Continuous Reactor Heat Recovery and Segmented Design
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Solution Overview
Problem
Existing chemical reactors face inefficiencies due to ineffective utilization of heat generated during reactions and low production efficiency, as they operate intermittently and require significant energy for temperature regulation, leading to waste and reduced productivity.
Innovation Solution
A continuous reactor design featuring a main reaction housing with a stirring device and temperature regulation, surrounded by auxiliary housings with a shared reaction cavity, allowing for continuous material flow and heat reuse, along with additional features like multiple temperature regulators, circulation systems, and filter screens to enhance reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reaction kettle is used for intermittent batch reaction, then temperature regulation can be performed on the reaction material, but the production efficiency is low and the reaction rate is slow
Solution Approach 1:
The patent implements continuous reaction by configuring multiple reaction vessels (first reaction vessel, second reaction vessel, third reaction vessel) that operate in sequence. While one vessel is reacting, another is being discharged and prepared, eliminating idle time between batches. The material continuously flows through the system via the overflow hole and pump, maintaining uninterrupted reaction process and significantly improving production efficiency compared to intermittent batch operation.
2Temperature
If cooling water or other coolants are used to lower the temperature during exothermic reaction, then the temperature can be regulated, but the heat generated by the reaction process is wasted and lost
Solution Approach 1:
The patent converts the waste heat from exothermic reactions into a useful resource by using it to preheat the raw material before it enters the reaction vessel. The heat exchanger is configured to exchange heat between the outgoing reaction product (which is hot) and the incoming raw material (which needs heating). This transforms the harmful waste heat that would otherwise be lost to the environment into beneficial preheating energy, reducing or eliminating the need for external heating and significantly improving energy efficiency.
Solution Approach 2:
The system implements heat feedback by using the thermal energy from the reaction product to continuously preheat the incoming raw material. The heat exchanger creates a closed-loop thermal feedback system where the output heat is fed back to the input, automatically regulating the temperature of the raw material before it enters the reactor without requiring external energy input.
3Productivity
If multiple reaction vessels are configured for continuous reaction, then production efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent divides the continuous reaction system into three distinct reaction vessels (first, second, and third reaction vessels) that can operate independently yet cooperatively. Each vessel is equipped with its own stirring device and temperature control system. This segmentation allows continuous production while maintaining operational simplicity, as each vessel can be independently maintained, cleaned, or adjusted without shutting down the entire system.
Solution Approach 2:
The patent designs all three reaction vessels with identical structures and equivalent functional components (stirring devices, temperature control systems, overflow holes). This universality means that any vessel can perform the same reaction function, and spare parts or operational procedures can be standardized across all vessels, reducing the actual operational complexity despite the increased number of components.
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
This design enables continuous production, efficient heat utilization, and increased reaction intensity, resulting in improved production efficiency and reduced energy consumption, as demonstrated by the example of poly urea-formaldehyde slow-release nitrogen fertilizer production.
Implementation Method 1
a first temperature regulating device... Temperature regulation is performed on the reaction raw material through the first temperature regulating device
Implementation Method 2
heat of the reaction material in the reaction cavity can regulate the temperature of the material in the main reaction cavity
Implementation Method 3
the main reaction housing is internally provided with a stirring device... for mixing through the material inlet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A continuous reactor, comprising a main reaction casing (1) and at least one auxiliary reaction casing (2). A stirring device (14) and a first temperature regulating device are arranged in the main reaction casing (1), and material inlets (3) are provided at the upper end thereof; the auxiliary reaction casing (2) is sleevingly arranged at the outer side of the main reaction casing (1), and a reaction cavity is preserved therebetween; an overflow hole (7) communicating with the reaction cavity is formed on the upper part side wall of the main reaction casing (1); the lower ends of the main reaction casing (1) and the auxiliary reaction casing (2) are provided with pollution discharging openings (11) which are in communication with the outside of the auxiliary reaction casing (2); and the lower end of the auxiliary reaction casing (2) is provided with a discharge opening (12).