JPS61235098A - Screw press dehydrator having plural lines of screw cylinder - Google Patents

Abstract

PURPOSE:To provide the titled screw press dehydrator preventing the adhesion of the solid body of the sewage in a cake, etc. to the screw,etc. and increasing the crushing, push feeding efficiencies, etc. of the screw by providing the guide member to lead the cake located at the second screw cylinder side to the first screw cylinder side which is provided in parallel. CONSTITUTION:The body to be disposed (cake) having high water content of sludge, etc. is inputted 5 and advanced gradually by pressing with the rotation of the first and second screws 2, 12 and blades 2, 12a. The cake inside the second screw cylinder 11 is push-fed by the screw 12 then and led in succession into the first screw cylinder 1 with pushing by the blade 12a of the screw 12 along a slant guide plate 18. When the cake advancing in the cylinder 1 reaches a cake cutter, the squeezing and dehydration are performed with its repeated going in and out between the sliding slide plates 10a, 10b and fixed plate 9, the cake is fed to the cake cutter 30 with its push-feed to the first screw 2 and it is fed to a discharging port with the same operation. The cake then enlarges with pushing the discharging port 6 against the force of a spring 8 to promote the dehydration further and the solid body is discharged to the external part.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for use in dewatering sewage sludge, various industrial wastewater sludge, etc., or solid-liquid separation in the manufacturing process of various products. This relates to a screw press dehydrator.

[Prior Art] Conventionally, in addition to using a screw cylinder and a screw, various types of dewatering devices for squeezing and dewatering a processed material containing solids (hereinafter referred to as a cake) were installed in the middle part of the screw cylinder. A screw press dehydrator is used, but the screw cylinder and screw mentioned above are only of single-piece construction.

However, the cake that has just been introduced from the inlet contains a large amount of solid matter such as dirt, which adheres to the screw blades and the surface of the screw shaft, causing a problem in which the cake is not pushed out by the screw. Therefore, these substances are not sent to the discharge port side and accumulate on the blades, etc., reducing the cake crushing efficiency of the screw and causing the disadvantage that solid substances such as the above-mentioned dirt cannot be removed from the cake.

[Problems to be Solved by the Present Invention] The present invention is intended to solve the above-mentioned drawbacks, etc., and its purpose is to prevent solid matter such as dirt in the cake from adhering and accumulating on the screw, etc., and to prevent the crushing of the screw. , improves extrusion efficiency,
To provide a screw press dehydrator having multiple rows of screw cylinders that improves the effects of crushing, squeezing, and dehydrating a cake.

[Means for Solving Problem L] In order to achieve the above object, the present invention has a first screw which is installed in a penetrating manner and is installed in parallel with a first screw cylinder which pushes the input cake and sends it to the discharge port side. A second screw cylinder is provided, and the second screw cylinder is interposed near the discharge port of the first screw cylinder and is formed to squeeze and dewater the cake, and extends to the vicinity of each device. In addition to providing
A second screw is installed in the second screw cylinder by penetrating the second screw provided with the first screw, and a screw is installed at the end of the second screw cylinder on the apparatus side, and on the second screw cylinder side. The means for this purpose is a screw press dehydrator having a plurality of rows of screw cylinders provided with a guide member for introducing a certain cake into the first screw cylinder side.

[Example] Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, the first screw 2 passing through the first screw cylinder 1 is supported by bearings 3a and 3b, has an operating gear 4 fixed to one end thereof, and is driven by a drive source 18. . Moreover, the discharge port 6 of the first screw cylinder 1 is opened along the axis of the first screw 2 at the other end side. The sliding plate boss 7, which is constantly pressed by the spring 8, is the discharge port 6.
It is set up so as to block the area. The cake cutters 20 and 30 provided near the discharge port 6 of the first screw cylinder 1 are operated by an eccentric circular cam 17 driven by a drive source 18 different from the one described above.
two sliding plates 10a that engage with circular holes, and a plurality of sliding plates 10b that are connected to these through a connecting shaft 21 and arranged.
It consists of sliding plates 10b and fixed plates 9a arranged alternately, and the sliding plates 10a and Job move circularly around the axis of the first screw by an eccentric circular cam 17 while contacting the fixed plates 9a. A fixed plate 9a that slides and squeezes and dehydrates the cake that is being pushed is fixed to a bracket 23 by a fixed shaft 22. In particular, the sliding plate 10a
and 10b have their motion cycles out of phase with each other. Furthermore, the sliding stroke of the sliding plate 10b (distance gI away from the first screw 2) is larger than that of the sliding plate 10a.
) has become smaller. These are eccentric circular cams 17
It is adjusted by adjusting the eccentric position and position amount of.

