JPH01215316A - Solid-liquid separation device and its secondary flow forcing unit - Google Patents

Abstract

PURPOSE:To efficiently separate suspended matters, sand, etc., by floating up the suspended matters and organic substances in the water to be treated to separate them in a retaining chamber, etc., by utilizing the hydraulic properties, and settling down solids such as sand in the water to be treated by utilizing the hydraulic properties. CONSTITUTION:An inlet port 5 introducing the water to be treated and an outlet port 6 discharging the treated water are provided on the outer wall 2 of a retardation vessel 1 consisting of the outer wall 2 of circular or involute shape and a bottom plate 3 having a solid reservoir 4 in its center part. A retaining chamber 7 opened at the liquid surface position in the retardation vessel to introduce the suspended matters, etc., in the liquid surface is disposed outside of the retardation vessel 1. Moreover, a cylindrical secondary flow forcing revolution body 9 revolving around a vertical axis is provided on the center part of the ratardation vessel 1. A solid discharge tube 10 the lower end of which is reached to the solid reservoir 4 is integrally disposed with the resolution body 9 in the center part of the revolution body 9. As a result, the water to be treated such as service water, industrial water, etc., is efficiently treated at low cost to separate suspended matters, organic substances and solids such as sand from the treated water.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to clean water sourced from river surface water, industrial water, and wastewater in urban areas during rainfall, such as suspended solids, sand, etc. Related to solid-liquid separation equipment that processes treated water containing solid matter, organic matter, etc. and separates the treated water from suspended matter, organic matter, sand, and other solid matter, and a secondary flow forcing device for the same. It is.

[Prior Art] In general, in order to remove floating matter, solid matter such as sand, organic matter, etc. contained in water to be treated, a settling basin, a sedimentation basin,
Screens etc. are used.

[Problems to be solved by the invention] However, in the conventional sand settling basin method, the sand contains a lot of organic matter, making it difficult to lift and wash the sand, and the mechanical equipment required to do so is complicated and expensive. There were drawbacks. Furthermore, in the removal method using a screen, the mesh must be made thinner in order to remove even minute floating particles, which has the disadvantage that the screen is easily clogged.

In addition, the sedimentation tank method has the disadvantage that when the specific gravity of the removed material is relatively light, not only is it necessary to increase the area of the sedimentation tank, but the mechanical equipment for removing the sediment is complicated and expensive. Ta.

The present invention has been proposed in view of the above-mentioned conventional drawbacks, and it is possible to efficiently remove suspended matter and organic matter contained in the water to be treated by making use of the woody properties of the water. In addition, if the water to be treated contains solids such as sand, it is an inexpensive and easy-to-handle method that can effectively remove these solids by making use of the woody properties of the water. It is an object of the present invention to provide an easy solid-liquid separation device and a secondary flow forcing device for the same.

[Means for Solving the Problems 1] In order to solve the above-mentioned problems, the present invention provides a structure in which the water to be treated is attached to the outer wall of a moderation tank consisting of a circular or involute outer wall and a bottom plate having a solid matter reservoir in the center. In addition to providing an inlet and an outlet for the treated water, a retention chamber is provided outside the deceleration tank that opens at the liquid level in the deceleration tank and guides floating objects on the liquid surface,
A cylindrical secondary flow forced rotating body that rotates around a vertical axis is installed in the center of the deceleration tank, and a solids discharge cylinder whose lower end faces the solids reservoir is installed at the center of the secondary flow forced rotating body. is provided integrally with a secondary flow forced rotating body to constitute a solid-liquid separation device.

However, when the diameter of the cylindrical secondary flow forcing rotor is small, the cylinder for discharging circular objects can also be used as the cylindrical secondary flow forcing rotor.

