JPS6057439B2 - Sludge dewatering equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of the "sludge dewatering device" proposed in Japanese Patent Application No. 132311/1982.

The sludge dewatering device proposed in Japanese Patent Application No. 56-132311 is a belt press type sludge dewatering device that dewaters sludge by sandwiching it between a pair of endless filter cloths.
, A, ↓-n-6 bamboo ι, l ゛, ri--1, , ni,
TELf, -▼'', rl--Ichipata-1゛1 Rear-Glance
---- By integrally supporting the fabric and moving it back and forth, continuous fetuses are made possible.

In such sludge dewatering equipment, it is impossible to lengthen the dewatering time, which is a factor that affects the moisture content of the dehydrated cake, and in order to lengthen the dewatering time, it is necessary to reduce the amount of sludge supplied to the pressurizing section. It was hot.

The present invention has been made in consideration of the above facts, and an object of the present invention is to obtain a sludge dewatering device that can increase the amount of sludge that can be supplied to the pressurizing section and improve the dewatering efficiency.

In the sludge dewatering apparatus according to the present invention, a plurality of pressurizing parts that apply pressure in the direction of bringing the opposing filter cloths into close contact with each other are provided with gaps in the traveling direction of the filter cloths, and a plurality of pressurizing parts are provided with gaps between these pressurizing parts. By wrapping the opposing filter cloth around the roller and folding it back, the dewatering time can be extended without increasing the size of the dewatering device, and the length of the pressure section and the length of the filter cloth between the pressure sections can be made equal. It is configured.

Embodiments of the present invention will be described below with reference to the drawings.

In a first embodiment of the present invention shown in FIG. 1, a pair of endless filter cloths 10 and 12 are each wound around a plurality of rollers. The endless filter cloth 10 has a driving roller 14 and a driven roller 16.
, 18, common rollers 20 to 24, timing roller 26, common rollers 28 to 33, and timing roller 24, and are folded back and returned to drive roller 14.

The drive roller 14 receives the driving force of the motor 36 and rotates the filter cloth 1.
0 in the direction of arrow A. On the other hand, the endless filter cloth 12 is wound around the driving roller 38 and the driven rollers 40 and 42 and folded back, and then, like the endless filter cloth 10, it is wound around from the common roller 20 to the timing roller 34, then folded back and returned to the driving roller 38. When the drive roller 38 is rotated by the motor 36, the endless filter cloth 12 is moved in the direction of arrow B.

Therefore, the endless filter cloths 10 and 12 form a contact section in which the parts from the common roller 20 to the timing roller 34 are wrapped around these rollers and folded back, so that the sludge is conveyed while being sandwiched between the two filter cloths. It's summery.

Pressure parts 44 and 46 are provided between common rollers 29 and 30 and between 31 and 32, respectively.

The pressure section 44 is provided with a pair of pressure plates 48, 50 with the endless filter cloths 10, 12 therebetween, and the pressure section 46 is similarly provided with pressure plates 52, 54. Among these pressure plates, the pressure plate 48 is driven by a drive device such as a hydraulic force (not shown) to the pressure plate 50.
Similarly, the pressure plate 54 is driven in the direction of the pressure plate 52 to apply strong pressure to the endless filter cloths 10 and 12, thereby dehydrating the sludge held between the endless filter cloths 10 and 12.

Here, the lengths of the pressure plates 48, 50 and the pressure plates 52, 24 in the endless filter cloth traveling direction are equal to each other, and the pressure plates 48, 50
The lengths of the endless filter cloths 10, 12 from the filter cloths 10, 12 to the pressure plates 52, 54 are also made equal.

Therefore, if the endless filter cloth is advanced by pitch feeding for each length of the pressure plates, the endless filter cloths 10 and 1 held between the pressure plates 48 and 50 will be
2 moves between the pressurizing parts 44 and 46 in the next process, and is strongly pressurized again by the pressurizing plates 52 and 54 in the next process, so that the sludge held between the endless filter cloths is reliably pressurized by the pressurizing parts 44 and 46. Becomes dehydrated under pressure. During the pressurizing operation of the pressurizing parts 44 and 46, the endless filter cloth stops advancing, but on the other hand, the drive rollers 14 and 38 continue to drive the endless filter cloths 10 and 12, so they are the upstream pressurizing parts. The timing roller 26 provided upstream of the pressure section 44 and the timing roller 34 provided downstream of the pressure section 46, which is a downstream pressure section, absorb the amount of movement of the moving filter cloth. It's becoming like that.

