JPH0760494A - Compression-ring extruding liquid removing device - Google Patents

Abstract

PURPOSE:To efficiently obtain a high-quality solid matter minimized in heat deterioration using of a shaft whose manufacturing cost and replacing cost have been reduced. CONSTITUTION:The shaft 1 is rotatably mounted in a cylindrical cage 4 and a roughly squeezing part 2 is made by mounting a compression ring 21 so as to be movable back and forth on the first half of the shaft 1 in the vicinity of the charging port 11 of the cylindrical cage 4. A tightly squeezing part 3 is made by forming screw blades 31 having notches 32 on the second half of the shaft 1 from the roughly squeezing part 2 to a discharging port. The pitch of the screw blade 31 is gradually narrowed in the axial direction and the diameter of the shaft 1 in the squeezing part is gradually thickened in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering apparatus used for reprocessing organic industrial wastes including manure and waste fish from a fish processing plant, manure, sludge and the like.

[0002]

2. Description of the Related Art For example, organic industrial waste is regenerated as a useful resource by using a steaming method, an oil temperature dehydration method, etc., but in any case, it is necessary to squeeze out excess oil or water from solid matter. . Taking a conventional oil extractor as an example,
As shown in FIG. 6, the shaft 61 having a gradually increasing diameter in the axial direction and a gradually decreasing screw pitch is installed in a cylindrical cage.
With the structure inserted in 62, the inner surface of the cylinder is gradually narrowed by sending solids from left to right in the figure by rotating the screw 63.
The solid matter is pushed into the gap between the shaft 64 and the shaft outer side surface 65 to squeeze out the contained oil.

[0003]

With respect to this conventional example, since the screw squeezes out the oil component by twisting the solid substance, the quality of the solid substance obtained by the frictional heat generated in this process is deteriorated. There was a problem that caused. In addition, there is a limitation on the solid matter that can be sent by the screw, and there is an inconvenience that, for example, sludge that is close to a liquid cannot be treated. Further, since the structure of the shaft itself becomes complicated, the manufacturing cost of the shaft is high, and inevitably the overall maintenance cost accompanying the replacement of the shaft is also high.

The above-mentioned problems of the oil squeezing apparatus are common to other conventional liquid removal processing apparatuses. Recycling of organic industrial waste is suitable for a wide range of utility value and resource saving, and in recent years, the demand thereof has been rapidly increasing. Therefore, as a problem to be solved by the conventional liquid removal treatment apparatus, a structure of the liquid removal treatment apparatus that can obtain a high quality solid matter particularly efficiently was examined.

[0005]

As a result, the shaft 1 is rotatably mounted in a cylindrical cage 4, which is
A compression ring 21 is attached to the first half of the shaft 1 near the input port 11 so as to be movable back and forth to form a roughing section 2, and a screw blade 31 having a notch 32 in the latter half of the shaft 1 from the roughing section 2 to the discharge port 12 is provided. A compression ring extrusion type dewatering apparatus was developed which was characterized in that it was formed into the compression section 3. Screw feather
It is preferable to form the pitch of 31 to be gradually narrowed toward the output side in the axial direction, or to gradually increase the diameter of the shaft 1 of the compression unit 3 toward the output side in the axial direction. A hydraulic cylinder may be used to drive the compression ring. This device can be used not only for the deliquoring process in the recycling process of organic industrial waste, but also as a general squeezing machine.

[0006]

The squeezing ring extrusion type deliquoring treatment apparatus of the present invention performs deliquoring treatment of solid matter in two stages of the squeezing section 2 and the squeezing section 3. The squeezing unit 2 compresses the solid matter input from the input port 11 by, for example, a hydraulic cylinder-driven squeeze ring 21 to perform liquid removal processing. Since the compression operation speed of the compression ring 21 is higher than the delivery speed by the screw blades 31 of the compression unit 3, the solid matter is compressed so as to be pressed against the screw blades 31. The squeeze ring 21 operates so as to cover the cylindrical cage 4, so that even solid matter that is close to a liquid state can be easily processed, and the solid matter is pressed and squeezed to generate frictional heat. Absent.

