Rotary Fan Press Liquid Extraction with Inflatable Seal
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Solution Overview
Problem
Existing liquid extraction machines are inefficient in separating liquid from sludges and slurries, particularly in industries like pulp and paper, wastewater treatment, and food processing, as they lack effective mechanisms to enhance liquid extraction and solid separation.
Innovation Solution
A liquid extraction assembly with a rotating screen and inflatable member that forces liquid through elongated slots, aided by a center seal and fixed scraper for cleaning, and an annular seal for maintaining pressure and controlling the outlet, enhancing the separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary fan press is used for liquid extraction, then liquid can be separated from sludge, but the separation efficiency is insufficient and bridging/bindings occur
Solution Approach 1:
The filter element is divided into multiple sections with individual adjustment mechanisms, allowing different zones to be optimized for different sludge characteristics and preventing bridging by enabling localized pressure control
Solution Approach 2:
The system employs adjustable parameters including variable pressure differential, controllable filtration area, and adjustable filter element position, enabling dynamic optimization of extraction efficiency while preventing binding
2Productivity
If the filtration area is increased to improve extraction, then liquid removal increases, but the device complexity and maintenance difficulty increase
Solution Approach 1:
The filter element serves multiple functions: filtration, pressure distribution, and structural support, reducing the need for additional components and simplifying the overall device structure while maintaining high extraction capacity
Solution Approach 2:
The housing integrates the filter element, pressure differential mechanism, and support structure into a unified assembly, reducing the number of separate components and simplifying maintenance procedures
3Reliability
If the filter element is made adjustable to prevent bridging, then separation quality improves, but the ease of operation and maintenance decreases
Solution Approach 1:
The system automatically adjusts pressure distribution and filtration parameters based on sludge flow characteristics, eliminating the need for manual intervention and simplifying operation while maintaining high separation quality
Solution Approach 2:
The adjustable parameters are designed to respond automatically to operational conditions, allowing the system to self-regulate pressure differential and filtration area to prevent bridging without complex user control
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 solution effectively separates liquid from solid, improving the efficiency of liquid extraction and solid disposal, reducing bridging and binding issues, and facilitating easy cleaning and maintenance.
Implementation Method 1
Pressure from mass forced into the input presses the mass against the slots of the rotating screen to thereby force at least a portion of liquid in the mass to pass through the elongated slots
Implementation Method 2
The housing includes an inflatable member providing a seal adjacent the at least one rotating screen for maintaining the mass in the path
Implementation Method 3
at least one fixed scraper in the path and adjacent the at least one rotating screen, with the at least one fixed scraper cleaning the at least one rotating screen as the rotating screen is rotated past the at least one fixed scraper
Implementation Method 4
The housing has a nozzle at the inlet such that the mass entering the path is a greater velocity than the mass entering the nozzle
Data Source
AI summary
A liquid extraction assembly for extracting liquid from a mass comprising a housing having an inlet and an outlet and a path therebetween. The housing includes a rotating screen adjacent the path. The housing can have a nozzle at the inlet. The housing can include an inflatable member providing a seal adjacent the screen for maintaining the mass in the path. The housing can include a center seal rotating with the screen and a fixed scraper in the path and adjacent the at least one rotating screen, with the center seal including a notch for accepting a tip of the scraper therein. The housing can also include side walls and an annular seal located between the side walls, with the annular seal defining an outer periphery of the path and having a rotating top end portion allowing an area of the outlet to change.