JPH01215315A - Solid-liquid separation device - 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 in a dust collecting chamber, etc., by utilizing hydraulic properties, and settling down solids such as sand in the water to be treated by utilizing the hydraulic properties. CONSTITUTION:An inlet port 4 is provided on the side wall 2 of a retardation vessel 1 consisting of the side wall 2 of circular or square shape and a bottom plate 3. An outlet port 6 is disposed at the lower position of the side wall than that of the inlet port 4 or at the bottom plate. A retaining chamber 9 opened at the liquid surface position in the retardation vessel to introduce the suspended matters, etc., in the liquid surface, and the dust collecting chamber 10 connected with the retaining chamber 9 to recover and separate the suspended matters introduced to the retaining chamber are provided on the outside of the retardation vessel 1. As a result, the water to be treated containing suspended matters, solids such as sand, and organic substamces, as seen in service water the source of which is the surface flowing water in a river, in industrial water, or in sewage water during a rain fall, is efficiently treated at a 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 and solids such as sand. The present invention relates to a solid-liquid separator that processes water to be treated containing substances, organic substances, etc., and separates the treated water from solid substances such as floating substances, organic substances, and sand.

[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.

[Problem to be solved by the invention] However, in the conventional sand settling basin method, the sand contains a large amount of organic matter, making it difficult to lift and wash the sand, and the mechanical equipment for this purpose becomes complicated and expensive. There was a drawback.

Further, in the removal method using a screen, the screen has to 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 was proposed in view of the above-mentioned conventional drawbacks, and is capable of efficiently removing suspended matter and organic matter contained in water to be treated by making good use of the woody properties of the water. 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 good use of their woody properties. The purpose is to provide a solid-liquid separation device.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an inlet for supplying water to be treated on the side wall of a moderation tank consisting of a circular or square side wall and a bottom plate, and An outlet for discharging the treated water is provided on the side wall or bottom plate at a position lower than the inlet, and a stagnation outlet is provided outside the deceleration tank that opens at the liquid level in the deceleration tank to guide floating objects on the liquid surface. A solid-liquid separator is constructed by providing a flow chamber and a dust collection chamber that is connected to the flow chamber and collects and separates suspended matter introduced into the flow chamber.

In addition, the solid-liquid separator described above may be provided with a cylindrical or disc-shaped secondary flow forcing rotating body that rotates around a vertical axis in the center of the deceleration tank. The upper end of the flow forcing rotor can be connected to the drive source via a flexible joint, and the bearing at the lower end can be omitted.

[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 in the dust collection chamber. 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. At this time, if the secondary flow forcing rotating body is rotated, the secondary flow generated in the deceleration tank will become stronger, and the separation of solid matter such as sand, suspended matter, organic matter, etc. will be promoted.

In addition, the secondary flow forced rotating body vibrates slightly due to the influence of complex flows when rotating, but if the bearing at the lower end of the secondary flow forced rotating body is omitted, the bearing may fail due to vibration. Not only is there no vibration, but the vibration acting on the upper end of the secondary flow forcing rotor is tolerated by the flexible joint, so the secondary flow forcing rotor is rotated smoothly.

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

FIG. 1 is a plan view of a solid-liquid separator showing one embodiment of the present invention, and FIGS. 2, 3, and 4 are arrow views A-A and B-B shown in FIG. 1, respectively. FIG. 4 is a cross-sectional view taken along line C-C.

In the figure, 1 is a deceleration tank, which is composed of a circular side wall 2 and a bottom plate 3. Reference numeral 4 denotes an inlet provided on the side wall 2 of the deceleration tank l for supplying the water to be treated W', and is connected to the inlet pipe 5.

Reference numeral 6 denotes an outlet for discharging the treated water W, which is provided on the side wall 2 at a position lower than the inlet 4, and is connected to an outlet pipe 8 via an outlet passage 7.

Reference numeral 9 denotes a retention chamber installed outside 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 on the liquid surface. Reference numeral 10 denotes a dust collection chamber connected to the retention chamber 9. Inside the dust collection chamber 10, there is a rotating drum screen, a dust removal basket, etc., for collecting and separating floating matter introduced into the retention chamber 9. A recovery and separation device 11 is installed. Reference numeral 12 is a gate provided at the connection between the retention chamber 9 and the dust collection chamber 10. When this gate 12 is opened, floating objects etc. introduced into the retention chamber 9 are removed from the dust collection chamber IO. It is designed to be guided into the recovery and separation device 11.

Reference numeral 13 denotes a water collection chamber connected to the dust collection chamber 10. The dust collection chamber lO and the water collection chamber 13 are communicated through a communication port 14, and the treated water W separated by the recovery and separation device 11 is but,
Water is collected into a water collection chamber 13. Reference numeral 15 denotes an auxiliary pump that discharges the treated water W collected in the water collection chamber 13 into the outflow pipe 8 via the auxiliary pipe 16.

In the solid-liquid separator of this example having the above configuration,
The water to be treated W' supplied into the deceleration tank 1 from the inflow pipe 5 through the inlet 4 is decelerated while circulating in the deceleration tank l, and the sand etc. contained in the water to be treated W' is removed. The solids 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 9.

