JPS625827Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solid-liquid separation device suitable for use in a filtration device attached to a bottle washer, for example, and more specifically, the present invention relates to a solid-liquid separator suitable for use in a filtration device attached to a bottle washer. This invention relates to a solid-liquid separator in a filtration device that squeezes out the liquid contained in label scum and the like removed from the filter and discharges it to the outside.

[Prior art] To give an example of a conventionally known filtration device, a separation tank is provided which communicates with the washing tank of a bottle washing machine, and a part of the drum with a screen stretched around its outer periphery is washed inside the separation tank. It is installed so that it protrudes from the liquid level into the atmosphere. Then, the cleaning liquid is sucked in from inside the rotating drum through the suction pipe, and the label residue and the like are attracted to the screen by this suction force. Thereafter, air is injected from inside toward the filter dregs that appear in the atmosphere as the rotating drum rotates, and the filter dregs are blown into the discharge chute and discharged from the discharge port below the chute.

In this way, in conventional filtration devices, the air that separates the filter slag from the drum screen is discharged from the chute outlet together with the filter slag, so steam is released along with the air, resulting in a large amount of heat dissipated and energy loss. This resulted in a defect that led to

For this reason, a device has already been proposed in which an air suction port is installed in the middle of the exhaust chute, and the sucked air is circulated through a conduit, thereby making it possible to circulate the air and suppress the dissipation of heat. has been done.

[Problems to be solved by the invention] However, in the structure in which the air suction port of the conduit is provided in the middle of the discharge chute as described above, the filter slag falling inside the discharge chute is sucked into the conduit. There is a risk that the air will be drawn to the air flow and accumulate around the air suction port in the middle of the discharge chute, clogging the air passage, so it is necessary to set the air suction port wide. First, this necessitated an increase in the size of the device. Moreover, in addition to the uncertainty in separating the filtrate from the air, the solid-liquid separator, which consists of a screw that transports the filtrate containing water while squeezing it to the discharge end, has the drawback of co-circulation, and its operation is difficult. It was accompanied by drawbacks that impaired efficiency. This is because the tube that surrounds the screw is generally composed of a punching plate, and a large number of small holes are drilled throughout the entire area to drain water, and the solid contaminants to be transported along the inner surface of the tube. Since the rotation is restricted, solid contaminants are unnecessarily shredded by the small holes during conveyance, and not only do they flow out of the small holes together with the separated liquid, but also cause clogging, co-circulation, etc. It was a factor that caused this.

In view of the above-mentioned points, the present invention is capable of reliably separating the filter slag separated and transferred from the separation tank from the circulating air, and at the same time, it is possible to reliably separate the filter slag that is separated and transferred from the separation tank, and to remove the solids in the filter slag in the screw that is to compress and convey the separated and captured water-containing filter slag. It is an object of the present invention to provide a solid-liquid separator in a filtration device that can enhance the squeezing effect and promote feeding by regulating the rotation along the inner surface of a tube without pulverizing contaminants.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention adsorbs filter dregs in the washing liquid to a screen of a rotating drum whose lower part is immersed in the washing liquid of a separation tank, Air is injected from inside the upper part of this drum to separate the adsorbed filter dregs, and the separated filter dregs is guided along with the air to the discharge side chute, and the air in the chute is circulated to the suction side of the air blower for air injection. In the filtration device, a bent portion is provided in the path of the chute, which is reversely raised from a descending path along the outer periphery of the drum, and a screw is disposed along this bent portion for dewatering and transporting the filter slag. The invention is characterized in that an axially uneven line is formed on the inner peripheral surface of the tube surrounding the discharge side of the filtrate to provide contact resistance to the filter dregs.

[Function] In the present invention, the screw provided at the inverted bent portion of the chute can reliably separate and capture only the filter cake from the air, and at the same time, uneven lines are formed on the inner surface of the tube surrounding the screw. Therefore, rotation of the solid contaminants to be conveyed along the inner surface of the tube does not occur, and it is possible to prevent the solid contaminants from being crushed and to improve the conveyance efficiency.

