JPH0220360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of operating a sludge dewatering apparatus that continuously dewaters sludge generated in water treatment such as water treatment, industrial wastewater, and other water treatment.

[Conventional technology]

A device in which an endless filter cloth belt is movably hung around a plurality of roll groups in a face-to-face polymerized state, and dewatering is performed using a plurality of pressing rolls while squeezing sludge between these filter cloth belts is a device that can be used in various dewatering machines. In response to the trend toward energy saving, dehydration performance such as dehydration to obtain a dehydrated cake with a lower water content is required for this equipment, and various improvements have been made. for example,
A shear dewatering section is provided which is formed by a sun roller and a planetary roller circumscribing the sun roller, and in this shearing dewatering section, the planetary rollers apply shearing force to the sludge sandwiched between the filter cloth belts while shearing and dewatering the sludge. A device with improved dehydration efficiency has been proposed.

[Problem that the invention seeks to solve]

However, in a sludge dewatering device equipped with a shearing dewatering section formed from the sun roller and planetary rollers, the number of times of shearing is determined by the number of planetary rollers, and depending on the properties of the sludge, the expected dewatering may not always be achieved. The problem was that there were many cases where it was not possible.

The present invention provides a method for operating a sludge dewatering device that can adjust the number of times of shearing without being limited by the number of planetary rollers, perform accurate dewatering according to the properties of sludge, and improve dewatering efficiency. The purpose is to provide the following.

[Means for solving problems]

The present invention has an endless filter cloth belt that is movably hung around a plurality of roll groups in a face-to-face polymerized state, and in order to perform shear dewatering while compressing sludge between these filter cloth belts, a sun roller and a roller are connected to each other. A sludge dewatering device equipped with a shearing dewatering section formed by a sun roller and a planetary roller circumscribing the sun roller, wherein the sun roller is fixed and the planetary roller is caused to revolve by a running filter cloth belt. It provides a driving method.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Figure 1 is an overall configuration diagram of the sludge dewatering equipment.
An endless filter cloth belt 2 that is supplied with sludge 1 and an endless filter cloth belt 3 that is not supplied with sludge 1 are connected to a drive device (not shown) and rotate at the same speed as a drive roll 4 and a plurality of rolls. It is mounted on the 5th group so that it can travel in a face-to-face state. Further, the vicinity of the sludge supply section of the filter cloth belt 2 is a gravity dewatering section G provided with a large number of support rollers 6, and then the filter cloth belts 2 and 3 are superposed with the sludge 1 in between.

Furthermore, a shear dewatering section
After running, the cloth belts 2 and 3 are separated, and the dehydrated cake 7 is peeled off and falls onto the conveyor 8. In this case, a pressing roll (not shown) can be appropriately arranged in front of the shear dewatering section X.

In the figure, numeral 9 indicates a cleaning device for each of the filter cloth belts 2 and 3.

As shown in FIG. 2, the structure of the shear dewatering section ing. These shear dehydration parts X are 2 in the illustrated example.
There are two locations, but it can also be one location.

Further, as shown in FIGS. 2 to 5, the planetary rollers 11 are rotatably connected to each other by a carrier 12. Further, the sun roller 10 is provided with a rotating shaft 13 at its end, a sprocket 14 is connected to the rotating shaft 13, and rotation is applied to the sun roller 10 by a drive device (not shown) via a chain 15. However, as shown in FIGS. 6 and 7, the rotating shaft 13 is fixed to a fixed support member 16 with a pin 17 or the like, or the sun roller 10 is fixed by any other suitable method.

The planetary rollers 11 can be connected not only by the carrier 12, but also by supporting both ends with rotating support plates or the like to adjust the revolution speed of the planetary rollers 11.

