JPH0513694U - Kitchen filtration screen - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the production of a screen used for the filtration of solid-liquid mixed kitchen waste, increase its strength, and facilitate the maintenance of the screen. [Structure] The solid-liquid mixed crushing garbage is filtered and has a substantially cylindrically-shaped perforated projection that protrudes from the screen surface of the screen. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screen for filtering garbage, and more particularly to a shape of a screen for solid-liquid separation after crushing kitchen waste.

[0002]

[Prior Art]

 Reducing the water content in the kitchen waste and simultaneously reducing the bulk of the solid material facilitates post-processing of the kitchen waste. For this reason, a method is used in which kitchen waste is once crushed and solid-liquid is separated with a filtering screen. The screen is formed in a substantially cylindrical shape, and the crushed kitchen waste conveyed to the inside of the screen is subjected to its own weight or pressure to separate water, and flows out from a perforated portion provided around the screen for solid-liquid separation. The solids after solid-liquid separation are incinerated or landfilled, and the liquids are purified by the sewer and discharged.

The screen used for the above purpose can withstand a salt content and a pressure contained in the solid-liquid mixture, so that a desired hole is formed in a metal plate having high corrosion resistance such as a stainless steel plate or a corrosion-resistant treated steel plate, or a similar material. The metal wire made of is formed in a net shape and has a large number of openings, and is formed in a cylindrical shape.In addition, kitchen waste with a small water content and large solids escape from the pressurizing point without applying a load on the screen. In order to be pushed up quickly by the rotation of the screw, and in order to maintain the strength of the screen, thin plate materials etc. are fixed by welding as appropriate.

An example of such a screen is disclosed in Japanese Patent Laid-Open No. 3-11099. As shown in FIG. 4, the spiral blade portion b of the screw a rotated by a drive device (not shown) is surrounded from above a predetermined location h and slid below the predetermined location. The screen d thus formed is gripped and stands upright on the stand e to form a solid-liquid separation tank. The crushed kitchen waste that has entered from the lower part i of the separation tank is gradually pushed upward by the screw a that rotates in the direction of the arrow a. At this time, the space f formed by the blade portion b, the body portion c of the screw, and the screen d is gradually narrowed toward the upper part, so that the kitchen waste is pressurized to discharge water and the screen d is discharged. The liquid leaks from the perforated part and is separated into solid and liquid.

[0005] Furthermore, in order to prevent an abnormal increase in pressure due to crushed garbage and a large amount of solids that have a low water content such as fish bones and meat that are not dehydrated by pressurization, that is, are not easily compressed, the inner wall of the screen d is prevented. In the vertical direction, a plurality of thin plate materials g are fixed by welding or the like upward from a predetermined position h on the inner wall of the screen d, and when the crushed garbage with a low water content is clogged in the space f, the edge portion of the thin plate material g is It is constructed so as to escape upward through G to prevent an overload of the rotation of the screw a.

[0006]

[Problems to be solved by the device]

 However, the work of attaching the thin plate material g to a predetermined position on the inner surface of the cylindrical screen d requires not only a special holding tool because the screen is bent by a thin porous body, but it is necessary to join it by welding. A high level of technology is required to reliably weld a relatively thick member to a thin material, and further work is required to remove irregularities after welding that occur on the back surface of the weld. As a result, the screen became expensive.

Further, due to the fibrous substance and the paste-like substance contained in the kitchen waste, the openings of the screen are gradually clogged and the purpose of solid-liquid separation is not achieved. For this reason, the separation tank is disassembled from time to time and the screen is regularly scraped with a brush or scraper, or the screen is taken out and heated to carbonize or ash the garbage to remove these fibrous and pasty substances. Although it is necessary to remove it, in any case, the above-mentioned thin plate material interferes with these works and reduces work efficiency.

[0008]

[Means for Attempting to Solve the Problems]

 In view of this, the present invention provides a bending protrusion protruding from a predetermined position of the screen that protrudes from the screen surface of the cross section of the substantially cylindrical screen that filters the solid-liquid mixing crushing garbage at a right angle to the vertical direction of the cylinder. It was molded into a peripheral shape to help the crushed garbage with a low water content escape upward and to obtain the required strength for the screen, and at the same time facilitate the scraping work of the screen surface. It is a thing.

[0009]

[Action]

 Even if the solid-liquid mixing and crushing kitchen waste enters the inside of the solid-liquid separation tank and the pressure is applied to the outside, the side surface of the bent protrusion forms a surface perpendicular to the pressing direction, so the required strength is obtained. Not only that, if the bent protrusion is not formed, the liquid does not flow from the bent protrusion, and therefore the bent protrusion is not contaminated. Further, since there is no thin plate or the like, the surface of the screen is smooth, and it becomes easy to clean the surface with a brush or a scraper.

[0010]

【Example】

 1 and a are perspective views of a substantially cylindrical screen according to the present invention, and FIG. 1b is a plan view of its discharge side, in which 1 is a screen, 2-1 is a bent protrusion, and 3 is a bent protrusion. Of the bent portion, 4 is a side surface of the bent protruding portion, 5 is a perforated portion, 6 is a predetermined portion, 7 is an outer peripheral surface of the screen, 8 is an inner peripheral surface of the screen, 9 is a scraper, 10 is a charging side, 11 is a It is the discharge side.

