Hydraulic Wash Column Nozzle Heating to Prevent Freezing
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Solution Overview
Problem
Existing purification techniques for compounds, such as (meth)acrylic acid, face challenges in achieving safe and stable operation due to freezing and clogging of nozzles in hydraulic wash columns, which can lead to inaccurate instrument readings and compromised safety mechanisms.
Innovation Solution
A method involving the use of a hydraulic wash column where a mother liquor is discharged through a filter, and a liquid at a temperature equal to or higher than the discharged mother liquor temperature is introduced into nozzles attached to the column, excluding the return port for the melt and slurry feed pipe, to prevent freezing and clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wash columns are used for purification, then the purification process can be implemented, but freezing and clogging of nozzles occurs leading to unsafe and unstable operation
Solution Approach 1:
The patent applies preliminary action by heating the liquid to be introduced into nozzles before introduction, and by providing heating means in advance within the wash column structure. This prevents freezing before it occurs by maintaining the liquid temperature above freezing point throughout the system, including in nozzles and piping.
Solution Approach 2:
The patent uses heated liquid as an intermediary substance to prevent freezing in nozzles. The liquid serving as the purification medium is heated to act as a thermal carrier, transferring heat to nozzle surfaces and preventing ice formation that would cause clogging.
2Reliability
If nozzles are heated to prevent freezing, then safe operation is improved, but the device complexity increases
Solution Approach 1:
The patent merges the heating function with the existing wash column structure by integrating heating means into the column body and combining the temperature control system with the existing liquid circulation and purification system. This reduces overall system complexity compared to adding separate heating equipment.
Solution Approach 2:
The heated liquid serves multiple functions: it acts as the purification medium for removing impurities, serves as a heating carrier to prevent nozzle freezing, and maintains stable operating conditions. This multi-functionality reduces the need for separate dedicated heating systems.
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 ensures stable and safe operation by preventing nozzle stagnation and freezing, allowing for accurate instrument readings and effective safety device function, thereby producing high-quality compounds.
Implementation Method 1
a liquid having a temperature equal to or higher than the temperature of the mother liquor immediately after being discharged... is introduced into a nozzle... to prevent freezing
Implementation Method 2
a liquid having a temperature equal to or higher than the temperature of the mother liquor immediately after being discharged is passed through a nozzle... so that freezing can be prevented
Data Source
AI summary
Provided is a method for obtaining high-quality products safely and stably. The present invention relates to a method for producing a compound, the method including feeding a slurry containing crystals of the compound to a hydraulic wash column; melting crystals in a crystal-containing circulation slurry discharged from the hydraulic wash column; discharging a mother liquor using a filter from the crystal-containing slurry in the hydraulic wash column; and introducing a liquid having a temperature equal to or higher than the temperature of the mother liquor immediately after being discharged in the mother liquor discharging step into a nozzle attached to the hydraulic wash column from outside the hydraulic wash column, the nozzle being other than a nozzle at a return port for a circulation liquid containing a melt obtained in the melting and a pipe that feeds the crystal-containing slurry to the hydraulic wash column.