JPH0570481B2 - - Google Patents

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 and solids such as sand. The present invention relates to a solid-liquid separator that processes water to be treated containing organic matter and separates the treated water from suspended matter, organic matter, sand, and other solids, and a secondary flow forcing device for the same.

[Prior Art] Generally, 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, a screen, etc. are conventionally 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 for this purpose is complicated and expensive. There were flaws. Also, with the removal method using a screen, if you try to remove even minute floating particles,
Since the mesh had to be made thinner, the screen had the disadvantage that it was more likely to become clogged.
In addition, the sedimentation tank method has disadvantages in 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 mechanism for removing the sediment is complicated and expensive. Ta.

The present invention was 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 levitating them by making good use of hydraulic characteristics. 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 its hydraulic properties to settle them. The present invention aims to provide a solid-liquid separation device and a secondary flow forcing device for the same.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an outer wall of a moderation tank consisting of a circular or involume-shaped outer wall and a bottom plate having a solid matter reservoir in the center. In addition to providing an inlet for treated water and an outlet for treated water, a vertically rotating cylindrical secondary flow forced rotating body made of a material that generates electromagnetic waves is provided in the center of the deceleration tank. , a solid-liquid separation device is constructed by providing a cylinder for discharging solids whose lower end faces the solids reservoir in the center of the secondary flow forcing rotor, integrally with the secondary flow forcing rotor. That's what I do.

In addition, in order to promote the separation and flotation of organic matter,
In order to use materials that generate electromagnetic waves in part or all of the secondary flow forced rotating body, or to increase the deodorizing effect,
A deodorizing material may be incorporated into the secondary flow forced 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 moderation layer through the inlet is decelerated in the moderation tank, and the water contained in the water to be treated is decelerated. Solids such as sand will settle and be 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. In addition, solid matter such as sand and suspended matter are removed from the water being treated.
The treated water after organic substances and the like have been removed will be discharged from the outlet. In addition, in the center of the moderation tank, the solid and liquid in the moderation tank is The vertical secondary flow, which is effective for separation, becomes stronger and solids such as sand, suspended matter,
Separation of organic matter etc. will be 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. becomes.

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 matter that tends to collect in the center of the deceleration tank, and the organic matter will be destroyed by the electromagnetic waves. Separation and flotation of these objects 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.

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 the pump or spiral vanes built into the solids discharge cylinder, and the solids are pumped up. is received by a receiving gutter provided on the outer periphery of the upper end of the solid material discharge cylinder, and is sequentially guided to a solid material 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 separator and a secondary flow forcing device for the same, showing one embodiment of the present invention, and FIGS. 2 and 3 are plan views showing different arrangements of the solid-liquid separator. It is a diagram.

In the figure, 1 is a deceleration tank, which is composed of a circular or involute outer wall 2 and a bottom plate 3.

Note that FIGS. 4A, B, and C are cross-sectional views of deceleration tanks 1 having different shapes, and a solid matter reservoir 4 is provided in the center of the bottom plate 3 of the deceleration tank 1. Figure 4A shows the standard cross-sectional shape with the bottom plate 3 horizontal, Figure 4B shows the bottom plate 3 with the center down, and Figure 4C shows the bottom corner with the center up. When deciding which shape to adopt, the optimum 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., and in some cases, other shapes may be selected. You may adopt the shape. Further, the shape of the side wall 2 can be deformed as necessary, such as by reducing the diameter of a part of the side wall 2, as shown in FIG. 4B, and can be designed to optimize the flow condition within the deceleration tank 1. 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, 5 is an inlet for the water to be treated W' provided on the outer wall of the deceleration tank 1, and 6 is an outlet for the treated water W.

