JP6753704B2 - Solid-liquid separator - Google Patents

Description

The present invention relates to a solid-liquid separator, and particularly to a solid-liquid separator that separates mustard residue from sewage containing a large amount of transferred water.

For example, sewage containing a large amount of transferred water is transferred to a water and sewage treatment facility using a jet pump or the like. When treating the sent sewage, it is first necessary to separate the residue (contaminants such as fibers and vinyl) as transfer water. As such a solid-liquid separation device, a device combining a tubular screen and a screw type dehydrator has been proposed (Patent Documents 1 and 2).

FIG. 1 of Patent Document 1 and FIG. 3 of Patent Document 2 disclose a solid-liquid separator including a drum screen having a bottomed cylinder shape and a screw-type dehydrator having a receiving port arranged below the opening thereof. Has been done. Then, in the solid-liquid separation device disclosed in FIG. 1 of Patent Document 1, a guide for discharging the residue is provided inside the drum screen, and the residue is discharged from the opening using the guide for discharging the residue. ing. Specifically, the residue discharge guide is a spiral blade attached to the inner peripheral surface of the drum screen.

In the solid-liquid separation apparatus disclosed in Patent Documents 1 and 2, the first-stage solid-liquid separation is performed by a drum screen, and the second-stage solid-liquid separation is performed by a screw type dehydrator.

Japanese Unexamined Patent Publication No. 2001-219197

Japanese Unexamined Patent Publication No. 2001-321614

However, in the solid-liquid separator disclosed in FIG. 1 of Patent Document 1 and FIG. 3 of Patent Document 2, there may be a problem that the solid-liquid separator remains in the drum screen and is not transferred to the screw type dehydrator. Specifically, in the solid-liquid separation device disclosed in FIG. 1 of Patent Document 1, a residue discharge guide is provided in the drum screen, but depending on the type of residue, the residue is formed in the blade portion of the residue discharge guide. May get caught.

Further, in the solid-liquid separation device disclosed in FIG. 3 of Patent Document 2, since the inner surface of the side wall of the drum screen is horizontal, the residue may be accumulated at the corner portion of the inner bottom and may not be discharged from the opening.

In this way, when the residue remains in the drum screen, it is necessary to periodically stop the operation of the solid-liquid separator and allow the operator to discharge the residue. Such work has a problem from the viewpoint of the work environment of the worker, and also causes a decrease in efficiency.

The present invention has been made to solve such a problem, and by providing a drum screen and a screw type dehydrator, solid-liquid separation can be performed with high efficiency, and the inside of the drum screen can be separated. It is an object of the present invention to provide a solid-liquid separation device capable of suppressing residual residue.

The solid-liquid separation device according to one aspect of the present invention is a solid-liquid separation device that separates sewage into solid and liquid and collects residue, and is a drum screen, a sewage introduction pipe, a screw type dehydrator, and a waste liquid pan. And an impeller .

The drum screen has a bottomed tubular shape in which the first end is opened and the second end is closed by an end plate, and the center of the drum screen is inclined so that the first end faces diagonally downward. It is driven to rotate around the axis.

The sewage introduction pipe is inserted into the drum screen from the first end portion formed by the opening, and discharges the sewage toward the end plate.

The screw type dehydrator is arranged below the drum screen and dehydrates the residue while receiving the residue of the sewage flowing down from the first end along the inner peripheral surface of the drum screen. ..

The waste liquid pan is arranged below the screw type dehydrator, and discharges the waste liquid pan while receiving the water filtered by the screw type dehydrator and the drum screen.
The impeller is attached to the end plate and converts the pressure of sewage discharged from the sewage introduction pipe into the rotational driving force of the drum screen.
The screw type dehydrator extends along the central axis of the drum screen from the outside of the first end portion to the outside of the second end portion in a plan view from the vertical direction, and the residue is discharged from the first end portion. It is provided with a screw shaft that conveys from the portion toward the second end portion, and a porous tubular guide plate that covers the outer periphery thereof.
The tubular guide plate has a receiving port for receiving the sewage flowing down from the first end portion of the drum screen, and the residue conveyed by the screw shaft is outside the second end portion of the drum screen. At the position, it is equipped with an outlet for discharging to the outside.
The screw shaft has the same diameter of the screw blade in the shaft upstream portion on the receiving port side of the tubular guide plate, and the shaft downstream portion on the discharge port side of the tubular guide plate with respect to the shaft upstream portion. The diameter of the screw blade gradually decreases from the upstream side of the shaft toward the discharge port side.
The inner diameter of the tubular guide plate is a diameter corresponding to the diameter size of the screw blade in the first region corresponding to the shaft upstream portion of the screw shaft, and corresponds to the shaft downstream portion of the screw shaft. In the second region, the diameter gradually decreases from the upstream side of the shaft toward the discharge port side according to the diameter size of the screw blade.
The screw shaft has two screw blades in the upstream portion of the shaft.
In the tubular guide plate, when the end on the upstream side of the shaft is the upstream end and the end on the downstream side of the shaft is the downstream end, the receiving port is in the first region. The drum screen and the sewage introduction pipe are provided on the drum screen only on the upstream end side of the boundary portion between the upstream end portion and the first region and the second region. When viewed from the front from the tubular axis direction, the outlet of the sewage introduction pipe is above the tubular axis of the drum screen and is offset in one of the left and right directions.

In the solid-liquid separation device according to this embodiment, the primary separation can be performed by a drum screen and the secondary separation can be performed by a screw type dehydrator. By performing the two-step solid-liquid separation in this way, even when sewage containing a large amount of transferred water (jet water) is transferred, solid-liquid separation can be performed with high efficiency.

Further, in the solid-liquid separation device according to this embodiment, since the screw type dehydrator is arranged below the drum screen, the occupied space can be suppressed to a small size. Therefore, the installation of this device becomes easy. Then, the screw type dehydrator is located below the drum screen, and the sewage (sewage containing the residue) flowing down from the drum screen is introduced into the screw type dehydrator. Therefore, the transfer of sewage from the drum screen to the screw type dehydrator does not require a separate device, and the manufacturing cost can be reduced and the space can be saved.

Further, in the solid-liquid separation device according to this aspect, the drum screen is provided so as to be tilted so that the opened first end portion faces diagonally downward. Therefore, as the first step, the solid-liquid separated sewage (sewage containing the residue) in the drum screen is discharged from the first end only by rotating the drum screen. Therefore, even when the apparatus is operated for a long period of time, the residue remaining in the drum screen can be reduced, and the frequency of cleaning work can be suppressed to a low level. As a result, the running cost can be reduced.

