JPH07110324B2 - Continuous solid-liquid separation device and method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for separating granular solid matter mixed with a liquid, such as synthetic fiber raw material chips, synthetic resin pellets, chemicals, processed foods, etc., from a liquid such as water. Continuous solid-liquid separator used and its
Regarding the method .

[0002]

BACKGROUND OF THE INVENTION Various centrifuges are used to separate particulate solids from a mixture of the aforementioned particulate solids and a liquid.

[0003]

The above-mentioned centrifuge has the following problems.
It has a mechanical rotating part and requires a complicated mechanism for continuous solid-liquid separation. Therefore, the separation of the solid-liquid has problems such as contamination of the treated material, safety, and economical efficiency. The present invention has been made for the purpose of solving such a problem.

[0004]

The present inventor has completed the present invention as a result of efforts to develop a continuous solid-liquid separation device having a simple structure without a mechanical rotating part. Means for solving the problems will be described with reference to the drawings illustrating the present invention.
1 is a schematic plan view of the continuous solid-liquid separation device of the present invention, FIG. 2 is a schematic view of the AA ′ cross section of FIG. 1, FIG. 3 is a perspective view showing an example of the screen main body 1, and FIG. It is a section explanatory view of a screen main part.

In the continuous solid-liquid separation apparatus of the present invention, a passage is provided which connects the raw material supply port 9 to the separated solid product extraction port 10 in a zigzag shape, and one portion of which is constituted by a screen 4. 8 is formed. A gas is blown into the passage 8 to separate the liquid from the solid-liquid mixture in the passage 8 through the screen, and the remaining solid matter is forwardly fed toward the outlet.

The structure will be described. The continuous solid-liquid separation device of the present invention is formed by aligning a plurality (N) of troughs 3 having a screen 4 portion parallel to the axis in parallel and joining the edges 5 of adjacent troughs. Wavy screen body 1
And a plurality of (N or N ± 1) gutters 6 having almost the same width as the gutter 3 and having no screen are aligned in parallel,
There is a wavy cover portion 2 formed by joining edges 7 of adjacent gutter-shaped bodies. With this screen body 1 on your back,
With the cover portion 2 lying down, the gutter-shaped bodies 3 and 6 are aligned in the alignment direction so as not to exceed the width of the gutter-shaped bodies 3 or 6 and face each other without direct contact.
Both sides of the screen main body 1 and the cover 2 facing each other are sealed by side plates 12 to form a passage 8 communicating in a zigzag shape in the alignment direction of the gutters 3 and 6. Further, a supply port 9 for the solid-liquid mixture to be separated is provided at one end of the passage 8, and a solid-material take-out port 10 for separating the liquid is provided at the other end, and a pair of the corresponding gutters 3, 6 are provided. To
A gas injection nozzle 11 parallel to the axial direction is installed in the passage 8.

Next, as a second invention, using the above continuous solid-liquid separation device, a solid-liquid mixture is supplied from a supply port 9, and air is intermittently blown into the passage 8 from each gas blowing nozzle 11, At the same time as discharging the liquid from the screen 4 together with the blown-in air to the outside of the passage 8 to separate the solid liquid,
A continuous solid-liquid separation method is provided in which the solid-liquid mixture is fed forward to the outlet 10, and these operations are repeatedly added to the solid-liquid mixture to remove the remaining solid from the outlet 10.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings.

The continuous solid-liquid separation device of the present invention separates solid-liquid by the screen 4, and the screen body 1 has a plurality (N) of troughs 3 aligned in parallel and adjacent to each other. It is a corrugated body in which the edges 5 of the trough are joined, and a screen 4 is provided in each trough 3 parallel to the axis. Usually, the gutters 3 have the same length, and the cross-sectional shape is a semicircle or a semi-ellipse. The length, size, and the number (N) of the gutters 3 are determined mainly by the processing amount, the ratio of solid-liquid, the size of granular solids to be separated, the operating conditions such as the desired dehydration rate, etc. To be The edges 5 of the adjacent gutters may be directly joined to each other as illustrated in FIG. 1, or may be indirectly joined via the elongated belt-shaped member 15. Good. The gutter-shaped body 3 has a small hole through which a solid material to be separated does not pass, and a screen 4 portion using a wire net or a comb-shaped sheave. The portion of the screen 4 is parallel to the axial direction of the gutter 3 and is usually within the range of 10/180 to 120/180 around the cross section of the gutter 3. In order to efficiently drain liquid from the solid matter and to feed the solid matter forward toward the outlet 10, it is provided on the downstream side in the traveling direction of each gutter 3 within the range of the bottom points 16 to 60/180. preferable.

