DE102008056041A1 - Sieving system, has deflector partially formed as double-sided flow splitter or separate component at deflector is formed as splitter, where tips and edges of splitter are aligned against feed flow with specific angle to feed flow - Google Patents

Abstract

The system has a sieving machine (5) provided in a channel (1) or housing of water purification systems such that a feed flow (4) is bounced against a deflector (13) in the machine or at a component of the channel or housing. The machine has side panels (6) that include sieves (11) with web or sieve bars, where the deflector is partially formed as a double-sided flow splitter (12) or a separate component at the deflector is formed as the splitter. Tips and edges of the splitter are aligned against the flow with a consistent, leveled or increasing angle between 30 to 60 degrees to the flow.

Description

Screeners The type mentioned in the preamble are known in many forms. The screening machine has rotating screen fields parallel to the direction of flow with sieves made of fabric or sieve bars in individual sieve frames on. The screen fields consist of a screen frame and attached above Seven fabrics or sieve bars. The hollow box-shaped Screen frames are stiffened by transverse stiffeners so that the highly loaded Sieve fields and their seals are dimensionally stable. This construction considered the strength, durability and effectiveness of the sieve panels.

By the flow deflection in the sieve and through the flow passage through the sieve through pressure losses occur that can be critical. Therefore For example, use a small flow rate and optionally aerodynamic profiles the sieve bars.

adversely in the known screening plants, that overall the pressure loss considered large in the plant becomes. Here, the pressure loss is simplified as the difference understood the water level before and after the screen.

The Invention is therefore based on the idea of the flow in the screening plant, but in particular to improve the deflection of the flow. This can advantageously be done at two hydraulic locations: at the location of the rectangular deflection of the inlet flow within the screening plant and the loading of the screen fields themselves.

The associated problem is solved in that the baffle or a separate Component on the baffle as flow divider is formed and / or the transverse stiffeners designed as a blade-like flow guide are as in the claims described, and thus the flow deflection support and equalize the loading of the screen fields.

advantages The inventive training consist not only in the intended Flow guidance, but also in the simplicity of realization. Both the transverse stiffeners, as well as the baffle are generally intended as such, so that no additional Component is required. Furthermore let yourself the blade shape or the flow divider realize in a simple way, either in a flat, beveled or curved Shape.

The invention is shown schematically and very simplified in the figure. 1 shows a longitudinal section, 2 a cross section through a screening machine according to the invention.

In a channel ( 1 ) are transverse walls on the inlet side ( 2 ) and on the outlet side ( 3 ), so that the inflow ( 4 ) is forced through the screening machine ( 5 ), which is arranged in the opening of the transverse walls. The feed flow ( 4 ) in the screening machine ( 5 ) deflected at right angles and outside the screening machine ( 5 ) in general again at right angles in the longitudinal direction of the inlet flow ( 4 ) redirected.

On the representation of the individual components of the screening machine ( 5 ), For example, chain drive, guides and seals can be omitted here, since they are not the subject of the invention, as well as the effect of Siebmeche with regard to the sieving effect and the removal of sieved solids.

The screen fields ( 6 ) run in the channel ( 1 ) to traction means not shown in order. The feed flow passes through the sieve fields ( 6 ) and is deflected several times, first to the outside ( 7 ), then again as outlet flow ( 8th ) parallel to the inlet flow in the longitudinal direction. The screen fields ( 6 ) consist of hollow box-shaped sieve frame with lateral walls ( 9 ) and are with transverse stiffeners ( 10 ) stiffened. On the sieve frame are the sieves ( 11 ) fastened from fabric or screen bars. The sieves are shown schematically in the figure by a dashed line. An innovative flow divider ( 12 ) is as part of the baffle ( 13 ) or as a separate component formed on it and has a uniform, stepped or increasing angle to the inlet flow between 30 ° to 60 °. The transverse stiffeners ( 10 ) can be shaped as mentioned in claim 2 according to the invention. The transverse reinforcement achieved in the simplest, even shape, the inventive favorable flow guidance. The alternative blade-like shape of the transverse stiffeners can be achieved by a simple fold or by a curvature. The transverse stiffeners have a uniform, stepped or increasing angle between 30 ° to 60 ° to the inlet flow. The pressure loss as difference of the water level before and after the screening plant is entered as ΔH.

1

channel

2

inlet side

3

outlet side

4

inlet flow

5

screening machine

6

mesh panels

7

Flow after Outside

8th

outlet flow

9

lateral walls

10

cross braces

11

Siebe

12

flow divider

13

baffle wall

(AH)

pressure drop

Claims (2)

Sieve with a screening machine in a channel or housing of water purification systems, wherein the inlet flow bounces against a baffle in the screening machine or on a component of the channel or housing and the screening machine parallel to the direction of flow rotating sieve panels with sieves of fabric or sieve bars in individual sieve frame, wherein the flow in the screening machine is deflected in the direction of the screen fields and wherein the screen frames are substantially hollow box-shaped with transverse stiffeners, characterized in that the baffle is at least partially similar to a two-sided flow divider or that a separate component is formed on the baffle as a flow divider whose Tip directed against the inlet flow and their flanks with a uniform, stepped or increasing angle between 30 ° to 60 ° to the inlet flow. Sieve with a sieve in a channel or housing of water purification systems, wherein the inlet flow against a baffle in the Screening machine or bounces on a component of the channel or housing and the screening machine parallel to the direction of flow rotating screen fields with sieves made of fabric or sieve bars in individual sieve frames has, where the flow is deflected in the screening machine in the direction of the screen fields and wherein the screen frame substantially hollow box-shaped with transverse stiffeners are formed, characterized in that the transverse stiffeners like a blade set in the direction of the flow deflection are and at least one section with a uniform, tiered or increasing angle between 30 ° to 60 ° to the inlet flow.