In the above solid-liquid separation device, in order to promote the generation of a secondary flow effective for solid-liquid separation, the secondary flow forced rotating body is formed into an inverted trapezoidal cylindrical shape, and the separation and flotation of organic matter is promoted. Therefore, a material that generates electromagnetic waves may be used in part or all of the secondary flow forced rotation body, or a deodorizing material may be incorporated in the secondary flow forced rotation body to increase the deodorizing effect. ,
It is desirable to arrange a flow shield plate in the radial direction at the liquid level of the deceleration tank to block floating objects, etc. floating on the liquid surface and direct them to the retention chamber. Further, it is preferable that the outlet of the treated water is arranged at a trigonal or quadrature angle with respect to the inlet of the water to be treated, along the primary water flow in the deceleration tank.

Note that if the upper end of the secondary flow forced rotation body installed in the center of the deceleration tank is connected to the drive source via a flexible joint, the bearing at the lower end of the secondary flow forced rotation body can be omitted. It can be widely used as a secondary flow forcing device for solid-liquid separation. At this time, the load acting on the flexible joint is reduced,
In order to generate a stable secondary flow, a hollow portion may be formed in the upper outer periphery of the secondary flow forcing rotating body.

Further, the pump or spiral vane for pumping up the solids can be built into a solids discharge cylinder integrally provided in the center of the secondary flow forcing rotating body of the secondary flow forcing device, In the solid-liquid separator having the secondary flow forcing device, a receiving gutter for receiving the pumped solids is provided on the outer periphery of the upper end of the cylinder for discharging solids, and a receiving gutter and a receiving gutter are provided on the outside of the deceleration tank. If the solid matter receiving chamber is connected with a guide trough, the solid matter that has been pumped up can be easily removed.

[Function] Since the solid-liquid separator of the present invention is configured as described above, the water to be treated that is supplied into the deceleration tank through the inlet is
The speed is decelerated in the deceleration tank, and solid matter such as sand contained in the water to be treated settles and is deposited on the bottom plate. On the other hand, floating matter, organic matter, etc. contained in the water to be treated float on the liquid surface and are led to the retention chamber, where they are collected and separated.

Further, the treated water after solid matter such as sand, floating matter, organic matter, etc. have been removed from the water to be treated is discharged from the outlet. In addition, in the center of the moderation tank, solid-liquid separation in the moderation tank is carried out by the rotation of a cylindrical secondary flow forced rotation body or a cylindrical secondary flow forced rotation body that also serves as a cylinder for discharging solids. The effective vertical secondary flow becomes stronger, and the separation of solid matter such as sand, suspended matter, organic matter, etc. is promoted. In addition, the solids deposited on the bottom plate are collected in the solids reservoir in the center by the secondary flow, and can be pumped up through the solids discharge cylinder provided at the center of the secondary flow forced rotating body. .

At this time, if the secondary flow forcing rotating body is formed into an inverted trapezoidal cylindrical shape, the generated secondary flow will be maintained stably and strengthened, thereby further promoting solid-liquid separation. .

In addition, if a material that generates electromagnetic waves is used in part or all of the secondary flow forced rotating body, the electromagnetic waves will be intensively irradiated to organic substances, etc. that tend to collect in the center of the deceleration tank, and the electromagnetic waves will cause the organic substances, etc. Separation and flotation will be promoted.

Furthermore, if a deodorizing material is installed in the secondary flow forcing rotating body, the odor of organic parts etc. that has gathered in the center of the deceleration tank will be deodorized.

Furthermore, if a flow shield plate is provided in the radial direction at the liquid level of the deceleration tank, floating objects floating on the liquid surface will be blocked by the flow shield plate and guided to the retention chamber.

In addition, if the outlet is placed at a trigonal or diagonal angle to the inlet along the primary flow in the deceleration tank, the flow distance from the inlet to the outlet will be large, which will reduce the risk of damage. The treated water is discharged from the outlet as clean treated water after solids, suspended matter, organic matter, etc. contained therein are sufficiently removed.

