JPS6084119A - Solid-liquid separating apparatus - Google Patents

Abstract

PURPOSE:To obtain the titled apparatus reduced in a dimension and having high efficiency, in a filter cloth running type filter or dehydrator, by separating the flooded water of high pressure washing water sprayed from the back surface of filter cloth after filtration or dehydration from backwashing water. CONSTITUTION:The greater part of the liquid component of a solid-liquid mixture supplied onto filter cloth 1 from the tank 9 of a filter cloth running type filter is passed through the filter cloth 1 and discharged from the pipe 14 of a seal box 13 through a receiving tank 11. On the other hand, the unfiltered component remains on the surface of the filter cloth 1 in semi-flowable state and recovered in a receiving tank 20 by backwashing water injected from a recovery nozzle 15. The filter cloth 1 is drained by a roll 7 and washed from the back surface thereof by the filtrate in a pot 13 injected from a washing nozzle 21 and drained by a roll 8 to be again subjected to filtration. A part of the filtrate injected from the nozzle 21 is flowed out from both side ends of the filter cloth 1 to form flooded water while the remainder passes the filter cloth 1 to be brought to backwashing water. Relatively purified flooded water is flowed into the receiving tank 20 and refluxed to the pot 13. On the other hand, backwashing water relatively high in the concn. of the solid component is collected in a receiving tank 27 and sent to the tank 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid-liquid separation device, and more particularly to a solid-liquid separation device generally referred to as a filter cloth traveling type filter or an ilμ cloth traveling type dehydrator.

In recent years, filter cloths have been developed in which a raised AA layer is formed by implanting Chikushigumi on the surface of a textile base material so that it slopes in one direction, or a raised filter layer is formed by directly raising the textile base material. It was done. Along with this, such a 4F filter cloth is processed into an endless one, and the endless filter 11 is provided so as to run in one direction and freely once, and a solid liquid is supplied to the surface of the filter cloth to remove the particles contained in the solid liquid. The so-called 11 traveling type filtration machine and the 1;2 water machine (hereinafter collectively referred to as the solid-liquid 1t!I device) have been developed to separate solid and liquid components. There is. In such a solid-liquid separator, in order to increase the efficiency of solid-liquid separation by 1'i, the components after filtration or dehydration are
After collecting the filter cloth from the soil, high-pressure water is blown onto the back side of the filter cloth to remove clogging substances, and a primary turning cycle of 8 m fli is achieved.

Spray high-pressure cleaning water from the back side of the wave cloth (1'
Even with IJ, not all of it passes through the filter cloth, but some of it flows out from both sides of the filter cloth.This so-called vA warm running water does not contain a lot of solid components. On the other hand, the backwash water that has passed through the wave cloth contains a relatively large amount of solid components because the clogging substances are removed during the passage. However, conventional solid-liquid separators cannot separate these hot flowing water and backwash water.
H(B) is recovered, and the solid component is removed again using 1 m'A F? However, the efficiency is low and the equipment becomes large.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional solid-liquid separating device, to separate and recover the overflow water and backwash water, and to provide a solid-liquid separating system with a compactness of 1 to 1 and an efficiency of 13. To provide a liquid separation device.

In order to achieve the above object, J3 of the present invention includes an endless filter cloth provided so as to be able to run and circulate in one direction, a solid-liquid supply section provided opposite to the surface of the filter cloth, and the above-mentioned A filtration filter 1 installed on the back side of the filter cloth and upstream of the solid-liquid supply section in the running direction of the filter cloth, and a washing water nozzle below the filtration 11 and the water nozzle. 92 [pu IC
It has a raw water receiving tank and a backwash water receiving tank 4C1, and the solid-liquid water receiving tank 4C1 is located below both ends of said method D. A separation device 5' is provided.

To explain one embodiment of the solid-liquid separator of the present invention, FIG. 1 shows a so-called filter cloth type filtration system.
JJ% is a schematic side view.

In FIG. 1, 1 is tensioned between a drive roll 2 and four guide rolls 3.4.5.6, and these drive rolls 2 and blade rolls 3.4.5.6; Endless crawler II that runs and circles in the direction of the arrow on a fixed trajectory regulated by drain rolls 7.8, which will be described later.
'P is there. This filter 1 is stretched from the blade 1 - 6 to the drive 1 - 2 at a slightly upward angle θ with respect to the horizontal plane. This angle θ
In order to make the liquid depth in the solid liquid supply tank 9 as shallow as possible and to increase the contact area between the solid liquid and the filtration 1, the depth is in the range of 5 to 20 degrees. That's very appropriate.

