JPS6039192Y2 - Sludge dewatering equipment - Google Patents

Description

[Detailed description of the invention] The present invention is a sludge dewatering device that continuously and efficiently separates liquid and solid from sludge and other difficult-to-filter sludge generated from human waste, sewage, various industrial waste liquids, etc. Regarding.

Conventionally, there are vacuum dehydrators, centrifugal dehydrators, press dehydrators, and the like as devices for dewatering muddy materials, and press dehydrators are used when the purpose is to lower the water content.

As one type of press dehydration apparatus, in addition to a device using rotating rolls, a device that uses a pair of press plates to compress and dehydrate the water between the press plates, and a device that uses a combination thereof are known.

The present invention relates to an improvement of a sludge dewatering device constructed by a combination of rotating rolls and pressing plates.

Conventionally, it is known that a slurry dewatering device that combines a rotating roll and a pressing plate performs dewatering by pressing on the roll surface using the pressure of the pressing plate, but there is a limit to the dewatering speed and the processing capacity is small. , the water content of the dehydrated cake is also relatively high.

The present invention is an attempt to improve these conventional problems, and aims to provide an apparatus that significantly increases the dehydration rate compared to the conventional apparatus and obtains a dehydrated cake with an extremely low water content. be.

That is, the present invention provides an apparatus in which sludge is conveyed by at least two endless furnace cloth belts and dehydrated under pressure using one or more rolls, in which one of the rolls is pressed so as to pinch the furnace cloth belt. The sludge dewatering device is provided with a pressing plate at at least one opposing position, and an ultrasonic vibrator is provided on at least one of the pressing plate or the roll.

An embodiment of the present invention will be described with reference to the drawings.
2 has a concentration section A1 and a dehydration section B1 along its running direction.
A supply section 3 is disposed to form a peeling section C, and at an end of the concentration section A is provided a supply section 3 for supplying slurry.

A pressure roll 5 without a pressure plate 6 and a pressure roll 5' having a pressure plate 6 are disposed in the dewatering section B, and an endless furnace cloth belt 1 superposed on these pressure rolls 5 and 5' is disposed. .2
In the press roll 5' which has an S-shape and has a press plate 6, the furnace cloth belts 1 and 2 are connected to the press roll 5' and the press plate 6.
The pressure roll 5,
5' and the pressing plate 6 are all provided with an ultrasonic vibrator 7.

The pressing plate 6 may be provided with a pressure generating device 10 as shown in the figure so as to be movable up and down, or may be provided with a diaphragm and provided with an inlet for high pressure gas or pressure water; in the latter case. has the advantage that it can be used with the pressing plate 6 fixed.

Further, it is preferable that at least one of the pressure rolls 5, 5' and the compression plate 6 is provided with a water passage hole. If water holes are provided, the dewatering effect will be significantly improved.

Further, it is preferable that the pressing surfaces of the pressure roll 5' and the pressing plate 6 are made uneven so that they mesh with each other, and this has the effect of increasing the filtration area.

When only one pressure roll is provided in the dewatering section B, the pressure roll is configured to have a pressing plate attached (in other words, the pressure roll corresponds to the pressure roll 5'). It turns out.

) If two or more pressure rolls are installed, all pressure rolls may be used as pressure rolls 5', but as shown in the figure, pressure rolls 5 and 5' may be combined and the former placed before dewatering section B. , it is reasonable to arrange the latter at the latter stage.

Although it is desirable that the ultrasonic vibrator 7 be attached to all the pressure rolls 5, 5' and the press plate 6 in the dewatering section B as shown in the figure, it may be attached to only some of these.

For example, the ultrasonic vibrator 7 may be attached only to the pressure rolls 5, 5', or conversely only to the press plate 6, or only to the press roll and press plate 6 in the latter half of the dewatering section B. You can also do it.

Further, it is preferable to provide a support plate for the pressure roll 5' on the side opposite to the side where the pressure roll 5' is squeezed by the compression plate 6, so that the pressure roll 5' can be reinforced.

Note that when a plurality of pressure rolls are provided, the diameters of these rolls do not necessarily have to be the same.

The slurry to be dehydrated is supplied to the supply section 3, concentrated by gravity or in vacuum in the concentration zone A, and then enters the dewatering zone B. The cake is effectively dehydrated by a pressure roll 5' having a pressing plate 6, resulting in a cake with an extremely low water content, which is peeled off by peeling devices 8 and 9 and discharged from the system.

The moisture content of the cake is significantly reduced because the synergistic effect of the compression dehydration and the ultrasonic vibration provided by the ultrasonic vibrator 7 promotes the separation of water in the slurry.

The frequency of ultrasonic vibration is 20kHz or higher according to the general definition of ultrasonic waves, but the definition when used for technical applications is to apply sound waves that are not intended for one person to hear or for one person. It has come to be said that it is an application of sound waves that transcends the human ear.

Therefore, it can be applied even below 20kHz, and from 1kHz to IM
A range of H2 can be utilized.

In addition, the output can be set depending on the properties of the muddy material.
The larger the size, the better the dehydration effect.

The ultrasonic vibrator 7 can be appropriately selected from magnetostrictive vibrators, piezoelectric vibrators, electrostrictive vibrators, etc., and is not particularly limited in shape.

Alternatively, a horn may be attached to the ultrasonic vibrator 7 and vibrations may be applied from the horn.

Further, the ultrasonic vibrator 7 may be attached to either the outer surface or the inner surface of the pressure roll 5.degree. 5' and the pressing plate 6.

If the pressure rolls 5, 5' and the pressing plate 6 in the dehydration section B are used as heating rolls and heating plates, respectively, the dehydration effect can be further improved.

As described above, the present invention provides an apparatus for transporting sludge using at least two endless furnace cloth belts and pressurizing and dehydrating it using one or more rolls, in which the furnace cloth belts are compressed. Since this is a dewatering device in which a pressing plate is provided at a position facing at least one of the rolls, and an ultrasonic vibrator is provided on at least one of the pressing plate or the roll, the synergistic effect of pressing dehydration and ultrasonic vibration It has become possible to dehydrate extremely effectively and obtain a dehydrated cake with extremely low moisture content, and the dehydration processing capacity has also been greatly increased.Furthermore, there is almost no clogging of the furnace cloth, and stable dehydration processing can be performed for a long time. It has many advantages, such as being able to continue operating, improving the operating rate, and simplifying operation management.

[Brief explanation of drawings]

The drawing is a system explanatory diagram showing an embodiment of the present invention. 1.2... Furnace cloth belt, 3... Supply section, 4... Guide roll, 5, 5'... Pressure roll, 6... ... Pressing plate, 7 ... Ultrasonic vibrator, 8゜9 ... Peeling device, 10 ... Pressure generation device. A... Concentration section, ... Dehydration section, C.
...Peeling section, D...Mud.

Claims (1)

[Claims for Utility Model Registration] l An apparatus for transporting sludge using at least two endless furnace cloth belts and dewatering under pressure using one or more rolls, in which the furnace cloth belts are compressed. A sludge dewatering device, comprising: a pressing plate provided at a position facing at least one of the rolls, and an ultrasonic vibrator provided on at least one of the pressing plate or the roll. 2. The oven cloth belt has a concentration section along the running direction,
The sludge dewatering device according to claim 1, which is arranged to form a dewatering section and a peeling section.