Further, in the solid-liquid separator according to this embodiment, since the waste liquid pan is provided below the screw type dehydrator, the water separated and filtered by the drum screen and the screw type dehydrator can be collectively discharged. As a result, drainage in the device can be performed efficiently.
Further, in the solid-liquid separation device according to this aspect, since the discharge port in the tubular guide plate is provided at a position outside the second end portion of the drum screen, when water drips from the drum screen or the like. However, the water is discharged from the discharge port and does not get on the residue. Therefore, solid-liquid separation can be reliably performed.
Further, in the solid-liquid separation device according to this embodiment, the diameter of the screw blade and the inner diameter of the tubular guide plate are formed as described above, so that the solid-liquid separation function in the upstream portion of the shaft and the downstream portion of the shaft are formed. The dehydrator function can be exhibited with high efficiency. The term "same" as used above includes not only the case where the sizes are completely the same, but also the range of variations such as manufacturing errors.
Further, in the solid-liquid separator according to this aspect, in the screw type dehydrator, the screw shaft has two screw blades at the upstream portion of the shaft, so that the residue effectively contacts the inner surface of the tubular guide plate. Moreover, the contact length can be made long. Therefore, the residue can be quickly sent to the downstream part (dewatering part) of the shaft. As a result, highly efficient solid-liquid separation can be realized.
Further, since the solid-liquid separation device according to this embodiment is provided with an impeller, the kinetic energy of the sewage discharged from the sewage introduction pipe can be recovered, so that energy saving can be achieved. Further, by using the recovered energy, the size of the drive source such as a motor can be reduced, and the manufacturing cost and the running cost can be reduced.

Therefore, in the solid-liquid separation device according to this embodiment, by providing a drum screen and a screw type dehydrator, solid-liquid separation can be performed with high efficiency, and residual residue in the drum screen can be suppressed. Can be done.

In the solid-liquid separation device according to another aspect of the present invention, in the above configuration, the inclination angle of the central axis of the drum screen is 5 ° to 40 ° with respect to the horizontal plane.

In the solid-liquid separation device according to this aspect, since the drum screen is tilted in the above range, the separated residue is reliably discharged from the opened first end portion while efficiently performing the primary separation. be able to. Therefore, by setting the inclination angle in the above range, it is possible to achieve both highly efficient solid-liquid separation and prevention of residue residue in the drum screen.

In the solid-liquid separation device according to another aspect of the present invention, in the above configuration, the pitch of the screw blades on the screw shaft is the same in the shaft upstream portion, and in the shaft downstream portion, from the shaft upstream portion side. It gradually narrows toward the outlet side.

In the solid-liquid separation device according to this aspect, by defining the pitch of the screw blades as described above, the captured residue can be quickly sent from the upstream portion of the shaft to the downstream portion of the shaft. The same applies to the term "same" in this embodiment.

In the above configuration, the solid-liquid separator according to another aspect of the present invention has a range of 0.3 mm to 0.5 mm between the outer peripheral end of the screw blade and the inner peripheral surface of the tubular guide plate. There is a gap between them. In the solid-liquid separation device according to this aspect, clogging of the residue inside the screw type dehydrator can be effectively suppressed without attaching a scraper to the outer peripheral edge of the screw blade. It is conceivable that the gap is set to less than 0.3 mm to make the gap as narrow as possible, but in this embodiment, it is set to 0.3 mm or more in consideration of processing accuracy.

In the solid-liquid separation device according to another aspect of the present invention, in the above configuration, the region where the opening ratio of the tubular guide plate corresponds to the shaft downstream portion of the screw shaft is located upstream of the screw shaft. It is smaller than the area corresponding to the part.

In the solid-liquid separator according to this aspect, in the screw type dehydrator, water can be efficiently separated from the residue at the upstream portion of the shaft having a high opening ratio of the tubular guide plate, and the downstream portion of the shaft having a low opening ratio. It is possible to exert a high compression function (dehydration function).

The solid-liquid separation device according to another aspect of the present invention further includes a saucer in the above configuration. The saucer is arranged below the drum screen and above the downstream portion of the shaft in the screw type dehydrator, and guides the water filtered by the drum screen to the waste liquid pan. Then, the saucer is inclined along the drum screen.

In the solid-liquid separator according to this embodiment, since the saucer is arranged below the drum screen and above the shaft downstream portion of the screw type dehydrator, the water discharged through the screen of the drum screen can be discharged. It is possible to prevent the screw type dehydrator from dripping on the downstream side of the shaft.

Further, in the solid-liquid separation device according to this embodiment, since the saucer is tilted along the drum screen, it is possible to prevent the water discharged from the drum screen from accumulating on the saucer and promptly discharge it to the waste liquid pan. can do.

In the above configuration, the solid-liquid separation device according to another aspect of the present invention further includes a single drive motor and a transmission mechanism for transmitting the rotational driving force of the drive motor to the drum screen and the screw shaft.

In the solid-liquid separator according to this embodiment, the drum screen and the screw type dehydrator can be driven by a single drive motor, so that the manufacturing cost can be reduced and the space can be saved.

In the solid-liquid separation device according to another aspect of the present invention, in the above configuration, the portion of the sewage introduction pipe inserted into the drum screen is inclined along the central axis of the drum screen.

In the solid-liquid separator according to this embodiment, since the insertion portion of the sewage introduction pipe into the drum screen is inclined along the central axis of the drum screen, the sewage discharged from the sewage introduction pipe is deeply deepened in the drum screen. It becomes possible to send. As a result, the solid-liquid separation function of the drum screen can be more exerted.

The solid-liquid separation device according to each of the above aspects can perform solid-liquid separation with high efficiency by providing a drum screen and a screw type dehydrator, and can suppress the residue of residue in the drum screen. it can.

It is a schematic cross-sectional view which shows the structure of the solid-liquid separation apparatus 1 which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the transmission path of the rotational driving force in a solid-liquid separation apparatus 1. It is a schematic cross-sectional view which shows the structure of the drum screen 10 in the structure of a solid-liquid separation apparatus 1. It is a schematic cross-sectional view which shows the structure of the screw type dehydrator 12 among the structure of a solid-liquid separation device 1. (A) is a schematic cross-sectional view showing the configuration of the drum screen 30 among the configurations of the solid-liquid separation device according to the second embodiment of the present invention, and (b) is from the direction of arrow C in (a). It is a schematic plan view which looked at the drum screen 30. It is a schematic cross-sectional view which shows the structure of the screw type dehydrator 32 in the structure of the solid-liquid separation apparatus which concerns on 3rd Embodiment of this invention. It is a schematic cross-sectional view which shows a part of the structure of the screw type dehydrator among the structure of the solid-liquid separation apparatus which concerns on 4th Embodiment of this invention. In the screw type dehydrator, the image shows the relationship between the gap between the outer peripheral end of the screw blade and the inner peripheral surface of the tubular guide plate and the presence or absence of clogging of the residue, and (a) shows the gap of 0. It is an example in which the range is in the range of .3 mm to 0.5 mm, and (b) is a comparative example in which the gap is 1.5 mm. It is a schematic cross-sectional view which shows a part of the structure of the screw type dehydrator among the structure of the solid-liquid separation apparatus which concerns on 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The form described below is an aspect of the present invention, and the present invention is not limited to any of the following forms except for its essential configuration.