[Embodiments] The present invention will be described below with reference to illustrated embodiments.
Figures 1 and 2 both show an embodiment in which the solid-liquid separation device of the present invention is applied to a filtration device attached to a bottle washing machine, and 1 is connected to a washing tank of the bottle washing machine (not shown). This is a filtration device equipped with a separation tank 2, in which a rotating drum 4 that is rotationally driven by a driving machine 3 is provided. This rotating drum 4 is
As is well known, the upper part thereof is arranged horizontally so as to protrude above the liquid level of the cleaning liquid stored in the cleaning tank and the separation tank 2, and the cleaning liquid in the separation tank 2 is transferred to the rotating drum 4. After flowing into the drum through a drum screen stretched over the outer peripheral surface, the fluid is sucked out to the outside by a suction pipe (not shown) disposed inside the rotating drum. Reference numeral 5 denotes a bottom plate consisting of a trihedron consisting of a bottom surface portion 5a, an inclined surface portion 5b, and a vertical surface portion 5c, and 6 represents an outer wall whose lower end is bent into a U-shape, as shown in detail in FIG.
The bent portion 6a is horizontal in the longitudinal direction or
It is set to be slightly inclined toward the lower right in the figure, and its bent tip edge 6b is fixed in contact with the lower bent portion of the vertical surface portion 5c of the bottom plate. Reference numeral 7 denotes a plate body consisting of a sloped part 7a and a vertical surface part 7b, both edges of which are fixed in contact with left and right side walls 8 and 9, and the sloped part 7a has its upper edge 7c lower than the level of the cleaning liquid. It is disposed near the outer circumferential surface of the rotating drum 4 projecting upward to constitute a filter dregs discharge chute, and the central portion of the lower surface of the sloped portion 7a is connected to the upper edge 5d of the vertical surface portion 5c of the bottom plate. It is set to be in contact. Further, the plate body 7 is disposed at a position where its vertical surface portion 7b vertically bisects the space formed between the outer wall 6 and the vertical surface portion 5c of the bottom plate, thereby forming flow paths A and B. At the same time, the lower end edge 7d is disposed above and parallel to the bent portion 6a of the outer wall.

In the left side wall 8, as shown in FIG. A vertically long hole 8b along B is provided,
The introduction side of the duct 10 is attached to this hole 8b. The other end of the duct 10 has one side connected to an air suction port 11a of a blower 11 that pressurizes and supplies air to an air outlet (not shown) for blowing off the filter slag adhering to the rotating drum 4. It is connected in communication.

Therefore, the upper opening A' of the flow path A and the air suction port 11a of the blower are communicated through the air flow path C of the duct 10, the hole 8b in the left side wall, the flow path B, and the flow path A. The chute is configured to also serve as an air conduit. Therefore, when air is supplied from the blower 11 to the air outlet, the air sucked through the opening A' is
As shown by the arrows in the figure, all of the fluid can be forced to circulate. Reference numeral 12 denotes a solid-liquid separator provided through a hole 8a in the left side wall and a hole 9a bored in the right side wall 9 so as to block the space inside the bent portion 6a of the outer wall. The base end is connected to the drive shaft of a motor 14 for rotationally driving the base end, and this motor 1
The casing side of 4 is fixed to the left side wall 8 via a mounting pipe 15. Reference numeral 16 denotes a mounting pipe 1 which is arranged so as to surround the tip of the screw 13.
It is a throttle tube fixed to the right side wall 9 via a tube 7, and a taper 16a is formed at the inner peripheral portion of its tip, so that it is possible to apply a throttle to the filter dregs to be discharged.

As shown in FIG.
Grooves 16b and 17a extending in the axial direction are formed, respectively, to restrict the rotation of the filter slag conveyed by the rotation of the screw 13 along the inner surfaces of the tubes 16 and 17 together with the screw. Since the filter dregs are not crushed, the squeezing effect can be significantly improved. Reference numeral 16c denotes a plurality of drainage holes bored in the outer periphery of the throttle tube 16, for example, in the lower part near the tip, which are arranged in multiple rows in the circumferential direction and the axial direction of the throttle tube 16, respectively. Due to the action of the respective grooves 16b and 17a, the solid matter content due to pulverization is reduced in the drained waste water compared to the past.
The wastewater load is significantly reduced.