The solid-liquid mixing and crushing garbage enters the inside of the lower part of the substantially cylindrical separation tank formed by the screen 1, and the drilling part 5 on the surface of the screen 1 while moving upward from the charging side 10. More water flows out and is discharged to the outside, and only solid garbage is stored inside the cylinder. At this time, there is a bent protrusion 2-1 on the inner peripheral surface 8 of the screen, and the protrusion is a surface that is substantially perpendicular to the tangent to the inner peripheral surface 8 of the screen in the direction of rotation of the screw shown by the arrow a. Is formed by a side surface portion 4 having a curved surface and a gentle loose portion 3 connected to the side surface portion 4 and has a substantially cylindrical shape. For this reason, when the solid garbage in the screen cylinder moves while compressing by the rotation of the screw and hardens, it gradually approaches the inner peripheral surface 8 of the screen and ascends the side surface 4 to reach the discharge side 11.

Further, even if water-containing mud adheres to the outer peripheral surface 7 of the screen, the outer peripheral surface 7 of the screen is wiped by the scraper 9 fixed by the outer casing of the device (not shown) without being blocked by the protrusions or the like. The scraping work can be easily performed.

FIG. 2 shows another embodiment as compared with FIG. 1, in which the bent protrusion 2-2 protrudes outward from the outer peripheral surface of the screen. In this embodiment, the blade of the screw is configured to slide on the inner peripheral surface 8 of the screen over the entire surface, and the escape of the hard solid material passes through the space formed by the blade of the screw, the loose portion 3 and the side portion 4. And escape to the top.

This screen is formed, for example, by pressing a thin plate to form an opening and a bent protrusion, and then bending and joining the thin plate into a cylindrical shape.

FIG. 3 shows another embodiment as compared with FIG. 1, in which the bending protrusion 2-3 is bent in a spiral shape. The hard solid material travels along the side surface portion 4 and easily escapes to the upper portion.

It should be noted that while the present invention has been illustrated and described with respect to a preferred embodiment, various changes can be made without departing from the invention and are not necessarily limited to the form shown. Absent.

[0017]

[Effect of the device]

 The solid-liquid mixing and crushing garbage goes into the inside of the cylinder of the screen, and even if pressure is applied to the outside, the cylindrical screen can obtain the required strength at the bent protrusion.

If the opening surface for filtration is not opened in the loose part, the separated liquid flows from the parts other than the above part, and since there is no thin plate material etc., the outer peripheral surface of the screen is smooth and the surface is scratched with a scraper or the like. It is possible to carry out work.

[Submission date] October 2, 1991

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

The screen used for the above purpose can withstand a salt content and a pressure contained in the solid-liquid mixture, so that a desired hole is formed in a metal plate having high corrosion resistance such as a stainless steel plate or a corrosion-resistant treated steel plate, or a similar material. The metal wire consisting of is formed in a net shape and has a large number of openings, and is formed in a cylindrical shape.In addition, kitchen waste with a small water content and large solids are released from the pressurizing point without applying a load to the screen. In order to be pushed up quickly by the rotation of the screw, and in order to maintain the strength of the screen, thin plate materials etc. are fixed by welding as appropriate.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

【Example】

 1 and b are perspective views of a substantially cylindrical screen according to the present invention, and FIG. 1a is a plan view of its discharge side, in which 1 is a screen, 2-1 is a bent protrusion, and 3 is a bent protrusion. Of the bent portion, 4 is a side surface of the bent protruding portion, 5 is a perforated portion, 6 is a predetermined portion, 7 is an outer peripheral surface of the screen, 8 is an inner peripheral surface of the screen, 9 is a scraper, 10 is a charging side, 11 is a It is the discharge side.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Further, even if water-containing mud adheres to the screen outer peripheral surface 7, the screen outer peripheral surface 7 is wiped by the scraper 9 fixed to the outer periphery of the device (not shown) without being blocked by the protrusions or the like. The scraping work can be easily performed.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017]

[Effect of the device]

 Even if solid-liquid mixing and crushing kitchen waste enters the inside of the screen cylinder and is pressed outward, the cylindrical screen can obtain the necessary strength at the bent protrusion.

[Brief description of drawings]

FIG. 1A is a perspective external view of a substantially cylindrical screen according to the present invention, and FIG. 1B is a plan view of its discharge side.

FIG. 2 is another embodiment of the present invention compared with FIG.

FIG. 3 is another embodiment of the present invention compared with FIG.

FIG. 4 is a diagram illustrating a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen 2 Bending projection 3 Loose part 4 Side part 5 Drilling part 6 Predetermined location 7 Screen outer peripheral surface 8 Screen inner peripheral surface 9 Scraper 10 input side 11 discharge side.

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[Procedure amendment]

[Submission date] October 2, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

1. A screen provided around a substantially cylindrical shape for filtering solid-liquid mixed crushing garbage, which is provided around a predetermined portion 6 of the screen surface, and is provided with a bent protrusion 2 protruding from the screen surface. The kitchen waste filter screen, characterized in that the bent projecting part (2) has a gentle loose part (3) and a steep side part (4), and is constructed integrally with the screen. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 2, 1991

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

1 is a perspective view of a substantially cylindrical screen according to the present invention, and FIG. 1 is a plan view of a discharge side thereof.

FIG. 2 is another embodiment of the present invention compared with FIG.

FIG. 3 is another embodiment of the present invention compared with FIG.

FIG. 4 is a diagram illustrating a conventional example.

Claims (1)

[Scope of utility model registration request] 1. A screen provided around a substantially cylindrical shape for filtering solid-liquid mixed crushing garbage, which is provided with a bending protrusion 2 which is provided around the screen above a predetermined portion 6 of the screen and protrudes from the screen surface. In addition, the bent protruding portion 4 has a gentle loose portion 3 and a steep side surface portion 4, and is configured integrally with the screen.