9 [Yo, between guy 1 to roll 6 and drive [j-role 2-(,
A solid-liquid supply tank (solid-liquid supply section) is provided on the surface side of the filter cloth 1.The tension angle θ of the filter cloth 1 is such that the depth of the solid-liquid supply ψ9 is equal to In order to prevent the leakage of η and C hardness, it is preferable that the range is from 5 to 20'.

1σ\ where the filter cloth 1 is sandwiched and faces the solid-liquid supply tank 9.
In other words, the back side of the filter cloth 1 is connected to an intake fan (not shown) via the intake air D10, and the back side of the filter cloth 1 is connected to an intake fan (not shown) for a distance of 500 m.
A filtrate receiving tank 11 is provided which can maintain a reduced pressure of n+ water columns or more. The filtrate receiving tank 11 is connected to a seal pot 13 for maintaining a constant degree of pressure reduction in the filtrate receiving tank 11 via a piping 12 for discharging the filtrate. Reference numeral 14 designates discharge pipes provided in the seal bottles 1 to 13 for discharging the filtrate collected in the filtrate receiving tank 11.

Between the drive roll 2 and the guide roll 3, that is, 118
In the running direction of the cloth 1, the solid-liquid supply 4 fl 9 J,
On the downstream side of the filter, a spray-type water nozzle 15 for recovering non-filtered components (hereinafter referred to as a recovery nozzle) is provided so as to face the surface of the filter cloth 1 . Also, from the back and side of filter cloth 1,
．． 5 to 5 cm digit 1 (1, and - G collection nozzle 15
An anchor cloth presser plate 16 is provided at a position facing the anchor cloth presser plate 16. This door cloth presser plate 16 is made of metal or resin, and is processed into the shape of a flat QS3 perforated plate as a whole, but both edges of the door cloth presser plate 16 will not be damaged even if it comes into contact with the running filter cloth 1] It is bent as shown in Figure 1 to prevent it from falling.

Below the recovery nozzle 15, a non-filtered component receiving tank 20 is provided which is connected to the recovery nozzle 15 through a pipe 19 having a discharge pipe 17 and a pump 18.

A draining roll 7.8 is provided between the guide rolls 3 and 4 and between the kite rolls 4 and 5 so as to come into contact with the surface of the filter cloth 1 and push the filter cloth 11 upward.

Therefore, the filter cloth 1 runs smoothly up and down between the guide rolls 3 and 5.

A filter cloth 1 is provided between the guide roll 4 and the drain roll 8.
A filter cloth cleaning water nozzle (hereinafter referred to as a cleaning nozzle) 21 is provided opposite to the back surface of the filter cloth.

As shown in FIG. 2, the cleaning nozzle 21 is made of a tube having a plurality of spray holes in its longitudinal direction, and is arranged so that its longitudinal direction is in the width direction of the filter cloth 1. The cleaning nozzle 21 is connected to the seal bottles 1 to 13 by a pipe 23 equipped with a pump 22. Further, on the surface side of the filter cloth 1 facing the cleaning nozzle 21, a presser plate 24 similar to that described above is provided.

Note that the recovery nozzle 15 mentioned above may also be constructed in the same manner as the cleaning nozzle 21 described above.

Washing nozzle 21 J> J: Below the filter cloth 1, there is a backwash water receiving tank 27 connected to the non-filtered component receiving tank 20 by a color scheme 26 equipped with a pump 25, and a pipe 28 connected to J...
The overflow water receiver 4f connected to the above-mentioned sheet holder 13!
+29 is 8 hubbed. The backwash water receiving tank 27 is the second
As shown in the figure, almost the entire effective width of the filter cloth 1 is covered with water. It is located at and below r+B.

Now, to explain the operation of the above-mentioned filter, solid liquid is supplied onto the filter cloth 1 from the solid liquid supply tank 9.

Most of the liquid components in the supplied solid-liquid pass through the filter cloth 1 due to gravity and the reduced pressure applied to the filtrate receiver m11, and the filtrate receiver jA! It will be collected within 11. The liquid components collected in the filtrate receiving tank 11 are transferred to the seal box 1.
The filtration is discharged to the outside through the discharge pipes 14 of .about.13. on the other hand,
The so-called non-filtered components, which have not exceeded the filter cloth 1), remain on the surface of the filter cloth 1 in a semi-liquid state. Umari,)
IX3 is reduced.

