to the frame 14 installed on the upper portion of the treatment tank 10, a drive sprocket 51 fixed to the shaft of the drum drive motor 50, and Floating solids processing apparatus using a microfiltration membrane, characterized in that composed of a driven sprocket 52 fixed to the drum shaft 24, and a transmission chain 53 connecting the drive sprocket 51 and the driven sprocket 52 . The method of claim 1, Each of the backwash injection pipes 70 is composed of two tubes, and the backwash water injection nozzles 71 installed at one backwash water injection pipe 70 are microfiltration membranes of the filtration disc 30 located at the left side of the backwash injection pipes 70. It is installed to spray the backwash water toward (34), the backwash water injection pipe 71 of the other backwash water injection pipe 70 toward the microfiltration membrane 34 of the filter disc 30 located on the right side thereof. Floating solids processing device using a microfiltration membrane characterized in that it is installed to spray the backwash water. The method of claim 1, The internal washing water spray nozzle (81) is suspended solids treatment apparatus using a microfiltration membrane, characterized in that the internal washing water injection angle is arranged to be sprayed along the inner surface of the microfiltration membrane (34). The method according to claim 1, 7 or 8, The washing water supply means is a pump motor (90), a pump (91) driven by the pump motor (90) and pumping the treated water in the treatment water tank to the backwash water injection pipe (80), and the pump (91). A microfiltration membrane, comprising a backwash water supply pipe 92 and an internal wash water supply pipe 93 for supplying the washing water pumped from the backwash water injection pipe 70 and the internal wash water injection pipe 80, respectively. Floating solids processing device using. The method of claim 9, The pump 91 has a suction part (91a) is connected to the treatment tank 10, the discharge portion (91b) is a microfiltration membrane, characterized in that the backwash water supply pipe 92 and the internal wash water supply pipe 93 is connected Floating solids processing device using. The method of claim 10, The backwash water supply pipe 92 is installed at a position spaced apart from the outer circumference of the filter disc 30, The internal cleansing water supply pipe 93 passes through a central portion of the blocking plate 46 and has a supply pipe 93a positioned at an inlet end of the rotary drum 20 and a rotary joint at an end of the supply pipe 93a. A connecting tube 93c connected in a "T" shape through a 93b, a ring-shaped tube 93d connected to both ends of the connecting tube 93c, and a ring-shaped tube 93d connected to the rotating drum ( A plurality of branch pipes (93e) arranged to the left and right along the inner circumferential portion of 20) is connected, a plurality of radial pipes connected to the branch pipes (93e) and radially installed along the unit disk (31) And a connecting tube (93g) connecting the outer peripheral end of the radial direction tube (93f) and the outer peripheral side end of the inner washing water injection pipe (80), characterized in that it comprises a microfiltration membrane. Solids processing unit. The method of claim 11, Both ends of the connecting tube (93g), the internal washing water injection pipe (80) and the radial pipe (93f) is connected to the solid joint, characterized in that the suspended solids processing apparatus using a microfiltration membrane. The method of claim 11, An internal washing water control valve 95 is installed in the middle of the internal washing water supply pipe 93, and the internal washing water control valve 95 has a water level sensor for detecting the water level in the treatment tank 10 and the rotating drum 20. Floating solids processing apparatus using a microfiltration membrane, characterized in that the opening and closing according to the command of the operation control system (not shown) according to the detection signal of S).

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