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A melting crystallization tower and crystallization method

A crystallization tower and crystallization technology, applied in the field of crystallization towers, can solve problems such as the influence of the separation effect of the crystallization tower, and achieve the effects of efficient treatment, accelerated interface renewal, and increased countercurrent washing effect.

Active Publication Date: 2018-01-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In the existing tower-type structure crystallizer, among the three factors of crystallization sweating, recrystallization, and countercurrent washing, the three factors cannot be well taken into account. If one or two of them are emphasized, the separation effect of the crystallization tower is often greatly affected. big impact

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  • A melting crystallization tower and crystallization method
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Embodiment Construction

[0016] combine figure 1 and figure 2 Preferred embodiments of the present invention are described.

[0017] The height of the crystallization tower that present embodiment adopts is 1350mm, and inner diameter is 50mm. There are 4 sieve plates in the tower, and the distance between the sieve plates is 250mm. Among them, there are four small propellers and a large propeller in the middle between every two layers of sieve plates. The blades of the large propeller are 60° fan-shaped and have 3 blades.

[0018] The isolated substances are p-o, p-nitrochlorobenzene. The feed concentration is 90.85%, the set reflux ratio is 2.5, and the stirring rate is 10 rpm. The purity of the outlet material is increased from 90.85% to 99.99% at a crystal bed height of less than 1m.

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Abstract

Aiming at the problem that the three factors of sweating, recrystallization and countercurrent washing cannot be well taken into account in the melt crystallization, the present invention provides a sieve plate crystallization tower and a crystallization method using the tower, through the cycle of "breaking crystals - recrystallization" The process improves the purity of the product. In order to further improve the efficiency, the present invention also provides a propeller sieve plate crystallization tower and a crystallization method using the tower, the propeller is used to further squeeze and crush the crystal, the axial mass and heat transfer in the tower is sufficient, the processing capacity is large, and the purification efficiency is high. high.

Description

technical field [0001] The invention relates to a crystallization tower, in particular to a sieve plate crystallization tower. The invention also relates to a melt crystallization method. Background technique [0002] The world-wide energy shortage and society's requirements for environmentally friendly production technologies are getting higher and higher. According to the forecast of relevant departments, from 2005 to 2020, my country needs to invest 18 trillion yuan in energy-saving and other clean technology fields. As a new high-efficiency and low-consumption separation method, industrial crystallization has great potential. [0003] Traditional industrial crystallization is divided into two categories: solution crystallization and melt crystallization. Among them, melt crystallization is attracting more and more attention, because melt crystallization has many advantages as a method of separating and purifying organic matter with high efficiency and low energy consum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/00
Inventor 易争明
Owner XIANGTAN UNIV
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