Further, since the secondary flow forcing device for solid-liquid separation of the present invention is configured as described above, the secondary flow forcing rotating body slightly vibrates due to the influence of complicated flows during rotation. If the bearing at the lower end of the secondary flow forced rotation body is omitted, not only will the bearing not fail due to vibration, but the vibrations acting on the upper end of the secondary flow forced rotation body will be tolerated by the flexible joint. Therefore, the secondary flow forcing rotating body is rotated smoothly. At this time, if a hollow part is formed in the upper outer periphery of the secondary flow forced rotation body, the load acting on the flexible joint will be reduced, and the posture of the secondary flow forced rotation body will be stabilized. A stable secondary flow will be generated.

In addition, the solids deposited on the bottom plate of the deceleration tank and stored in the solids reservoir in the center are pumped up by a pump or spiral vanes built into the solids discharge cylinder, and the pumped solids are The solid i is received by a receiving gutter provided on the outer periphery of the upper end of the solid i discharge cylinder, and is sequentially guided to the solid receiving chamber provided outside the deceleration tank via the guide gutter.

[Example] Hereinafter, the present invention will be specifically described based on an example shown in the drawings.

FIG. 1 is a sectional view of a solid-liquid separation device and a secondary flow forcing device for the same, showing an embodiment of the present invention, and FIGS. 2 and 3 are
It is a top view which shows the different arrangement|positioning of the solid-liquid separator.

In the figure, 1 is a deceleration tank, which is composed of a circular or involute outer wall 2 and a bottom Fi3.

Note that FIGS. 4A, B, and C are cross-sectional views of deceleration tanks 1 having different shapes, and a solid source 4 is provided in the center of the bottom plate 3 of the deceleration tank 1. Fig. 4A shows a standard cross-sectional shape in which the bottom plate 3 is horizontal, and Fig. 4B shows the bottom plate 3 in a downward-centered form.
Also, Figure 4C shows a center-up shape with the bottom corner eliminated,
When deciding which type of shape to adopt, the most suitable shape is considered, taking into account the properties of the solids deposited on the bottom plate 3, the flow conditions in the deceleration tank 1, etc. Alternatively, the shape of the side wall 2 may be modified as necessary, such as by partially reducing the diameter, as shown in FIG. It can be designed to be optimal. However, the embodiment shown in FIG. 1 shows a case where the bottom plate 3 having the standard cross-sectional shape shown in FIG. 4A is used, and this will be described below.

In the figure, numeral 5 is provided on the outer wall of the deceleration tank l. 6 is an inlet for the water to be treated W', and an outlet for the treated water W.

Note that the inlet 5 and outlet 6 are arranged relative to the inlet 5 of the water to be treated W', as shown in FIG.

The outflow ports 6 of the treated water W may be arranged at three orthogonal positions along the primary flow Sl in the deceleration tank 1, or may be arranged at four orthogonal positions as shown in FIG. . However, inlet 5
On the other hand, the outflow port 6 is arranged at a certain high position so that the inflow and outflow flows do not interfere with each other.

Next, reference numeral 7 denotes a retention chamber provided on the outside of the deceleration tank 1, which opens at the level of the liquid level in the deceleration tank 1, and is designed to guide floating objects and the like floating on the liquid surface. 8 is a flow shielding plate that dams up floating matter floating on the liquid surface and directs it toward the retention chamber. It is provided with comb-shaped slits, etc., and is arranged in the radial direction at the liquid level of the deceleration tank l. has been done.

Reference numeral 9 denotes a cylindrical secondary flow forced rotating body that rotates around a vertical axis and is provided at the center of the deceleration tank 1, and in the center thereof is a cylinder for discharging solids whose lower end faces the solids source 4. 10 is provided integrally with the E-order flow forcing rotary body 9. However, when the diameter of the secondary flow forcing rotor 9 is small, the solid matter discharge cylinder 10 can also be used as the cylindrical secondary flow forcing rotor.

11 is a flexible joint such as a universal joint, and the upper end of the secondary flow forced rotation body 9 is connected to the motor of the drive source 12 via this flexible joint 11, and the secondary flow forced rotation body The bearing at the lower end of 9 is omitted to constitute a secondary flow forcing device.

