Earthen Slurry Dewatering via Segmented Separation
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Solution Overview
Problem
Current systems for processing earthen slurries, such as those from drilling and potholing, face challenges in efficient dewatering and disposal, leading to high landfill costs and regulatory issues, with existing methods often causing blinding and wear in processing equipment.
Innovation Solution
A system comprising a dumping station, a holding tank, and a drag-slat conveyor with a first separation unit having mesh openings to separate solids from liquids, followed by a second separation unit for further processing, allowing for continuous operation and reduced wear, enabling simultaneous processing and dumping of multiple loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single separation unit with fine mesh openings is used to separate solids from liquids, then separation precision is improved, but the equipment is prone to blinding and wear
Solution Approach 1:
The separation system is divided into multiple stages: a first separation unit with larger mesh openings to remove coarse solids, and a second separation unit with finer mesh openings to separate smaller particles. This segmentation allows each unit to operate at optimal mesh size, preventing blinding in the fine mesh unit while maintaining high separation precision.
2Manufacturing precision
If the system processes multiple slurry loads sequentially, then processing thoroughness is improved, but productivity is reduced due to repeated setup and dumping operations
Solution Approach 1:
The system incorporates a holding tank that can store multiple loads of slurry, allowing the separation units to operate continuously without interruption. While one load is being processed, the next load can be loaded into the holding tank, eliminating idle time and maintaining continuous productive operation.
Solution Approach 2:
The holding tank pre-stores additional slurry loads before processing begins, and the system can pre-position components for the next load. This preliminary preparation ensures that when one load completes processing, the next load is already ready to be processed without interruption.
3Reliability
If the system is designed as a fixed installation to ensure processing stability, then reliability is improved, but adaptability to different sites is reduced
Solution Approach 1:
The system is designed with mobile components including a trailer-mounted holding tank and transportable separation units. This dynamic design allows the system to be easily relocated to different sites while maintaining stable and reliable operation at each location, combining the benefits of mobility with processing stability.
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 system effectively separates solids from liquids, reducing wear and blinding in processing equipment, allowing for efficient dewatering and enabling the system to be mobile and easily transported to different sites, thereby addressing the challenges of high disposal costs and regulatory compliance.
Implementation Method 1
The first separation unit has openings for separating the solids fraction from the liquid fraction
Implementation Method 2
A second separation unit separates the solids fraction from the liquid fraction from the first effluent from the first separation unit. The first separation unit has openings with a size greater than the size of the openings of the second separation unit.
Data Source
AI summary
Systems and methods for processing earthen slurries such as slurries of earth cuttings and, in particular, systems and methods that involve two separation units for dewatering the slurry or that involve additive mixing units are disclosed. The systems and methods may include a conveyor such as a drag-slat conveyor that removes slurry from a holding tank at which the material is dumped and toward the separation units to allow the material to be continuously processed and dumped into the holding tank.