When the suspended matter and organic matter introduced into the retention chamber 9 have accumulated to a certain extent, the gate 12 is opened and the suspended matter and organic matter are guided into the collection and separation device ll installed in the dust collection chamber 10, and the suspended matter and organic matter are removed. Collect and separate. After completing the recovery and separation of floating matter, organic matter, etc., the gate 12 is closed again. At this time, the treated water W separated by the recovery and separation device 11 is gradually stored in the water collection chamber 13.

In addition, the treated water W after solids such as sand, suspended matter, organic matter, etc. have been removed from the treated water W′ is discharged from the outlet 6 via the outlet passage 7 and the outlet pipe 8. Become. Moreover, once a certain amount of treated water W is stored in the water collection chamber 13, the treated water W will drive the auxiliary pump 15, and will be discharged to the outflow pipe 8 via the auxiliary pipe 16, and the treated water W will be discharged into the outflow pipe 8 through the auxiliary pipe 16. It will be discharged together with W.

Next, FIG. 5 is a plan view of a solid-liquid separator showing another embodiment of the present invention.

In the embodiment shown in FIG. 1, the side wall 2 of the deceleration tank 1 is formed in a circular shape, but the side wall 2' of the deceleration tank 1' may be formed in a square shape as shown in this embodiment. .

Further, in the embodiment shown in FIG. 1, an outlet 6 for discharging treated water W is provided in the side wall 2 at a position lower than the inlet 4, but as shown in this embodiment, an outlet 6 is provided in the bottom plate 3'. An outlet 6' for discharging the treated water W may be provided.

Furthermore, in each of the embodiments shown in FIGS. 1 and 5, the additive 17, which has strong floating properties and strong adsorption properties for organic matter, is mixed uniformly into the water to be treated W' flowing in the inflow pipe 5. It goes without saying that if this is done, the solid-liquid separation performance will be further improved.

In FIG. 5, members corresponding to those shown in FIG. 1 are designated by the same reference numerals, and redundant explanation will be omitted.

Next, FIGS. 6 and 7 are sectional views of a moderating tank of a solid-liquid separator showing other embodiments of the present invention, respectively.

The embodiment shown in FIG. 6 shows an example in which a cylindrical quadratic forced rotation body 18 that rotates about a vertical axis is provided in the center of the deceleration tank 1, and the embodiment shown in FIG.

An example is shown in which a disk-shaped quadratic forced rotation body 18' that rotates around a vertical axis is provided in the center of the deceleration tank 1.

In this way, the quadratic forced rotation body 18 is placed in the center of the deceleration tank 1.
．． 18' and rotate it around the vertical axis,
With respect to the primary flow S+ of the water to be treated W' led into the deceleration tank l from the inflow pipe 5, the secondary flow S2 generated in the vertical direction becomes stronger, and the sand, etc. contained in the water to be treated W' becomes stronger. This is extremely advantageous because it facilitates the separation of solid matter, suspended matter, organic matter, etc. Furthermore, if a large number of irregularities, through holes, etc. are provided on the surface of the cylindrical or disk-shaped secondary force rotation body 18, 18', the generated secondary flow S2 can be further strengthened. can.

In the embodiment shown in FIGS. 6 and 7, the upper end of the quadratic forced rotation body 18, 18' is connected to the motor, which is the drive source 20, via a flexible joint 19 such as a universal gigo-point. is connected to the quadratic forced rotation body 18.18
The lower end of ' is free because the bearing is omitted.

This is because the quadratic forced rotating body 18, 18' vibrates slightly due to the influence of complex flows when rotating, so if it is supported by a bearing, the bearing is likely to break down in a short period of time due to vibration. The lower end of the forced rotating body 18.18' not only has a complicated bearing structure, but also is always under the liquid level, making maintenance and inspection difficult. Therefore, the lower end bearing is omitted, and the upper end is made flexible. When connected to the drive source 20 through the joint 19, the vibrations acting on the secondary flow forcing rotating body 18, 18' are effectively absorbed by the flexible joint 19, and even without the lower end bearing, the It has been confirmed that the downstream forced rotating body 18°18' rotates relatively stably and smoothly under the liquid surface, and can be used with confidence.

Next, FIGS. 8 and 9 are sectional views of a moderating tank of a solid-liquid separator, respectively, showing still other embodiments of the present invention.

In the embodiment shown in FIG. 8, in the center of the bottom plate 3 of the deceleration tank 1,
In addition to providing a solid matter reservoir 21, a solid matter reservoir 21 is provided at the lower end at the center of the cylindrical secondary flow forced rotating body 18 shown in FIG.
The solid matter discharge cylinder 22 facing the secondary flow forced rotating body 1
8 and the solid matter discharge cylinder 22 is used as a passage for pumping up the solid matter.In this embodiment, the solid matter reservoir 21 is provided in the solid matter discharge cylinder 22.
A pump 23 is built in to pump up solid matter accumulated in the tank.

