JP2757178B2 - Solid-liquid separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid separation device for separating water from an object containing a large amount of water.

[0002]

2. Description of the Related Art Solid-liquid separators used for treating sludge or dredging sludge are well known. A conventional solid-liquid separation device is configured to guide an object to be treated containing a large amount of water onto a filter cloth belt, flow the water through the filter cloth belt, and collect solids remaining on the filter cloth belt. (See Japanese Patent Publication No. 61-3568).

However, in this type of solid-liquid separation apparatus, the filter cloth belt is clogged, so that high-pressure washing water is sprayed on the filter cloth belt after removing the solids to clean the filter cloth. It is necessary to prevent clogging. For this reason,
In order to use this conventional solid-liquid separation device, a large amount of washing water is required, and the running cost must be increased.

Accordingly, the present applicant fixed a plurality of fixing rings integrally with a gap therebetween, arranged a floating ring between the fixing rings, and provided a screw conveyor inside the fixing ring and the floating ring. A placed solid-liquid separator has been proposed (Japanese Patent Publication No. 7-10440). In the case of this apparatus, the object to be processed is conveyed inside the fixed ring and the floating ring by the screw conveyor, and the water of the object to be processed flows down between the rings during the conveyance. At this time, clogging of solids between the rings is eliminated by the floating of the floating ring.

[0005] As described above, the solid-liquid separation device according to this proposal has an excellent advantage that clogging of solids can be prevented. However, this device is very effective when treating organic sludge water such as food processing wastewater and sewage treatment, but when treating inorganic sludge water such as paint, plating, bentonite, etc. When the water content is increased, the solid content of the sludge water is clogged in the form of a powder inside the fixed ring and the floating ring, and there is a drawback that the sludge cannot be discharged smoothly.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a solid-liquid which can be subjected to a dehydration treatment without clogging any object to be treated, whether organic or inorganic. An object of the present invention is to provide a separation device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first and second pulleys rotatably supported, and a plurality of these pulleys which are spaced apart from each other by a small distance in the axial direction of the pulleys. A plurality of endless belts wound around the pulleys and driven to travel from the first pulley toward the second pulley; and a pressurizing rotator press-contacting an endless belt portion between the first and second pulleys. And a clogging prevention means for separating adjacent endless belt portions apart from the second pulley.

At this time, the clogging prevention means includes a first separation pulley for winding every other endless belt portion separated from the second pulley, and another one separation roller separated from the second pulley.
It is advantageous to have a second separating pulley around which every other endless belt part is wound.

In addition, the clogging prevention means has a separation pulley which winds a plurality of endless belt portions separated from the second pulley, and a gap between the endless belt portions wound around the separation pulley is reduced. It is advantageous that the distance between the endless belt portions wound around the first and second pulleys is set to be larger than that.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view of a solid-liquid separation device 50 of this embodiment, and FIG. 2 is a sectional view taken along line II-II of FIG. In these drawings, first and second pulleys 3 and 4 are rotatably supported by a pair of side plate frames 1 and 2 which are fixedly arranged apart from each other. Endless belts 5 are wound around each. The first and second pulleys 3 and 4 shown as an example in the drawing are positioned parallel to each other, and the second pulley 4 is connected to one side plate frame 1.
And the first pulley 3 is configured as a driven pulley.

The plurality of endless belts 5 wound around the first and second pulleys 3 and 4 are made of a flexible material.
For example, it has a width of about 5 mm to 10 mm. As shown in FIGS. 1 and 3, the endless belt 5 is wound around the first and second pulleys 3, 4 with a small gap G therebetween in the axial direction. . At this time, as shown in FIG. 3, a number of annular grooves 7 are formed on the peripheral surface of the second pulley 4, and each endless belt 5 is engaged with each of the grooves 7. The first pulley 3 has exactly the same configuration. In this way, the portion of the endless belt 5 between the first and second pulleys 3, 4 is maintained in a state in which each of them is spaced apart from each other by a constant distance G.

When the motor 6 operates, the second pulley 4 rotates clockwise in FIG. 2, whereby the endless belt 5 is driven to travel from the first pulley 3 toward the second pulley 4, and Pulley 3 is driven to rotate. The endless belt 5 runs while being wound around the first separation pulley 8 and the second separation pulley 9 shown in FIG.
9 will be described later in detail.

An endless belt portion between the first pulley 3 and the second pulley 4 is in pressure contact with a pressing rotary member configured as a pressing roller 10. The pressure roller 10 is also rotatably supported by the two side plate frames 1 and 2, and rotates in accordance with the travel of the endless belt 5 while being pressed against the surface of the endless belt 5. The pressure roller 10 shown as an example in the drawing is located parallel to the first and second pulleys 3 and 4.

As shown by an arrow X in FIG.
The paper is fed between the first pulley 3 and the pressure roller 10 and between the pressure roller 10 and the endless belt 5. This sludge water has flocs formed by the coagulant mixed therein beforehand, and many flocs float in the water. The water content of the sludge water before the treatment is usually about 99% by weight.

