Briquette Binder from Modified Landfill Leachate
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Solution Overview
Problem
The rapid increase in energy consumption and urban waste in China leads to environmental pollution and inefficient energy utilization, as existing methods for waste disposal and energy production do not effectively utilize waste products like landfill leachate, resulting in land occupation and secondary pollution.
Innovation Solution
A method involving the preparation of a briquette binder using modified landfill leachate and rice straws, where landfill leachate is sulfonated and aminated, then mixed with modified rice straws to create a binder, which is used to produce industrial briquettes with coal powder, petroleum coke, and a sulfur-fixing agent, enhancing energy utilization and reducing waste disposal costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If landfill leachate is disposed of by conventional methods (piling or open burial), then the disposal process is simple, but it occupies large land area and causes secondary pollution to soil, groundwater and atmosphere
Solution Approach 1:
The patent converts harmful landfill leachate into a valuable resource by using it as raw material for producing briquette binder. The leachate undergoes sulfonation and amination reactions to form modified products that serve as adhesive binders for coal briquettes, thereby eliminating pollution while creating economic value
Solution Approach 2:
The patent transforms the chemical parameters of landfill leachate through controlled sulfonation and amination reactions. By adjusting reaction conditions (temperature, reagent ratios, reaction time), the leachate is converted from a harmful waste stream into a functional binder material with specific adhesive properties required for briquette production
2Strength
If humic acid alkali solution is used as briquette binder, then the binder has strong adsorption force and adhesive property, but the preparation process is complex and costly
Solution Approach 1:
The patent enables landfill leachate to self-transform into a functional binder through chemical modification. The leachate naturally contains organic compounds that, when sulfonated and aminated, develop binding properties similar to humic acid but through a more straightforward process that utilizes the leachate's existing composition rather than requiring complex extraction and purification steps
3Reliability
If traditional briquette production methods are used, then the production process is established and reliable, but energy utilization is inefficient and waste products are not recovered
Solution Approach 1:
The patent introduces a multi-functional approach where landfill leachate serves multiple purposes: it acts as both the binding agent and the source of organic content for the briquettes. This eliminates the need for separate binder production and waste treatment processes, thereby improving energy utilization efficiency while maintaining production reliability
Solution Approach 2:
The patent recovers value from previously discarded landfill leachate by transforming it into a useful binder material. Instead of discarding the leachate through conventional disposal methods, the process recovers its potential by chemical modification to create a functional component in briquette production, thereby reducing energy waste and improving overall efficiency
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 method effectively utilizes landfill leachate to produce high-strength, long-lasting industrial briquettes suitable for steam or metallurgical coal, reducing environmental impact and increasing economic benefits by converting waste into a valuable energy source.
Implementation Method 1
adding a sulfonating agent according to a mass ratio of the landfill leachate concentrate to the sulfonating agent of 10:1-1.5 to react for 2-3h
Implementation Method 2
adding an amination reagent according to a mass ratio of the landfill leachate concentrate to the amination reagent of 10:0.5-0.9; and after the reaction is completed
Implementation Method 3
heating and drying under continuous stirring, to prepare a required brown yellow powdery briquette binder
Implementation Method 4
The hydrophilic reversible colloid has a large surface area and has the adhesive property of colloid and strong adsorption force
Data Source
AI summary
A method for preparing a briquette binder using a landfill leachate and a method for producing an industrial briquette using the briquette binder. The landfill leachate is modified by sulfonation and amination, and is mixed with the modified rice straws to prepare the briquette binder, so as to effectively use the products generated in garbage processing to realize secondary economic benefits in garbage processing. The industrial briquette is produced by the prepared briquette binder, and the industrial briquette is used as steam coal or metallurgical coal with large briquette consumption, so as to promote the resource utilization of the landfill leachate, reduce the cost in preparation of the briquette binder and enhance benefits.