[First Embodiment]
1. Overall Configuration of Solid-Liquid Separator 1 The overall configuration of the solid-liquid separator 1 according to the present embodiment will be described with reference to FIG. In the drawings attached to the present specification including FIG. 1, the X direction and the Y direction are axial directions along the horizontal plane.

As shown in FIG. 1, the solid-liquid separation device 1 includes a drum screen 10, a sewage introduction pipe 11, a screw type dehydrator 12, a transmission mechanism 14, and a saucer 15 housed inside the casing 13. , A waste liquid pan 16 is provided. A part of the sewage introduction pipe 11, a part of the screw type dehydrator 12, and a part of the transmission mechanism 14 are extended outward through the casing 13.

Further, the solid-liquid separation device 1 includes a drive motor 17, sprockets 124, 144, 171 and drive chains 18 and 19 outside the casing 13.

The drum screen 10 has a bottomed cylindrical shape, and an end portion (first end portion) on the left side in the X-axis direction is opened. The drum screen 10 is arranged so that its central axis Ax ₁₀ is inclined with respect to the X direction, and the opening thereof faces diagonally downward. The drum screen 10 receives a rotational driving force from the transmission mechanism 14 and rotates around the central axis Ax ₁₀ .

The tip of the sewage introduction pipe 11 is inserted inward through the opening of the drum screen 10, and the sewage is discharged toward the inner bottom surface (end plate) of the drum screen 10 (arrow A ₁ ). Here, the sewage discharged from the sewage introduction pipe 11 is assumed to be sewage containing a large amount of transferred water (jet water).

The screw type dehydrator 12 includes a screw shaft 120, and is arranged downward in the Z direction at intervals with respect to the drum screen 10. A part of the screw type dehydrator 12 on the right side in the X direction extends outward from the casing 13. The central axis Ax ₁₂ of the screw shaft 120 is arranged substantially parallel to the X direction.

A part of the screw shaft 120 on the left side in the X direction extends outward from the casing 13, and a sprocket 124 is attached to the shaft end portion. As a result, the screw shaft 120 receives a rotational driving force via the drive chain 18 and rotates around the central shaft Ax ₁₂ .

The transmission mechanism 14 includes a drive wheel 140 in which rubber is wound around the outer circumference of the shaft 141. The drum screen 10 is placed on the drive wheel 140 and the driven wheel described later, and the outer peripheral surface is in close contact with the drive wheel 140 and the driven wheel.

The drive foil 140 is tilted along the drum screen 10, and the driven foil is similarly tilted. The shaft 141 extends in the lower left direction. Then, the shaft 143 provided through the casing 13 is connected to the universal joint 142. A sprocket 144 is attached to the outer shaft end portion of the casing 13 of the shaft 143. In the sprocket 144, the rotational driving force from the drive motor 17 is transmitted by the drive chain 19.

The drive chain 18 is stretched so as to orbit between the sprocket 171 attached to the output shaft of the drive motor 17 and the sprocket 124 of the screw type dehydrator 12. The drive chain 19 is stretched so as to orbit between the sprocket 124 and the sprocket 144. However, when the rotation speed of the drum screen 10 and the rotation speed of the screw shaft 120 are different from each other, the sprockets attached to the screw shaft 120 can be two sprockets having different gear numbers. .. Then, by hanging the drive chains 18 and 19 on different sprockets, the rotation speeds of the drum screen 10 and the screw shaft 120 can be made different from each other.

The saucer 15 is arranged in the space between the drum screen 10 and the screw type dehydrator 12 in the Z direction, and covers the upper part of the screw type dehydrator 12 on the right side in the X direction. The pan 15 is inclined in a state along the drum screen 10, receives the water discharged from the drum screen 10 (arrow A _2), is guided to the waste pan 16. Here, the guide portion of the saucer 15 to the waste liquid pan 16 is arranged so as to avoid the screw type dehydrator 12. As a result, the water separated by the drum screen 10 is prevented from being mixed with the residue again.

The waste liquid pan 16 is arranged below the screw type dehydrator 12 in the Z direction, and is provided so as to cover the inner cross section of the casing 13. The waste liquid pan 16 collects the water (arrow A ₂ ) discharged from the drum screen 10 and collected in the saucer 15 and the water (arrow A ₄ ) discharged from the screw type dehydrator 12, and discharges the water to the waste liquid recovery container 20. (Arrow A ₅ ) This is a bread for making.

As shown in FIG. 1, a residue recovery container 21 for collecting the residue separated from water is provided below the casing 13 in the Z direction. Sewage It is the primary separation drum screen 10 comprising residue (arrow A ₃₎ are secondary separation and dehydration with a screw dehydrator 12 is made, residue from the X-direction the right end portion of the screw dehydrator 12 collection vessel It is discharged to 21 (arrow A ₆ ).

2. Transmission path of rotational driving force in solid-liquid separator 1 The transmission path of rotational driving force in solid-liquid separator 1 will be described with reference to FIG.

As shown in FIG. 2, in the solid-liquid separation device 1, a drum screen 10, a screw type dehydrator 12, and a waste liquid pan 16 are arranged in order from the upper side in the Z direction inside the casing 13. In FIG. 2, the saucer 15 is not shown. Here, the central axis _{Ax 10} of the drum screen 10, the central axis _{Ax 12} of screw dehydrator 12, are arranged at the same position in the Y direction. In other words, the drum screen 10 and the screw dehydrator 12 when viewed in plan from the one in the Z direction, the central axis Ax ₁₀ of the drum screen 10, the central axis Ax ₁₂ of screw dehydrator 12, overlaps It is arranged like this.

As shown in FIG. 2, the outlet of the sewage introduction pipe 11 is offset diagonally upward to the left with respect to the central axis Ax ₁₀ of the drum screen 10.