As described above, the sludge water A is driven by the endless belt 5 driven to travel and the pressure roller 10 driven and rotated.
The sludge water is supplied to the pressure roller 10
And the endless belt 5, the water in the sludge water is squeezed out.
As shown by, it flows down through the gap between the endless belts 5. The remaining solids B are discharged from between the pressure roller 10 and the endless belt 5, then scraped off from the endless belt 5 and the surface of the second pulley 4 by the scraper 11, and fall downward as indicated by the arrow W. I do. The water content of the solid content B at this time is, for example, 97 to 95% by weight or less.

The moisture content of the solid content is determined by the width of each endless belt 5,
It can be changed by adjusting the interval G between the belts 5, the driving speed of the endless belt 5, and the pressing force between the pressure roller 10 and the endless belt 5. Usually, the gap G between the endless belts 5 is set to about 0.1 mm to 2 mm, preferably about 0.5 mm to 1 mm.

As described above, according to the solid-liquid separation device 50 of the present embodiment, an object to be treated such as sludge water is pressurized between the plurality of endless belts 5 and the pressure roller 10 pressed against the belts. ,
Since the water is allowed to flow down from between the endless belts, even if the dehydration rate of the processing object is increased, the solid content does not clog, and regardless of the inorganic or organic processing object, Can also be subjected to a dehydration treatment. In other words, not only dewatering treatment of organic sludge water such as food processing wastewater and sewage treatment material, but also wastewater containing a large amount of inorganic substances, collection of paint in the coating water washing booth, dewatering of plating sludge water, and construction of bentonite It can be widely used for soil dewatering and sludge dredging.

By the way, the water in the sludge water A shown in FIG. 1 flows down from between the endless belts 5, but if solids are clogged in these gaps, it becomes difficult for the water to flow down and the dewatering function is reduced. descend.

The solid-liquid separation device 50 shown in FIG.
A clogging prevention means 20 for separating adjacent endless belt portions apart from the second pulley 4 is provided. The clogging prevention means 20 of the present example includes the above-described first separation pulley 8 and the second separation pulley. It has a pulley 9. The specific configuration will be described below.

The first and second separation pulleys 8 and 9 are also rotatably supported by the side plate frames 1 and 2 in a state where they are positioned in parallel with each other.
Every other endless belt portion separated from the second pulley 4 is wound. Similarly, every other endless belt portion separated from the second pulley 4 is wound around the second separation pulley 9. That is, as shown in FIG. 1, the endless belt portions hung on the first and second pulleys 3 and 4 are adjacent to each other at a predetermined interval, but the other endless belts are denoted by reference numeral 5a. , The other endless belts are denoted by reference numeral 5b to identify them, and the former is referred to as a first belt group 5a and the latter as a second belt group 5b.
The first belt group 5a is wound around the first separation pulley 8, as shown in FIGS. 2 and 4, and the second belt group 5b is wound around the second separation pulley 9. The first belt group 5a is not wound around the second separation pulley 9, and the second belt group 5a
b is not wound around the first separation pulley 8. Also in this case, a plurality of annular grooves are formed on the peripheral surface of each of the separation pulleys 8 and 9, and the belts of each belt group are fitted into these. The belt portions separated from the first and second separation pulleys 8 and 9 are wound around the first pulley 3 as described above.

As described above, every other endless belt 5 separated from the second pulley 4 is connected to the other first belt group 5a and the other one.
Since it is divided into every second belt group 5b, and each is wound around separate first and second separation pulleys 8 and 9,
As can be seen from FIG. 2, these belt groups 5a and 5b are largely separated from each other. The endless belts adjacent to each other are separated from each other. For this reason, even if solids are clogged between the endless belts 5 during the dewatering of sludge water, when the adjacent endless belts are separated from each other, the clogged solids naturally fall down, and clogging naturally occurs. Will be resolved. The endless belt portion in which the clogging has been eliminated in this manner is again wound around the first pulley 3, and then the sludge dewatering operation is performed as described above, thereby increasing the dewatering efficiency.

As described above, the clogging can be eliminated naturally without performing a special clogging treatment, and a complicated and uneconomical cleaning operation using a large amount of washing water is unnecessary. Moreover, the clogging prevention means 20 has a simple structure,
It can be configured at low cost.

The endless belt 5 may be of various cross-sectional shapes. In addition to the V-belt shown in FIG. 5A, the endless belt 5 may have a circular cross-section as shown in FIG. A belt or a belt having a rectangular cross section as shown in FIGS.

The solid-liquid separator 100 shown in FIGS. 6 and 7
The anti-clogging means 30 also eliminates clogging by separating the endless belt portions adjacent to each other away from the second pulley 4, but the clogging preventing means 30 shown here is Has one separation pulley 12 around which a plurality of endless belt portions separated from the pulley 4 are wound. All the endless belts 5 are wound around the separation pulley 12. The separation pulley 12 is also rotatably supported by the two side plate frames 1 and 2 (FIG. 1). Clogging prevention means 3 of solid-liquid separation device 100 shown in FIGS. 6 and 7
The configuration other than 0 is the same as the solid-liquid separation device shown in FIGS. 1 to 3.

