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Incremental freeze concentration equipment with double-sandwich structure and freeze concentration method

A freeze-concentration, double-interlayer technology, applied in chemical instruments and methods, solution crystallization, crystallization separation, etc., can solve the problems of increasing solute entrainment, affecting production efficiency, lack of scientific treatment methods in the later thawing stage, etc., to optimize the process. Condition, Effective Concentration Effect

Active Publication Date: 2018-06-19
SHAOGUAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Lack of accurate and stable control of the temperature change rate of the cold carrier in the crystallization tank, which affects the effect of freeze concentration
In order to achieve continuous cooling of the feed liquid, the interlayer of the cold carrier in the crystallization tank is required to continuously provide cooling capacity to the feed liquid in the tank. If there is no precise and stable control of the temperature of the cold carrier, it will often lead to a large local overcooling of the liquid material near the wall in the tank. Dendritic heterogeneous ice crystals are formed, and higher-level branches (i.e., secondary nucleation) are formed on the main branches to wrap the solute molecules, resulting in an increase in the amount of solute entrainment, which seriously affects the concentration effect
[0006] 2) Lack of accurate and stable control of the temperature change rate of the freeze-concentrated feed liquid, resulting in low versatility of the equipment for different types of liquid freeze-concentration
[0007] 3) Lack of scientific treatment methods in the later thawing stage, which affects production efficiency
After the gradual freeze concentration is completed, it will enter the thawing process of entrained ice. The natural thawing of large ice cubes in the heat preservation system is very slow, and even takes several days, which will seriously affect the production efficiency of the equipment.
[0008] 4) Lack of real-time recording function of process parameters in the whole process, which is not conducive to analysis and optimization of freeze concentration process conditions

Method used

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  • Incremental freeze concentration equipment with double-sandwich structure and freeze concentration method
  • Incremental freeze concentration equipment with double-sandwich structure and freeze concentration method
  • Incremental freeze concentration equipment with double-sandwich structure and freeze concentration method

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Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: Progressive freeze-concentration equipment with double sandwich structure

[0053] Please also see Figure 1~3 , figure 1 It is a schematic diagram of the structure of the crystallization concentration unit, figure 2 It is a schematic diagram of the connection of the cold carrier temperature control unit, image 3 It is a schematic diagram of the connection control between the parameter control and the automatic recording unit.

[0054] The progressive freezing and concentrating equipment with a double sandwich structure of the present invention includes a crystallization and concentration unit, a cold carrier temperature control unit, and a parameter control and automatic recording unit.

[0055] Such as figure 1 As shown, the crystallization concentration unit includes a crystallization concentration tank 10 , a heat preservation tank 11 , a cryogenic pump 12 , a pneumatic lifting device 13 , a stirring device 14 , an outer interlayer temperature ...

Embodiment 2

[0074] Embodiment 2: freeze concentration method

[0075] Use the progressive freeze concentration equipment of double sandwich structure of the present invention to carry out the operation method of freeze concentration as follows:

[0076] S1: Measure the freezing point and supercooling point of the feed liquid to be concentrated.

[0077] S2: setting the temperature range of the first stage, cleaning the crystallization concentration tank 10, the specific steps are as follows:

[0078] Start the power supply of the equipment, and use the operating parameter panel 30 to respectively set the ranges of the temperature of the cold carrier tank, the temperature of the temperature balance control box and the temperature of the outer interlayer. Among them, the lower limit of the temperature of the cold carrier tank is the lowest, the upper limit of the temperature of the cold carrier tank, the lower limit of the temperature of the temperature balance control box and the lower ...

Embodiment 3

[0101] Embodiment 3: to the freezing concentration application of fruit vinegar

[0102] The progressive freeze-concentration equipment and the concentration method of the double sandwich structure of the present invention are applied to the freeze-concentration of the clear and transparent food material liquid, specifically to the freeze-concentration of the fruit vinegar stock solution.

[0103] The fruit vinegar stoste to be concentrated is a clear transparent liquid, and its weight is 50.6kg, and initial soluble solid content is 7.7%, and total acid (calculated as acetic acid) is 1.87%, and freezing point is-2.1 ℃, and supercooling point is-3.3 ℃ .

[0104] The specific process operating parameters set in stages of freeze concentration and thawing are shown in Table 1.

[0105] Table 1 Process operating parameters of fruit vinegar freeze-concentration set in stages

[0106]

[0107]

[0108] The first stage of freeze-concentration in Table 1 is the stage in which...

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Abstract

The invention relates to incremental freeze concentration equipment with a double-sandwich structure. The incremental freeze concentration equipment comprises a crystallization and concentration unit,a cold carrier temperature control unit and a parameter control and automatic recording unit, wherein the crystallization and concentration unit comprises a crystallization and concentration tank, anouter sandwich temperature probe and multiple groups of temperature recording probes in the crystallization and concentration tank; the side wall of the crystallization and concentration tank is of the double-sandwich structure which comprises an inner sandwich layer in which a buffering heat carrier I is introduced and an outer sandwich layer in which a cold carrier II is introduced; the heat carrier I is a food-grade carrier having heat transfer and buffer characteristics; the cold carrier II is an anti-free cold carrier; the outer sandwich layer temperature probe is arranged in the outer sandwich layer; the multiple groups of temperature recording probes are arranged in the crystallization and concentration tank. The invention also relates to a freeze concentration method. The incremental freeze concentration equipment disclosed by the invention is capable of realizing stabilization and accurate control of temperature of feed liquid during a freeze concentration process, and has the advantages of having a good freeze concentration effect, strong universality to different feed liquid and high automation degree, being beneficial for optimizing technological conditions, and the like.

Description

technical field [0001] The invention belongs to the technical field of low-temperature processing, and in particular relates to a progressive freeze-concentration device with a double sandwich structure and a concentration method. Background technique [0002] Freeze concentration is a liquid material concentration technique commonly used in industries such as food, nutraceuticals and biopharmaceuticals that operates at subfreezing temperatures. Compared with evaporation and concentration technology, it has great advantages in effectively recovering heat-sensitive natural aromatic flavor substances, proteins, enzymes, polysaccharides, polyphenols, water-soluble vitamins and other bioactive components of liquid materials. According to the different methods of ice nucleation formation and ice crystal removal in the solution, freeze concentration can be divided into two technical systems: suspension type and gradual type. Among them, the structure of the suspension freeze-conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D9/02
CPCB01D9/0013B01D2009/0086
Inventor 钟瑞敏廖彩虎王锦红单斌谢思芸门戈阳肖仔君周小伟
Owner SHAOGUAN COLLEGE
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