The drum screen 10 is placed on the drive wheel 140 and the driven wheel 220 arranged side by side. The drive wheel 140 is configured to transmit the rotational driving force from the drive motor 17 via the drive chain 19 and the drive chain 18. As a result, the drum screen 10 is rotated around the central axis Ax ₁₀ due to the contact friction with the drive wheel 140.

In the screw type dehydrator 12, the rotational driving force from the drive motor 17 is transmitted via the drive chain 18, and the screw type dehydrator 12 is rotated around the central axis Ax ₁₂ .

Further, the casing 13 is also provided with a cleaning nozzle 23 for injecting cleaning water toward the drum screen 10 and a cleaning nozzle 24 for injecting cleaning water toward the screw type dehydrator 12.

Here, the sewage injected from the sewage introduction pipe 11 toward the drum screen 10 is accompanied by fluctuations in the type of residue contained therein, the injection pressure, and the like. Therefore, it is conceivable that an overload state may occur with respect to the rotation of the drum screen 10. However, in the present embodiment, since the drum screen 10 is rotated by the contact resistance with the drive wheel 140, the drive motor 17 is rotated. It is possible to prevent an overload state.

3. Configuration of Drum Screen 10 The configuration of the drum screen 10 will be described in a little more detail with reference to FIG.

As shown in FIG. 3, the drum screen 10 includes a drum screen main body 100, an end plate 101, a rotating shaft 102, and a bearing 103. The bearing 103 is attached to a frame (not shown).

The drum screen main body 100 is made of a porous material such as a woven wire mesh or a punching metal, and has a cylindrical shape. Therefore, a liquid component such as water can pass between the outer peripheral surface 10a and the inner peripheral surface 10b of the drum screen main body 100.

The first end portion 10c of the drum screen 10 is in an open state, and an end plate 101 is joined to the second end portion 10d so as to close the opening of the drum screen main body 100. The end plate 101 has a disk shape, and a rotating shaft 102 is provided on the outer main surface thereof. The rotary shaft 102 is joined so that its central axis is aligned with the central axis Ax ₁₀ of the drum screen 10.

Here, as described above, the drum screen 10 is supported so that its central axis Ax ₁₀ is inclined by an angle θ with respect to the horizontal plane Ax _H , and the opened first end portion is obliquely downward. In this way, in the drum screen 10 supported by the inclination angle θ, the introduced sewage is separated into water as water and the residue (sewage containing the residue) 500 as the first step. As shown by the arrows, the water passes through the drum screen main body 100 of the drum screen 10 in the thickness direction thereof and is discharged to the outside.

On the other hand, the sewage containing the primary separated residue 500 is transferred toward the opened first end portion 10c by the inclination (inclination angle θ) and rotation (arrow rot) of the drum screen 10, and is transferred to the first end portion 10c. It flows down from the portion 10c in the Z direction. Therefore, in the drum screen 10 according to the present embodiment, the residue 500 is unlikely to remain inside, and the frequency of cleaning work can be reduced.

It is desirable that the inclination angle θ is set in the range of 5 ° to 40 ° from the viewpoints of both the efficiency of solid-liquid separation and the prevention of residual residue 500 on the drum screen 10. The tilt angle θ is defined in relation to the viscosity of the residue 500 and the like. The lower the viscosity, the smaller the tilt angle θ, and the higher the viscosity, the larger the tilt angle θ. ..

Further, in the present embodiment, the outlet of the sewage inlet pipe 11 is arranged upward in the Z direction with respect to the central axis Ax ₁₀ of the drum screen 10, and the outlet portion is inclined along the central axis Ax _10. I have to. Therefore, the sewage discharged from the sewage introduction pipe 11 can reach the end plate 101 of the drum screen 10. Therefore, the entire area of the drum screen main body 100 can be used, and solid-liquid separation can be performed with high efficiency.

4. Configuration of Screw Type Dehydrator 12 The configuration of the screw type dehydrator 12 will be described in a little more detail with reference to FIG.

As shown in FIG. 4, the screw type dehydrator 12 includes a screw shaft 120, a tubular guide plate 121, a screw blade 122, and a back pressure cone 123. The screw shaft 120 extends in the X direction and is pivotally supported at both ends. Then, the screw shaft 120 rotates around the central shaft Ax ₁₂ by receiving a rotational driving force from the drive motor 17 (see FIGS. 1 and 2).

The tubular guide plate 121 is made of a porous material such as punching metal, and has a cylindrical shape with the central axis Ax ₁₂ as the tubular axis. The tubular guide plate 121 has a receiving port 121a opened at the left end portion in the X direction to receive sewage containing the residue 500, and the dehydrated residue is discharged to the residue collection container 21 at the right end portion in the X direction. The discharge port 121b is open. The receiving port 121a is opened upward in the Z direction, and the discharge port 121b is opened downward in the Z direction.

The tubular guide plate 121 has a cylindrical shape having a constant inner diameter in the left side portion (secondary separation portion) B ₁ in the X direction, and the inner diameter is X in the right side portion (dewatering portion) B ₂ in the X direction. It has a truncated cone shape that gradually decreases as it goes to the right in the direction. Then, than dewatering section B _2, further X-direction right part is adapted again cylindrical outlet 121b in the portion is opened.

The opening ratio of the tubular guide plate 121 may be constant in the X direction, but in the present embodiment, the opening ratio in the secondary separation portion B ₁ is the dehydration portion B ₂ on the downstream side of the opening ratio. It is higher than the aperture ratio in. For example, the opening ratio in the secondary separation section B ₁ is 30% to 60% (specific example, 40.3%), and the opening ratio in the dehydration section B ₂ is 1% to 10% (specific example, 5. 7%).

Two screw blades 122 are provided in the secondary separation portion B ₁ , and _one screw blade 122 is provided in the dehydration portion B ₂ . Further, the diameter of the screw blade 122 in secondary separation unit B ₁ is constant, the outer peripheral surface is in contact with or close to the inner circumferential surface 121d of the cylindrical guide plate 121.

The diameter of the screw blade 122 during the dewatering unit B ₂ is progressively reduced according yuku in the X-direction right, also the outer peripheral surface is in contact with or close to the inner circumferential surface 121d of the cylindrical guide plate 121.

By adopting such a cylindrical guide plate 121 and the screw vane 122, a solid-liquid separating function of the secondary separation unit B ₁ is an axial upstream portion, dehydration function in the dewatering section B ₂ is an axial downstream portion Can be demonstrated with high efficiency.

The back pressure cone 123 is provided on the right side of the dehydration portion B _{2 in} the X direction. By arranging the back pressure cone 123, the compression rate of the dehydration portion B ₂ in the screw type dehydrator 12 can be increased, and a high dehydration effect can be obtained. Although the back pressure cone 123 is schematically shown in FIG. 4, a gap through which the dehydrated residue passes is provided.