The compacting section 3 narrows the pitch of the screw blades, widens the shaft diameter to narrow the gap between the cylindrical cage and the shaft, or performs both of the above methods.
The solid material is squeezed by gradually reducing the occupied space of the solid material to be delivered. The notch 32 of the screw blade 31 has a so-called pressure relief function so as not to inconvenience the delivery of the solid matter due to the excessive pressure of the compression ring 21. When the screw blades are fed, the solid matter is pressed and squeezed so that frictional heat is not generated.

[0008]

EXAMPLE An example of a pressing ring extrusion type dewatering apparatus of the present invention will be described below with reference to the drawings, taking an oil pressing apparatus as an example. FIG. 1 is a partially cutaway side view of a compression ring extrusion type oil compression device in which a compression ring and a screw blade are attached to a device having the same shape as a currently used oil compression device.
[Fig. 3] is a schematic diagram showing the relationship between the operation of the compression ring of the coarse compression unit and the screw diameter of the compression unit and the shaft diameter. 2 is a plan view when the pitch of the screw blades is constant and the shaft diameter is the same, FIG. 3 is a plan view when only the shaft diameter is gradually increased in the axial direction, and FIG. FIG. 5 is a plan view in the case where the shaft is gradually narrowed in the direction and is provided with a notch, and the shaft is also gradually thickened in the axial direction. FIG. Note that FIG.
1 is the same as the configuration of the embodiment of FIG. 1, and the sectional view of FIG. 5 is the same as that of FIGS.

As shown in FIG. 1, the oil squeezing apparatus of the present embodiment has a squeezing section 2 near the bottom of the input port 11 and a squeezing section 3 from the end 22 of the squeezing section to the discharge port 12. A compression ring 21 driven by a hydraulic cylinder 23 is inserted into the shaft 1 in the roughing section 2, and the compression section 3 has screw blades 31 for increasing the shaft diameter in three steps and delivering solid matter to three locations. Is provided. The pitch of the screw blades 31 is narrowed in the axial direction.

The pressing ring 21 forming the roughing section 2 is shown in FIG.
As seen in Figure 4, the four arms are bent in a U shape.
One end of 24 is connected to the rear side of the compression ring 21, and the other end is connected to the hydraulic cylinder 23. Each of the arms 24 is reinforced by being connected to each other at a bent portion 25 via an annular member 26. In this embodiment, when the hydraulic cylinder 23 retracts, the compression ring 21 reaches the squeezing portion end 22 to compress the solid matter, and conversely when the hydraulic cylinder 23 extends, the compression ring returns to its original position and waits. Considering the load reduction of the hydraulic cylinder,
Inverter control the drive timing of the hydraulic cylinder,
It is advisable to make the speed change during initial motion and braking smooth.

As shown in FIG. 1, the squeezing unit 3 has a structure in which tapered blocks 33 having a larger diameter in the axial direction and parallel blocks 34 having a constant diameter in the axial direction are alternately connected. The taper block 33 is formed with a screw blade 31 for delivering a solid material. The screw blade 31 has a narrow pitch in the axial direction and has a notch 32 for releasing pressure. The solid matter obtained by squeezing out most of the oil in the roughing section 3 is fed by the screw blades 31 to the inner surface 41 of the cylindrical cage.
And is pushed into the gap formed by the shaft outer surface 35,
The required amount of oil is further squeezed slowly over time.

In addition to the above-mentioned configuration, the actual oil expeller is equipped with an inlet 11 for the cylindrical cage 4 into which the shaft 1 is inserted.
A hopper 51 is attached to the bottom of the cylindrical cage 4, an oil recovery passage 52 for recovering the squeezed oil is disposed below the cylindrical cage 4, and a compound 53 is attached to the shaft end 13 in order to adjust the squeezing pressure of the squeezing portion 3 and the discharge port The opening area can be adjusted. The squeezing pressure of the entire apparatus can be adjusted by adjusting the treatment interval with a squeeze ring to increase or decrease the treatment amount per hour.

Here, the operation of the compression ring and the relationship between the screw blade and the shaft diameter will be described with reference to the schematic view. As shown in FIGS. 2 to 4, the liquid removal treatment apparatus of the present invention squeezes solid matter by advancing the squeeze ring 21 located on the left side of the drawing from the position of the broken line to the position of the solid line, and at the same time densely squeezes it. The liquid removal process is performed by the procedure of sending the remaining liquid to the pressing unit 3. As shown in FIGS. 2 to 4 and 5, the squeeze ring is connected to the hydraulic cylinder 23 via a U-shaped arm 24 so that the squeeze process of the squeeze ring 21 can be performed when the cylinder is retracted. ing. In the example of FIG. 2, since the diameter of the shaft 1 is constant and the pitch of the screw blades 31 is also constant, the space a of the squeezing section 3 is wide, and the solid matter cannot be squeezed very efficiently.

