A reflux evaporative crystallization device and a method for evaporative crystallization of a mixed solvent

A technology of evaporative crystallization and solvent, which is applied in the field of reflux evaporative crystallization device and mixed solvent evaporative crystallization, which can solve the problems of single structure and achieve the effects of low experimental cost, stable composition and reasonable device design

Inactive Publication Date: 2017-05-03
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the single structure of the evaporation crystallization device in the prior art, and the composition ratio of the mixed solvent in the crystallization process is constantly changing with the crystallization process, and to provide a device with reasonable design, simple structure, convenient use and A reflux evaporative crystallization device capable of maintaining the solvent component ratio basically unchanged during the evaporative crystallization process

Method used

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  • A reflux evaporative crystallization device and a method for evaporative crystallization of a mixed solvent

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Experimental program
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Effect test

Embodiment 1

[0022] Depend on figure 1 It can be seen that the reflux evaporation and crystallization device of the present embodiment is composed of a crystallization tank 1, an evaporation reflux tank 5, a sealed top cover 2, a first reflux condensation pipe 3, a U-shaped pipe 4, a second reflux condensation pipe 6, a reflux pipe 9, The third reflux condensing pipe 7, the atmospheric connecting pipe 8 and the preheater 10 are connected to form.

[0023] Among them, the crystallization tank 1 adopts a commonly used jacket structure, which is a jacket that can be filled with a heat medium outside the inner tank, and a high-pressure and high-temperature sealing device made of stainless steel is installed on the top of the crystallization tank 1. There is a sealed top cover 2 of stainless steel heat preservation type, a steam outlet is opened on the top cover, a thermal insulation evaporation liquid output pipe is installed on the steam outlet, and a heat medium inlet and outlet are opened o...

Embodiment 2

[0033]In this embodiment, the crystallization tank 1 adopts a commonly used jacket structure, and a stainless steel heat-preservation type sealed top cover 2 is arranged on the top of the crystallization tank 1, and a steam outlet is provided on the top cover, and a thermal insulation is installed on the steam outlet. The evaporating liquid output pipe, the outlet end of the evaporating liquid output pipe is connected with the steam inlet end of the first reflux condensing pipe 3 with threaded fasteners, in order to ensure the smooth flow of condensate, the first reflux condensing pipe 3 is installed obliquely and connected The water pipeline is connected, and the inclination angle of the first reflux condenser pipe 3 in this embodiment is 30°.

[0034] The evaporation reflux tank 5 of this embodiment is also a jacketed structure, and a U-shaped pipe 4 is fixed with a bracket inside the evaporation reflux tank 5, and one port of the U-shaped pipe 4 is provided with a funnel sha...

Embodiment 3

[0038] In this embodiment, the crystallization tank 1 adopts a commonly used jacket structure, and a stainless steel heat-preservation type sealed top cover 2 is arranged on the top of the crystallization tank 1, and a steam outlet is provided on the top cover, and a thermal insulation is installed on the steam outlet. The evaporating liquid output pipe, the outlet end of the evaporating liquid output pipe is connected with the steam inlet end of the first reflux condensing pipe 3 with threaded fasteners, in order to ensure the smooth flow of condensate, the first reflux condensing pipe 3 is installed obliquely and connected The water pipeline is connected, and the inclination angle of the first reflux condenser pipe 3 in this embodiment is 50°.

[0039] The evaporation reflux tank 5 of this embodiment is also a jacketed structure, and a U-shaped pipe 4 is fixed with a bracket inside the evaporation reflux tank 5, and one port of the U-shaped pipe 4 is provided with a funnel sh...

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Abstract

The invention relates to a reflux evaporation crystallization device and a method for evaporative crystallization of a mixed solvent. The device comprises a crystallization tank and an evaporation reflux tank. There is a detection port at the bottom of the tank, and a U-shaped tube is fixed in the evaporating reflux tank. One port of the U-shaped tube is processed into a funnel shape and is directly opposite to the outlet of the reflux inlet pipe, and the other end is processed into a convergent type and the port is lower than the Funnel-shaped port, the evaporating reflux tank communicates with the reflux pipe through the second reflux condensing pipe, and the reflux pipe communicates with the crystallization liquid inlet of the crystallization tank through the preheater; the invention can adjust the temperature of the evaporating reflux tank to realize the control of the reflux rate, effectively The reduction of the proportion of the volatile components of the solvent in the crystallization tank is compensated, so that the proportion of the mixed solvent components in the crystallization tank remains unchanged, and it is convenient to use, high in work efficiency and less in waste of raw materials.

Description

technical field [0001] The invention belongs to the technical field of crystallization experimental device research, and in particular relates to a reflux evaporation crystallization device and a mixed solvent evaporation crystallization method. Background technique [0002] Most of the solution evaporation crystallization is under normal and reduced pressure conditions, the crystallization solution is kept at a certain temperature, and the solvent is continuously removed through evaporation and condensation to increase the concentration of the solution and realize the constant temperature crystallization process. Compared with cooling crystallization, evaporative crystallization does not need to cross a certain temperature range, and crystallization products can be obtained at a single temperature, effectively avoiding the influence of temperature changes on crystallization products [0003] The current evaporative crystallizer has a relatively simple structure, which can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02B01D1/26B01D1/30
CPCB01D1/26B01D1/30B01D9/0018B01D9/0031B01D2009/0086
Inventor 于秋硕李晓锐张田张香乔小艳齐敏马晓迅
Owner NORTHWEST UNIV
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