Dual-Circulation Ethoxylation Reactor with Pre-Reaction Cavity
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Solution Overview
Problem
Existing devices for producing ethoxylation derivatives face challenges in achieving high yield and growth rate, as they require either long reaction times with low output or high costs with short reaction times, due to the limitations of chain initial dose quantities and ethylene oxide flow rates.
Innovation Solution
The device incorporates a main and assistant circulation loop with a pre-reaction cavity and a dual-pump system, allowing for a lower starting quantity and efficient transition from low to high ethylene oxide flow rates, enabling shorter reaction times and higher yields by coordinating the main and assistant circulation loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the adding flow rate of ethylene oxide is enhanced to achieve high output and short reaction time, then productivity is improved, but the cost of chain initial dose increases and device complexity increases
Solution Approach 1:
The circulation system is segmented into two independent loops: a main circulation loop with a main circulation pump and an assistant circulation loop with an assistant circulation pump. Each loop has its own heat exchanger and can operate independently or in coordination. This segmentation allows the system to achieve high productivity through the main loop while the assistant loop provides flexible support with lower initial dose requirements, thereby resolving the contradiction between high output and reduced device complexity/cost.
2Duration of action of moving object
If the adding flow rate of ethylene oxide is enhanced to achieve short reaction time, then duration of action is reduced, but the cost of chain initial dose increases
Solution Approach 1:
The system dynamically adjusts the operation mode between assistant circulation mode and main circulation mode based on real-time reaction conditions. The assistant circulation pump operates first with lower flow rate and initial dose requirement, then transitions to main circulation pump for high-speed reaction. This dynamic adjustment allows the system to achieve short reaction times while optimizing the quantity of chain initial dose required, resolving the contradiction between reaction time and initial dose cost.
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 configuration enables high yield and growth rate production while minimizing costs by optimizing the reaction time and output through coordinated operation of the main and assistant circulation loops.
Implementation Method 1
A main circulation pump; the main circulation feed outlet is communicated with the first feed inlet of the main circulation heat exchanger through the main circulation pump
Implementation Method 2
A main circulation heat exchanger, comprising a first feed inlet and a first feed outlet; the first feed outlet of the main circulation heat exchanger is communicated with the main circulation feed inlet of the reactor
Implementation Method 3
An assistant circulation pump with lower starting quantity than the said main circulation pump; the assistant circulation feed outlet of the reactor is communicated with the second feed inlet of the assistant circulation heat exchanger through the assistant circulation pump
Implementation Method 4
An assistant circulation heat exchanger, comprising a second feed inlet and a second feed outlet; the second feed outlet of the assistant circulation heat exchanger is communicated with the assistant circulation feed inlet of the reactor
Implementation Method 5
a stirring device arranged in the reactor
Implementation Method 6
a vacuumizing pipe, an evacuation pipe
Data Source
AI summary
A device for producing ethoxylation derivatives includes an assistant circulation loop with lower starting quantity is added on the base of the main circulation loop, and the assistant circulation pump is started first when slight chain initial dose is added with low flow rate of the ethylene oxide and high growth rate of polyreation; when the amount of reactant gets to the starting quantity of the main circulation pump, the main circulation loop is started with high flow rate of ethylene oxide. The two circulation loops cooperate with each other shorten reaction time and high yield in one batch; a pre-reaction cavity with smaller inner diameter than that of the main body of the reactor is extended from the bottom of the main body of the device, so that lower chain initial dose can start the assistant circulation pump, and then start the assistant circulation loop.