The cover portion 2 facing the screen main body portion 1 and forming a passage 8 for the object to be treated together has a width substantially the same as that of the trough 3 and is N or N without the screen portion.
It is a corrugated body in which ± 1 gutter-shaped bodies 6 are aligned in parallel and the edges 7 of adjacent gutter-shaped bodies are joined. The gutter-shaped body 3 and the gutter-shaped body 6 do not need to have the same shape and the same size in cross section. For example, one gutter-shaped body may have a semicircular cross-sectional shape and the other may have a semi-elliptical shape. When the widths of both gutters are different, an elongated belt-shaped member is inserted into the shorter joint so that both gutters 3 and 6 do not come into contact with each other to block the passage 8. It can be indirectly joined and adjusted.

A range in which the screen main body 1 lying on the back and the cover portion 2 lying down do not exceed the width of the gutters 3 or 6 in the alignment direction of the gutters 3 and 6, preferably the width thereof. About half, that is, half of the wavelength of the corrugated body is shifted, and the two face each other without direct contact. The distance between the two is directly related to the cross-sectional area of the passage 8 and is determined depending on the target processing amount and the like, but normally, the positions of the opening surfaces 17 of the gutters 3 and 6 are opposed to each other. Furthermore, the screen body 1 and the cover 2
Both side portions are sealed with side plates 12 to form passages 8 communicating in a zigzag shape. A supply port 9 for the solid-liquid mixture, which is a raw material, is provided at one end of the passage 8, and a solid-material outlet 10 for separating the liquid is provided at the other end. The passage 8 has a function of a guide for moving the solid substance from the supply port 9 toward the outlet 10 while separating the liquid from the solid-liquid mixture through the screen.

Further, a gas injection nozzle 11 parallel to the axial direction is installed in the passage 8 for each pair of the corresponding gutters 3 and 6. Its position is preferably mounted upstream of the cross section of the trough 3 as shown in FIG. The gas blowing nozzle 11 may be additionally provided. This is because the gas can be efficiently blown to the solid matter in the passage 8. This gas injection nozzle 11
When the gas is blown vigorously toward the solid-liquid mixture in the passage 8, the liquid is discharged out of the passage 8 together with the gas blown from the screen 4, and the remaining solid-liquid mixture is discharged to the outlet 10. It is forwarded to. The gas to be blown is usually air, but from the viewpoint of safety, for example, nitrogen or steam can be used. It is also possible to use gases of different properties in the upstream section and the downstream section, for example. 13 is a tray for the separated liquid, and 14 is its discharge port.

The continuous solid-liquid separation device of the present invention is not always designed, manufactured and installed so that the center line of the passage 8 is horizontal. For example, a downward slope may be provided from the supply port 9 to the outlet 10. Further, a continuous drying device and a cooling device having a structure similar to that of the continuous solid-liquid separation device of the present invention can be combined and integrated.

Further, the present inventor has studied an efficient solid-liquid separation method using the solid-liquid separation device of the present invention.
As for gas, it is more efficient and preferable to intermittently (pulsively) blow a certain amount of gas, because the required amount of gas is smaller and the solid-liquid separation efficiency is higher. I found it. This method is effective for solid-liquid separation, and the second
The solid-liquid separation method according to the invention.

[0015]

EXAMPLES Next, a continuous solid-liquid separation apparatus of the present invention similar to that illustrated in FIG. 1 will be described with reference to specific examples.

