JPS6138789Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides an endless band-shaped filter cloth that rotates from a gravity dewatering section to a forced dewatering section, and a device that supplies a material to be treated to the gravity dewatering section. The present invention relates to an improvement in a scraper mounting structure of a dewatering device that is provided with a scraper for removing cake that acts on the filter cloth from the forced dewatering section.

Conventionally, as shown in FIG. 4, the scraper 9 was fixed to a fixed mounting member 12 by tightening it with a bolt 16 and a nut 17 inserted through the elongated hole 15 of the mounting member 12.
The adhesion of the scraper 9 to the filter cloth 6 is likely to be unexpectedly damaged due to curvature or abrasion of the scraper 9, resulting in a decrease in cake recovery rate or insufficient cleaning of the filter cloth 6 due to residual cake. Problems such as decreased dehydration efficiency were likely to occur.

In view of the above-mentioned circumstances, an object of the present invention is to ensure that the scraper can remove the cake well.

A characteristic configuration of the scraper mounting structure according to the present invention is that the scraper mounting member is provided over the entire width of the filter cloth, and is provided so as to be swingable around an axis in a direction in which the scraper moves toward and away from the filter cloth. , a coil spring that urges the mounting member in a direction in which the scraper approaches the filter cloth is installed between the mounting member portions at both widthwise ends of the filter cloth on the swinging tip side of the scraper mounting position and the fixed frame. , the scraper is installed via a tension adjuster made of a bolt and nut, and the scraper is connected to the mounting member so as to be movable in the direction of approaching the filter cloth,
Push bolts for preventing the scraper from moving in a direction away from the filter cloth with respect to the mounting member are provided on the mounting member in parallel in the width direction of the filter cloth.

Therefore, the present invention produces the following effects. In other words, the two coil springs provided at both widthwise ends of the filter cloth on the swinging tip side of the scraper forcefully press the scraper into close contact with the filter cloth, ensuring good cake removal. Even if the scraper is bent or worn, no gap will be created between the filter cloth and the scraper, and by adjusting the connection position of the scraper with respect to the mounting member, the working posture and position of the scraper with respect to the filter cloth can be maintained in a good manner. A state in which peeling can be performed can be maintained. Depending on the cake peeling situation, the peeling situation can be further adjusted using a tension adjuster. By the action of the push bolt, a good working posture and position can be reliably maintained over the entire length of the scraper, even if the filter cloth is large.

As a result, it is possible to always and reliably remove the cake from the filter cloth with the scraper, improving the cake recovery rate, and it is also possible to thoroughly wash the filter cloth and improve the dewatering efficiency. It is now possible to provide a dewatering device that fully and reliably exhibits excellent performance.

Next, examples will be shown.

As shown in FIG. 1, a rotary mixer 3 is provided to mix the material to be treated supplied from the first storage tank 1 and the flocculant supplied from the second storage tank 2, and a side wall 4 and a rear wall 5 are provided. An endless belt-shaped first rotary filter cloth 6, which forms a gravity dewatering section A for the processed material from the mixer 3 in cooperation with the first rotary filter cloth 6, is provided to be freely rotatable. An endless strip forming forced dewatering sections B, C, and D, each having a constrictive dewatering zone B that gradually compresses the cake, a compressive dewatering zone C consisting of a reversing path, and a shear dehydrating zone D consisting of a meandering path. A second rotatable filter cloth 7 is provided so as to be freely rotatable.
The materials to be treated, such as sludge generated in various water treatments such as human waste, urban sewage, and industrial wastewater, are transferred from the gravity dewatering section A to the forced dewatering sections B, C, and D together with the first rotating filter cloth 6. The equipment is configured to send and continuously dehydrate the water.

scrapers 9a, 9b for peeling off cakes from the first and second rotary filter cloths 6, 7 from the forced dewatering sections B, C, D, respectively, and collecting them on the conveyor 8;
Additionally, a nozzle 10 for spouting filter cloth cleaning water is attached, and a container 11 for collecting the waste water obtained from the dehydration process and the filter cloth cleaning waste water is provided.

