Depolymerization Liquid Generation System with Concentration and Condensation
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Solution Overview
Problem
The existing depolymerization systems using high-temperature and high-pressure water to recycle waste plastics result in a depolymerization liquid with excessive water content, leading to increased transportation costs and the risk of freezing during winter transport.
Innovation Solution
A depolymerization liquid generation system that includes a kneader for waste plastics and a predetermined liquid, a heat exchanger to cool and concentrate the depolymerization liquid, and a condensing device to generate a condensed liquid, which is then reused, reducing the water content and transportation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-temperature and high-pressure water is used as a medium for depolymerization reaction, then waste plastics can be effectively recycled, but the water content in the depolymerization liquid increases significantly
Solution Approach 1:
The patent extracts and removes excess water from the depolymerization liquid through concentration processing. The system separates the depolymerization liquid into concentrated depolymerization liquid and water, removing the harmful excess water while retaining the useful depolymerization products for fuel generation.
Solution Approach 2:
The patent changes the concentration parameter of the depolymerization liquid by implementing a concentration process. The system transforms the low-concentration depolymerization liquid (with excessive water) into high-concentration depolymerization liquid, thereby altering the physical and chemical properties to reduce freezing risk and transportation costs.
2Productivity
If the water content in depolymerization liquid increases, then the depolymerization reaction can proceed, but the transportation cost increases and freezing risk arises
Solution Approach 1:
The patent discards the excess water from the depolymerization liquid through concentration, and recovers the concentrated depolymerization liquid for fuel generation. This separation allows the system to eliminate the harmful component (excess water causing high transportation cost and freezing risk) while recovering and utilizing the valuable component (depolymerization products).
Solution Approach 2:
The patent utilizes phase transition of water from liquid to vapor through heating in the concentration process. The water in the depolymerization liquid undergoes phase change and is removed as vapor, leaving behind the concentrated depolymerization liquid with reduced water content.
3Loss of energy
If concentrated depolymerization liquid is generated by removing water, then transportation cost decreases, but additional processing equipment and energy are required
Solution Approach 1:
The patent merges the concentration and condensation processes into an integrated system where the condensation device is directly connected to the concentration device. The condensed water from the condensation process is reused in the depolymerization reaction, creating a closed-loop system that reduces overall equipment requirements and water consumption.
Solution Approach 2:
The patent implements self-service by reusing the condensed water from the condensation process back in the depolymerization reaction as the liquid medium. This internal recycling eliminates the need for external water supply and reduces the overall water consumption and equipment complexity of the system.
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 efficiently reduces the water content in the depolymerization liquid, lowering transportation costs and mitigating the risk of freezing, while effectively recycling waste plastics by reusing the condensed liquid in the depolymerization process.
Implementation Method 1
a depolymerization liquid concentration device configured to heat the depolymerization liquid generated by the depolymerization liquid generation device to separate the depolymerization liquid into concentrated depolymerization liquid and gas
Implementation Method 2
a condensing device configured to condense the gas separated by the depolymerization liquid concentration device to generate condensed liquid
Data Source
AI summary
A depolymerization liquid generation system includes: a depolymerization liquid generation device configured to knead waste plastics and predetermined liquid to generate depolymerization liquid; a depolymerization liquid concentration device configured to heat the depolymerization liquid generated by the depolymerization liquid generation device to separate the depolymerization liquid into concentrated depolymerization liquid and gas; and a condensing device configured to condense the gas separated by the depolymerization liquid concentration device to generate condensed liquid. The depolymerization liquid generation device includes a kneader configured to knead the waste plastics and the predetermined liquid. The condensed liquid generated by the condensing device is mixed into the kneader.