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Suspended downcomer for a liquid-liquid extraction tower

A downcomer, hanging technology, applied in liquid solution solvent extraction, inorganic chemistry, non-metallic elements, etc., can solve the problems of reduced tray efficiency, unsatisfactory production, and lack of operational flexibility in liquid-liquid extraction towers, and achieves improved efficiency. The effect of efficiency

Active Publication Date: 2015-12-16
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the actual application of the liquid-liquid extraction tower, due to changes in operating conditions, such as changes in production load, two physical parameters and process parameters, the tray efficiency often appears to be significantly reduced, and even does not meet the needs of production.
In other words, the liquid-liquid extraction tower has no operational flexibility and cannot adapt to large changes in operating conditions.
When the operating conditions change greatly, the sieve tray or downcomer of the extraction tower must be modified

Method used

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  • Suspended downcomer for a liquid-liquid extraction tower
  • Suspended downcomer for a liquid-liquid extraction tower
  • Suspended downcomer for a liquid-liquid extraction tower

Examples

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Effect test

Embodiment 1～4

[0025] The sieve plate extraction tower adopting the downcomer shown in Figure 4~Figure 5 is applied to the extraction process in the hydrogen peroxide process produced by the anthraquinone method, when the operating conditions (working fluid flow, deionized water flow, extractant flow, When the concentration of hydrogen peroxide in the working solution and the concentration of hydrogen peroxide in the extract) change greatly, the operating condition data is shown in Table 1, and the results of the examples are shown in Table 2.

[0026] Table 1 Operating condition data

[0027]

[0028] Table 2 embodiment result

[0029]

[0030] The data in Table 2 shows that: the sieve plate extraction tower designed with the downcomer structure as shown in Figure 4 to Figure 5 is applied to the extraction process in the production of hydrogen peroxide by the anthraquinone method, when the working fluid flow, deionized water flow , extraction liquid flow rate, working liquid hydrogen...

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Abstract

The invention discloses a hanging downcomer for a liquid-liquid extractor. The hanging downcomer comprises a downcomer main body, a rotatable tubular baffle plate and a guide plate, wherein the guide plate is fixed at the lower end of the downcomer main body, the rotatable tubular baffle plate is sleeved outside the downcomer main body and is arranged on a plane of the guide plate in a movable manner, holes are respectively formed in the lower part of the downcomer main body and the equal-altitude circumference of the rotatable tubular baffle plate, and when the rotatable tubular baffle plate rotates, the circulating area of the hole in the lower part of the downcomer main body is correspondingly increased or reduced. According to the hanging downcomer, improvement of the operating flexibility of an extracting tower is facilitated, and after an operating condition changes, a tower plate or the downcomer of the extracting tower is not required to be reconstructed, the circulating area is regulated so that the normal production requirement can be met, and thus the capital investment for reconstruction of internals of equipment can be saved, and the economic loss in a parking and reconstructing period is reduced.

Description

technical field [0001] The invention relates to a liquid-liquid extraction tower, in particular to the design of a liquid-liquid extraction tower downcomer. Background technique [0002] Liquid-liquid extraction is one of the unit operations commonly used to separate homogeneous liquid mixtures in petrochemical, chemical and pharmaceutical industries. The separation of the mixture is achieved by utilizing the solubility difference of each component in a certain solvent in the liquid mixture. The sieve plate column is a commonly used liquid One of the liquid extraction equipment. In general liquid-liquid extraction, the mutually incompatible two-phase flows in opposite directions (countercurrent operation), one of which is used as a dispersed phase, dispersed into liquid droplets through a sieve to flow upward (or downward), and the other phase is used as a continuous phase, passing through The downcomer flows downward (or upward). [0003] In the liquid-liquid extraction t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04C01B15/013
Inventor 寇志豪赵蕾赵公亮李中赵晓东秦加美张永泽
Owner LIMING RES INST OF CHEM IND
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