Sludge Concentration Device Using Chemical Conditioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sludge treatment methods are inefficient in concentrating and conditioning sludge due to high moisture content, leading to increased transportation and storage costs, environmental pollution, and prolonged concentration times, with existing devices failing to effectively reduce sludge volume and facilitate subsequent treatment processes.
Innovation Solution
A sludge concentration and conditioning device comprising a storage tank with a filtering system, additive feed, and adjustable sludge management, which enables continuous solid-liquid separation, rapid concentration, and conditioning through the use of additives, allowing for efficient sludge processing and adjustment of concentration levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gravity concentration by natural sedimentation is used, then sludge can be separated from water, but the concentration process takes more than ten hours and produces anaerobic environment with high phosphorous content
Solution Approach 1:
The patent applies preliminary action by adding coagulants and flocculants to sludge before the concentration process to pre-condition the sludge particles. This preliminary chemical treatment causes particles to aggregate into larger flocs that settle much faster, reducing concentration time from over ten hours to under two hours while maintaining separation quality through the filtering device.
2Object-affected harmful factors
If aeration and stirring are applied to reduce phosphorous emission, then phosphorous content in sludge is reduced, but the concentration efficiency decreases and moisture content remains high
Solution Approach 1:
The patent applies preliminary action by adding coagulants and flocculants to sludge before the concentration process to pre-condition the sludge particles. This preliminary chemical treatment causes particles to aggregate into larger flocs that settle much faster, reducing concentration time from over ten hours to under two hours while maintaining separation quality through the filtering device.
Solution Approach 2:
The patent changes the chemical parameters of sludge by adding coagulants (such as aluminum sulfate or ferric chloride) and flocculants (such as polyacrylamide). These chemical additions alter the surface charge and aggregation properties of sludge particles, enabling them to form larger, denser flocs that settle rapidly and produce low-phosphorous concentrate without requiring prolonged aeration or stirring.
3Reliability
If air floatation is used to concentrate sludge, then sludge particles can be separated, but the method is still time-consuming and requires sludge particles to be of suitable size
Solution Approach 1:
The patent applies preliminary action by adding coagulants and flocculants to sludge before the concentration process to pre-condition the sludge particles. This preliminary chemical treatment causes particles to aggregate into larger flocs that settle much faster, reducing concentration time from over ten hours to under two hours while maintaining separation quality through the filtering device.
4Productivity
If centrifugal concentration is used to separate sludge from water, then concentration can be achieved, but complicated and expensive dedicated equipment is required
Solution Approach 1:
The patent extracts the essential concentration function from complex centrifugal equipment and implements it through a simple gravity-based system enhanced by chemical conditioning. By removing sludge from the liquid phase through natural settling aided by coagulants and flocculants, and using a straightforward filtering device, the system achieves effective concentration without requiring complicated centrifugal machinery.
Solution Approach 2:
The patent replaces expensive, complex centrifugal equipment with inexpensive, simple components including settling tanks, basic filtering devices, and chemical dosing systems. This substitution uses readily available, low-cost materials and methods to achieve the same concentration objective, dramatically reducing equipment complexity and investment costs.
5Ease of manufacture
If sludge is treated by natural storage or landfill, then sludge can be disposed, but transportation and storage costs are high and environmental pollution occurs
Solution Approach 1:
The patent changes the physical and chemical parameters of sludge through concentration and conditioning, transforming it from a high-moisture, bulky, polluting material into a concentrated, stable, and easier-to-handle substance. This parameter transformation reduces sludge volume by separating water, adjusts moisture content to facilitate safe disposal, and eliminates the need for expensive landfilling or long-term storage, thereby reducing both costs 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 device significantly reduces sludge concentration time from over ten hours to under two hours, enhances treatment efficiency, and allows for better sludge conditioning, thereby minimizing environmental impact and operational costs while occupying a smaller area.
Implementation Method 1
a filtering device disposed inside the storage tank and used for filtering the sludge within the storage tank so as to achieve solid-liquid separation
Implementation Method 2
Additives can be added to change the properties of sludge, destroy the structure of sludge colloids, reduce hydrophilia of sludge and improve the dewatering performance of sludge
Data Source
AI summary
The present invention relates to a sludge concentration and conditioning device, and a method for treating sludge by using the same. To be specific, there is provided a sludge concentration and conditioning device, comprising: a storage device used for receiving and accommodating sludge and including a body and a cover, the body being provided with a sludge outlet and an overflow port, and the cover including a gas outlet for discharging gas; a filtering device disposed between the sludge outlet and the overflow port and used for filtering the sludge so as to achieve solid-liquid separation; a sludge feed device used for conveying sludge from below the filtering device into the storage device; an additive feed device used for conveying an additive from below the filtering device into the storage device; a sludge discharging device connected to the sludge outlet and used for discharging concentrated and conditioned sludge; and a concentrated sludge adjusting device including an adjusting tank in fluid communication with and surrounding the storage device, and used for adjusting the amount of concentrated sludge in the storage device according to the conditioning requirements. The present invention also provides a method for treating sludge by using the sludge concentration and conditioning device.