Using a stainless steel plate having a thickness of 1.5 mm, a semi-circular shape having a length of 125 mm and a cross section of a radius of 50 mm, a diameter of 2 m from the bottom point to a range of 0 to 60 degrees on one side.
20 holes were formed in a staggered manner at 20 locations, and 20 gutters that were screens were manufactured. The gutters were aligned so that the screen was on the downstream side, and adjacent edges were welded to form a screen body. Similarly, a cover portion having no holes was manufactured. The screen body was laid on its back, and the screen was slid in the alignment direction of the gutters to half the width of the gutters, that is, about 50 mm toward the extraction side. Side plates were welded to the both sides to form a zigzag-shaped passage, a supply port was attached to the upstream end and the cover side of the passage, and a solid material outlet was attached to the downstream end screen main body side. Further, a gas injection nozzle parallel to the axial direction was attached to the opposite side of the screen of each gutter of the screen body to manufacture the continuous solid-liquid separation device of the present invention.

Polyethylene pellets mixed with 30% by weight of water were charged into this continuous solid-liquid separation device at a rate of 50 kg per hour from a raw material supply port. 4 at the same time from the gas injection nozzle
When air at 0 to 50 ° C. was blown in at a rate of 2 m ^{2 /} min, the water content to be mixed could be 0.2% by weight. Further, when air was intermittently blown in at a rate of 1 m ² per minute, the water content could be reduced to 0.1% by weight.

[0018]

Since the continuous solid-liquid separation device of the present invention has no mechanical rotating part, the structure is simple and the cost of the device is low. do not need. In addition, a clean product can be obtained without inclusion of lubricating oil or the like. Moreover, since it is possible to dehydrate only with compressed air, it is possible to operate economically. The installation area may be small. When operating the continuous solid-liquid separation device of the present invention
However, if the gas is blown intermittently, the liquid removal efficiency can be increased and the amount of gas used can be reduced, which is more economical.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a continuous solid-liquid separation device of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line AA ′ of FIG.

FIG. 3 is a perspective view showing an example of a screen body portion.

FIG. 4 is a cross-sectional explanatory view of a screen body portion.

[Explanation of symbols]

1: Screen body part 2: Cover part 3: Gutter-like body 4: Screen 5: Edge of gutter-like body 3 6: Gutter-like body
7: Edge of gutter 6 8: Passage 9: Supply port 10: Outlet port 11: Gas injection nozzle 12: Side plate 13: Saucepan 14: Discharge port 15:
Belt-shaped member 16: Bottom point 17: Surface of opening

Claims (2)

[Claims] 1. A plurality of (N) gutters (3) having a screen (4) portion parallel to an axis are aligned in parallel and are formed by joining edges (5) of adjacent gutters. A plurality of (N or N ± 1) gutters (6) having almost the same width as the gutter (3) and having no screen (6) are aligned in parallel with each other on the wavy screen body (1) and are adjacent to each other. The corrugated cover part (2) formed by joining the edges (7) of the gutter-like body is placed with the screen body part (1) on its back and the cover part (2) lying down to form the gutter-like body (3). , 6) are aligned in the alignment direction of the gutters (3, 6) within a range that does not exceed the width of the gutters, and both face each other without direct contact with each other. Both side parts of the cover part (2) are sealed by the side plates (12) to form a zigzag shape in the alignment direction of the gutters (3, 6). Forming a cheating passage (8), the supply port at one end to the solid-liquid mixture of the passage (8) (9),
At the other end, a solid material outlet (10) for separating the liquid is provided, and for each pair of the corresponding troughs (3, 6), gas is blown into the passage (8) in parallel with the axial direction. A continuous solid-liquid separation device, characterized in that a nozzle (11) is attached. 2. The continuous solid-liquid separation device according to claim 1, wherein a solid-liquid mixture is supplied from a supply port (9), and gas is intermittently introduced into a passage (8) from each gas injection nozzle (11). The liquid is discharged together with the gas blown from the screen (4) out of the passage (8) to separate the solid-liquid, and at the same time, the remaining solid-liquid mixture is sequentially forwarded toward the outlet (10). A continuous solid-liquid separation method in which the solid matter from which the liquid has been separated is taken out from the outlet (10).