As the filter cloth 1 circulates, the non-filtered components reach the recovery nozzle 15, and are injected from the 1-liter collection nozzle 15 into the non-filtered components in a semi-fluid state in the non-filtered component receiving tank 20. J2 is recovered from the surface of the filter cloth 1 and collected in the non-filtered component receiving tank 20. Nowadays, the filter cloth presser plate 16 is
This prevents the filter cloth from being damaged by the non-filtered components sprayed from the recovery nozzle 15. Non-filtered component receiving tank 2
The non-filtered components recovered in the filter 0 are discharged to the outside of the filter via the discharge pipe 17, and a portion is used for the next recovery operation.

The filter cloth 1 is then attached to the surface by a draining roll 7 1)
The liquid component flowing out is squeezed out, and the liquid component reaches the cleaning nozzle 21 and is washed from the large surface side of the C by the filtrate in the sealbot 13 that is sprayed from the cleaning nozzle 21. At this time, the can cloth presser plate 24 is similar to the filter cloth presser plate 16 described above.
The filter cloth 1 is prevented from being greatly bent by the filtrate sprayed from the cleaning nozzle 21. The filter cloth 1 then reaches the position of the draining roll 8, where the liquid component on the surface due to washing is removed, and then the filter cloth 1 is subjected to filtration again.

Top 1. Part of the filtrate that is injected from the nozzle 21 on J5 flows out from both ends of the filter cloth 1 and becomes overflow water, and the rest passes through the all cloth 1 and becomes backwash water. becomes.

The relatively clean overflow water is then collected at both ends 131 of the filter cloth 1.
FAt person is placed in the overflow water receiving tank 29 located below S, and the Seal Bot' is supplied via the piping 28. It is refluxed to 3.

On the other hand, the backwash water that has passed through the filter cloth 1 and is accompanied by clogging components and has a relatively large amount of solid components is collected in the backwash water receiver 1e+ 27, and is pumped by the pump 25 through the color scheme 26. The non-excess component is sent to a receiving tank 20.

”-5 Miokafu is 1 word, 1 upper piece 1111Ei! ,
v 7 93 b No. 91 Mei ■ 1 book and patent application 1984-22
6384111] It is preferable that it is as described.

That is, at least the weft yarns arranged in the longitudinal direction (circulating direction) of the filter 1) have a single yarn diameter of 0, 1.
Using a knitted fabric or woven fabric base material using multi-filamen 1, which is a multi-filament yarn containing ~10μ, the wefts, mainly the weft yarns, of these four bases are raised in the longitudinal direction jj, and a thickness of 0 is applied to the surface of the filter 1j.
．． It is formed by forming a vertical filter made of ultrafine fibers of 1 to 10 μm.

In such a filter cloth, the naps are oriented 1-14 in the longitudinal direction of L, so the naps lie in the above direction (9, that is, the naps have directionality. , Stretch the filter cloth so that the nap is facing in the opposite direction to the 1F 1) direction of the filter cloth. <Rd), 2. Hole belts for driving sea urchins are sewn to both ends of the door cloth, as shown in FIG.

The recovery nozzle may be used to inject purified water, but as shown in the embodiment, it may be used to inject the non-filtered components in the non-filtered component receiving tank. This is preferable because it does not dilute the non-filtered components and reduces processing costs. Depending on the +II state of the solid state, it is also possible to use the solid liquid itself supplied to the solid liquid supply tank. Further, the collection nozzles may be installed in multiple stages in the longitudinal direction of the filter cloth. In that case, the non-filtered component receiving tank is divided into a plurality of compartments corresponding to each collection nozzle, and the corresponding collection nozzle and compartment are connected to each other via a pump.
If connected, more detailed collection operations will be possible. In addition, instead of the collection nozzle, it is possible to provide another collection means instead of providing a scraper that comes into contact with the filter cloth. In addition, if the non-filtered components are easily peeled off and fallen off the filter cloth, there is no need to intentionally set up a recovery means.1 Even if the cleaning nozzle is one that uses clean water, Alternatively, the cleaning nozzles may be installed in multiple stages in the running direction of the filter cloth. Also, the cleaning nozzles may be operated continuously or at desired intervals depending on the state of dirt on the filter cloth. The filter cloth may be operated for a desired period of time.Although it is not necessarily necessary to run the filter cloth in a zigzag manner near the cleaning nozzle installation position (=I), it is easier to collect overflow water and backwash water. This is preferable.