In addition, the arrangement of the inlet 5 and the outlet 6 is as shown in FIG.
The outflow port 6 of the treated water W is the primary flow S ₁ in the deceleration tank 1
They may be arranged in three orthogonal positions along the same line, or they may be arranged in four orthogonal positions as shown in FIG. However, care should be taken to arrange the outlet 6 at a somewhat higher position than the inlet 5 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. Reference numeral 8 denotes a flow shielding plate that dams up floating matter floating on the liquid surface and directs it toward the retention chamber, and is provided with comb-shaped slits, etc., and is arranged in the radial direction at the liquid level of the deceleration tank 1. 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. At the center thereof, there is a cylinder 10 for discharging solids whose lower end faces the solids reservoir 4. is provided integrally with the secondary flow forcing rotating 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 reservoir 4 and opens the opening at the lower end of the cylinder 10 for discharging solids. It is designed to lead to

15 is a receiving gutter that receives solids discharged from the upper end of the solids discharge cylinder 10;
A guide plate 16, which is provided in a donut shape on the outer periphery of the upper end and has a plate-covered shape, is provided at the upper end of the solid matter discharge cylinder 10 to guide the solid matter discharged therefrom to the receiving gutter 15. is provided.

17 is a solid matter receiving chamber provided with the deceleration tank 1 outside, and the receiving gutter 15 and the solid matter receiving chamber 17 are connected to the guide gutter 18.
connected via.

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 reservoir 4 is built into the solids discharge cylinder 10 shown in FIG. The embodiment shown in FIG. 1 shows an example in which a pump 20 for pumping up solid matter is built into the lower part of the solid matter discharge cylinder 10 instead of the spiral vane 19.

However, the secondary flow control rotating body 9 is formed in an inverted trapezoidal cylindrical shape as shown in _FIG . You can also do this.

Note that FIG. 7 is a sectional view of the secondary flow forced rotation body 9. As shown in FIG. 7, the secondary flow forced rotating body 9
By providing recesses a, protrusions b and c, through holes d, etc. on the inner and outer circumferential surfaces of the inner and outer circumferential surfaces, the generation of the secondary flow _S2 can be further promoted. In addition, the solid matter discharge cylinder 10
When used also as the secondary flow forced rotating body 9,
It is not possible to provide a through hole d or a convex portion c on the inner peripheral surface.

However, the convex portion b which is a part of the secondary flow forced rotating body 9
A material that generates electromagnetic waves, such as ceramics or magnets, may be used for the entire structure 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. 2, it is necessary to add It is desirable to mix the mixture uniformly.

In the solid-liquid separator of this embodiment having the above-described configuration, the water to be treated W' supplied into the deceleration tank 1 from the inlet 5 is decelerated while circulating inside the deceleration tank 1,
Solids such as sand contained in the water to be treated W′ are
It will settle and be deposited on the bottom plate 3.

On the other hand, floating matter, organic matter, 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.

In addition, solid matter such as sand and suspended matter,
The treated water W from which organic matter has been removed flows through the outlet 6.
It will be discharged through.

At this time, at the center of the moderation layer 1, the secondary flow forcing rotating body 9 is rotated around the vertical axis, so that the primary flow S1 of the water to be treated W' guided into the moderation layer ₁ is On the other hand, the secondary flow S ₂ 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, solid matter such as sand that has settled and accumulated on the bottom plate 3 is collected in the solid matter reservoir 4 at the center of the bottom plate 3 by the generated secondary flow _S2 , and is collected in the solid matter reservoir 4 at the center of the bottom plate 3, and is collected in the solid matter reservoir 4 at the center of the solid matter discharge cylinder 10. The water is successively pumped up by the internal spiral blade 19 or pump 20. Moreover, the solid matter such as sand that has been pumped up in this way is discharged from the upper end of the solid matter discharge cylinder 10,
After being guided to the receiving trough 15 via the guide plate 16, the solids are guided to the solids receiving chamber 17 via the guide trough 18 and separated.

[Effects of the Invention] As specifically explained above, according to the solid-liquid separator of the present invention, solids such as sand contained in the water to be treated are sedimented by making good use of hydraulic characteristics. In addition, 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 can be removed efficiently. It can promote the separation of suspended matter, organic matter, etc., and solid matter such as sand accumulated in the solid matter reservoir can be removed.
Since the solid matter can be discharged through the solid matter discharge cylinder provided integrally with the secondary flow forcing rotary body, the structure is simple, it can be manufactured at low cost, and it is easy to handle.

Furthermore, by using a material that generates electromagnetic waves for part or all of the secondary flow forced rotating body, it is possible to further promote the separation of organic substances and the like.