As shown in FIGS. 2 and 3, the second screw tube 11 is arranged in parallel with the first screw tube 1 and extended to the vicinity of the installation position of the cake cutter 20. The input port 5 opens into the first screw cylinder l and the second screw cylinder 11 and is connected thereto. A second screw 12 is provided to pass through the second screw cylinder 11, and the second screw 12 is supported by a bearing 3C and a bracket 15, and has an intermediate gear on one end side as shown in FIG. An operating gear 13 meshing with the operating gear 4 via 14 is fixed.

The blades 12a of the second screw 12 are arranged at the same pitch as the blades 2a of the first screw 2, and are interposed with each other as shown in FIG.

Further, a guide plate 18 serving as the above-mentioned guide member is provided at the end of the second screw cylinder 11 on the cake cutter 20 side.

As shown in the figure, the guide plate 1B is arranged to be inclined in the direction in which the screw advances, and the guide plate 1B is arranged so as to be inclined in the direction in which the screw advances.
It is intended to be introduced into the l side of the screw cylinder.

Next, the effects of this embodiment will be explained.

When a material to be treated (cake) with a high water content, such as sewage sludge, is introduced into the inlet 5, the cake is gradually advanced by rotation of the first and second screws 2, 12 and pressure by the blades 2a, 12a. First and second screws 2 in parallel
, 12 forcibly advance the cake, which tends to be difficult to advance due to its high water content, with the blades 2a, 12a.

Further, the blades 2a and 12a, which are placed in different directions, separate solid matter such as dirt in the cake that tends to adhere to the blade surface from the blade surface and move it forward. Second screw tube ll
The inner cake is pushed by the screw 12 to the guide plate 1.
8, it is successively introduced into the first screw cylinder l along the slope of the guide plate 1B while being pushed by the blades 12a of the second screw 12.

The cake thus advanced inside the first screw cylinder l,
When reaching the cake cutter 20, a sliding plate 10a that slides;
The juice is repeatedly moved in and out between 10b and the fixed plate 9 to be squeezed and dehydrated, and is pushed by the first screw 2 to reach the cake cutter 30, where it is subjected to the same action and advances to the discharge port 6. The cake pressed by the screw 2 pushes the sliding post 7 which blocks the discharge port 6 against the force of the spring 8 to spread the discharge port 6, further promoting dehydration and discharging the solid matter to the outside.

In this embodiment, the second screw 12 is a single screw, but the second screw 12 is not limited to this, and a plurality of screws may be used. Further, the direction of the blades 12a of the second screw 12 does not necessarily have to be in the same direction as the first screw 2, but in the case of the opposite direction, the blades 12a of the second screw 12 may be operated so as to rotate in the opposite direction to the first screw 2. is required. Further, the torsion angle of the second screw 12 does not have to be the same as that of the first screw 2. Furthermore, the cake cutter 20 used in this embodiment
．． Of course, 30 does not have to be of the above type.

The number of cake cutters 20 and 30 is also not a particular problem.

[Effects of the Invention] As described above, the multiple rows of screw cylinders promote the forward movement of a cake with a high water content to promote dehydration, and also peel off dirt, etc. inside the cake that adheres to the blades of the screw 1 by friction, etc. The cake is then pushed to the cake cutter 20, 30 side, thereby improving the efficiency of squeezing and dewatering the cake.

[Brief explanation of drawings]

FIG. 1 (a) is a bottom cross-sectional view of an embodiment of the present invention, (b)
2 is a vertical sectional view, and FIG. 2 is a partially enlarged axial sectional view taken along the line V-V in FIG. 1. 1...First screw tube. 2...First screw, 2a, 12a...Blade, 3a, 3b, 3c = Bearing, 4, 13-...
・Operating gear, 5... Input port, 6... Discharge port, 7...
・Sliding boss, 8...Spring, 9...Fixing plate, 1
0a, 10b...Sliding plate, 11...Second screw cylinder. 12...Second screw, 14...Intermediate gear, 1
5... Bracket, lθ... Guide plate, 17... Eccentric cam. 18.19... Drive source, 21... Connection shaft, 22...
・Fixed axis. 2a...Bracket.

Claims (1)

[Claims] A first screw is installed to pass through the inside of the first screw cylinder, and extrudes the material to be processed including solids introduced into the screw cylinder in the axial direction of the screw. A screw press dehydrator is provided with a device for squeezing and dewatering the object to be treated, wherein a second screw tube is arranged in parallel with the first screw tube and formed on the input port side of the object to be treated. is installed in the screw cylinder, passing through a second screw arranged in parallel and intersecting with the first screw, and a second screw is installed at the end of the second screw cylinder on the apparatus side. A screw press dewatering machine having a plurality of rows of screw cylinders, characterized in that a guide member is provided for introducing the processed material on the cylinder side into the first screw cylinder side.