In the screw type dehydrator 12 having the above configuration, the sewage containing the residue primary separated by the drum screen 10 flows down from the first end of the drum screen 10 and is introduced into the receiving port 121a. .. Then, the sewage introduced into the internal space 121e of the tubular guide plate 121 is sent to the right in the X direction as the screw shaft 120 rotates. Then, as shown in the portion surrounded by the alternate long and short dash line in FIG. 4, the screw blade 122 is pressed against the corner portion formed in the vicinity of the proximity portion between the surface 122a and the inner peripheral surface 121d of the tubular guide plate 121. The residue 500 is sent in a compressed state. Then, on the way, water is separated from the sewage, and the separated water passes through the tubular guide plate 121 in the thickness direction thereof and is discharged outward from the outer peripheral surface 121c. The discharged water is collected in the waste liquid pan 16 and discharged to the waste liquid recovery container 20.

After being sufficiently dehydrated, the mustard residue 500 is discharged from the discharge port 121b to the mustard residue collection container 21.

5. Action / Effect In the solid-liquid separation device 1 according to the present embodiment, the solid-liquid separation can be performed in two stages by the drum screen 10 and the screw type dehydrator 12. Therefore, even when sewage containing a large amount of transferred water (jet water) is transferred, solid-liquid separation is performed by the drum screen 10 as the first step, and solidification is performed by the screw type dehydrator 12 as the second step. Liquid separation can be performed, and solid-liquid separation becomes possible with high efficiency.

Further, in the solid-liquid separation device 1, since the screw type dehydrator 12 is arranged below the Z direction (vertical direction) of the drum screen 10, the occupied space can be kept small (compactification).

Further, in the solid-liquid separation device 1, the drum screen 10 is arranged in a state of being tilted with an inclination angle θ, and the opening (first end portion 10c) is obliquely downward. Therefore, as shown in FIG. 3, the sewage containing the residue 500 primary separated by the drum screen 10 is transferred toward the first end portion 10c only by the rotation of the drum screen 500, and is transferred to the first end portion 10c. It is discharged from 10c. Therefore, even when the solid-liquid separation device 1 is operated for a long period of time, the residue 500 remaining in the drum screen 10 can be reduced, and the frequency of cleaning work and the like can be kept low. As a result, the running cost can be reduced.

Further, in the solid-liquid separator 1, since the waste liquid pan 16 is arranged below the screw type dehydrator 12 in the Z direction, the water separated and filtered by the drum screen 10 and the screw type dehydrator 12 is collected and collected. It can be discharged to the container 20. As a result, drainage in the casing 13 can be efficiently performed.

Further, in the solid-liquid separation device 1, since the inclination angle θ of the drum screen 10 is set to 5 ° to 40 °, the separated residue 500 is first used while efficiently separating the solid-liquid on the drum screen 10. It can be discharged from the end 10c. Therefore, it is possible to achieve both highly efficient solid-liquid separation and prevention of residual residue 500 in the drum screen 10.

Further, in the solid-liquid separation device 1, the discharge port 121b in the tubular guide plate 121 is provided on the outside of the casing 13 and on the right side in the X direction with respect to the second end portion 10d of the drum screen 10. Therefore, even when water drips from the drum screen 10 or the like, the water is discharged and does not hang down on the residue 500. Therefore, solid-liquid separation can be reliably performed.

Further, in the solid-liquid separator 1, by the form shown the inner diameter of the diameter and the cylindrical guide plate 121 of the screw blade 122 in FIG. 4, the solid-liquid of the secondary separating section B ₁ is an axial upstream portion The separation function and the dehydration function in the dehydration section B ₂ which is the downstream portion of the shaft can be exhibited with high efficiency.

Further, in the solid-liquid separation device 1, since the screw shaft 120 has two screw blades 122 at the secondary separation portion B ₁ , the residue is formed in the internal space 121e of the tubular guide plate 121 in the screw type dehydrator 12. The 500 can make effective contact with the inner peripheral surface 121d of the tubular guide plate 121, and the contact length can be lengthened. Therefore, the residue can be quickly transferred to the downstream portion (dehydrated portion) of the shaft. As a result, highly efficient solid-liquid separation can be realized.

Further, in the solid-liquid separation device 1, the opening ratio of the tubular guide plate 121 in the dehydration section B ₂ is made smaller than the opening ratio in the secondary separation section B ₁ . Therefore, in the screw type dehydrator 12, the secondary separation section B ₁ can efficiently separate the residue and water, and the dehydration section B ₂ having a low aperture ratio can exhibit a high compression function. It becomes.

Further, in the solid-liquid separator 1 according to the present embodiment, a lower drum screen 10, because by placing the pan 15 above the dewatering section B ₂ in the screw dehydrator 12, the drum screen 10 screen the have been discharged through in the thickness direction water, it is possible to prevent the sagging dewatering section B ₂ of screw dehydrator 12.

Further, since the saucer 15 is inclined so as to be along the drum screen 10, it is possible to prevent the water discharged from the drum screen 10 from accumulating on the saucer 15, and promptly discharge the water to the waste liquid pan 16. Can be done.

Further, in the solid-liquid separation device 1, since the drum screen 10 and the screw type dehydrator 12 are driven by a single drive motor 17, the manufacturing cost can be reduced and the space can be saved.

Further, in the solid-liquid separation device 1, since the insertion portion of the sewage introduction pipe 11 into the drum screen 10 is inclined along the central axis Ax ₁₀ of the drum screen 10, the sewage discharged from the sewage introduction pipe 11 ( deep arrow a ₁₎ the drum screen 10 in FIG. 1 (it is possible to feed into the end plate 101 side). As a result, the solid-liquid separation function of the drum screen 10 can be exhibited more highly.

Therefore, in the solid-liquid separation device 1 according to the present embodiment, the solid-liquid separation can be performed with high efficiency by providing the drum screen 10 and the screw type dehydrator 12, and the residue 500 in the drum screen 10 can be performed. Residual can be suppressed.

[Second Embodiment]
The configuration of the solid-liquid separation device according to the second embodiment of the present invention will be described with reference to FIG. Note that FIG. 5 illustrates only the configuration of the drum screen 30, which is a difference from the first embodiment of the present embodiment. The components (not shown) are the same as the components of the solid-liquid separation device 1 in the first embodiment, and the description below will be omitted.