The sludge 1 to be dewatered is supplied onto the running filter cloth belt 2, dewatered by gravity while traveling through the gravity dewatering section G, turned and polymerized facing the filter cloth belt 3, resulting in sludge 1 reaches the shear dewatering section X while being sandwiched between both filter cloth belts 2 and 3,
It runs on the outside of a plurality of planetary rollers 11 while being under tension, and receives shearing force from the planetary rollers 11 one after another. At this time, the filter cloth belt 3 gives rotation to the planetary roller 11, and the planetary roller 11 revolves around the sun roller 10 in the same direction as the filter cloth belts 2 and 3 while rotating in the same direction as the filter cloth belts 2 and 3. I will do it. In this way, the revolution of the planetary roller 11 is
Filter cloth belts 2, 3 without the need for other power
This is done by running.

During this shear dehydration, the planetary roller 11 receives a radial force generated by the tension of the filter cloth belts 2 and 3, but since the sun roller 10 is in contact with the planetary roller 11 in the same radial direction, the planetary roller 11 The radial force received by the sun roller 10 is directly transmitted to the sun roller 10. Therefore, the planetary roller 11
In this case, it is no longer necessary to consider the bending of the planetary roller 11 in the length direction with respect to the radial force received from the filter cloth belts 2 and 3.

Furthermore, by supporting the end of the planetary roller 11 with a rotating support plate, etc., and adjusting the rotation of this support plate, the revolution speed V ₁ of the planetary roller 11 and the filter cloth belt can be adjusted as shown in FIG. The contact portion between the planetary rollers 11 and the filter cloth belt 23 moves by the relative speed caused by the difference between the running speeds V2 and ₃ , and the number of times of shearing by the planetary rollers 11 can be increased or decreased, which changes the properties of the sludge. Efficient dehydration can be achieved by applying a corresponding number of shearing cycles.

Note that the same operation as described above can be performed in the shear dehydration section at the subsequent stage.

Furthermore, as described above, since the radial force applied to the planetary rollers 11 is received by the sun roller 10, the diameter of the planetary rollers 11 can be reduced, and by reducing the diameter of the planetary rollers 11, , it is possible to generate high surface pressure with low tension, and furthermore, it is possible to discharge separated water from the gap between each planetary roller 11, and double-sided filtration is possible.

In this way, the dehydrated cake 7 that has been compressed and dehydrated while being subjected to shearing force is peeled off, falls down, and is conveyed by the conveyor 8.

〔Effect of the invention〕

As described above, according to the present invention, the number of times of shearing in the shearing dewatering section can be arbitrarily adjusted without being limited by the number of planetary rollers, and the dewatering efficiency can always be adjusted in accordance with the properties of the sludge. This is something that can be improved.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is an explanatory diagram of the overall configuration, FIG. 2 is an explanatory diagram of the configuration of the shear dewatering section,
Figure 3 is a front view of the shear dewatering section, Figure 4 is an enlarged view of part A in Figure 3, Figure 5 is a sectional view taken along the line - - in Figure 4, Figure 6 is an explanatory diagram of fixing the sun roller, FIG. 7 is a view taken along the - line arrow in FIG. 6. 1... Sludge, 2, 3... Filter cloth belt, 4... Drive roll, 5... Roll, 6... Support roller, 7... Dehydrated cake, 8... Conveyor, 9... Cleaning device, 10... Sun roller, 11... Planetary roller, 12...Carrier, 13
...Rotating shaft, 14... Sprocket, 15... Chain, 16... Support material, 17... Pin, G... Gravity dehydration section, X... Shear dehydration section.

Claims (1)

[Claims] 1. An endless filter cloth belt is movably hung around a plurality of roll groups in a face-to-face polymerized state, and in order to perform shear dewatering while compressing sludge between these filter cloth belts, a sun roller and a sun roller are attached to the sun roller. A method for operating a sludge dewatering apparatus equipped with a shearing dewatering section formed from circumscribing planetary rollers, characterized in that the sun roller is fixed and the planetary rollers are revolved by a running filter cloth belt.