A device for preventing ice blockage in a device for preparing ice slurry by supercooling

Abstract

The invention discloses a method for preventing an ice-slurry preparing device adopting a super-cooling method from generating ice blockage and a device thereof. An ice-making fluid firstly flows through a fluid pulsation generating device before entering a super cooler, so that flow and pressure of the ice-making fluid generate pulsation; then, the fluid is cooled and super-cooled in the super cooler, and velocity gradient near the wall surface of the super cooler is increased by virtue of the fluid pulsation, so that fluid shearing force is increased, and ice crystal particles are prevented from being adhered on the surface of the super cooler, thereby preventing ice blockage. The device comprises a pulsation generating device, a flow meter, an ice slurry generating device, an ice storage slot, an ice crystal filter device and a related valve. According to the device, the pulsation generating device is mounted in front of the super cooler, so that on one hand, pulsation of the fluid in the super cooler is reinforced, a heat exchange coefficient is increased, formation of an ice layer is avoided, heat exchange thermal resistance is reduced and heat exchange efficiency of the super cooler is integrally improved; and on the other hand, the problem that an ice slurry generating process adopting the super-cooling method is liable to generate ice blockage is solved.

Description

technical field [0001] The invention relates to a method for preventing ice blockage in a device for preparing ice slurry by a supercooling method. The invention also relates to a device for carrying out the method. Background technique [0002] The supercooled water ice slurry preparation technology is a kind of indirect ice making technology, which has the characteristics of no mechanical moving parts and simple equipment, and is suitable for cold storage air conditioners. In the process of using the supercooling method to produce ice slurry, the cold energy needs to be transferred from the wall of the heat exchanger to the inside of the ice-making fluid. There is a temperature gradient near the wall of the subcooler, and the temperature of the wall is low, and the cooling fluid is very easy to flow near the wall. Heterogeneous nucleation occurs and ice crystals are formed, which adhere to the heat exchange wall to further form an ice layer. On the one hand, during the h...

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Problems solved by technology

[0004] At present, the methods to prevent ice blockage of subcooler mainly include the use of additives and improvement of the wall surface of the subcooler. Among them, the mechanism of using additives to prevent ice blockage is to reduce the freezing temperature of the fluid to inhibit crystallization, and reduce the size of ice crystal particles to reduce adhesion. However, the formation and viscosity of ice crystals cannot be completely suppressed. Once the adhesion of ice crystals occurs, an ice layer will inevitably form. In addition, the use of additives reduces the use temperature of ice slurry, which limits the application of ice slurry; improve the subcooler The condition of the wall surface can reduce the adhesion of ice crystals to a certain extent, but the effect is limited, and the effect will be lost after the ice layer appears

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