Multi-Layer Geotextile Bags with Horizontal Drain Boards for Dewatering
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Solution Overview
Problem
Existing sludge treatment methods using sealed geotextile bags are slow, inefficient, and environmentally unfriendly, with prolonged dehydration times, resource-intensive manufacturing, and inability to reuse the bags, leading to increased construction and economic costs.
Innovation Solution
A sludge treatment system utilizing a horizontal drain board vacuum preloading method combined with multi-layer sealed geotextile bags, featuring a horizontal drainage system and flocculation process, manufactured on an industrial assembly line, which includes a horizontal drain board system with multiple layers of geotextiles and geomembranes, and a sealing structure to enhance drainage efficiency and allow reusability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional sealed geotextile bags are used for sludge treatment, then the structure is simple, but the drainage speed is too slow and dehydration effect is insufficient
Solution Approach 1:
The geotextile bag is divided into multiple functional layers including drainage layers, sealing layers, and reinforcement layers. Each layer performs a specific function (drainage, containment, structural support), transforming a single slow-draining bag into a multi-layer system that accelerates water removal while maintaining manageable structural complexity through modular design
Solution Approach 2:
The invention transitions from traditional vertical stacking to horizontal arrangement of multiple geotextile bags. This dimensional change allows vacuum preloading to act more effectively across the sludge mass, creating multiple drainage pathways and significantly increasing the overall drainage speed without proportionally increasing structural complexity
2Productivity
If traditional sealed geotextile bags are used, then manufacturing is simple, but the treatment cycle is prolonged to one to two months
Solution Approach 1:
The system applies vacuum preloading before final sludge dewatering. This preliminary action removes free water and reduces sludge volume in advance, creating a more favorable state for subsequent processing and significantly reducing the overall treatment time from months to days
Solution Approach 2:
The invention introduces a vacuum preloading system that uses negative pressure (pneumatics) to accelerate water removal from sludge. This hydraulic/pneumatic mechanism dramatically increases dehydration efficiency compared to passive gravitational drainage, reducing treatment time while maintaining simple manufacturing processes
3Object-affected harmful factors
If ordinary sealed geotextile bags are used, then resource consumption is high due to single-use disposal, but the discharged water is turbid and cannot be reused
Solution Approach 1:
The geotextile bags utilize porous fabric materials that allow water to pass through while retaining solid particles. This porous structure naturally filters the discharged water, improving water quality to reusable standards while the durable geotextile materials can be cleaned and reused multiple times, reducing resource consumption and waste
Solution Approach 2:
The invention enables recovery and reuse of both the discharged water (through natural filtration by porous geotextiles) and the geotextile bags themselves (through cleaning and repeated use). This transforms the traditional single-use disposal model into a circular economy approach, reducing resource consumption and environmental impact
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 significantly accelerates drainage by 30-40 times compared to traditional methods, reduces costs, and allows for the reuse of geotextile bags, while ensuring clean discharge water and enabling the production of reusable bricks from treated sludge.
Implementation Method 1
A pressure difference is formed between inside and outside of the sealed geotextile bag in pumping and drainage
Implementation Method 2
combining with flocculant to dehydrate the mud
Data Source
AI summary
In the invention, a sludge treatment technology adopting flocculation-horizontal drain board vacuum preloading combining multi-layer sealed geotextile bag is disclosed, which comprises sealed geotextile bags and a geomembrane for sludge grouting and filling. The sealed geotextile bag and the geomembrane have two splicing modes, one is to place a layer of geomembrane inside and close to the inner side of the sealed geomembrane; the other is to wrap and seal the outside of the geotextile with geomembrane. A horizontal drainage system for vacuum drainage is set inside the sealed geotextile bag, with one end of the horizontal drain board being connected to a vacuum drainage pipe, and the drainage pipe passes through the sealed geotextile bag via a flange and is connected to the vacuum pump used for pumping the water in the sealed geotextile bag. Sludge includes engineering waste mud, river sludge and industrial sludge. A horizontal drainage system is added inside the sealed geotextile bag and combining with flocculant for sludge dewatering, and the sealed geotextile bag can be stacked in several layers to form a stacking effect on the lower structure through the self weight of the upper layer, thus making the drainage effect faster and the dewatering efficiency higher.