Process for producing (METH)acrylic acid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The operation of refrigerators used in the crystallization and melting steps for producing (meth)acrylic acid is destabilized due to changes in cooling and heating loads caused by variations in temperature of the cooling and heating media, leading to inefficiencies and potential instability in the production process.
Innovation Solution
The implementation of buffer tanks to stabilize the temperature of the cooling and heating media, reducing temperature changes and maintaining consistent operation conditions, thereby stabilizing the refrigerator's operation and maintaining consistent cooling and heating loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the temperature of cooling/heating medium is adjusted by a refrigerator to maintain constant temperature, then the temperature stability is improved, but the cooling/heating load changes due to temperature variation of returned medium, causing refrigerator operation instability
Solution Approach 1:
The buffer tank stores cooling/heating medium in advance, creating a temperature buffer that anticipates and absorbs load variations before they reach the refrigerator, allowing the refrigerator to operate with a more stable and predictable load
Solution Approach 2:
The buffer tank acts as an intermediary between the crystallizer and the refrigerator, decoupling the temperature variations in the crystallizer from the refrigerator's operation, thereby protecting the refrigerator from destabilizing load changes
2Reliability
If buffer tank is introduced to stabilize temperature, then refrigerator operation stability is improved, but device complexity increases
Solution Approach 1:
The buffer tank is a simple, inexpensive vessel that provides substantial stabilization functionality without requiring complex control systems or expensive components, achieving reliability improvement with minimal complexity addition
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 approach allows for stable operation of the refrigerator regardless of load changes in the crystallizing and melting steps, ensuring consistent quality and yield of purified (meth)acrylic acid by maintaining constant temperatures and adjusting media temperatures as needed.
Implementation Method 1
a crystallizing step of supplying a cooling medium from a refrigerator to a crystallizer, thereby cooling a (meth)acrylic acid-containing solution, and obtaining a (meth)acrylic acid crystal
Implementation Method 2
a melting step of supplying a heating medium from the refrigerator to the crystallizer, thereby heating the (meth)acrylic acid crystal, and obtaining purified (meth)acrylic acid
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A process for producing (meth)acrylic acid, comprising a crystallizing step of supplying a cooling medium from a refrigerator to a crystallizer and returning the cooling medium from the crystallizer to the refrigerator, thereby obtaining a (meth)acrylic acid crystal from a (meth)acrylic acid-containing solution; and a melting step of supplying a heating medium from a refrigerator to the crystallizer and returning the heating medium from the crystallizer to the refrigerator, thereby melting the (meth)acrylic acid crystal; wherein the crystallizing step and the melting step are respectively performed at least once, thereby producing purified (meth)acrylic acid from a crude (meth)acrylic acid solution; temperature of the cooling medium discharged from the refrigerator is maintained constant at temperature T1; temperature of the cooling medium to be returned to the refrigerator is maintained constant at temperature T2; the temperature T2 is adjusted depending on a production amount of the purified (meth)acrylic acid per unit time.