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KR-102964145-B1 - Device for radial separation in a simulated moving layer

KR102964145B1KR 102964145 B1KR102964145 B1KR 102964145B1KR-102964145-B1

Abstract

The present invention relates to an apparatus, column and method for radial separation or reaction, wherein the adsorption chamber (9) has a filling height (H3) greater than the height of the distribution duct (6) and the height of the collection duct (8), and the upper wall (2) of the adsorption chamber (9) includes at least one inlet (16) for a washing solvent.

Inventors

  • 봉네 알렉상드르
  • 레네뀌젤-르-꼬끄 다미앵
  • 블랑끄 기욤
  • 오기에 프레데릭
  • 로용-르보 오드
  • 푸라띠 마넬
  • 아흐마디-모틀라그 아미르 호세인

Assignees

  • 아이에프피 에너지스 누벨

Dates

Publication Date
20260513
Application Date
20210720
Priority Date
20200727

Claims (12)

  1. - side wall (1), - Upper wall (2), - lower wall (3), - At least one inlet (5) for the fluid to be separated, - At least one vertical distribution duct (6), - at least one fluid outlet (7), - At least one vertical collection duct (8), - An adsorption chamber (9) designed to contain a solid adsorbent layer (10), wherein the adsorption chamber (9) is located between the distribution duct (6) and the collection duct (8) and extends from the upper wall (2) to the lower wall (3), - At least one distribution grid (11) located between the distribution duct (6) and the adsorption chamber (9), and - At least one collection grid (12) located between the collection duct (8) and the adsorption chamber (9) A method for separating a simulated moving layer using a cylindrical container including, - The adsorption chamber (9) has a filling height (H3) greater than the height of the distribution duct (6) and the height of the collection duct (8), - The upper wall (2) includes at least one inlet (16) for a washing solvent, and In the above method: - Fluid is introduced into the distribution duct (6), and the fluid is distributed in the adsorption chamber (9) and collected in the collection duct (8). - A method in which a washing solvent is introduced into the adsorption chamber (9), and the washing solvent is collected together with the fluid in the collection duct (8).
  2. In Article 1, The above charging height (H3) is at least 1% greater than the height of the distribution duct (6) and the height of the collection duct (8).
  3. In Article 2, The above charging height (H3) is 1 to 10% greater than the height of the distribution duct (6) and the height of the collection duct (8).
  4. In Paragraph 3, The above charging height (H3) is 1.5 to 7% greater than the height of the distribution duct (6) and the height of the collection duct (8).
  5. In Article 1, A method comprising at least one inlet (16) for washing solvent, comprising a plurality of washing solvent orifices (16) distributed over an adsorbent solid and/or a perforated plate and/or a distributor plate.
  6. In Article 1, A method further comprising a central wall (4) parallel to the above side wall (1).
  7. In Article 1, The above distribution duct (6) and the above collection duct (8) are suitable for fluid downward flow or fluid upward flow.
  8. In Article 1, A method in which the distribution duct (6) is in the center and the collection duct (8) is in the periphery, or the distribution duct (6) is in the periphery and the collection duct (8) is in the center.
  9. In Article 1, A method in which the bottom limit of the adsorption chamber (9) corresponds to the bottom limit of the distribution duct (6) and the collection duct (8).
  10. In any one of paragraphs 1 through 9, A method in which a washing solvent flow rate is provided at the washing solvent inlet (16) such that the ratio of the washing solvent flow rate to the fluid flow rate is 0.001 to 0.15.
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Description

Device for radial separation in a simulated moving layer The present invention relates to a radial apparatus for separating or reacting fluids in a separation method, such as a simulated moving bed separation method, or a reaction method, such as a catalytic modification method, for example, particularly for xylene. Current technology for separation by a simulated moving layer (often abbreviated as SMB for the rest of the text) uses a specific number of units having the following common features: - A series of separation devices (also known as adsorbers) each comprising an adsorption chamber located between a distribution duct and a collection duct (said that the adsorption chamber includes a layer of adsorbent through which fluid flows), - In particular, an injection system for injecting feedstocks and desorbents, and in particular, a withdrawal system for withdrawing produced effluents referred to as extracts and raffinates, - Collection and redistribution systems for transfer from one layer to the next (referred to as inter-bed zones). However, when the inventors investigated the SMB separation technique in the radial adsorbent layer, they discovered that the solid adsorbent becomes compacted in the adsorbent layer over time, creating a flow space without the solid adsorbent, which results in a decrease in the efficiency and purity of the separated product. Current technology for radial reaction devices, such as radial reactors for catalytic reforming, uses a fluid-tight textile placed inside an adsorption chamber and stuck to the surface of the layer by elevated pressure to conform to the surface of the solid. Therefore, the creation of fluid spaces without solid adsorbent inside the adsorption chamber is avoided as the solid is compacted, which occurs over time. In contrast, plugging with the oil-tight fabric in part of the adsorption chamber between the distribution duct and the collection duct can create a chamber where fluid is stagnant (referred to as a "dead" volume, which is detrimental to the performance of the separation method) and also cause disruption to the fluid distribution and collection systems. Therefore, the use of oil-tight fabric is difficult to apply to the radial use of SMB separation devices, and such hydrodynamic disruption causes the stream to become unbalanced and is also detrimental to the performance of the method. In a first embodiment, the present invention, - Side wall, - Upper wall, - lower wall, - At least one inlet for the fluid to be separated, - At least one vertical distribution duct, - At least one fluid outlet, - At least one vertical collection duct, - An adsorption chamber designed to contain a layer of (solid) adsorbent, wherein the adsorption chamber is located between a distribution duct and a collection duct and extends from an upper wall to a lower wall, said adsorption chamber - At least one distribution grid located between the distribution duct and the adsorption chamber, and - At least one collection grid located between the collection duct and the adsorption chamber An apparatus for radial separation (e.g., in a simulated moving bed) or reaction (e.g., catalytic reforming) having a cylindrical vessel comprising, - The adsorption chamber has a filling height greater than the height of the distribution duct and the height of the collection duct, - The upper wall relates to a device comprising at least one inlet for a washing solvent. Advantageously, the device according to the present invention enables the distribution and collection surface area to be maintained constant over time, particularly at the top of the adsorption chamber, despite the phenomenon of the adsorbent layer being compacted over time. Accordingly, the device according to the present invention also enables the system to maintain a high level of separation performance. According to one or more embodiments, the filling height is at least 1% greater than the height of the distribution duct and the height of the collection duct. According to one or more embodiments, the filling height is 1 to 10% greater than the height of the distribution duct and the height of the collection duct. According to one or more embodiments, the filling height is 1.5 to 7% greater than the height of the distribution duct and the height of the collection duct. According to one or more embodiments, the at least one inlet for the cleaning solvent is designed to provide a cleaning solvent flow rate such that the ratio of the flow rate of the cleaning solvent to the flow rate of the fluid is 0.001 to 0.15. According to one or more embodiments, the at least one inlet for the washing solvent comprises a plurality of washing solvent orifices distributed over the cross-section of an additional adsorbent solid and/or perforated plate and/or distributor plate. According to one or more embodiments, the device further includes a central wall parallel to the side wall. According to one or more embodiments, the distribution d