Built-in falling film-type reboiler rectification tower and rectification method thereof

A reboiler and rectification tower technology, which is applied to the built-in falling film reboiler rectification tower and its rectification field, can solve the problems of high investment and operation cost, unstable operation, poor film-forming effect, etc. Equipment investment and operating costs, and the effect of increasing operational stability

Active Publication Date: 2016-01-13
CHANGLING PETRO CHEM ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a traditional rectification tower, the falling film reboiler is arranged outside the tower body, a pump needs to be used for pressurization, the operation is unstable,

Method used

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  • Built-in falling film-type reboiler rectification tower and rectification method thereof
  • Built-in falling film-type reboiler rectification tower and rectification method thereof
  • Built-in falling film-type reboiler rectification tower and rectification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The 2t / h rich amine liquid to be separated enters the rectification tower with built-in falling film reboiler. Due to rectification, the material containing most of the heavy components descends, and is evenly scattered and collected into the upper tube sheet through the last layer of packing. The operating pressure is 0.1MPa (G), and the tower diameter is DN500.

[0073] The liquid layer on the upper tube plate flows into the heat exchange tube from the gap between the cap and the serrated opening, and under the action of the draft tube, a uniform and stable downward flowing film is formed between the outer wall of the draft tube and the inner wall of the heat exchange tube. In the liquid layer, the depth-to-width ratio of the zigzag opening is 1.5, the heat exchange tube is DN32 heat exchange tube with a length of 2.5m, and the diversion tube is DN25 diversion tube.

[0074] The film-like liquid layer is continuously vaporized under the action of the heating medium ou...

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Abstract

The invention provides a built-in falling film-type reboiler rectification tower. The built-in falling film-type reboiler rectification tower comprises a column reactor and a falling film-type reboiler arranged in the column reactor. The falling film-type reboiler comprises an upper tube plate, a lower tube plate, at least one riser structure and at least two heat exchange tube structures. The invention also provides a rectification method of the built-in falling film-type reboiler rectification tower. The falling film-type reboiler is assembled in the column reactor so that an equipment investment is greatly reduced, an operation cost is greatly reduced and operation stability is improved. The upper tube plate collects materials containing a large part of a heavy component and a uniform liquid layer is formed so that liquid surface fluctuation is avoided and heat exchange tube film forming effects are greatly improved.

Description

technical field [0001] The invention relates to chemical equipment, in particular to a rectification tower with a built-in falling film reboiler and a rectification method thereof. Background technique [0002] The working principle of the falling film reboiler is: the feed liquid is evenly distributed to each heat exchange tube through the film-forming distributor of the upper tube box. The heating medium on the outside of the tube is heated and vaporized continuously, and flows out from the tube box under the heat exchange tube in the form of gas-liquid two-phase. The falling film reboiler has a series of advantages such as extremely small pressure drop, high heat transfer coefficient, and low temperature difference required for heat transfer. It is especially suitable for heat-sensitive and high-vacuum working conditions, and is widely used in chemical, pharmaceutical, food and other industries. [0003] In traditional rectification towers, the falling film reboiler is i...

Claims

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Application Information

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IPC IPC(8): B01D3/14B01D3/32
Inventor 杨劲匡晓辉李根忠王萌吴彬
Owner CHANGLING PETRO CHEM ENG DESIGN
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