Sludge Dewatering Column with Periodic Fines Discharge
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Solution Overview
Problem
Waste water sludge from settlement or thickener tanks poses challenges due to high water content and fine solid particles that rapidly block filtration materials, leading to high energy consumption and operational costs in existing dewatering processes.
Innovation Solution
A method and apparatus involving a vertically mounted column with controlled closures and sensors to periodically discharge settled fines while retaining water, utilizing a porous barrier to reduce water content and prevent fine particle blockages, allowing for efficient recycling of water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If filter presses or belt presses are used to dewater sludge, then water content is reduced, but fine solid particles rapidly block filtration materials and energy consumption increases
Solution Approach 1:
The invention extracts and removes fine solid particles from the waste water stream before dewatering operations. The extraction device separates fines from the water-fine mixture, allowing the water to be dewatered without the harmful fine particles that would block filtration materials and increase energy consumption.
Solution Approach 2:
The invention introduces an intermediary extraction device between the settlement/thickener tank and the dewatering equipment. This intermediary component processes the sludge by removing fine particles, thereby protecting the subsequent dewatering equipment from blockages and reducing its energy consumption.
2Quantity of substance
If filter presses or belt presses are used to dewater sludge, then water content is reduced, but filtration materials are rapidly blocked by fine solid particles
Solution Approach 1:
The invention extracts and removes fine solid particles from the waste water stream before dewatering operations. The extraction device separates fines from the water-fine mixture, allowing the water to be dewatered without the harmful fine particles that would block filtration materials and increase energy consumption.
Solution Approach 2:
The invention introduces an intermediary extraction device between the settlement/thickener tank and the dewatering equipment. This intermediary component processes the sludge by removing fine particles, thereby protecting the subsequent dewatering equipment from blockages and reducing its energy consumption.
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 reduces water content in waste water sludge, preventing blockages and lowering operational costs by allowing for periodic discharge of settled fines, facilitating the recycling of water from waste water streams.
Implementation Method 1
permitting fines to settle to a lower end of the column
Implementation Method 2
a porous barrier for selectively closing a lower end of the column, the porous barrier communicating with a pressure reduction device for drawing water out of a lower end of the column through the porous barrier
Data Source
AI summary
An apparatus for reducing the water content of waste water sludge includes a column for receiving waste water sludge, an outlet at a lower end of the column, a first closure for closing the outlet of the column, a controller for controlling the opening and closing of the closure. The controller is adapted to open and close the first closure to periodically discharge amounts of settled fines from the lower end of the column. A water outlet is adapted to receive water overflowing from an upper end of the column.