As shown in FIG. 5A, also in the drum screen 30 according to the present embodiment, the central axis Ax ₃₀ is arranged in a state of being inclined by an angle θ (5 ° to 40 °) with respect to the horizontal plane Ax _H. There is. In the drum screen 30 according to the present embodiment, a cone-shaped impeller 304 is attached to the inner surface of the end plate 101.

As shown in FIG. 5B, the impeller 304 has a plurality of blade portions 304a, each of which has a length in the radial direction. Each blade portion 304a has a plate shape, and has a trapezoidal shape in which the width becomes narrower toward the tip of the cone.

Returning to FIG. 5A, when sewage is discharged from the sewage introduction pipe 11 inside the drum screen 30 having such a configuration, a part of the discharged sewage reaches the impeller 304. To do. The outlet of the sewage introduction pipe 11 is arranged at a position offset with respect to the central axis Ax ₃₀ of the drum screen 30 as shown in FIG. Therefore, the sewage collides with the portion of the impeller 304 that is biased in the circumferential direction, and a rotational force acts on the impeller 304.

In the present embodiment, the load of the drive motor 17 is reduced and the size of the drive motor 17 is reduced by using the rotational force generated by the collision of the sewage as described above as an auxiliary for the rotation of the drum screen 30. Can be done.

When the jet output of the sewage discharged from the sewage introduction pipe 11 is strong, the drum screen 30 can be rotated only by the rotation of the impeller 304 due to the collision of the sewage. In this case, the power transmission of the rotational driving force from the drive motor 17 to the drum screen 30 becomes unnecessary, and the drive wheel 140, the driven wheel 220, and the like can be omitted. Therefore, it is advantageous in reducing the manufacturing cost.

Further, as shown in FIG. 5B, in the present embodiment, each blade portion 304a in the impeller 304 has a flat plate shape, but a curved blade portion can also be adopted. This makes it possible to more efficiently regenerate energy when sewage collides.

The other configurations except that the impeller 304 is attached to the end plate 101 of the drum screen 30 are the same as those in the first embodiment, so that the same effect as described above can be obtained.

[Third Embodiment]
The configuration of the solid-liquid separation device according to the third embodiment of the present invention will be described with reference to FIG. Note that FIG. 6 illustrates only the configuration of the screw type dehydrator 32, which is a difference between the first embodiment and the second embodiment in the present embodiment. As for the components (not shown), each component in the first embodiment or the second embodiment can be adopted, and the description below will be omitted.

As shown in FIG. 6, the screw type dehydrator 32 according to the present embodiment includes a screw shaft 320, a tubular guide plate 321 and a screw blade 322, and a back pressure cone 323. Like the screw shaft 120, the screw shaft 320 extends in the X direction and is pivotally supported at both ends. Then, the screw shaft 320 rotates around the central shaft Ax ₃₂ by receiving a rotational driving force from the drive motor 17 (see FIGS. 1 and 2).

Like the tubular guide plate 121, the tubular guide plate 321 is also made of a porous material such as punching metal, and has a cylindrical shape with the central axis Ax ₃₂ as the tubular axis. The tubular guide plate 321 also has an inlet 321a and an outlet 321b.

The tubular guide plate 321 also has a cylindrical shape having a constant inner diameter in the secondary separation portion D ₁ , and a truncated cone shape in which the inner diameter gradually decreases as the inner diameter goes to the right in the X direction in the dehydration portion D ₂ . Have. Then, than dewatering unit D _2, further X-direction right part, has become again cylindrical outlet 321b in the portion is opened.

As for the opening ratio of the tubular guide plate 321, the opening ratio of the secondary separating portion D ₁ is higher than that of the dehydrating portion D _{2 as} in the case of the tubular guide plate 121. Screw blade 322, in the secondary separating section _{D 1,} 2 Article provided, in the dehydration unit _{D 2,} provided 1 Article. Further, the diameter of the screw blade 322 in the dehydration portion D ₂ gradually decreases as it goes to the right in the X direction.

In the screw type dehydrator 32 according to this embodiment, in the dewatering section D _2, it is gradually narrower as the pitch of the screw blade 322 yuku the X-direction left to right. Specifically, the pitch of the screw blades 322 in the dehydration section D ₂ is gradually narrowed as P ₁ > P ₂ > P ₃ > P ₄ > P ₅ .

In solid-liquid separator according to the present embodiment, by defining the pitch of the screw vane 322 as described above, to have captured it is possible to send to promptly X direction right to residue 500, the dewatering section D ₂ The compression ratio can be increased toward the latter part. Therefore, it is possible to obtain a higher dehydration function.

Note that the other configurations except for the configuration of the screw blade 322 in the dewatering section D _2, is the same as the first embodiment or the second embodiment, it is possible to obtain the same effect as described above.

[Fourth Embodiment]
The solid-liquid separator according to the fourth embodiment of the present invention will be described with reference to FIG. Note that FIG. 7 is a diagram corresponding to an enlarged portion of FIG. 4 used in the description of the first embodiment. That is, a part of the screw blade (the outer peripheral end and the peripheral part thereof) and a part of the tubular guide plate in the screw type dehydrator are extracted and illustrated.

As shown in FIG. 7, also in the screw type dehydrator according to the present embodiment, the outer peripheral end 422b of the screw blade 422 rotates in a state of being close to the inner peripheral surface 421d of the tubular guide plate 421. The present embodiment is characterized in that the gap G between the outer peripheral end 422b of the screw blade 422 and the inner peripheral surface 421d of the tubular guide plate 421 is within the range of 0.3 mm to 0.5 mm.

In the screw type dehydrator according to the present embodiment, by setting the gap G within the range of 0.3 mm to 0.5 mm, the screw does not need to have a scraper (rubber, brush, etc.) attached to the outer peripheral edge of the screw blade. It is possible to suppress clogging of the residue in the dehydrator. Therefore, since it is not necessary to attach a scraper, it is not necessary to replace parts regularly due to its abrasion, which is effective in reducing running costs, and operating efficiency is reduced by reducing the frequency of maintenance. It becomes possible to improve.

From the viewpoint of suppressing clogging of the residue, the narrower the gap G is, the better, but the gap G is set to 0.3 mm or more in consideration of the current processing accuracy and manufacturing cost.

In the manufacture of the screw type dehydrator according to the present embodiment, in order to keep the gap G within the range of 0.3 mm to 0.5 mm, the outer peripheral end 422b of the screw blade 422 and the inner peripheral surface 421d of the tubular guide plate 421 Is machined such as polishing.

