Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger

A heat exchanger and fluidization technology, which is applied in the field of making fluidized ice slurry by a butterfly double-sided scraped surface heat exchanger, can solve the problems of design and manufacturing difficulties, large heat exchanger volume, and increased manufacturing costs. , to achieve the effect of eliminating ice blockage, improving heat transfer effect and reducing auxiliary energy consumption

Inactive Publication Date: 2012-04-11
秦贯丰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this kind of scraped surface heat exchanger only uses the inner surface of the cylinder, as the cooling capacity increases, the cooling heat exchange area provided per unit volume cannot keep up. When the enlarged design is carried out, the volume of the heat exchanger will decrease. It becomes bulky, takes up space, and when the refrigerant is under pressure, as a pressure vessel, the large jacket circumference diameter will bring difficulties to design and manufacture, and greatly increase the manufacturing cost
On the other hand, the scraper will generate auxiliary energy consumption when scraping off ice crystals, especially for ice crystals formed in water. Due to the strong adhesion of ice crystals on the cooling surface and the resulting hard ice crystals, greater scraper tension and rotation are required. It takes a moment to scrape off the ice crystals, which greatly increases the auxiliary energy consumption

Method used

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  • Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger
  • Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger
  • Method and device for preparing fluidized ice slurry with disc type double-sided scraped-surface heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 of a device for preparing fluidized ice slurry using a dish-type double-sided scraped surface heat exchanger of the present invention is as figure 1 with figure 2 As shown, it includes a dish-type double-sided scraped surface heat exchanger 3, an ice crystal ripening device 9 and a delivery pump 11. The ice crystal ripening device 9 is located above the scraped surface heat exchanger 3, and the inlet 91 of the ice crystal ripening device 9 It is connected to the scraped surface heat exchanger 3, and the discharge port 92 of the ice crystal ripening device 9 is connected to the delivery pump 11. The scraped surface heat exchanger 3 includes a refrigerating disc 31, a scraper 5 and a rotating shaft 33. The refrigerating disc 31 is opened in the middle. Through the perforation 311, the rotating shaft 33 passes through the perforation 311 vertically. The refrigerating disc 31 includes two refrigerating surfaces 312. Both sides of the refrigerating surface are provid...

Embodiment 2

[0063] Example 2 of a device for preparing fluidized ice slurry using a dish-type double-sided scraped surface heat exchanger of the present invention is as image 3 with Figure 4 As shown, the difference from Embodiment 1 is that the scraper 5 is composed of a plurality of spiral blade hobs 51 and a straight blade 52. Specifically, the shape of the blade 511 of the spiral blade hob 51 is composed of forward and reverse threads. The distance between the blade 51 of the spiral blade hob and the cooling surface 312 is 0.4-0.8 mm.

[0064] When the cooled water is an aqueous solution, the ice crystals formed in the aqueous solution are usually agglomerated by a large number of dendritic crystals, which are relatively soft and easy to scrape off; when the cooled pure water is pure water, the ice crystals formed in the water are usually brittle and hard , Stronger adhesion to the cooling surface 312, relatively harder to scratch

[0065] drop. Therefore, a scraper 5 composed of a spi...

Embodiment 3

[0068] A method for preparing fluidized ice slurry using a device for preparing fluidized ice slurry using a dish-type double-sided scraped surface heat exchanger of the present invention, such as Figure 1 to Figure 4 As shown, it includes the following steps:

[0069] Step A: Pass the refrigerant 1 into the refrigerating disc of the scraped surface heat exchanger, and the cooled water or aqueous solution 6 forms ice crystals on the two refrigerating surfaces 312 of the refrigerating disc 31, and the ice crystals are attached to the refrigerating surface 312 up;

[0070] Step B: The rotating shaft 33 drives the scraper 5 to rotate, and at the same time the ultrasonic transducer 8 is activated to generate ultrasonic vibration and act on the cooled water or aqueous solution 6 and the refrigerating disc 31, and the scraper 5 scrapes off the ice crystals on the refrigerating surface 312;

[0071] Step C: The scraped ice crystals float up to the entrance 91 of the ice crystal riper 9 and...

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PUM

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Abstract

The invention discloses a method and device for preparing fluidized ice slurry with a disc type double-sided scraped-surface heat exchanger. The device comprises a disc type double-sided scraped-surface heat exchanger, an ice crystal ager and a delivery pump, wherein the ice crystal ager is located above the scraped-surface heat exchanger; an inlet of the ice crystal ager is communicated with the scraped-surface heat exchanger; a discharge hole of the ice crystal ager is connected with the delivery pump; the scraped-surface heat exchanger comprises a refrigeration disc, a scraper and a rotary shaft; a through hole is formed in the middle of the refrigeration disc; the rotary shaft vertically passes through the through hole; the refrigeration disc comprises two refrigeration surfaces; and the scraper is close to the refrigeration surfaces and is fixed on the rotary shaft. The device disclosed by the invention has the advantages of simple structure, good heat transfer effect and low energy consumption.

Description

technical field [0001] The invention relates to freeze concentration technology, in particular to a method and device for preparing fluidized ice slurry with a butterfly-type double-sided scraped surface heat exchanger, which is suitable for freezing concentrated fruit juice, milk and other aqueous solutions, and can also be used for ice-making cold storage technology field. Background technique [0002] Fluidized ice slurry refers to the formation of ice crystals after cooling in water or an aqueous solution. The ice crystals are finely divided and mixed with water to form a pumpable fluidized ice slurry. Fluidized ice slurry has higher heat transfer efficiency than ice cubes, and the refrigerant required to produce fluidized ice slurry generally only needs to be -5 to -7°C. Therefore, fluidized ice slurry is widely used in freezing Concentration and other technical fields. [0003] Freeze concentration technology is to cool water or aqueous solution to the freezing point...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25C1/12F25C5/12F25C5/00
Inventor 秦贯丰廖力奋杨晓西
Owner 秦贯丰
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