JPH0647047B2 - Solid-liquid separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mounts a water-permeable sheet on a belt conveyor,
Particularly, the present invention relates to the provision of a solid-liquid separation device used for continuously separating a solid-liquid containing a finely separated substance.

[Prior Art] Industrial waste liquor and various treatment liquids are discharged to rivers after removing harmful substances or pollutants contained in these liquids and neutralizing them.

After the dredging, the sludge in rivers, lakes and marshes or treatment tanks was separated from the mud and water, and the separated liquid water was returned to the rivers and the sludge was solidified and disposed of.

For such industrial effluents and dredging sludge, etc., a cylindrical dewatering device that normally uses a filter medium is filled with these effluents or dredged sludge, etc., and then depressed by pressing a press etc. toward the filter medium. Also, by filling these waste liquids or dredged sludge in a centrifugal dewatering device that has a filter medium on the peripheral surface and rotating the centrifugal dewatering device to de-squeeze, or vacuum dewatering that has a filter medium in the suction part. After the waste liquid or dredging sludge or the like has been filled in the device, the suction part is depressurized by setting a negative pressure.

[Problems to be Solved by the Invention] However, in such a conventional dehydrator, solid-liquid separation is performed under forced conditions such as some pressurization or depressurization conditions, and therefore, While the solid-liquid separation treatment is performed efficiently, the fine solids contained in the treated waste liquid or treated sludge are often not captured by the filter medium and are contained in the de-squeezed treatment liquid, and harmful substances such as rivers It was said to be the cause of pollution of rivers and the like due to polluted or suspended filth.

In addition, the separation of solid-liquid under constant forced conditions such as pressurization or depressurization naturally requires these pressurization or depressurization devices, and requires a large press machine,
A large pressure cylinder device, a large rotary cylinder device, a large vacuum device, etc. are required, and there is a disadvantage that the equipment cost is relatively high compared to the processing capacity.

Furthermore, in order to forcibly separate the solid-liquid by such pressurization or depressurization, it is necessary to apply such pressurization or depressurization to the surface of the filter medium, such as a press device. Due to the size of the filter, there is a limit to the “face” of the filter medium used for solid-liquid separation, and it is generally impossible to filter on a “wide face”, and the limited “face” of the filter medium is used. It was necessary to separate the solid and liquid.

From this point of view, the filter medium becomes clogged in the range of a relatively small unit throughput, which requires frequent replacement of the filter medium, and it is necessary to stop the device and interrupt the work each time. However, when there are many industrial waste liquids or dredging sludges to be treated, there is a disadvantage that the working efficiency is significantly reduced.

In view of the inconvenience in the conventional dehydrating devices, the solid-liquid separation device according to the present invention is a conventional large-scale device without adding a forcing force such as pressurizing or depressurizing industrial wastewater or dredging sludge. In addition to performing natural filtration with a filtration medium under atmospheric pressure conditions, the filtration medium itself is moved so that the filtration surface is not changed over time, the filtration efficiency of the filtration medium is increased, and it is captured by the filtration medium. The purpose is to perform continuous dewatering of industrial wastewater or dredged sludge by removing the solid wastes, etc., as needed.

[Means for Solving the Problem] In order to achieve such an object, the solid-liquid separating device according to the present invention provides a belt conveyor-like separating device A in the invention of claim 1. , The belt 1a of the belt conveyor section 1 of the separating apparatus A, and the water-permeable sheet 1a ', and the belt 1a
The water permeable sheet 1a 'is loosely stretched on the width side of the belt conveyor section 1. Further, the belt conveyor section 1 of the separating device A
Has at least a horizontal portion 1'and a rising inclined portion 1 "that is continuous with the horizontal portion 1 ', and at least one horizontal portion 1'of the horizontal portion 1'has a concave shape for the treatment liquid. It is configured as a reservoir 2.

Next, in the invention of claim 2, the structure of the belt conveyor section 1 of the separating device A is configured by a pair of roller chains 3 and 3 stretched in parallel, and the water permeable sheet 1a loosely stretched between the roller chains 3 and 3. 'And the reversing rollers 4 and 4 of the water permeable sheet 1a' provided at the reversing positions of the belts 1a at both ends of the belt conveyor unit 1, and further, the roller chains 3 and 3 are It is arranged laterally of the reversing roller 4 and is biased toward the axis of the reversing roller.