Reference numeral 13 denotes a hollow portion provided on the upper outer periphery of the secondary flow forcing rotating body 9. Further, reference numeral 14 denotes a scraping plate provided on the outer periphery of the lower end of the cylinder 10 for discharging solids, which scrapes the solids accumulated in the corners of the solids source 4 and opens the opening at the lower end of the cylinder 10 for discharging solids. It is designed to lead you to the department.

Reference numeral 15 denotes a receiving gutter for receiving solids discharged from the upper end of the solid matter discharging cylinder 10, and is provided in a donut shape on the outer periphery of the upper end of the solid matter discharging cylinder 10. A guide plate 16 resembling a covered plate is provided in the section to guide the solid matter discharged therefrom to the receiving gutter 15.

Reference numeral 17 denotes a solid matter receiving chamber provided outside the deceleration tank l, and the receiving gutter 15 and the solid matter receiving chamber 17 are connected via a guide gutter 18.

Note that FIGS. 5 and 6 are cross-sectional views showing different internal structures of the secondary flow forcing device.

The embodiment shown in FIG. 5 shows an example in which a spiral blade 19 for pumping up the solids accumulated in the solids source 4 is built into the solids discharge cylinder 10 shown in FIG. The embodiment shown in the figure shows an example in which a pump 20 for pumping up solid matter is built into the lower part of the cylinder 10 for discharging solid matter, instead of the spiral vane 19.

However, the secondary flow forcing rotating body 9 is formed in an inverted trapezoidal cylindrical shape as shown in FIG. 6 to further promote the generation of the secondary flow S2 effective for solid-liquid separation in the deceleration tank 1. You can.

Note that FIG. 7 is a cross-sectional view of the secondary flow forced rotation body 9. As shown in FIG. 7, on the inner and outer peripheral surfaces of the secondary flow forced rotating body 9,
By providing recesses a, protrusions S, c, through holes d, etc., the generation of the secondary flow S2 can be further promoted. In addition,
When the solid matter discharge cylinder 10 is used also as the secondary flow forcing rotating body 9, the through hole d and the convex portion C on the inner circumferential surface cannot be provided.

However, a material that generates electromagnetic waves, such as a ceramic or a magnet, may be used for all of the convex portions that are a part of the secondary flow forcing rotating body 9 to promote flotation and separation of organic substances.

Further, the secondary flow forcing rotating body 9 may be provided with a deodorizing material such as a humic material to eliminate odors such as organic substances.

In addition, in order to further improve the solid-liquid separation efficiency, when supplying an additive 21 that has strong floating properties and adsorption properties for organic substances, etc., as shown in FIG.
It is preferable to feed the mixture into the container and mix it uniformly.

In the solid-liquid separator of this example having the above configuration,
The water to be treated W' supplied into the deceleration tank l from the inlet 5 is
The water is decelerated while circulating in the deceleration tank 1, and solids such as sand contained in the water to be treated W' settle down and are deposited on the bottom plate 3.

On the other hand, floating substances, organic substances, etc. contained in the water to be treated W' float on the liquid surface and are led to the retention chamber 7 by the flow shield plate 8 and separated therefrom.

Further, the treated water W after solids such as sand, suspended matter, organic matter, etc. have been removed from the treated water W' is discharged through the outlet 6.

At this time, at the center of the deceleration tank 1, the secondary flow forced rotor 9 is rotated around the vertical axis, so that the primary flow S of the water to be treated W' led into the deceleration tank 1 is On the other hand, the secondary flow S2 generated in the vertical direction becomes stronger, and the separation of solid matter such as sand, suspended matter, organic matter, etc. contained in the water to be treated W' is promoted.

