Retrofit Vibrating Screen Dewatering Aggregate Fines
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Solution Overview
Problem
Existing dewatering systems for aggregate products like sand, gravel, and ore are inefficient, leading to loss of valuable fines and high power consumption, making them costly and ineffective, especially when trying to retrofit existing facilities with modern technology.
Innovation Solution
A portable or stationary retro-fit dewatering device that includes a vibrating screen with a recycle system, allowing fine materials to be captured and re-dried, reducing power consumption and increasing efficiency by using a vibrating system with motors and flywheels, and incorporating an underflume for recycling water and fines back into the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an inclined screw dehydrator is used to dewater fine granular material, then the equipment structure is simple and easy to operate, but the water handling capacity is limited and valuable fines are lost in the back flow
Solution Approach 1:
The patent combines a vibrating screen with a screw conveyor to merge the advantages of both devices. The vibrating screen provides high water handling capacity and fine material retention, while the screw conveyor maintains simple structure and ease of operation. This hybrid system resolves the contradiction by integrating two different mechanisms rather than relying on the screw dehydrator alone.
Solution Approach 2:
The patent introduces a vibrating screen that uses mechanical vibration to separate water from aggregate material. The vibration allows water to pass through the screen while retaining fine materials, significantly increasing water handling capacity compared to a standard screw dehydrator while preventing fines loss through the back flow.
2Productivity
If a centrifuge apparatus is used to remove free moisture, then the dewatering efficiency is high, but the cost is high, power consumption is high, and wear characteristics are poor
Solution Approach 1:
The patent uses a vibrating screen instead of a centrifuge to achieve dewatering. The mechanical vibration method consumes significantly less power than centrifugal force while still providing effective water removal. The screen vibrates at controlled frequencies to separate water from material without the high energy demands of centrifugal acceleration.
Solution Approach 2:
The patent replaces the centrifugal mechanical system with a vibrational mechanical system. Instead of using centrifugal force generated by rotation, the system uses controlled vibrations to achieve separation, reducing power consumption and wear while maintaining dewatering effectiveness.
3Productivity
If pressure or vacuum filters are used for dewatering, then the dewatering effectiveness is improved, but the equipment cost is high and commercial attractiveness is reduced
Solution Approach 1:
The patent employs a vibrating screen as a simpler, more cost-effective alternative to pressure or vacuum filters. The mechanical vibration approach achieves effective dewatering without requiring complex filtration systems, pressure vessels, or vacuum equipment, thereby reducing manufacturing costs while maintaining dewatering effectiveness.
Solution Approach 2:
The patent uses a relatively simple vibrating screen mechanism that is less expensive to manufacture and replace compared to complex filtration systems. The screen can be easily replaced if needed, providing a cost-effective solution that maintains dewatering effectiveness without the high capital investment required for pressure or vacuum filters.
4Productivity
If vibrating dewatering screens with woven wire cloth or urethane decks are used, then the dewatering function is achieved, but the horsepower consumption is high
Solution Approach 1:
The patent optimizes the vibration parameters of the screen, including frequency, amplitude, and motion pattern, to achieve effective dewatering with minimum energy consumption. By carefully selecting and adjusting these parameters, the system reduces horsepower requirements while maintaining dewatering performance.
Solution Approach 2:
The patent uses mechanical vibration with optimized characteristics to achieve dewatering. The vibrating screen employs controlled vibration frequencies and amplitudes that are sufficient to separate water from material but consume less power than conventional high-energy vibrating screen systems.
5Productivity
If existing dewatering systems are replaced with modern systems, then the dewatering efficiency is improved, but the installation cost is high and retro-fit is not cost effective
Solution Approach 1:
The patent combines a vibrating screen with an existing screw conveyor system, allowing retro-fit of modern dewatering technology without complete system replacement. This integration approach improves dewatering efficiency while minimizing installation costs by utilizing existing infrastructure.
Solution Approach 2:
The vibrating screen system is designed to be universally compatible with existing screw conveyor systems, allowing it to be adapted to various installations. This multi-functionality enables the system to improve dewatering efficiency across different applications without requiring custom-built solutions, thereby reducing retro-fit costs.
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 enhances the efficiency of dewatering processes by capturing more dried aggregate product while minimizing power consumption and installation costs, allowing the system to be easily integrated with existing conveyor systems, achieving moisture content as low as 8% in a short time and reducing horsepower requirements by up to one-third.
Implementation Method 1
The screen is movable or otherwise vibrating, such as in two directions. A vibrating system, such as motors, flywheels, or some combination thereof, provides the movement to the screen.
Implementation Method 2
Another technique involves the use of centrifugal force to remove the free moisture.
Implementation Method 3
The underflume includes an aperture at a lowest point for directing the water and fine materials.
Data Source
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AI summary
A dewatering device for aggregate product can be used to retro-fit existing aggregate product dewatering facilities in order to more efficiently capture product. The dewatering device can be movable to allow for the portability of the device relative to existing dewatering facilities. The device is adapted to receive a slurry of aggregate product and water and to vibrate to dry the aggregate product. A recycle system is included to receive any fines that may otherwise be lost by the system. The recycle system captures the fines and redirects them back towards the vibrating process of the vibrating device to direct them towards an exit of the vibrating device in order to use said fines as well as the other dewatered aggregate product. The portability of the device allows the device to be used with the existing facilities without the need to completely replace existing components for dewatering aggregate product.