[Operation] The solid-liquid separation device according to the present invention has the above-described structure, in particular, the water-permeable sheet 1a ′ is stretched as the belt 1a of the belt conveyor unit 1, and the water-permeable sheet 1a ′ is Since it is stretched loosely on the width side of the belt conveyer unit 1, when industrial wastewater, dredging sludge, etc. are put on the surface of the water permeable sheet 1a ', the water permeable sheet 1a' goes downward in a gutter-like shape. Recessed reservoir 2 for storing the processing liquid water
Is produced in the horizontal portion 1 '.

Further, in this way, the water-permeable sheet 1a ′ has the belt conveyor unit 1
Since it is stretched loosely on the width side, the sludge and the like taken into the water permeable sheet 1a 'will not fall from the separator A even in the inclined portion 1 ".

Furthermore, since the water-permeable sheet 1a 'is loosely stretched on the width side of the belt conveyor unit 1, the water-permeable sheet 1a' which is reversed and in the returning direction has its center portion "slack" downward.
Then, the dirt and the like trapped in the water permeable sheet 1a 'are dropped to eliminate the clogging of the water permeable sheet 1a'.

Furthermore, at both ends of the belt conveyor unit 1, reversing rollers 4,
4 and the roller chains 3 and 3 are stretched at a position lateral to the reversing rollers 4 and 4 and biased toward the shaft center side of the reversing rollers 4 and 4. The reservoir 2 can be easily formed by the sheet 1a ′,
In addition, the trapped sludge is surely released at the reversal portion.

[Embodiment] A typical embodiment of the separation apparatus A according to the present invention will be described below with reference to the accompanying drawings.

First, the belt conveyor unit 1 is mounted on the lower horizontal unit 1 ′, the upper horizontal unit 1 and the horizontal units 1 ′, 1 by using an appropriate mount 5.
It is configured as a rising slope portion 1 ″ that connects between the two, and on both sides of the belt conveyor portion 1, reversing rollers 4, 4 such as spherical rollers are arranged.

Next, the belt conveyor unit 1 includes a pair of roller chains 3, 3 provided in parallel with each other, and a driving sprocket wheel 6a, a driven sprocket wheel 6b, and a tension gear 7
It is installed between ~ 7, and this installation roller chain 3,3
Is disposed on the side of the reversing rollers 4 and 4, and is mounted on a sprocket wheel 6 having a smaller diameter than the reversing rollers 4 and 4.

Next, between the roller chains 3 and 3, the water permeable sheet 1 that loosely constitutes the belt 1a so as to "slack" downward
A'is stretched and a reservoir 2 is formed on the lower horizontal portion 1 '.

In addition, the same concave portion 2'is also formed on the inclined portion 1 "and the upper horizontal portion 1.
In addition, the reversing roller 4 extends outward of the water permeable sheet 1a 'corresponding to the "slack" of the loosely laid water permeable sheet 1a'.

Further, the water permeable sheet 1a 'which constitutes the belt 1a of the belt conveyor section on the inversion side is the loosely stretched "slack".
Corresponding to the amount, a slanting state is created with the trapping surface of sludge or the like facing downward, and sludge or the like adhering to this water permeable sheet 1a ′ is dropped efficiently.

Next, the carrier rollers 8 to 8 are arranged on the lower surface side of the water permeable sheet 1a 'constituting the belt 1a so as to support the water permeable sheet 1a' and to smoothly drive the chain of the water permeable sheet 1a '. There is.

In addition, by providing water absorbing rollers 9 to 9 such as a sponge roller and dewatering rollers 10 to 10 which are in pressure contact with the water absorbing rollers 9 to 9 together with the carrier rollers 8 to 8, the inclined portion 1 ″,
The water permeable sheet 1a 'in the upper horizontal part 1 is dehydrated.

Further, a receiver 11 is provided below the carrier rollers 8 to 8 to capture the filtered liquid water.

Furthermore, a heating or dehumidifying device 12 is provided on the upper horizontal part 1,
Further, a deodorizing device 14 is provided in a duct 13 having a vacuum device.

Further, a hopper 15 is prepared from below the reversing roller 4 to the reversing side of the belt 1a of the belt conveyor unit 1.
The cake B such as sludge captured by the water permeable sheet 1a 'is dropped onto the sheet.

In addition, the cleaner brush 16 or the like is attached in a pressure contact state so as to come into contact with the lower surface of the water-permeable sheet 1a ′ constituting the belt 1a on the hopper 15, and the sludge or the like adhering to the water-permeable sheet 1a ′ is forced. remove. The cleaner brush 16 may rotate by contact pressure with the water permeable sheet 1a ′, may be driven by the cleaner brush 16 itself, or may be another device such as a vibration. .

Incidentally, C is a treatment liquid, which is introduced from the pipe 17 into the reservoir 2 of the lower horizontal portion 1 '.