Next, the relationship between the gap between the outer peripheral end of the screw blade and the inner peripheral surface of the tubular guide plate and the presence or absence of clogging of the residue will be described with reference to FIG. FIG. 8 is an image showing a confirmation result regarding the relationship between the gap between the outer peripheral end of the screw blade and the inner peripheral surface of the tubular guide plate and the presence or absence of clogging of the residue. FIG. 8A is an image showing a state in which the residue is not clogged in the embodiment (an example in which the gap G is within the range of 0.3 mm to 0.5 mm), and FIG. 8B is an image. This is an image showing a state in which the residue is clogged in a comparative example (an example in which the gap G is 1.5 mm).

As shown in FIG. 8A, in the embodiment in which the gap G is within the range of 0.3 mm to 0.5 mm, it can be visually confirmed and there is no clogging of the residue.

On the other hand, as shown in FIG. 8B, in the comparative example in which the gap G is 1.5 mm, clogging of the residue can be visually confirmed.

The example shown in FIG. 8 (a) and the comparative example shown in FIG. 8 (b) were subjected to a confirmation test under the same conditions.

[Fifth Embodiment]
The solid-liquid separation device according to the fifth embodiment of the present invention will be described with reference to FIG. Note that FIG. 9 is also a diagram corresponding to an enlarged portion of FIG. 4 used in the description of the first embodiment.

As shown in FIG. 9, in the screw type dehydrator according to the present embodiment, the scraper 525 is attached to the outer peripheral edge portion 522c of the screw blade 522. The outer peripheral end of the scraper 525 is in sliding contact with the inner peripheral surface 121d of the tubular guide plate 121.

The scraper 525 according to the present embodiment is made of an elastic member such as rubber or resin, and is attached to the outer peripheral edge portion 522c of the screw blade 522 by using, for example, bolts and nuts (not shown). abridgement).

In the screw type dehydrator according to the present embodiment, since the scraper 525 is arranged in a state of being in sliding contact with the inner peripheral surface 121d of the tubular guide plate 121, the tubular guide plate is arranged as the screw shaft rotates. A part of it has penetrated into the opening of the peripheral wall of 121, and the residue can be scraped out. Therefore, clogging of the tubular guide plate 121 can be suppressed, highly efficient dehydration can be performed over a long period of time, and the cost for maintenance can be reduced.

Further, since the screw blade 522 according to the present embodiment is premised on attaching the scraper 525, the outer peripheral end of the screw blade 522 may not come into contact with the inner peripheral surface 121d of the tubular guide plate 121. Does not require high processing accuracy. Therefore, it is possible to reduce the manufacturing cost.

Here, as for the mounting form of the scraper 525 with respect to the outer peripheral end of the screw blade 522, the scraper 525 may be mounted continuously with respect to the entire area of the outer peripheral end, or a plurality of scrapers may be intermittently mounted at intervals between them. It may be attached to.

[Modification example]
In the first embodiment and the second embodiment, the external shape and the shape of the inner space of the drum screens 10 and 30 are cylindrical as an example, but the present invention is not limited thereto. For example, a drum screen having an elliptical or oval cross-sectional shape or a drum screen having a polygonal cross-sectional shape can be adopted.

Further, in the first embodiment and the like, the drum screens 10 and 30 are rotated by the rotational driving force from the driving wheel 140 that abuts on the outer peripheral surface thereof, but the present invention is limited to this. I don't receive it. For example, a sprocket may be joined to the rotating shaft 102, and a rotational driving force may be transmitted to the sprocket. Alternatively, a gear may be engraved on the outer peripheral surface of the end plate 101 or the like, and the rotational driving force may be transmitted to the gear.

Further, in the first embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, the secondary separation unit B is provided for the cylindrical guide plates 121, 321, 421 in the screw type dehydrators 12 and 32. _Although the cylindrical shape has a constant inner diameter in ₁ and D ₁ , the present invention is not limited to this. For example, the secondary separation section may also adopt a configuration in which the inner diameter gradually decreases as it goes from the receiving port side to the dehydration sections B ₂ and D ₂ .

Further, in the first embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, the secondary separation unit B is provided for the screw blades 122, 322, 422, 522 in the screw type dehydrators 12 and 32. _Although it was decided to provide two screw blades in ₁ and D ₁ , the present invention is not limited to this. For example, it may be one article. Further, the pitches of the screw blades 122, 322, 422, and 522 in the secondary separation portions B ₁ and D ₁ do not necessarily have to be constant. Like the dewatering section _{B 2, D} 2, can be gradually narrowed structure according yuku on the side of the dewatering section _{B 2, D} 2.

Further, in the first embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, the cross sections of the outer peripheral ends of the screw blades 122, 322, 422, and 522 in the screw type dehydrators 12 and 32 are cross-sections thereof. Although the shape has a rectangular cross section, the present invention is not limited to this. For example, it may be a polygonal cross-sectional shape such as a triangle or a trapezoid, or the surface such as a semicircular cross-section or a semi-elliptical cross-section may be a curved cross-sectional shape.

Further, in the fourth embodiment, the gap G between the outer peripheral end 422b of the screw blade 422 and the inner peripheral surface 421d of the tubular guide plate 421 is set within the range of 0.3 mm to 0.5 mm. We adopted a configuration that can suppress clogging of the residue without attaching a scraper. However, the present invention does not limit the gap G to the above range. For example, by setting the gap G to 1.3 mm or less or 1.0 mm or less, clogging of the residue can be suppressed.

Further, in the fourth embodiment, the lower limit value is set to 0.3 mm from the viewpoint of processing accuracy, but if it is permissible from the viewpoint of processing accuracy and manufacturing cost, 0.1 mm or 0.2 mm is set as the lower limit value. It is also possible to do.

Further, in the fifth embodiment, the scraper 525 has a rectangular cross section, but the present invention is not limited to this. For example, it may be a polygonal cross-sectional shape such as a triangle or a trapezoid, or a surface such as a semicircular cross-section or a semi-elliptical cross-section may be a curved cross-sectional shape. Further, not only the fin-shaped scraper as shown in FIG. 9 but also a brush can be used as the scraper.

Further, in the first embodiment and the second embodiment, the portions of the sewage introduction pipe 11 inserted into the drum screens 10 and ₃₀ are inclined along the central axes Ax ₁₀ and Ax ₃₀ of the drum screens 10 and _30. However, the present invention is not limited to this. For example, the relevant portion of the sewage introduction pipe may be horizontal. Then, in order to allow the sewage to reach the end plate of the drum screen, it is possible to offset the outlet of the sewage introduction pipe upward in the vertical direction with respect to the central axis of the drum screen.

