Method for producing (METH)acrylic acid and crystallization system
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Solution Overview
Problem
The temperature fluctuations of cooling and heating media in crystallization processes for producing (meth)acrylic acid destabilize heat source devices and increase energy consumption, as the temperature of the media changes during crystallization and melting operations.
Innovation Solution
A process that maintains constant temperatures of cooling and heating media by using buffer tanks with temperature gradients, allowing for efficient adjustment and utilization of media, thereby stabilizing the operation of heat source devices and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooling medium temperature is adjusted by a heat source device during crystallization, then crystallization can be performed, but the temperature of the cooling medium changes during the process causing destabilization of the heat source device operation and increased energy consumption
Solution Approach 1:
The patent introduces a buffer tank that stores cooling medium in advance before it is supplied to the crystallizer. This preliminary storage allows the heat source device to maintain stable operation by drawing from a reservoir rather than directly handling the varying temperature loads from the crystallization process, thereby preventing destabilization and reducing energy consumption.
Solution Approach 2:
The buffer tank acts as an intermediary between the heat source device and the crystallizer. It mediates the temperature fluctuations by absorbing excess heat when the cooling medium returns at high temperature and releasing it when needed, thus stabilizing the heat source device operation and reducing energy consumption.
2Reliability
If cooling medium temperature is not adjusted, then heat source device operation remains stable, but crystallization cannot proceed effectively
Solution Approach 1:
The buffer tank is pre-filled with cooling medium at the appropriate temperature before crystallization begins. This preliminary preparation ensures that when crystallization starts, the cooling medium can be supplied at the required temperature without causing instability to the heat source device, thus maintaining both stability and productivity.
Solution Approach 2:
The buffer tank serves as a mediator that decouples the crystallization process from the heat source device. It allows the crystallizer to receive cooling medium at the optimal temperature for effective crystallization while the heat source device operates stably by interacting with the buffer tank rather than directly with the crystallization process.
3Productivity
If the temperature of cooling medium discharged from crystallizer is high at the beginning and drops during crystallization, then crystallization progresses, but the cooling load of the heat source device changes causing operational destabilization
Solution Approach 1:
The patent changes the operational parameters of the heat source device by introducing a buffer tank that maintains a relatively constant temperature of the cooling medium supplied to the crystallizer. This parameter stabilization allows the crystallization to progress while preventing large fluctuations in the cooling load on the heat source device, thereby maintaining operational stability.
Solution Approach 2:
The buffer tank acts as a thermal buffer that absorbs the temperature variations occurring during crystallization. When the cooling medium returns from the crystallizer with varying temperatures, the buffer tank smooths these fluctuations, maintaining a stable cooling load on the heat source device while still allowing crystallization to progress effectively.
4Productivity
If heating medium temperature is adjusted during melting, then melting can be performed, but the temperature of the heating medium changes causing increased energy consumption
Solution Approach 1:
The buffer tank stores heating medium at the appropriate temperature before it is supplied to the crystallizer for melting operations. This preliminary preparation allows the melting process to proceed efficiently while the heat source device maintains stable operation, avoiding the energy consumption increases that would result from continuous temperature adjustments.
Solution Approach 2:
The buffer tank serves as a thermal intermediary during melting operations. It absorbs and releases thermal energy to maintain a relatively constant temperature of the heating medium supplied to the crystallizer, enabling efficient melting while preventing excessive energy consumption by the heat source device.
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 stabilizes the crystallization and melting operations, reduces energy consumption, and allows for more efficient production of (meth)acrylic acid by maintaining consistent cooling and heating loads on the heat source devices.
Implementation Method 1
supplying a cooling medium to a crystallizer from a heat source device, thereby crystallizing (meth)acrylic acid from a crude (meth)acrylic acid solution
Implementation Method 2
supplying a heating medium to a crystallizer from a heat source device, thereby melting crystallized (meth)acrylic acid
Implementation Method 3
a first buffer tank provided with an upper opening connected to the outlet of the medium-present part and the cooling medium-return port, and a lower opening connected to the cooling medium-supply port
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A process for producing (meth)acrylic acid comprising the steps of: supplying a cooling medium to a crystallizer (1) from a heat source device (4A), thereby crystallizing (meth)acrylic acid from a crude (meth)acrylic acid solution; discharging the cooling medium from the crystallizer (1) and returning the cooling medium to the heat source device (4A); supplying a heating medium to the crystallizer (1) from a heat source device (4B), thereby melting the (meth)acrylic acid; and discharging the heating medium from the crystallizer (1) and returning the heating medium to the heat source device (4B); wherein temperature of the cooling medium returned to the heat source device (4A) is maintained constant by utilizing a first buffer tank (5); and temperature of the heating medium returned to the heat source device (4B) is maintained constant by utilizing a second buffer tank (6).