Rotating Screen Diverter for Waste Grinder Clog Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wastewater channel grinding systems face issues with the accumulation of solids within rotating drum screens, leading to reduced liquid capacity and premature system failure.
Innovation Solution
A grinding and screening machine that combines a rotatable screen with a stationary screen to create a composite fine screen at the inlet and a coarser screen at the outlet, minimizing solid accumulation by interleaving ribs on both screens to enhance solid transfer to cutters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single rotatable drum screen is used for screening solids, then the screening function is provided, but solid accumulation occurs within the drum screen over time degrading liquid capacity
Solution Approach 1:
The single drum screen is segmented into two functional zones: an inlet side with fine screening capability and an outlet side with coarser screening. The inlet side captures solids efficiently, while the outlet side allows accumulated solids to be discharged, preventing clogging and maintaining liquid capacity throughout operation.
Solution Approach 2:
The drum screen operates dynamically by rotating to different orientations. During operation, the inlet side faces upstream to capture solids, then rotates to position the outlet side downstream for solid discharge. This dynamic repositioning prevents permanent clogging and maintains continuous screening efficiency.
2Reliability
If the rotatable screen is positioned away from the cutter assembly, then solids can be screened, but solids may bypass the cutters reducing grinding effectiveness
Solution Approach 1:
The screening function and grinding function are merged into a single integrated unit. The drum screen is positioned immediately adjacent to the cutter assembly, creating a combined screen-grinder unit where screened solids are directly fed to the cutters without bypassing them, ensuring all solids receive both screening and grinding treatment.
3Ease of manufacture
If screens are located far from the cutter assembly, then solids can be screened separately, but transfer of solids to cutters is inefficient
Solution Approach 1:
The screen and cutter assembly are merged into a tight integrated unit with minimal spacing. The drum screen rotates directly over the cutter assembly, creating a gravity-fed transfer mechanism where screened solids naturally drop onto the cutters, maximizing transfer efficiency without complex conveyance mechanisms.
Data Source
AI summary
The present invention relates to comminutors for breaking down waste and, more particularly, comminutors having a screen that rotates for directing large waste particles into a cutting assembly. In addition to a rotating screen, a second, stationary screen is provided that has horizontal ribs adapted to cooperate with interleaved ribs on the rotating screen so as create a composite fine screen at an inlet end of the comminutor, while creating a coarse screen at the outlet end of the comminutor.