As shown in FIGS. 2 and 3, the scraper 9
The mounting members 12a, 12b of a, 9b are attached to the filter cloths 6, 7.
are provided over the entire width of the axis P.
The scrapers 9a and 9b are attached to the frame 13 so as to be swingable around the rotating filter cloths 6 and 7, and the scrapers 9a and 9b are attached in the direction of approaching the rotating filter cloths 6 and 7. spring 14,
14, the mounting members 12a, 12b at both ends of the filter cloths 6, 7 in the width direction on the swinging tip side from the mounting positions of the scrapers 9a, 9b, and the fixed frame 13.
A tension adjuster A consisting of a bolt 25 and a nut 23 is installed between the two and the tension adjuster A is provided so that the biasing force can be freely adjusted. Scrapers 9a, 9b are removed from their elongated holes 15.
Mounting member 1 with bolt 16 and nut 17 inserted into
2a, 12b, and the mounting members 12a,
12b, the connection position can be changed freely in the direction of approach to the rotary filter cloths 6, 7. A plurality of push bolts 18 are screwed onto the mounting members 12a and 12b, arranged in parallel in the width direction of the rotary filter cloths 6 and 7, and brought into contact with one end side of the scrapers 9a and 9b, thereby forming a scraper. The scrapers 9a, 9b are configured to be prevented from moving relative to the mounting members 12a, 12b in a direction away from the rotating filter cloths 6, 7, regardless of the mounting position of the scrapers 9a, 9b. Note that 24 is a cover that prevents cake from adhering to the push bolt 18.

A sprocket 20, which can be rotated in forward and reverse deceleration directions, is attached to the frame 13 using a handle 19, and the ends of a long chain 21 wound around the sprocket 20 are configured to be freely connected to both mounting members 12a and 12b with bolts 22, so that they can be used for repair and inspection. Both mounting members 12a,
12b is configured so that it can be easily moved up and down by operating only one handle 19.

Next, another example will be shown.

The dehydration form of the forced dehydration sections B, C, and D can be freely changed, such as one type or a suitable combination of multiple types.

Various types or configurations can be used to supply the material to be processed to the gravity dewatering section A, and these are collectively referred to as a device 3 for supplying the material to be processed.

The material of the scrapers 9a and 9b can be selected from plastics such as vinyl chloride and polypropylene, or other suitable materials.
As for the connecting structure of a and 9b to the mounting members 12a and 12b, other suitable structures can be used, such as making the long hole 15 described above into a hollow hole, a long hole shape, or a hollow hole-like notch.

The number of push bolts 18, the mounting configuration, etc. can be selected as appropriate.

The object of dehydration treatment and the purpose of treatment may be any.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a schematic overall view of the dewatering device, Figure 2 is a side view with some of the main parts omitted, and Figure 3 is a front view with some of the main parts omitted. It is a diagram. FIG. 4 is a partially omitted side view showing the main parts of the conventional example. 3... Processing material supply device, 6, 7... Filter cloth, 9
a, 9b...Scraper, 12a, 12b...Mounting member, 14...Coil spring, 13...Fixed frame, 23...Nut, 25...Bolt,
A... Tension adjuster, P... Shaft core, 18... Push bolt, A... Gravity dehydration section, B, C, D... Forced dehydration section.

Claims (1)

[Scope of utility model registration request] Endless band-shaped filter cloths 6 and 7 are provided in a state of rotation from the gravity dewatering section A to the forced dehydration sections B, C, and D, and a device 3 is provided for supplying the treated part to the gravity dewatering section A. In a dewatering apparatus provided with cake peeling scrapers 9a and 9b that act on the filter cloths 6 and 7 from the forced dewatering sections B, C, and D, mounting members 12a and 12b for the scrapers 9a and 9b are provided.
is provided over the entire width of the filter cloths 6, 7, and the scraper 9 is provided over the entire width of the filter cloths 6, 7.
a, 9b are provided so as to be swingable around the axis P in the direction of distance, and the scrapers 9a, 9b
Coil springs 14, 14 that urge the mounting members 12a, 12b in a direction approaching the mounting members 12a, 14 at both ends of the filter cloths 6, 7 in the width direction are closer to the swinging tips than the mounting positions of the scrapers 9a, 9b.
A tension adjuster A consisting of bolts 25 and nuts 23 is installed between the portion 12b and the fixed frame 13, and the scrapers 9a and 9b are attached to the filter cloths 6 and 7 with respect to the mounting members 12a and 12b. The scraper 9
Push bolts 18 are arranged in parallel in the width direction of the filter cloths 6, 7 to prevent the mounting members 12a, 9b from moving away from the filter cloths 6, 7 with respect to the mounting members 12a, 12b. The mounting members 12a, 12b
The scraper mounting structure of the dewatering device installed in