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Full effective tray with separating phase transformation and small plate distance rectifying tower

A rectification tower and tray technology, which is applied in the innovation field of tray structure, can solve the problems of low tray efficiency, large number of rectification trays, large plate spacing, etc., and achieve high plate efficiency, lower tower height, and better plate spacing small effect

Inactive Publication Date: 2009-10-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to solve the problems such as many plates, low plate efficiency, and large plate spacing in the rectifying tower as mentioned above

Method used

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  • Full effective tray with separating phase transformation and small plate distance rectifying tower
  • Full effective tray with separating phase transformation and small plate distance rectifying tower
  • Full effective tray with separating phase transformation and small plate distance rectifying tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Each tray is a tower section as a whole (the solid line in Figure 3), and the tower section is mainly composed of a vertical column shell 10, a liquid collecting plate 3 and a heat exchange plate 1. The heat exchange plate 1 is a thin plate as thin as possible (about 0.5 mm, heat transfer block), and the plate surface is stamped into a group of "v" shaped grooves that are perpendicular to the overflow weir (a bit like asbestos tiles, but the distance between the grooves is relatively small) Large, there is a flat part on the plate), the groove plays the role of strengthening the load-bearing capacity, guiding the liquid phase flow on the plate, and collecting the condensate under the plate. In order to make the thickness of the liquid layer on the heat exchange plate uniform, the heat exchange plate should be about 5mm lower on the side of the overflow weir (depending on the viscosity of the liquid phase), forming a slope along the flow direction. The liquid collecting ...

Embodiment 2

[0027] The difference between embodiment 2 and embodiment 1 is that a tube water condenser is arranged in the top of the tower above the heat exchange plate of the first tray and replaced by an external dephlegmator.

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Abstract

A balanced fractional distillation full-effect tray and a rectification column with a small plate spacing are innovations for the column, especially the tray, and the purpose is to solve the existing problems of low plate efficiency, large number of plates, and large plate spacing. The present invention abandons the current mass transfer method in which the gas-liquid two-phase cannot reach equilibrium in direct contact, and adopts a liquid multi-component equilibrium separation in which the gas phase is condensed and the liquid phase is distilled in the indirect heat transfer of the gas-liquid two-phase The way. The rectification process of the whole column is very similar to a multi-effect evaporator, and heat is exchanged between condensation and evaporation. The invention has the following advantages: high plate efficiency, less plate number, small plate spacing and low tower height.

Description

Technical field [0001] The invention relates to the innovation of the plate tower in the vapor-liquid mass transfer equipment in the chemical industry, especially the innovation of the plate structure. Background technique [0002] Distillation tower is the most commonly used equipment for liquid multi-component separation in various chemical production processes. Distillation tower is divided into plate tower and packed tower. Plate tower is used more. The core component of plate tower is tray, with bubble cap , float valve, sieve plate and other forms of trays. The existing trays achieve the purpose of mass transfer by making the vapor and liquid phases in close contact. During the contact, the vapor phase is partially liquefied and the liquid phase is partially vaporized. Can not reach mass transfer balance like this, plate efficiency is always less than 1 (Wang Jian, Chemical Dictionary, Chemical Industry Press, the fourth edition in August, 200, p897). [0003] With th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32
Inventor 郭晓峰姚素玲丁一慧
Owner TAIYUAN UNIV OF TECH