JPH0226604A - Apparatus for separating liquid - Google Patents

Abstract

PURPOSE:To improve an operation capacity by covering part of places in outer periphery of a case, wherein small holes are formed, with a cover and connecting a suction device with this cover for the purpose of sucking air within the cover. CONSTITUTION:A case 11, at least part of which is formed by a plate with a large number of small holes or slits, is arranged and liquid contained in a substance, which is charged into the case 11 and made to move through it, is removed through the aforementioned holes or slits. At least part of places in outer periphery of the case 11, wherein the small holes or slits are formed, is covered with a cover 20, which is connected wiht a suction deivce 24-29 which sucks the air within the cover 20 intermittently. It is possible, as a result, to improve an efficiency of liquid separation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a liquid separation device for separating liquids from various substances containing liquids. The materials from which liquids can be separated include fruit and their grinds, beans, fish and other foods, as well as sludge and industrial wastewater. That is, the present invention is not particularly concerned with the type of substance. In addition, the liquid separation device according to the present invention includes a squeezing device, a filtration device,
Regardless of the name of the device, such as a concentrator, it relates to any device that separates at least a portion of a liquid from a liquid-containing substance, regardless of the name of the device depending on its purpose.

(Prior art) A substance containing liquid is placed in a case that has a part with many small holes or fine slits, and the liquid is squeezed out and separated from the small holes or slits (hereinafter simply referred to as small holes) in the case. It is well known that this is happening.

As an example of such a liquid separation device, there is a screw press device that continuously squeezes a substance to extract a liquid. A conventional example will be explained below based on this screw pressing device.

In this screw pressing device, the case is formed into a cylindrical cylinder using a plate material such as punching metal that has the small holes or slits on almost the entire surface, and a screw with spiral blades attached to the shaft is rotatably attached to the cylinder. It is something that The material to be pressed is put into the case through the raw material supply port provided at one end of the case, and the screw is rotated to squeeze and squeeze the material with its blades and cylinder, and the squeezed liquid is discharged from the small hole in the case. It is said to be composed of

(Problems to be Solved by the Invention) Depending on the purpose of use, it is necessary to reduce the amount of solid matter mixed into the separated liquid. In that case, the hole provided in the case may be made smaller, but the smaller the hole, the less the throughput. If the pores are made finer, the throughput will be drastically reduced.

In the case of the screw press, especially when using fine holes or filter cloth, the filtrate is poorly discharged in the filtration zone at the material inlet, resulting in an extreme reduction in the throughput.

The present invention has been made with the aim of improving these points and improving the processing usage as a whole.

[Structure of the Invention] (Means for Solving the Problems) Therefore, the present invention covers at least a portion of the outer periphery of the case, at least a portion where the small holes or slits are provided, and uses a cover to vent the air inside the cover. The devices connected to the suction means are sequentially suctioned. This suction means may be a normal vacuum device, but it must be configured to perform suction intermittently.

In order to intermittently suck the air inside the cover by the suction means, it is desirable to partition the inside of the cover into small chambers and to sequentially switch between the small chambers to suck the air inside the cover.

Furthermore, if the entire case is provided with small holes or slits, it is natural that the entire case may be covered with a cover.

(Operation) When the outer periphery of the case is covered with a cover and the air inside the cover is sucked by the suction means, the substance put into the case is simultaneously sucked. Therefore, at the same time, the liquid contained in the substance is also suctioned. That is, although the liquid is separated from the substance and exits from the small hole by the usual liquid separation means, it should be possible to separate more liquid by suctioning the liquid by the suction means.

However, if the suction was simply continued, almost no effect could be seen.However, it was only by intermittent suction that the processing efficiency could be improved. The reason for this is that when the suction means is used to continuously suction, substances stick to the inner wall of the case and cause clogging. On the other hand, when suction is performed intermittently as in the present invention, the substance that has been suctioned and stuck is moved away from the case by stopping the suction force when the suction is stopped. Therefore, the next suction can be performed without clogging. In other words, according to the present invention, a force for separating liquid by air suction is effectively applied to a substance, and the efficiency of liquid separation can be improved.

