JPS5833003B2 - Equipment for separating water-containing suspensions, in particular wastewater sludge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to separating a suspended substance in a liquid layer so that a water-containing suspension is sufficiently precipitated and the liquid layer is separated from the suspended substance as much as possible. related to a device for

To this end, the dispersion of solid particles is concentrated by settling out the solids or by excluding water from the voids between the solid particles, thus reducing the volume of the concentrated suspension and increasing its specific gravity. And it must be allowed to settle.

In this case, the liberated water is separated upwards, where it
It is discharged by suitable equipment.

The concentrated suspension that remains is thus reduced in volume and therefore all the costs required for further processing of the suspension are correspondingly less.

The separation step or concentration in devices according to the prior art is generally carried out in tanks constructed for separation or concentration with square or circular contours.

Basically, two separation principles that are purely physical in nature can be distinguished.

That is, in the first principle, the separation or concentration effect is obtained by simple settling of a stationary suspension within a certain period of time, whereas in the second principle,
The concentration effect can be obtained by stirring using a slowly rotating stirring device or stirring device.

In the case of the first process, the concentration time is very long and
This has the disadvantage that the concentration time cannot be shortened, whereas in the case of the second process.

The equipment required for this process is relatively expensive, and the tanks required to carry out this process must be specially constructed for the purpose.

For reasons of construction, it is almost impossible to install stirring or agitating devices later on in tanks that have not been specially manufactured, or without incurring significant additional costs. It cannot be installed.

Despite spending a great deal of money on installing and operating agitators and the like, it is often the case that only minimal or no success is achieved.

The object of the invention is to provide a device, in particular for the separation of water-containing suspensions of wastewater sludge, with which the separation and concentration processes can be carried out reliably.

The device of the present invention is constructed so that it can be retrofitted to a tank for which it was not originally installed.

According to the invention, the device is designed as a hollow body with a vibrating body having a surface for transmitting vibrations and fully or partially immersed in the suspension, and arranged inside the vibrating body. The vibration generating device is configured to be connected to the vibration generating device so as to be able to transmit vibrations.

The vibrating body serves to transmit vibrations to the suspended object.

The generated vibrations displace water in the interstices between individual solid particles and cause the particles to pile up on each other, thereby facilitating the separation and concentration process.

According to the device of the invention, the separation effect and concentration effect of water-containing suspensions, in particular clarified sludge, is improved or accelerated by applying vibrations, in which case the frequency and amplitude of the vibrations are It is adapted to the nature and characteristics of the medium to be treated and to the given local conditions.

The vibrations are transmitted to the suspension by a hollow vibrating body immersed in the suspension.

A vibration generator disposed inside the vibrating body vibrates the immersed vibrating body via a predetermined component, and
This kind of secondarily excited vibrations of the vibrating body are radially dissipated from the vibrating body and transmitted to the suspended material, thus resulting in the desired improvement and promotion of the separation and concentration effects. be.

As a vibration generator, for example, an electric vibrator 1 such as that used for concrete mixtures can be used.
Hydraulic vibrator or pneumatic vibrator
Equipment commonly available for use can be used, such as.

According to another embodiment of the invention, one or more floating bodies are attached to the vibrating body.

Thus, the vibrating body is made to float, so that the vibrating body
All up and down movements of the water surface can be automatically followed, even though the filling height is constantly changing.

The floating body or bodies can be designed as a hollow body.

The floating body or bodies may be equipped with a device for adjusting the immersion depth, so that the vibrating body can be immersed to different depths in the suspension.

The one or more floating bodies can be connected to the vibrating body via a device that does not transmit vibrations or at least damps vibrations.

By using one or more floating bodies mounted around the vibrating body, it is possible to adapt the position of the vibrating body to the state of the liquid in the tank, thereby reducing the distance between the vibrating body and the liquid. It is possible to obtain the maximum possible contact area and the highest possible efficiency of the device.

According to a further embodiment of the invention, the intake port, which is flexibly connected to the intake pipe for the medium to be treated, is arranged coaxially with the vibrating body.

Furthermore, the vibrating body includes the one or more floating bodies;
With the aid of a device for adjusting the immersion depth, it can be arranged sufficiently deep below the water surface, said device thus acting at the same time as a means of dispersing the medium to be treated.

Said device can be installed at the same time to disperse the supplied medium, so that the medium is subjected to very strong and uniform vibrations as it flows in.

By applying vibrations to the flow of the homogeneously distributed suspension, the separation effect can be very advantageously influenced when introducing the suspension into the tank.

The device according to the invention can be retrofitted or installed in a separation tank or a concentration tank in a very simple manner.