Further, by incorporating a deodorizing material into the secondary flow forced rotating body, odors such as organic substances can be effectively deodorized.

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 rotating body, so that the secondary flow for the solid-liquid separation device is Not only is it possible to design the flow forcing device more compactly, but especially when a spiral blade is built in,
By rotating the secondary flow forcing rotating body, the solids accumulated in the solids reservoir can be automatically pumped up. Further, the solid separator of the present invention has the secondary flow forcing device as described above, and the upper end of the solid 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. It is possible to omit the foundation work for the solids discharge channel. 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. It is possible to provide

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a solid-liquid separator and a secondary flow forcing device for the same, showing one embodiment of the present invention, and FIGS. 2 and 3 are plan views showing different arrangements of the solid-liquid separator. Figures 4A, B, and C are cross-sectional views of moderation tanks with different shapes, and Figures 5 and 6 are
FIG. 7 is a sectional view showing the different internal structures of the secondary flow forcing device of the present invention, and FIG. 7 is a sectional view of the secondary flow forcing rotating body. 1... Speed reduction tank, 2... Outer wall, 3... Bottom plate, 4...
...Solid matter reservoir, 5...Inflow port, 6...Outflow port, 7
... Retention chamber, 8 ... Current shielding plate, 9 ... Secondary flow forced rotating body, 10 ... Cylinder for discharging solids, 11 ... Flexible joint, 12 ... Drive source, 13 ... Hollow Part, 14
...Scraping board, 15...Gutter, 16...Information board, 1
7... Solids receiving chamber, 18... Guide trough, 19... Spiral vane, 20... Pump, 21... Additive, a... Concave portion, b, c... Convex portion, d... Through hole,
W'...Water to be treated, W...Water to be treated, _S1 ...Primary flow, _S2 ...Secondary flow.

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 involume outer wall and a bottom plate having a solid matter reservoir in the center. At the same time, a vertically rotating cylindrical secondary flow forced rotating body made of a material that generates electromagnetic waves is provided in the center of the deceleration tank, and at the center of the secondary flow forced rotating body, A solid-liquid separator characterized in that a cylinder for discharging solids whose lower end faces a solids reservoir is provided integrally with a secondary flow forcing rotating body. 2 An inlet for treated water and an outlet for treated water are provided on the outer wall of the moderation tank, which consists of a circular or involume-shaped outer wall and a bottom plate with a solid matter reservoir in the center, and the center of the moderation tank is The section is equipped with a cylindrical secondary flow forced rotation body containing a vertically rotating deodorizing material, and a solid matter discharge cylinder whose lower end faces the solid matter reservoir is installed in the center of the secondary flow forced rotation body. A solid-liquid separator characterized in that it is integrated with a secondary flow forced rotating body. 3 An inlet for treated water and an outlet for treated water are provided on the outer wall of the moderation tank, which consists of a circular or involume-shaped outer wall and a bottom plate with a solid matter reservoir in the center, and the center of the moderation tank is The section is equipped with a vertically rotating cylindrical secondary flow forced rotating body, and a solid matter discharge system is installed in the center of the secondary flow forced rotary body, with a built-in pump at the lower end for handling solid matter. A secondary flow forcing device for a solid-liquid separator, characterized in that a cylinder faces a solid matter reservoir and is provided integrally with a secondary flow forcing rotating body. 4. A solid-liquid separator according to claim 3, characterized in that a spiral vane for lifting up solids is built into the cylinder for discharging solids instead of the pump. 5 An inlet for treated water and an outlet for treated water are provided on the outer wall of the moderation tank, which consists of a circular or involume-shaped outer wall and a bottom plate with a solids reservoir in the center, and the central part of the moderation tank is A vertically rotating cylindrical secondary flow forced rotating body is provided, and a cylinder for discharging solids with its lower end facing the solids reservoir is placed in the center of the secondary flow forced rotating body. A receiving gutter is provided on the outer periphery of the upper end of the solid matter discharging cylinder to receive the solids discharged from the upper end of the solid matter discharging cylinder, and a solid matter receiving chamber is provided on the outside of the deceleration tank, A secondary flow forcing device for a solid-liquid separator, characterized in that a receiving gutter and a solids receiving chamber are connected by a guide gutter.