Further, in the embodiment shown in FIG. 9, a solid matter reservoir 21 is provided at the center of the bottom plate 3 of the deceleration tank 1, and a center portion of the disk-shaped secondary flow forced rotation body 1B' shown in FIG. A solid matter discharge cylinder 22 whose lower end faces the solid matter reservoir 21 is provided integrally with the secondary flow forced rotating body 18', and the solid matter discharge cylinder 22 is used as a solid matter discharge passage. In this embodiment, a spiral blade 24 for pumping up the solids accumulated in the solids reservoir 21 is built into the solids discharge cylinder 22 .

In each of the embodiments shown in FIGS. 8 and 9, 25 is a receiving gutter for receiving solids discharged from the upper end of the solid material discharge cylinder 22, and the solids received by the receiving gutter 25 are , is led to the outside of the deceleration tank 1 via a discharge path (not shown).

In the embodiment shown in FIG. 8, when the diameter of the cylindrical secondary flow forced rotation body 18 is small, the solid matter discharge cylinder 22 is also used as the cylindrical secondary flow forced rotation body 18. can be done. . However, in that case, the surface of the solid matter discharge cylinder 22 can be provided with irregularities, and although the through holes may be provided in a part of the lower part, it is better not to provide them in the upper part.

Further, the spiral vane 24 shown in FIG. 9 may be built into the solid matter discharge cylinder 22 shown in FIG. 8, or conversely, the pump 23 shown in FIG. It may be built into the cylinder 22 for use.

In this way, if the pump 23 or the spiral blade 24 is built into the solid matter discharge cylinder 22 and the inside of the solid matter discharge cylinder 22 is used as a passage for pumping up the solid matter 22, the bottom plate of the deceleration tank 1 can be There is no need to construct a passageway or a discharge device in the lower part for discharging the solid matter accumulated in the solid matter reservoir 21, and the foundation work etc. are also very simple, which is extremely convenient.

[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 guiding them to a retention tank or a dust collection room to collect and separate them, they can be efficiently removed, and solids such as sand contained in the water to be treated can be removed by changing their wood grain characteristics. It can be effectively used to settle and be removed, and it is inexpensive and easy to handle.

In addition, by rotating the secondary flow forcing rotating body installed in the center of the deceleration tank, the secondary flow effective for solid-liquid separation becomes stronger, further separating solids such as sand, suspended matter, organic matter, etc. It can be promoted.

In addition, the secondary flow forced rotation body vibrates slightly due to the influence of complicated flows when rotating, but by connecting the upper end of the secondary flow forced rotation body to the drive source via a flexible joint, Since it absorbs vibrations and eliminates the need for a bearing at the lower end of the secondary flow forced rotation body, it is possible to avoid the use of bearings that are prone to failure due to vibration, and the rotation of the secondary flow forced rotation body is smooth and long-lasting. It enables stable operation for a long period of time, and maintenance and inspection are easy. With these advantages, it is possible to provide a solid-liquid separator that is extremely effective in practice for removing solid matter such as sand, suspended matter, organic matter, etc. contained in water to be treated.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a solid-liquid separator showing one embodiment of the present invention, and FIGS. 2, 3, and 4 are arrow views A-A and B-B shown in FIG. 1, respectively. 5 is a plan view of a solid-liquid separator' showing another embodiment of the present invention, and FIGS. 6 and 7 are cross-sectional views taken along line C-C. A cross-sectional view of a moderation tank of a solid-liquid separator showing an example of
FIGS. 8 and 9 are cross-sectional views of solid-liquid separators showing still other embodiments of the present invention. 1.1'...Deceleration tank, 2.2'...Side wall, 3
．． 3'...bottom plate, 4.4'...inlet,
5... Inflow pipe, 6,6'... Outlet,
7... Outflow path, 8... Outflow pipe, 9...
・Retention chamber, 10...dust collection chamber, 11...
・Recovery separation device, 12...gate, 13...
Water collection chamber, 14... Communication port, 15... Auxiliary pump, 16... Auxiliary pipe, 17... Additive, 18.18'... Secondary flow forced rotating body, 19... Flexible joint, 2... Drive source, 21... Solid matter reservoir, 22... Solid matter discharge cylinder, 23... Pump, 24
...Spiral blade, 25...Gutter, W'...
・Water to be treated, W, w... Treated water, Sl...
-Secondary flow, S2...Secondary flow. A”

Claims (1)

[Scope of Claims] 1) An inlet for supplying the water to be treated is provided on the side wall of the moderation tank consisting of a circular or square side wall and a bottom plate, and the side wall or the bottom plate at a position lower than the inlet is provided with an inlet, In addition to providing an outlet for discharging the treated water, a retention chamber is provided outside the deceleration tank that opens at the liquid level in the deceleration tank to guide floating matter on the liquid surface, and is connected to the retention chamber. A solid-liquid separator characterized by being provided with a dust collection chamber for collecting and separating floating matter etc. introduced into the retention chamber. 2) The solid-liquid separator according to claim 1, further comprising a cylindrical or disc-shaped secondary flow forced rotating body that rotates around a vertical axis, provided in the center of the moderation tank. 3) Claim 2 characterized in that the upper end of the secondary flow forced rotation body 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. solid-liquid separation equipment.