Thermal Separation Column Spray Device for Polymer Prevention
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Solution Overview
Problem
In thermal separation processes, particularly in columns handling (meth)acrylic monomers, unwanted polymerization occurs in dead zones within the column, leading to inefficiencies and safety risks due to the formation of polymer that can close passage openings and potentially cause explosions.
Innovation Solution
A column design featuring a spray device that sprays liquid against the inner surface of the nozzle and inspection opening to prevent liquid from lingering, combined with an inclined nozzle surface to ensure liquid runoff, reducing polymer formation and maintaining efficient separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a column is used for thermal separation of (meth)acrylic monomers, then separation efficiency is improved, but polymerization in dead zones occurs leading to safety risks and column blockage
Solution Approach 1:
The patent applies preliminary anti-action by introducing a spray device that continuously sprays liquid onto the inner surface of the column cavity, particularly in dead zones, before polymerization can occur. This preliminary action prevents polymer buildup by maintaining liquid flow and preventing monomer accumulation in stagnant areas, thereby eliminating the safety risk while preserving separation efficiency
Solution Approach 2:
The spray device acts as an intermediary element between the liquid stream and the column wall in dead zones. By introducing this intermediary mechanism, liquid is actively redirected onto surfaces where it would otherwise stagnate, preventing polymerization without interfering with the main thermal separation process between ascending gas and descending liquid
2Ease of repair
If inspection openings are provided in the column, then maintenance access is improved, but dead zones are created promoting polymer formation
Solution Approach 1:
The spray device targets the inspection opening area and surrounding dead zones with continuous liquid spray, preventing polymer formation before it can occur. This preliminary protective action ensures that even though dead zones exist for maintenance access, they do not become sites of polymer buildup
Solution Approach 2:
The patent converts the potentially harmful dead zones created by inspection openings into beneficial areas by using the spray device to intentionally introduce liquid flow into these stagnant regions. The harmful stagnation is transformed into a controlled liquid delivery mechanism that prevents polymerization while the inspection opening remains accessible for maintenance
3Reliability
If liquid sprays against the nozzle surface, then polymerization prevention is improved, but device complexity increases
Solution Approach 1:
The spray device is designed to serve multiple functions: it prevents polymerization in dead zones, maintains liquid flow patterns, and can be integrated with existing column structures. By making the spray system multi-functional, the patent justifies the added complexity through multiple benefits rather than a single function
Solution Approach 2:
The spray device uses liquid from the column's own circulation system to spray against surfaces, meaning the column essentially sprays itself. This self-service approach minimizes external complexity as the system uses its own resources (the liquid being separated) to prevent polymerization without requiring entirely separate external 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
The solution effectively prevents polymerization in dead zones, maintaining column efficiency and safety by ensuring continuous liquid flow and preventing polymer buildup, thus enhancing the separation process and reducing the risk of explosions.
Implementation Method 1
a spray device is arranged in the column body, with which liquid at least against the surface of the nozzle directed into the column cavity can be sprayed
Implementation Method 2
an inclined nozzle surface to ensure liquid runoff
Data Source
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AI summary
The invention relates to a column (1) for thermally treating fluid mixtures, comprising a cylindrical, vertically-aligned column body (2) that forms a column cavity (3), a plurality of trays (8) which are mounted in the column cavity (3) and vertically spaced apart from one another, at least one neck (11) arranged in the column body (2) and extending away from said column body (2), and a closeable inspection opening (9) formed at the neck (11). The claimed column is characterised in that a spray device (20) is arranged in the column body (2) and can spray liquid (22) at least against the neck (11) surface (15) directed into the column cavity (3).