Reference numeral 18 denotes an adjustment plug that adjusts the degree of constriction according to the quality of the filter cake, and is attached to a threaded hole 13a provided at the tip of the screw 13 with a bolt 19, and its circumferential surface is marked with a screw in the direction of conveyance of the screw. A taper 18a is formed which widens to provide axial resistance to the filter cake. As a result, the radial load that was concentrated at the tip of the screw 13 can be dispersed radially, and at the same time, the thrust load that was applied as a component force toward the base end of the screw is reduced to a component load toward the tip of the screw. Therefore, it is possible to provide resistance in the axial direction to the filter dregs without substantially increasing the load that the screw 13 receives from the filtration dregs.

In this embodiment of the apparatus configured as described above, the blade slope of the screw 13, which is rotationally driven by the motor 14, rotates so as to always block the pitch gap B', so that the screw 13 is separated from the drum screen. The filter dregs, which have been forcibly conveyed by the air, are prevented from passing by the screw blades and are reliably captured, rolled up and forcibly conveyed in the direction of the throttle pipe 16. And the mounting pipe 17 of the throttle pipe 16
The filter dregs that have been conveyed to these pipes 16, 1
The adjustment plug 18 is sent to the taper portion 16a while its movement in the circumferential direction is regulated by the grooves 16b and 17a formed on the inner surface of the tube 7, and after being narrowed by the taper portion, the adjustment plug 18 is moved from the tip opening of the throttle tube 16 to the taper of the adjustment plug 18. It is discharged to the outside radially along line 18a. In addition, the water that comes out when squeezing the filter dregs is removed from the drain hole 16 provided in the squeezing pipe 16.
It can be made to fall from c. The filtrate thus obtained can be taken out as an effluent with a very low water content, and it is possible, for example, to transport this effluent in a cardboard box.

In the above embodiment, the adjustment plug 18 is provided at the outer end of the throttle tube opening of the screw 13, but this is replaced by an adjustment plug 20 with a small taper inclination angle as shown in FIG. Accordingly, it is also possible to provide the screw extending from the inside of the throttle tube.

Further, in the above embodiment, a groove extending in the axial direction is formed in the inner periphery of the tube surrounding the tip of the screw, but this can also be formed as a protrusion.

[Effects of the invention] As described above, according to the invention, the filter slag separated and transferred in the separation tank is reliably separated from the air at the bent part of the chute, and the captured filter dregs provided at this bent part is transported. By forming grooves in the axial direction on the inner peripheral surface of the discharge side of the tube surrounding the screw, it is possible to prevent the solid contaminants being conveyed from moving in the rotational direction, and the squeezing effect can be significantly improved. A solid-liquid separator in a filtration device that has become possible can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a partially broken solid-liquid separator in a filtration device according to an embodiment of the present invention, Fig. 2 is a side view of the one shown in Fig. 1, and Figs. 3 a, b, c.
These are enlarged views of the main parts of the present invention, and are respectively a side sectional view, a front sectional view, and a side view.
Figure 4 is a cross-sectional view of the main part for explaining the air passage.
FIG. 5 is a partial side view for explaining the hole formed in the left side wall, and FIG. 6 is a view corresponding to FIG. 3b showing another embodiment of the present invention. 12... solid-liquid separator, 13... screw, 1
6... Throttle tube, 16a, 18a... Taper, 16
b, 17a...Groove, 17...Mounting pipe, 18,2
0...Adjustment plug.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The screen of a rotating drum whose lower part is immersed in the washing liquid of a separation tank adsorbs the filtrate in the washing liquid, and air is injected from inside the upper part of this drum. In the filtration device, the adsorbed filter slag is peeled off by a filter, the separated filter sludge is guided together with air to a discharge side chute, and the air in the chute is circulated to the suction side of the air injection blower. In the path of the drum, a bent portion is provided which is reversed upward from the descending path along the outer periphery of the drum, and a screw for dehydrating and conveying the filter dregs is disposed along this bent portion, and the discharge side of the screw is disposed along the bent portion. A solid-liquid separator in a filtration device, characterized in that the inner circumferential surface of the surrounding tubular body is formed with axially uneven stripes that provide contact resistance to the filter dregs. (2) A solid-liquid separator in a filtration device according to claim 1, which is characterized in that a plurality of drainage holes are formed on the outer periphery of the pipe body. (3) In the filtration device according to claim 1 or 2 of the utility model registration claim, wherein an adjustment plug is provided at the tip of the screw to provide resistance in the axial direction to the contaminated substances to be transported. Solid-liquid separation equipment.