Curved Screen Inlet Elbow for Centrifuge Pre-Dewatering

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Solution Overview

Problem

Existing screen centrifuges face performance limitations when dewatering moist granules due to high water content, which restricts the efficiency of the dewatering process.

Innovation Solution

Incorporating an inlet elbow with a curved screen that deflects the granules and separates liquid from the material, allowing for pre-drying before further dewatering in a screen centrifuge, thereby increasing the centrifuge's performance by removing a significant proportion of liquid.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the water content of moist material is high, then the material can be fed to the screen centrifuge, but the performance of the screen centrifuge is limited

Engineering Contradiction:

Improvescreen centrifuge performanceVSAvoidwater content

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The inlet elbow performs preliminary dewatering action by separating liquid from granules before the material enters the screen centrifuge. This pre-drying step removes a significant portion of liquid upfront, allowing the screen centrifuge to operate at higher productivity without being limited by excessive water content in the feed material.

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If a curved screen is added to the inlet elbow for pre-drying, then liquid can be removed from granules, but the device complexity increases

Engineering Contradiction:

Improveliquid content in granulesVSAvoidinlet elbow structure

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The curved screen is integrated into the inlet elbow structure, merging the pre-drying function with the existing material feed component. This combination allows liquid removal capability to be added without requiring a completely separate pre-drying device, thus limiting the increase in overall device complexity while still achieving effective liquid separation before the screen centrifuge.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The pre-drying process enhances the dewatering efficiency of the screen centrifuge by significantly reducing the liquid content of the granules, allowing for more effective liquid removal and improved performance, applicable to granules of various sizes and types.

Implementation Method 1

the bend has a curved screen through which liquid is withdrawn from the goods and discharged

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 2

sieve centrifuge with at least one inlet bend, which is connected upstream of an inlet of the screen centrifuge

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentEP2998028B1Inlet bender with curved screen

Publication Date: 2017.05.10 SIEBTECHN

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AI summary

The invention relates to an inlet manifold (1), in particular for a screen centrifuge, wherein the inlet manifold (1) has a bend (8) in which the material to be transported is deflected and wherein the bend (8) has a curved screen (6) through which liquid is extracted from the material and discharged. The invention further relates to a screen centrifuge with such an inlet manifold (1) and to a method for dewatering moist granules, in particular moist plastic granules, wherein the moist granules are passed through an inlet manifold (1) which has a bend (8) with a curved screen (6) through which liquid is extracted from the moist granules and discharged.