That is, the timing rollers 26 and 34 are connected by a connecting rod 56 so that they move together, and the upstream and downstream filter cloths of these timing rollers 26 and 34 are arranged substantially parallel to each other. There is. That is, the filter cloth between the common roller 24 and the timing roller 26 and the filter cloth between the timing roller 26 and the common roller 28 are parallel to each other, and the timing roller 34 and the common roller 33, the filter cloth, and the timing roller are parallel to each other. The filter cloths between 34 and drive roller 38 are also parallel to each other. Furthermore, the timing rollers 26 and 34 are movable in the direction of the common roller 24 or the drive roller 38, and are connected to a drive device (not shown), so that when the pressure applying parts 44 and 46 are pressurized, the timing rollers are moved in the direction of the drive roller 38. When the pressure in the pressure section is reduced, it is moved in the direction of the common roller 24. To explain the operation of this embodiment configured in this way, by driving the motor 36, the drive rollers 14, 38 move the endless filter cloths 10, 12 in the direction indicated by the arrow A.
They are each moved in the B direction.

When sludge is supplied between the driven rollers 18 and 42, the sludge is held between the endless filter cloths 10 and 12 in the opposing portions and advances. The advanced sludge reaches the pressurizing section 44, and the pressurizing plates 48, 50 of this pressurizing section 44 are driven to compress the endless filter cloths 10, 12.

During this pressurization, the pressurized filter cloth stops advancing, so the timing rollers 26 and 34 move in the direction of the drive roller 38 to move the filter cloth sent to the opposing section and the filter cloth sent out from the opposing section. absorb amount.

If the endless filter cloth in the pressurizing section is repeatedly pressurized while advancing the endless filter cloth for each length of the pressurizing plate in the pressurizing section, the sludge will be reliably pressurized twice in the pressurizing sections 44 and 46. As a result, the pressurization time increases and the moisture content decreases.

This pitch feeding work of the endless filter cloth is carried out by the timing roller 2.
By appropriately driving 6 and 34, it is possible to quickly perform pitch feeding work independently of the driving force of the motor 36.

Next, FIG. 2 shows a second embodiment of the present invention, in which the pressurizing parts 44 and 46 in the previous embodiment are replaced by one
This pressurizing section 58 is provided with pressurizing plates 60, 62- and a shared fixed pressurizing plate 64, and the pressurizing plates 60, 64 are arranged in the direction of the endless filter cloth 10, 12
The pressure plates 62 and 64 are adapted to pressurize the endless filter cloths 1 and 12 on the downstream side, respectively.

Therefore, the pressure plate 62 is shared by the pair of pressure parts. Furthermore, in this embodiment, the endless filter cloth between the pressurizing parts is folded back by one common roller 66, but the length of the endless filter cloth held between the pressurizing plates 60 and 64 is The length of the endless filter cloth and the common roller 66 between these pressurizing parts
The length of the endless filter cloth is equal to the length of the endless filter cloth that is folded back, and the sludge is reliably pressurized at two locations as in the previous embodiment.

The rest of the configuration is the same as that of the embodiment described above, and in addition to the embodiment described above, the device can be further miniaturized in this embodiment.

As explained above, the sludge dewatering device according to the present invention has a plurality of pressurizing parts with gaps in the traveling direction of the filter cloth, and the length of the pressurizing part and the length of the filter cloth between the pressurizing parts are made equal, so that dewatering is possible. It has an excellent effect of increasing the time and reducing the moisture content of the dehydrated cake.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of a sludge dewatering apparatus according to the present invention, and FIG. 2 is a system diagram showing a second embodiment of the present invention.

Claims (1)

[Claims] 1. A pair of endless filter cloths are each wound around a plurality of rollers, and a portion of both filter cloths are brought into contact with each other to sandwich the sludge 1, and the opposing filter cloths are held in this contact section. A plurality of pressurizing parts that apply pressure in the direction of bringing the filter cloth into close contact with each other are provided with gaps in the traveling direction of the filter cloth, and the opposing filter cloths between these pressurizing parts are wrapped around a roller and folded back, and the upstream and downstream sides are In a sludge dewatering device in which the filter cloths downstream of the side pressure parts are wound around rollers, and these rollers are connected to absorb the moving filter cloth during pressurization, the filter cloths on the downstream side of the plurality of pressure parts A sludge dewatering device characterized in that the length of a filter cloth between a pressurizing section and a downstream pressurizing section and the pressurizing sections on the upstream and downstream sides are made equal. 2. The sludge dewatering device according to claim 1, wherein the pressurizing section has a pair of pressurizing plates sandwiching a filter cloth, and the pressurizing plate on one side of the pair of pressurizing sections disposed before and after the roller is shared. .