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Backflow type evaporation and crystallization device and method for evaporating and crystallizing mixed solvent

An evaporative crystallization and solvent technology, which is applied in the field of reflux evaporative crystallization devices and mixed solvent evaporative crystallization, can solve problems such as single structure, and achieve the effects of low experimental cost, less waste of raw materials and simple operation.

Inactive Publication Date: 2016-05-04
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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  • Backflow type evaporation and crystallization device and method for evaporating and crystallizing mixed solvent

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Experimental program
Comparison scheme
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 backflow type evaporation and crystallization device and a method for evaporating and crystallizing a mixed solvent. The device comprises a crystallization slot and an evaporation backflow slot, wherein the crystallization slot is communicated with a backflow liquid leading-in pipe of the evaporation backflow slot through a first backflow condenser pipe; a detection port is formed in the bottom of the evaporation backflow slot; a U-shaped pipe is fixedly arranged in the evaporation backflow slot; one end opening of the U-shaped pipe is in a hopper shape and directly faces to the outlet of the backflow liquid leading-in pipe; the other end of the U-shaped pipe is in a convergent type and has an end opening lower than the hopper shaped end opening; the evaporation backflow slot is communicated with a backflow pipe through a second backflow condenser pipe; the backflow pipe is communicated with the crystallization liquid inlet of the crystallization slot through a preheater. By the backflow type evaporation and crystallization device disclosed by the invention, the temperature of the evaporation backflow slot can be adjusted so as to control the backflow rate; the proportion reduction of easily volatile components of the solvent in the crystallization slot is effectively compensated, so that the component proportion of the mixed solvent in the crystallization slot is not changed; the backflow type evaporation and crystallization device is convenient in use, high in working efficiency and less in raw material waste.

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 Applications(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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