Regarding the processing capacity in the compression section, it is better that the space a is narrower, but if the space a is too narrow, the processing amount decreases. Therefore, it is preferable that the shaft is gradually narrowed in the axial direction. Therefore, in the example of FIG. 3, the shaft 1 of the squeezing unit 3 is gradually thickened in the axial direction. By doing this,
The space a is gradually narrowed in the axial direction of the shaft 1, and the processing capacity is improved as compared with FIG.

However, since the processing amount decreases as the space a becomes narrower, it is necessary to increase the amount sent to the compression unit 3 in inverse proportion to the size of the space a. Therefore, the pitch of the screw blades 31 of the squeezing unit 3 is formed to be gradually narrowed in the axial direction of the shaft 1 to increase the pressure for feeding the solid matter, and due to the overload accompanying the pressure increase, the screw is increased. If the notch 32 is provided so as not to damage the blades 31 and the pressure is released, it is possible to improve both the processing capacity and the processing amount. FIG. 4 is an example thereof, and the embodiment shown in FIG. 1 is based on the configuration of FIG.

The oil extraction device of this embodiment can be used as it is as a dehydration treatment device. However, the difference in properties between oil and water (viscosity, etc.), the amount of treatment required per unit time for the entire device, and the degree of liquid removal treatment (how much content is squeezed to solid matter, etc.) should be considered. Considering this, it is preferable to form the compression ring and the screw blade with a combination suitable for each application. For example, an air cylinder may be used instead of the hydraulic cylinder, or the cross-sectional shape of the compression ring may be formed in a convex shape in the compression direction.

[0017]

INDUSTRIAL APPLICABILITY The squeeze ring extrusion type dewatering apparatus of the present invention is capable of easily deliquoring a liquid muddy material by pushing it in with a squeeze ring, and the depressurizing section and the squeezing section. Processing efficiency can be improved by performing the dewatering process in two stages, and because the generation of frictional heat at the time of compression is small, quality deterioration due to thermal deterioration of solid matter is eliminated. Has improved.

In addition, in the conventional dewatering apparatus, it was necessary to install a screw without a notch in order to perform sufficient dewatering, which made the difficulty of processing a high unit cost of the shaft and, for example, replacing the shaft due to a failure or the like. However, since the device of the present invention has few screw blades, the device of the present invention is easy to process and can be manufactured at low cost, so that the cost for shaft replacement is significantly reduced. There is also.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a compression ring extrusion type oil compression device.

FIG. 2 is a schematic diagram example 1.

FIG. 3 is a schematic diagram example 2.

FIG. 4 is a schematic diagram example 3.

5 is a sectional view taken along line AA in FIG.

FIG. 6 is a partially cutaway side view of a conventional oil extraction device.

[Explanation of symbols]

 1 Shaft 2 Coarse part 21 Squeeze ring 3 Dense part 31 Screw blade 32 Notch 4 Cylindrical cage

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[Procedure amendment]

[Submission date] January 19, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Added

[Correction content]

[Figure 6]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 29/25 ZAB 29/37 ZAB B09B 3/00 ZAB C02F 11/12 ZAB D 7446-4D B09B 3 / 00 301 Q

Claims (3)

[Claims] 1. A shaft 1 is rotatably mounted in a cylindrical cage 4, and a compression ring 21 is attached to the first half of the shaft 1 in the vicinity of an inlet 11 of the cage so that the compression ring 21 can be moved back and forth. Notch 32 in the latter half of the shaft from the part 2 to the outlet 12
A squeezing ring extrusion type dewatering apparatus, wherein a screw blade 31 having a squeezing blade is formed as a squeezing section 3. 2. A squeeze ring extrusion type dewatering apparatus, wherein the pitch of the screw blades 31 according to claim 1 is formed so as to be gradually narrowed in the axial direction. 3. A squeeze ring extrusion type dewatering apparatus, wherein the diameter of the shaft 1 of the squeezing section 3 according to claim 1 or 2 is gradually increased in the axial direction.