Instead of installing a solid-liquid supply tank, a gutter or the like may be provided in this area to supply the solid-liquid, or a supply pipe or the like may be used to connect and discharge the solid-liquid. It's okay.

It is not necessary to use the filtrate receiving tank in a reduced pressure state, and this portion may be filtered only by gravity. However, if this is taken into account, f71'c- will be significantly improved. In addition, a vacuum filtration section is installed following the so-called gravity filtration section (2), and both are combined into 4) one stream.

In addition, it is necessary to use a filter cloth presser plate and a drainer 1:1 rule.
'b It's not a necessary twist.

In the above, one embodiment of the present invention has been explained by exemplifying a so-called filter, but the solid-liquid separator of the present invention has a drive roll provided with 24-sided and 1-j-l. Even if it is a so-called dehydrator that works in conjunction with a driving roll to squeeze out the non-filtered components of the filtrate, or that does not require a separate squeezing roll to sandwich the cloth.
:It's a bad thing.

The device of this invention can be used in a variety of applications. For example, it can be used to separate solid and liquid components contained in lake water or state water. Also,
Excess sludge generated from activated sludge treatment equipment: Sludge generated through sewage treatment, such as sludge of the so-called suspended type, and so-called fixed type sludge discharged from the biofilm treatment equipment. It can be used for filtering, concentrating, and dehydrating scum, flocs, wash water, sludge, etc.

Specifically, examples include sludge produced through water and sewage treatment, excess sludge generated from septic tanks, sludge generated from human waste treatment plants, scum from pressurized flotation operations, and industrial wastewater. It can be used to separate the solid components and liquid components contained in the backwash water of various filters, such as coagulation methods Δ, flocs, and sand filters (coagulation caused by processing). In addition, for example, paper valve manufacturing industry, food manufacturing industry, sake 328 industry, miso manufacturing industry, etc.
It can be used for solid-liquid separation in various manufacturing industries and for the recovery of valuable materials used in chemical processes, for example.

As explained above, the solid-liquid separator of the present invention includes an overflow water receiving tank and a backwash water receiving tank below the filter cloth and the cleaning nozzle provided on the back side thereof, and the overflow water receiving tank is connected to both sides of the filter cloth. Because it is installed in the lower blade at the end, the cleaning water is divided into relatively clean overflow water that flows out from both ends of the filter cloth, and relatively solid water that passes through the filter cloth and contains clogging components. It can be collected separately from the backwash water containing many components, and the amount of water that needs to be reprocessed after 4F washing is greatly reduced.As a result, the overall
JJ, j:: High efficiency. Further, unlike the conventional device 6 described above, there is no need to provide a sedimentation tank for washing water, so the device is compact.

In addition, since there is no need to separately prepare washing water for the platform in which the washing nozzle and the overflow water receiving tank are connected and the overflow water is injected from the washing nozzle, the running cost is reduced.

[Brief explanation of drawings]

The drawing shows an example of the solid-liquid separator 6 of the present invention //i! State (
Fig. 1 (,1[
11111 view with θi aspect added, second recognition mouth Cao γX
131 View of 1-1 (Yes. 1: Filter cloth 2: Drive roll 3.4.5.6: Guide roll 7.8: Draining roll 9: Solid-liquid supply tank (solid-liquid supply section) 10: Intake pipe 11: Filtrate receiving equipment 12.19.23.26.28: Piping 13: Seal pot 14.17: Discharge pipe 15: Recovery nozzle 16.24: Door cloth presser (and 18.22.25: Pump 20: Non Filtration component receiving tank 21: Washing nozzle (811 cloth washing water nozzle) 27: Backwash water receiving tank 29: Overflow water receiving tank

Claims (1)

[Claims] An endless filter cloth provided so as to be able to run and rotate in one direction, a solid-liquid supply section provided opposite to the surface of the corrugated cloth, and a solid-liquid supply section provided on the back side of the corrugated cloth and in the running direction of the filter cloth. a water nozzle for cleaning the corrugated cloth provided on the downstream side of the corrugated cloth, and an overflow water receiving tank and a backwash water receiving tank provided below the said corrugated cloth and the water nozzle; A solid-liquid separator characterized in that it is located below the end.