Further, 18 is a drive motor for the sprocket wheel 6a, 19 is a pivotal support of each device of the lower horizontal part 1 ', the inclined part 1 ", and the upper horizontal part 1, and 20 is a tension adjusting tool of the belt conveyor. .

The solid-liquid separation device A according to the present invention has a characteristic structure as described above, and the size of the device and the rotation speed of the belt 1a can be dealt with in accordance with the difference in the properties of the treated liquid water such as industrial wastewater and dredging sludge. By changing the water-permeable sheet 1a ′ constituting the belt 1a and the water-permeable sheet 1a ′, it is possible to filter the treatment liquid of any property.

In particular, the water-permeable sheet 1a 'can be used from coarse mesh-like sheets to thick filter cloths like micro filters. Further, a strong mesh fabric and a thin and fine non-woven paper or non-woven fabric may be used in an overlapping manner. Further, an adsorbent such as a heavy metal may be interposed between the non-woven fabrics.

In the solid-liquid separation device A according to this embodiment, the liquid content of the processing liquid C is permeable sheet by simply putting the processing liquid C into the lower horizontal part 1'of the belt conveyor part in a driven state. 1A 'permeates downward, solids are adhered to the surface of the sheet 1a', and the inclined portion 1 "and the upper horizontal portion 1 further remove the liquid contained in the water-permeable sheet 1a ', and the cake B
Is semi-dried. In this state, the reversing roller 4 strongly projects the water permeable sheet 1a 'outwardly, so that the cake B adhered to the water permeable sheet 1a' is surely separated from the water permeable sheet 1a 'and placed in the hopper 15. Since the water-permeable sheet 1a 'is dropped, the clogging of the water-permeable sheet 1a' does not always occur, and continuous treatment of the treatment liquid is possible.

[Effects] The solid-liquid separation device A according to the present invention is capable of reliably capturing even ultrafine substances contained in industrial wastewater, dredging sludge, etc. because of its characteristic structure. No pollution by toxic substances or pollution of rivers by suspended substances will occur.

In addition, since the cake etc. captured by the water permeable sheet are always removed efficiently at the reversing part, it is possible to continuously perform filtration on a good filtration surface that is not in a clogging state. Efficient industrial wastewater, dredging sludge, etc. can be treated.

In addition, by adjusting the rotation speed of the belt conveyor, adjusting the width and length of the belt conveyor, and changing the permeable sheet material that makes up the belt conveyor, in response to changes in the amount of treated wastewater, differences in properties such as dredging sludge, etc. It is possible to respond easily and surely.

[Brief description of drawings]

FIG. 1 is a side view of an essential part of a solid-liquid separation device according to the present invention, FIG. 2 is a configuration diagram showing the essential part by breaking it, and FIG. 3 is a sectional view of an essential part of a lower horizontal part, and FIG. The figure shows the cross-section of the main part of the inclined part, No. 5.
The figure is a cross-sectional view of an essential part of the reversing roller portion. 1 ... Belt conveyor section, 1a ... Belt, 1a '... Water-permeable sheet, 1' ... Lower horizontal section, 1 ″ ... Inclined section, 1
...... Upper horizontal part, 2 …… Storing part, 3 …… Roller chain, 4 …… Reversing roller, 5 …… Stand, 6 …… Sprocket wheel, 7 …… Tensioning gear, 8 …… Carrier roller, 9 …… Water absorption roller, 10 …… Dehydration roller, 11 …… Receiving, 12 …… Heating or humidifying device, 13 …… Duct, 14 …… Deodorizing device, 15 …… Hopper, 16 …… Cleaner brush, 18…
… Drive motor, 19… Pivot, 20… Tension adjustment tool.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C02F 11/12 D 7824-4D

Claims (2)

[Claims] 1. A belt conveyor-shaped separating device having at least a horizontal part and a rising slope part continuous with the horizontal part, wherein the belt of the belt conveyor part of the separating device is composed of a water-permeable sheet. Along with this water-permeable sheet is stretched loosely on the width side of the belt conveyor section, and at least one horizontal section of the belt conveyor section is a concave reservoir of the input processing liquid, characterized in that . 2. A belt conveyor section of a separating device, a pair of roller chains stretched in parallel, a water-permeable sheet loosely stretched between the roller chains, and belt reversal positions at both ends of the belt conveyor section. And a roller for reversing a water-permeable sheet provided on the roller chain, the roller chain being stretched laterally of the reversing roller and biased toward the axis of the reversing roller. The solid-liquid separator according to claim 1.