Here, the separation pulley 12 shown in FIG. 7 is also formed on its peripheral surface with annular grooves 13 with which the endless belts 5 are engaged. 3 is wider than the interval between the annular grooves 7 formed on the peripheral surfaces of the first and second pulleys 3 and 4. That is, the interval G ₁ between the endless belt portions wound around the separation pulley 12 is larger than the interval G between the endless belt portions wound around the first and second pulleys 3 and 4 (see FIG. This is set to be larger than 3). For this reason, when the endless belt portion that has left the second pulley 4 is hung on the separation pulley 12, the adjacent endless belt portions are greatly separated from each other. For this reason, even if solids are clogged between the endless belts at the time of the dewatering treatment of the sludge water, the solids fall from between the endless belts that are widely separated and fall downward. Thus, also in this case, the clogging can be naturally eliminated without using the washing water, and the endless belt with the clogged eliminated is wound around the first pulley 3 again, and then the sludge is efficiently removed. A water dehydration operation can be performed. Clogging prevention means 30 shown in FIG.
Since only one separation pulley 12 needs to be used, the configuration can be particularly simplified.

The separation pulley 1 shown in FIGS.
The interval G ₁ between the endless belts 5 wound around the second
Since the distance G between the endless belts 5 wound around the pulleys 4 is larger than that of the endless belts 5, the separation pulleys 12 are disposed in the longitudinal direction as shown in FIG. It is formed in a drum shape so that its diameter decreases toward the end.

The dewatering efficiency can be increased by increasing the distance G between the endless belts 5 during the dewatering process in each of the embodiments described above. May fall. For this reason, the interval G between the endless belt portions between the first and second pulleys 3 and 4 cannot be made too large. Therefore, for example, only the solid-liquid separators 50 and 100 described above are used to convert sludge water having a water content of 99% by weight before treatment.
Solids with very low moisture content, eg 60-70% by weight
It may be difficult to obtain a solid content having a water content of

In such a case, as shown in FIG.
Concentrator 17 known per se, preferably 7-10
It is preferable to use the concentrator disclosed in Japanese Patent Publication No. 440 together with the solid-liquid separation devices 50 and 100 described above. That is, as shown in FIG. 9, the raw water P and the flocculant Q of the sludge water are put into the mixing tank 15, and the mixture is stirred by the stirrer 16, and the resulting sludge water A having a water content of 99% is concentrated. By means of the apparatus 17, for example, it is concentrated to a water content of 85 to 90% by weight, and then it is concentrated to the solid-liquid separation device 50 or 1 described above.
00 to obtain a solid content B having a water content of about 60 to 70% by weight. By doing so, the dewatering rate of the sludge water can be increased without any problem.

[0030]

According to the solid-liquid separation apparatus of the first aspect, any object to be treated can be efficiently dewatered regardless of whether it is an organic or inorganic substance. Moreover, clogging can be eliminated naturally, and complicated and uneconomical cleaning work can be eliminated.

According to the solid-liquid separation device of the second aspect,
The clogging prevention means can be configured with a simple configuration.

According to the solid-liquid separation device of the third aspect,
In particular, the clogging prevention means can be configured with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a plan view of a solid-liquid separation device according to an embodiment of the present invention, in which sludge water, a solid content after treatment, a scraper, and the like are omitted.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, with additional elements omitted in FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III of FIG. 2, in which illustration of solid components is omitted.

FIG. 4 is a view as seen in the direction of arrow IV in FIG. 2;

FIG. 5 is a cross-sectional view of various endless belts.

FIG. 6 is a view similar to FIG. 2, showing another embodiment.

FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. 6;

8 is an overall view of the separation pulley shown in FIG.

FIG. 9 is an explanatory view in which a solid-liquid separation device is combined with another concentrator.

[Explanation of symbols]

3 first pulley 4 and the second pulley 5 the endless belt 8 first isolation pulley 9 second isolation pulley 12 separate pulley 20 clogging prevention means 30 clogging prevention means 50 the solid-liquid separation device 100 solid-liquid separator G gap G ₁ interval

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 33/04 C02F 11/12

Claims (3)

(57) [Claims] 1. A first and a second pulley rotatably supported and wound around these pulleys at a small interval from each other in the axial direction of the pulleys. A plurality of endless belts driven to run toward the pulleys; a pressure rotating body that presses against an endless belt portion between the first and second pulleys; and endless belt portions adjacent to each other and separated from the second pulley. A solid-liquid separation device comprising: 2. The method according to claim 1, wherein the clogging prevention means includes a first separation pulley for winding every other endless belt portion separated from the second pulley, and another every other endless belt separated from the second pulley. The solid-liquid separation device according to claim 1, further comprising a second separation pulley around which the belt portion is wound. 3. The clogging prevention means includes a separation pulley that wraps around a plurality of endless belt parts separated from the second pulley, and a gap between the endless belt parts wrapped around the separation pulley is set. 2. The solid-liquid separation device according to claim 1, wherein the distance between the endless belt portions wound around the first and second pulleys is set to be larger than the distance between the endless belt portions.