The device is constructed of simple and sturdy construction using inexpensive components.

The present invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

The medium T to be thickened, for example clarified sludge, is contained in a tank 1, for example of cylindrical or square cross-section, such as those already used in waste water purification installations.

Such tanks are usually not designed for later installation of a stirring device, but can be equipped with the device of the invention in a simple manner.

The vibrating body 2 is constituted by a hollow cylinder with a large surface area, and the immersed surface of the hollow cylinder is at a constant ratio to the internal volume of the concentration tank 1.

The vibration generator 3 inside the vibrating body is arranged in a water-tight casing and is surrounded by sturdy ribs 4.
Therefore, it is connected to a hollow cylinder, and therefore,
The vibrations generated by the vibration generator 3 are transmitted to the vibrating body 2 via the ribs 4, and then radiated from the vibrating body 2.

Advantageously, the ribs 4 are configured in such a way that they can function as distribution elements for the fluidized suspension passing through the vibrating body 2 .

Thanks to the radiant vibrations propagating substantially concentrically to the radiating surface, the concentration of the wastewater sludge in the tank 1 is improved or accelerated.

The frequency and amplitude of the vibrations can be adjusted, for example, by changing the rotational speed or by changing the unbalance of the vibration generator 3.

The immersion depth of the vibrating body 2 can be adjusted by means of a ring-shaped floating body 5 arranged concentrically with the vibrating body, which floats via a vibration damping element 6. 2 is connected.

In order to adjust the position of the floating body 5 with respect to the liquid level P in the tank 1 and the corresponding immersion depth of the vibrating body 2, the floating body 5 has one or more floating bodies 5 for containing liquid or solid ballast material 8. It has an injection lower.

The vibrating body 2 is suspended on a rope 9 together with elements connected to said vibrating body 2, such as a vibration generator 3 and a floating body 5, so that the vibrating body 2 is connected to the winch 1.
0 allows it to be lifted from tank 1.

After the required time for the separation process has elapsed, once the desired effect has been achieved and the sludge has been separated from the water, the sludge-free water located above the concentrated sludge S can be removed at various heights. It is discharged through an attached drain pipe 11.

The sludge is then removed through a discharge pipe 12 extending from the bottom of the tank 1.

An inlet 13 centered on the vertical axis A of the vibrating body 2 serves to refill the tank 1 with fresh suspended matter or sludge-containing waste water; Flexible pipe or hose 1
It is connected to the conduit 14 via 5.

As is clear from the above description, the device constructed according to the present invention can be installed in almost all tanks that have been manufactured only for simple separation or concentration of suspensions without using a centrifugal device. Can be done.

When using a device constructed according to the invention, the shape of the tank is of only secondary importance to the functioning of the device.

This is because the device according to the invention can be adapted to tanks of various sizes.

The device according to the invention has no moving parts that come into direct contact with the suspension, so this does not necessarily stop the separation process.

[Brief explanation of the drawing]

The accompanying drawing is a partially cutaway elevational view showing one embodiment of the device of the present invention. 1... Tank, 2... Vibrating body, 3...
...Vibration generator, 4...Rib, 5...
...Floating body, 6...Vibration damping device, T...
...Inlet, 8...Ballast material, 9...
...Rope, 10...Winch, 11...
...Drain pipe, 12...Drain pipe, 13...
・Intake, 14... Conduit, 15... Flexible pipe.

Claims (1)

[Claims] 1. A vibrating body 2, which has a surface for transmitting vibrations and is fully or partially immersed in a suspension, is designed as a hollow body and is arranged inside the vibrating body. A device for separating a water-containing suspension, in particular a waste water sludge, characterized in that the device is connected in a vibration-transmissible manner to a vibration generator 3 which has a vibration generator. 2. The device according to claim 1, wherein one or more floating bodies 5 are attached to the vibrating body 2. 3. Device according to claim 2, characterized in that the floating body or bodies 5 are designed as hollow bodies. 4. The device according to claim 2 or 3, characterized in that the one or more floating bodies 5 are provided with a device for adjusting the immersion depth. 5. Device according to claim 2, characterized in that the one or more floating bodies 5 are connected to the vibrating body 2 via a device for damping vibrations. 6. The apparatus according to claim 1, characterized in that the intake pipe 14 for the medium to be treated and the flexible intake port 13 are arranged coaxially with the vibrating body 2. 7 The vibrating body 2 is connected to the vibration generator 3 via a rib 4, and the rib 4 passes through the intake port 13 to the vibrating body 2.
7. A device according to claim 1, characterized in that it is constructed as a means for uniformly dispersing a medium flowing into the device.