(Example) The illustrated example is an example used in a screw compression device 2110. The basic shape of the compression device is not particularly different from conventional ones. 0 Cylinder 11 with many small holes on the surface
A screw 14 having a spiral shape 113 formed around the shaft 12 is rotatably attached to the inside of the shaft 12.The shaft 12 in this embodiment has a double structure inside, and the liquid for heating can be passed through it. is made possible. cylinder it
A feed port 15 is provided at one end of the supply port 15, from which the material to be pressed 16 is introduced into the cylinder 11, and the material to be pressed 16 is moved while being compressed by the rotation of the blades 13 caused by the rotation of the screw 14. The squeezed liquid falls through the small holes in the cylinder 11.

Normally, the cylinder 11 is made by combining two semi-cylindrical cylinder members 18 with punching metal 17 on the inner surface, as shown in FIG. ing. As is well known, the shape of the small hole is not particularly limited and may be a slit.

In this embodiment, a cover 20 is attached to the lower side of the cylinder member 18 (when the device is installed) to cover the outer periphery thereof.

As shown in FIG. 1, the cylinder 11 of the device of this embodiment has a shape in which three cylinders are connected in the longitudinal direction, each of which is formed by stacking a cylinder member 18 having the cover 20 and a cylinder member without a cover. It is. Therefore, the lower side of the cylinder 11 has small chambers 21 and 22 formed by the cover 20.
．． 23 is formed. Each chamber is connected to a valve 25 to 27 through a hole 24 provided at the bottom of the cover 20, and
It is connected to tank 28. At the same time, each valve is connected via a tank 28 to a vacuum pump 29. A filter is provided in the tank 28 to prevent liquid from entering the vacuum pump 29 even if it is sucked by the pump. That is, the hole 24 is an inlet for guiding the liquid squeezed into the small chambers 21 to 23 to the tank 28, and at the same time is a suction port for sucking the air inside the room.

In the valves 25 to 27 of this embodiment, the valve 25 is first opened;
After that valve is closed, the next valve 26 is opened, and then this valve 26 is closed, and the valve 27 is opened, so that the valves are controlled to operate in sequence. It is sufficient to keep it open for 2 to 3 minutes. Needless to say, it may be made shorter or longer depending on the thickness and length of the cylinder 11 and the type of the object 16 to be pressed.

The rear end of the cylinder 11 (the opposite side to where the supply port 15 is provided) of the device IO of this embodiment has a tapered ring 31 that closes between the shaft 12, and this ring 31 is pressed by a spring. It is pressed by a member 32. That is, the compressed material 16 is pressed at i13 and the dehydrated dregs are discharged by overcoming the spring force of the pushing member 32.

The method of use as a liquid separator is the same as that of conventional devices; the material to be pressed 16 is supplied from the supply port 15,
In this embodiment, the vacuum pump 29, which is a suction means for suctioning the air in the small chamber, is operated to sequentially open and close the valves 25 to 27.

The object 16 to be squeezed is squeezed under pressure by the cylinder 11 and the rotating blades 13, and the squeezed liquid is allowed to fall from the small holes of the cylinder 11. At the same time, by opening the valve 25, the compressed material 1 inside the cylinder 11 in the small chamber 21 is
6 is suctioned by the vacuum pump 29 and squeezed by its suction force.Next, when the valve 25 is closed, the suction force disappears, so that the material that was adsorbed to the lower side of the cylinder 11 in the small chamber 21 is removed. The compressed material 16 leaves the lower surface of the cylinder 11 and is moved by the blades 13. Since the valve 26 opens, the compressed material 16 in the small chamber 22 is similarly subjected to the suction force of the vacuum pump 29. It is squeezed. Further, the compressed material 16 in the small chamber 23 is sucked by the valve 27, and the liquid is squeezed out. Next, the valve 25 opens and the compressed object 16 in the small chamber 21 is suctioned, but at that time, the object that was previously adsorbed to the wall of the cylinder 11 has already moved due to the loss of suction force, and is now in place. Since there is a new substance in the liquid, the liquid contained in it can be squeezed out using the suction force of the vacuum pump 29. Repeat this sequentially, i.e.
The object to be pressed 16 is squeezed by the rotational force of the blades 13 and at the same time by the suction force of the vacuum pump 29 as in the conventional case, so that the squeezing rate is further improved.