In addition, solids such as sand that have settled and accumulated on the bottom plate 3 are collected in the solids source 4 at the center of the bottom plate 3 by the generated secondary flow S2, and are discharged inside the solids discharge cylinder 10. The water is pumped up sequentially by the built-in spiral vane 19 or pump 20. In addition, the solids such as sand that have been pumped up in this way are discharged from the upper end of the solids discharge cylinder 10, guided to the receiving gutter 15 via the guide plate 16, and then transferred to the solids receiving chamber via the guide gutter 18. 17 and will be separated by 1.

[Effects of the Invention] As specifically explained above, according to the solid-liquid separator of the present invention, floating matter, organic matter, etc. contained in the water to be treated are brought to the surface by making good use of the woody properties. By sequentially introducing these to a retention chamber and separating them, it is possible to remove them efficiently, and solids such as sand contained in the water to be treated can be sedimented by making good use of the woody properties. Furthermore, the rotation of the secondary flow forcing rotating body installed in the center of the deceleration tank strengthens the secondary flow that is effective for solid-liquid separation, and solids such as sand, etc. Separation of suspended matter, organic matter, etc. can be promoted, and solid matter such as sand accumulated in the solid matter source can be discharged through a solid matter discharge cylinder provided integrally with the secondary flow forced rotating body. Therefore, it has a simple structure, can be manufactured at low cost, and is easy to handle.

In addition, when the diameter of the cylindrical secondary flow forced rotating body is small,
By using the secondary flow forcing rotor and the cylinder for discharging solids, the structure can be made simpler and manufactured at a lower cost.

' Furthermore, by forming the secondary flow forcing rotating body into an inverted trapezoidal cylindrical shape, generation of a secondary flow effective for solid-liquid separation can be further promoted.

Furthermore, by using a material that generates electromagnetic waves for part or all of the secondary flow forced rotating body, separation of organic substances and the like can be further promoted.

Further, by incorporating a deodorizing material in the secondary flow forced rotating body, odors such as organic substances can be effectively deodorized. Furthermore, by radially arranging the flow shield plate at the liquid level of the deceleration tank, floating matter floating on the liquid surface can be dammed up and efficiently guided to the retention chamber.

In addition, by arranging the outlet to the inlet at three or four right angles along the flow, the flow distance from the inlet to the outlet becomes longer, and during that time, the flow distance from the inlet to the outlet becomes longer. Since solid matter, suspended matter, organic matter, etc. that were present in the system are sufficiently removed, only clean treated water can be discharged from the outlet.

In addition, in the secondary flow forcing device for a solid-liquid separator of the present invention, the secondary flow forcing rotating body vibrates slightly under the influence of complicated flows during rotation; By connecting the upper end to the drive source via a flexible joint, vibrations can be absorbed and the bearing at the lower end of the secondary flow forced rotating body can be omitted, thereby reducing the use of bearings that are prone to failure due to vibration. The rotation of the secondary flow forced rotating body is also smooth, and it can be widely applied to various solid-liquid separation devices that require secondary flow, allowing stable operation for a long period of time, and requiring maintenance and inspection. etc. becomes easy.

In addition, if a hollow part is formed in the upper outer periphery of the secondary flow forced rotation body, the load acting on the flexible joint will be reduced, and the posture of the secondary flow forced rotation body will be stabilized, making it more stable. Therefore, it is possible to provide a secondary flow forcing device capable of generating a secondary flow.