Further, as shown in FIG. 2, in the first embodiment or the like, the central axes Ax ₁₀ , Ax ₁₂ , Ax of the drum screens 10 and 30 and the screw type dehydrators 30 and 32 are viewed in a plan view from the vertical direction. _{Although a} configuration in which ₃₀ and Ax ₃₂ overlap each other is adopted, the present invention does not necessarily have a configuration in which the central axes Ax ₁₀ , Ax ₁₂ , Ax ₃₀ , and Ax ₃₂ completely overlap each other. This makes it possible to increase the degree of freedom in design.

Further, in the first embodiment and the like, the drive chains 18 and 19 are adopted for power transmission from the drive motor 17, but the present invention is not limited thereto. For example, power transmission using a belt or power transmission by meshing gears can be used.

Further, in the first embodiment and the like, the drum screens 10 and 30 and the screw type dehydrators 12 and 32 are driven by a single drive motor 17, but the present invention is limited to this. is not. For example, a drive motor for driving the drum screen and a drive motor for driving the screw type dehydrator may be separately provided. As a result, the rotation speed of the drum screen and the rotation speed of the screw type dehydrator can be controlled individually, and detailed drive control can be performed according to the type of sewage introduced and the residue contained therein. It can be carried out.

Further, the drive source for driving the drum screen and the screw type dehydrator is not limited to the electric motor, and an air or hydraulic rotary actuator, an internal combustion engine such as a diesel engine, or the like can be adopted.

Further, in the present invention, a photocatalytic function can be imparted to a portion of the solid-liquid separation device that comes into contact with sewage and sewage residue. As an example of imparting the photocatalytic function, for example, it can be realized by baking titanium oxide on the surface of the object or a titanium oxide containing sodium silicate or aluminum oxide.

1 Solid-liquid separator 10, 30 Drum screen 10c 1st end 10d 2nd end 11 Sewage introduction pipe 12, 32 Screw type dehydrator 14 Transmission mechanism 15 Recipient 16 Waste liquid pan 17 Drive motor 23, 24 Cleaning nozzle 101 End plate 120, 320 Screw shaft 121.321,421 Cylindrical guide plate 121a, 321a Inlet 121b, 321b Discharge port 122,322,422,522 Screw blade 140,220 Drive wheel 304 Impeller 304a Blade 500 Scrap 525 Scraper Ax ₁₀ , Ax ₃₀ Central axis B ₁ , D ₁ Secondary separation part (upstream part of axis)
B ₂ , D ₂ dehydration part (downstream part of shaft)

Claims (8)

A solid-liquid separation device that separates sewage into solid and liquid and collects the residue.
It has a bottomed cylinder shape in which the first end is opened and the second end is closed by an end plate, and the first end is rotationally driven around the central axis in a state of being inclined so as to face diagonally downward. Drum screen and
A sewage introduction pipe that is inserted into the drum screen from the first end portion that is opened and discharges the sewage toward the end plate.
A screw type dehydrator that is arranged below the drum screen and dehydrates the residue while receiving the residue of the sewage that flows down from the first end along the inner peripheral surface of the drum screen.
A waste liquid pan that is arranged below the screw type dehydrator and discharges while receiving the water filtered by the screw type dehydrator and the drum screen.
An impeller attached to the end plate and converting the pressure of sewage discharged from the sewage introduction pipe into the rotational driving force of the drum screen.
Equipped with a,
The screw type dehydrator extends along the central axis of the drum screen from the outside of the first end portion to the outside of the second end portion in a plan view from the vertical direction, and the residue is discharged from the first end portion. A screw shaft that conveys from the portion toward the second end portion and a porous tubular guide plate that covers the outer periphery thereof are provided.
The tubular guide plate has a receiving port for receiving the sewage flowing down from the first end portion of the drum screen, and the residue conveyed by the screw shaft outside the second end portion of the drum screen. With a discharge port that discharges to the outside at the position of
The screw shaft has the same diameter of the screw blade in the shaft upstream portion on the receiving port side of the tubular guide plate, and the shaft downstream portion on the discharge port side of the tubular guide plate with respect to the shaft upstream portion. In, the diameter of the screw blade gradually decreases from the upstream side of the shaft toward the outlet side.
The inner diameter of the tubular guide plate is a diameter corresponding to the diameter size of the screw blade in the first region corresponding to the shaft upstream portion of the screw shaft, and corresponds to the shaft downstream portion of the screw shaft. In the second region, the diameter of the screw blade gradually decreases from the upstream side of the shaft toward the discharge port side.
The screw shaft has two screw blades in the upstream portion of the shaft.
In the tubular guide plate, when the end on the upstream side of the shaft is the upstream end and the end on the downstream side of the shaft is the downstream end.
The receiving port is provided in the first region only from the upstream end portion to the upstream end portion side of the boundary portion between the first region and the second region.
When the drum screen and the sewage introduction pipe are viewed from the front from the tubular axis direction of the drum screen, the outlet of the sewage introduction pipe is above the tubular axis of the drum screen and It is offset in one of the left and right directions,
Solid-liquid separator. In the solid-liquid separation device according to claim 1,
A solid-liquid separator in which the inclination angle of the central axis of the drum screen is 5 ° to 40 ° with respect to a horizontal plane. In the solid-liquid separator according to claim 1 or 2 .
The pitch of the screw blades in the screw shaft is the same in the shaft upstream portion, and gradually narrows from the shaft upstream portion side to the discharge port side in the shaft downstream portion.
Solid-liquid separator. In the solid-liquid separation device according to any one of claims 1 to 3 .
A solid-liquid separator having a gap in the range of 0.3 mm to 0.5 mm between the outer peripheral end of the screw blade and the inner peripheral surface of the tubular guide plate. In the solid-liquid separation device according to any one of claims 1 to 4 .
A solid-liquid separator in which the aperture ratio of the tubular guide plate is smaller in the region corresponding to the shaft downstream portion of the screw shaft than in the region corresponding to the shaft upstream portion of the screw shaft. In the solid-liquid separation device according to any one of claims 1 to 5 .
A saucer for guiding the water filtered by the drum screen to the waste liquid pan is arranged below the drum screen and above the shaft downstream portion of the screw type dehydrator.
The saucer is tilted along the drum screen.
Solid-liquid separator. In the solid-liquid separation device according to any one of claims 1 to 6 .
It includes a single drive motor and a transmission mechanism that transmits the rotational driving force of the drive motor to the drum screen and the screw shaft.
Solid-liquid separator. In the solid-liquid separation device according to any one of claims 1 to 7 .
A solid-liquid separator in which a portion of the sewage introduction pipe inserted into the drum screen is inclined along the central axis of the drum screen.

Images