In this embodiment, only the lower half of the cylinder 11 is covered with a cover, but there is no problem in covering the entire cylinder. In that case, the inside of the cover is also connected to form a small chamber surrounding the cylinder 11. In this way, the entire outer periphery of the cylinder 11 is covered with a cover, and when the inside of the cover is connected to a vacuum pump and sucked, the object to be pressed 1
6 has less contact with air. Therefore, it is ideal for squeezing substances that need to be protected from oxidation.

As an example, the case of making apple juice will be explained. Apple juice is made by crushing apples and squeezing them into juice.

Conventionally, it was necessary to add antioxidants such as vitamin C to prevent oxidation. On the other hand, as mentioned above, the entire outer periphery of the cylinder 11 is covered with a cover,
If the air inside the cover is sucked, the apples inside the cylinder will have less contact with air, so there is no need to add antioxidants.

Furthermore, in this embodiment, when covering the outer periphery of the cylinder with a cover, the cylinder is divided into small chambers and the chamber to be sucked by the vacuum pump is switched by a valve. In this case, it does not mean that the vacuum pump must be operated intermittently, but it is natural that the vacuum pump may be operated continuously and opened and closed using a valve.

Furthermore, the present invention is not only applicable to this screw pressing device, but can be similarly applied to devices such as vibrating and filtering devices.

[Effects of the Invention] As described above, the present invention covers a part of the outer periphery of the case with a cover, and separates the liquid from the substance while intermittently suctioning the air inside the cover using the suction means. Since the separation involves suction of the liquid by the suction means,
Processing efficiency does not decrease even if the diameter of the small holes is made fine.
Therefore, even in the case of filtration using fine pores or filter cloth, the processing efficiency is improved, and the amount of solid matter mixed in the filtrate can be kept to a minimum. Furthermore, when obtaining a dehydrated solid, on the other hand, the pores can be made finer, so the recovery rate is dramatically improved.

By covering the entire case with a cover and sucking the air inside the cover using a suction means, the substances inside the case come into contact with the air less, so oxidation of the substances can be reduced.
It is ideal for separating liquids from substances that do not want to oxidize.

When used in a screw pressing device, the holes provided in the case can be made smaller than in conventional devices, so this can also be used for new purposes as a continuous filtration dehydrator and a concentration filter.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of a cylinder member used in the embodiment of FIG. 29: Vacuum pump agent Patent attorney Tadashi Konno 10 Niscriu compression device 11 Nijilinda, 12: Shaft, 14: Squeezing means, 15: Supply port, 16: Substance,
18 cylinder member, 20: cover,
21-23: Small room. 25-27: Valve, 28: Tank. 13:'Jl

Claims (3)

[Claims] (1) It has a case formed at least in part by a plate material having a large number of small holes or slits, and while the substance contained in the case is moved, the liquid contained in the substance is separated through the small holes or slits. A cover for covering the case is placed over at least a part of the portion on the outside of the case where the small holes and slits are formed, and a suction means for intermittently sucking air inside the cover is attached to the cover. Liquid separation equipment. (2) While dividing the inside of the cover into a plurality of small rooms,
Claim 1: The suction means sequentially suctions the air in each compartment.
liquid separation equipment. (3) The liquid separation device according to claim 1 or 2, wherein small holes are provided throughout the case and the entire case is covered with a cover. (4) A screw-type compression device that has a cylindrical case made of a plate material with a large number of small holes or slits, and in which a screw with spiral blades on its rotating shaft is rotatably arranged,
A squeezing device characterized in that a cover is formed on at least the lower half of the case when the device is installed, and a suction means for intermittently sucking air inside the cover is attached to the cover.