In addition, the pump and spiral vanes for pumping up solids are built into the solids discharge cylinder that is integrally provided in the center of the secondary flow forcing rotary body. Not only is it possible to design the flow forcing device more compactly, but especially when a spiral blade is built in, the rotation of the secondary flow forcing rotating body automatically removes the solids accumulated in the solids reservoir. can be pumped up. Moreover, the solid-liquid separator of the present invention has the secondary flow forcing device as described above, and the upper end of the solid matter discharge cylinder is Since the solids discharged from the cylinder are received and guided to the solids receiving chamber through the guide gutter, the solids discharged from the upper end of the solids discharge cylinder can be separated and removed using an extremely simple mechanism. This makes it possible to omit foundation work for solids discharge channels. A solid-liquid separation device and a secondary flow forcing device for the same, which have the following advantages and are extremely effective in practice in removing solid matter such as sand, floating matter, organic matter, etc. contained in water to be treated. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a solid-liquid separation device and a secondary flow forcing device for the same, showing one embodiment of the present invention, and FIGS. 2 and 3 are
A plan view showing different arrangements of the solid-liquid separator, FIG. 4A
, B, and C are cross-sectional views of moderator tanks with different shapes, FIGS. 5 and 6 are cross-sectional views showing different internal structures of the secondary flow forcing device of the present invention, and FIG. 7 is a cross-sectional view of a secondary flow forcing device of the present invention. FIG. 3 is a cross-sectional view of a forced rotating body. DESCRIPTION OF SYMBOLS 1... Reduction tank, 2... Outer wall, 3... Bottom plate, 4... Solid matter reservoir, 5... Inlet, 6... Outlet, 7... Retention chamber,
8... Current shielding plate, 9... Secondary flow forced rotating body, 10... Solid matter discharge cylinder, 11... Flexible joint, 12... One driving source, 13
... hollow part, 14 ... scraping board, 15 ...
- Receiving gutter, 16... Guide plate, 17... Solid matter receiving chamber, 18... Guide gutter, 19... Spiral blade, 20... Pump 21... Additive, a... Concave portion, b, c...Convex portion, d...Through hole, W'...Water to be treated, W...Treated water, SI
...-Next flow, S2...Secondary flow. Figure 4

Claims (1)

[Claims] 1) An inlet for water to be treated and an outlet for treated water are provided on the outer wall of a moderation tank consisting of a circular or involute outer wall and a bottom plate having a solid matter reservoir in the center. At the same time, a retention chamber is provided on the outside of the deceleration tank that opens at the liquid level in the deceleration tank and guides floating objects on the liquid surface. A secondary flow forcing rotating body having a shape of Characteristic solid-liquid separation equipment. 2) The solid-liquid separator according to claim 1, wherein the solid matter discharge cylinder is also used as a cylindrical secondary flow forced rotation body. 3) The solid-liquid separator according to claim 1 or 2, wherein the secondary flow forcing rotating body is formed in an inverted trapezoidal cylindrical shape. 4) The solid-liquid separator according to claim 1 or 2, wherein a material that generates electromagnetic waves is used for part or all of the secondary flow forced rotating body. 5) The solid-liquid separator according to claim 1 or 2, characterized in that the secondary flow forced rotating body is provided with a deodorizing material. 6) The first or second method is characterized in that a flow shield plate is arranged in the radial direction at the liquid level of the deceleration tank to block floating objects, etc. floating on the liquid surface and direct them to the retention chamber. A solid-liquid separator according to claim 2. 7) The first or first method is characterized in that the outlet of the treated water is arranged at three or four right angles along the primary flow in the deceleration tank with respect to the inlet of the water to be treated. A solid-liquid separator according to claim 2. 8) The upper end of the secondary flow forced rotation body installed in the center of the reduction tank is connected to the drive source via a flexible joint, and the bearing at the lower end of the secondary flow forced rotation body is omitted. A secondary flow forcing device for a solid-liquid separation device, characterized in that: 9) A secondary flow forcing device for a solid-liquid separator according to claim 8, characterized in that a hollow portion is formed in the upper outer periphery of the secondary flow forcing rotating body. 10) Claim 8, characterized in that a pump or spiral vane for pumping up solids is built into a cylinder for discharging solids that is integrally provided in the center of the secondary flow forcing rotating body. A secondary flow forcing device for the solid-liquid separation device described in Section 1. 11) A receiving gutter is provided on the outer periphery of the upper end of the solid material discharging cylinder to receive the solids discharged from the upper end of the solid material discharging cylinder, and a solid material receiving chamber is provided outside the deceleration tank, and the receiving gutter and No. 10, characterized in that the solid matter receiving chamber is connected with a guide trough.
A solid-liquid separation device having a secondary flow forcing device according to the claims.