Rake-Free Thickener With Driving Zone And Defoaming
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Solution Overview
Problem
Large-scale coal washing plants face inefficiencies in slime water treatment due to short settlement times and poor settlement effects in traditional thickening devices, leading to residual coal foams and increased land occupation with multi-stage concentration processes, resulting in economic losses and environmental impact.
Innovation Solution
A rake-free thickening device with a driving area, incorporating a feed assembly, diversion assembly, and clean coal collection area, utilizing a central tank with defoaming zones and magnetic concentrating showers to enhance sedimentation and foam recovery, reducing land use and increasing coal recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the thickening device diameter is increased to handle larger processing capacity, then the processing volume increases, but the settlement time becomes shorter and settlement effect deteriorates
Solution Approach 1:
The thickening device is divided into multiple functional zones: a central reaction zone where bubbles carry fine slime upward, an outer diversion and settlement zone where slime water overflows and settles, and intermediate driving zones. This segmentation allows different regions to perform specialized functions, maintaining effective settlement despite large overall diameter.
Solution Approach 2:
Bubbles are introduced as an intermediary carrier to transport fine slime particles upward from the central tank. This mediator enables effective separation and transport of fine particles without relying solely on gravitational settlement, solving the problem of poor settlement effect in large-diameter devices.
2Manufacturing precision
If multi-stage concentration is added to further purify washing circulating water, then the purification effect improves, but the occupied land area increases significantly
Solution Approach 1:
Multiple functional stages (reaction, thickening, defoaming, and settlement) are merged into a single integrated device structure. The central tank handles reaction and initial separation, while the outer annular region handles overflow and final settlement, eliminating the need for separate multi-stage concentration equipment and reducing land occupation.
Solution Approach 2:
The device utilizes vertical zonation within a single footprint, with the central tank for rising bubbles and the outer annular region for overflow settlement. This three-dimensional utilization of space achieves multi-stage purification effects without proportionally increasing land area.
3Manufacturing precision
If traditional multi-stage thickening tanks are used, then the settlement effect is adequate, but the occupied area is large
Solution Approach 1:
The device nests multiple functional zones within each other: the central reaction tank is nested within the outer diversion and settlement zone. This nested configuration allows multiple settlement stages to occur concentrically within a compact footprint, significantly reducing occupied area compared to traditional multi-stage tanks arranged in sequence.
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 device integrates multi-stage thickening, reduces land occupation, enhances coal recovery, and improves sedimentation efficiency, achieving better separation of coal and water while minimizing pollution and economic waste.
Implementation Method 1
The bubbles carry the fine slime up after reacting, the driving zone drives the dispersed bubbles to the defoaming zone
Implementation Method 2
The magnetic gathering sprayer is set up to use magnetic particles as the magnetic seed to strengthen the adhesion of the flocculant
Implementation Method 3
accelerating the adhesion of the fine mud and the flocculant, realizing the accelerated sedimentation of the fine mud
Implementation Method 4
strengthen the adhesion of the flocculant, thereby accelerating the adhesion of the fine mud and the flocculant
Implementation Method 5
The setting of the high and low baffles in the diversion settling screen can make the slime water obtain sufficient settling time in the limited space and achieve the full sedimentation of the fine mud
Data Source
AI summary
Disclosed is a rake-free thickening device including driving area. The device includes a feed assembly, a diversion assembly and a clean coal collection assembly. The clean coal collection assembly includes a driving area. The diversion assembly includes a central tank. Slime water passes through the feed assembly and flows with a medicament from an upper part of the central tank to a middle of the central tank, and then diffuses around. Bubbles carry the fine slime up after reacting. The driving zone drives the dispersed bubbles to a defoaming zone located in the middle of the central tank. The slime water in the central tank flows through the central tank after defoaming. With the continuously filling of slime water, the slime water above the central tank overflows the central tank to the clean coal collection assembly within the diversion and settlement area.