RU2569021C1 - Device for liquids concentrating by freezing-out and ice production - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device for liquids concentrating by freezing-out and ice production contains a casing, a work bath with product inlet and outlet branches, installed in it cooling elements of ice freezer with coolant inlet and outlet branches, accumulating tank with cover for liquid gathering, circulating pump. The cooling elements are made in form of cylindrical tubes with the heat exchange ribs, located relatively to each other at angle 120°, located in staggered order in relation to each other, and such that angle between the ribs will be towards the product flow direction. The liquids are supplied to the work bath under pressure through the perforated header, that is part of the discharge pipeline. The accumulating tank has inclined perforated cover, made in form of the tray, the work bath is made with possibility of rotation by 90° for the ice unloading.

EFFECT: invention use increases the unit capacity due to increased surface area of the ice freezing, extends scope of application, intensifies processes of liquids concentrating by freezing out and ice freezing upon increased operation reliability.

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Description

The invention relates to refrigeration, and in particular to devices used in the food, pharmaceutical and microbiological industries, intended for the concentration of liquid media by freezing and ice.

The closest in technical essence and the achieved effect is a device that includes a housing, inside which there is a pallet for the initial product, a pipe for unloading ice, a pipe for supplying, overflowing and draining water, cooling elements of ice freezers with pipes for supplying and discharging refrigerant, a drainage tank to collect the product with a pump for the circulation of the product, as well as pipes connected hermetically with deaf bottoms, and nozzles for supplying and discharging refrigerant are cut into the passage bottoms. The cooling elements of the ice freezers are arranged vertically in the tray for the initial product. Ice is separated from the working elements under the action of gravity [Patent RU No. 2161760, publ. January 10, 2001].

The disadvantage of this ice maker is its low productivity due to insufficient surface area of the heat exchange of ice freezers, a limited scope, and also a significant process time.

The technical task of the invention is the development of a device for concentrating liquid media by freezing and producing ice, which allows concentrating liquid media by freezing, producing ice, increasing the productivity of the installation by increasing the surface area of freezing ice, expanding the scope of the proposed installation, intensifying the processes of concentration of liquid media by freezing and ice making , improve reliability.

The technical task of the invention is achieved by the fact that in the device for concentrating liquid media by freezing and producing ice, comprising a housing, a working bath with nozzles for supplying and discharging the product, cooling elements of ice freezers installed with it with nozzles for supplying and discharging refrigerant, a storage tank with a lid for collecting liquid, the circulation pump, new is that the cooling elements are made in the form of cylindrical tubes with heat exchange fins located relative to each other at an angle scrap 120 °, moreover, the heat-exchange fins are staggered with respect to each other and so that the angle between the fins is directed towards the movement of the product flow, the supply of liquid media to the working bath is carried out under pressure through a perforated manifold, which is equipped with a discharge pipe, storage the tank is equipped with an inclined perforated lid made in the form of a gutter, the working bath is rotatable 90 ° to unload ice.

The technical result of the invention is to increase the productivity of the installation, the intensification of the processes of concentration of liquid media by freezing and ice, and to increase the reliability.

In FIG. 1 shows a device for freezing and producing ice; in FIG. 2 is a section along AA in FIG. one; in FIG. 3 shows a cooling element with heat exchange fins; in FIG. 4 - volumetric image of the cooling element; in FIG. 5 - installation of a cooling element.

The device for freezing ice contains a housing 1, inside which there is a working bath 2 with thermal insulation 3 and a pipe 4 for draining the product. Under the working bath 2 there is a storage tank 5 for collecting the product, connected by a pipe 6 to a pump 7, a pipe 8 with a container for feeding the product and a pipe 18 with a container for draining the finished product. The storage tank 5 is equipped with an inclined perforated lid in the form of a groove 9 for removing frozen ice. A pump 7 for supplying a liquid medium to a working bath 2 is connected by a discharge pipe 10 provided with a perforated collector 19 for uniformly washing off cooling elements of ice freezers 11 with a working bath 2.

Cooling elements of ice freezers 11 are immersed in the working bath 11. Into the flow bottoms 13, refrigerant supply pipes 14 and refrigerant discharge pipes 15 are connected, connected to refrigerant supply pipelines 16 and refrigerant discharge pipelines 17. The refrigerant supply pipe 14 is made in the form of a tube laid inside the pipe the cooling element 11 and led with a gap to the inner surface of the deaf bottom 12. The number of freezers depends on the required installation capacity and the size of the production area.

On the outer surface of the cooling elements 11 and deaf bottoms 12 ice is frozen. The cooling elements of the ice freezers 11 are made in the form of cylindrical finned tubes with heat exchange fins located at an angle of 120 ° relative to each other, the heat exchange fins being staggered in relation to each other and so that the angle between the ribs is facing towards the movement of the product stream .

The cooling elements of the ice freezers 11 are located vertically in the upper working tank 2 with a distance from the deaf bottoms 12 to the inclined trough 9, sufficient to ensure free sliding of ice from the cooling elements 11 when thawing under the influence of gravity of ice.

The outer surface of the working bath 2 and the storage tank 5 is covered with insulating material.

A device for freezing and ice is as follows.

The product prepared for concentration by pipeline 8 enters the storage tank 5, from where it is taken by the pump 7 and fed into the working bath 2. Through pipeline 16, refrigerant is supplied to the cooling elements 11, which ensures freezing of ice on their side surface due to heat removal from the concentrated product, after which is discharged through pipeline 17.

The design of the cooling elements of the ice freezers 11, installed in a checkerboard pattern with respect to each other and made in the form of a cylinder with heat transfer ribs, has a developed heat transfer surface and ensures uniformity of ice freezing.

The product supplied under pressure from the perforated collector 19 in the working bath 2 acquires a directed turbulent movement due to uniform washing off of the cooling elements of the ice freezers 11 and, when the bath is overflowed through the pipe 4, the product is drained back to the storage tank 5. After freezing the ice to the nominal thickness the refrigerant supply to the cooling elements of the ice freezer 11 is stopped, the working bath 2 is rotated and from it a partially concentrated product is drained through a perforator the trough surface 9 of the trough 9 into the storage tank 5, after which hot refrigerant vapors (briefly) are supplied to the cooling elements of the ice freezers 11 through pipelines 16 and 17. Melted ice slides off the cooling elements 11 and, under the action of gravity, falls on an inclined perforated trough 9 and is discharged from the device. When unloading ice from the working bath 2, the remaining liquid enters through the perforated surface of the trough 9 into the storage tank 5.

After removal of the frozen-out ice, the working bath 2 assumes the initial position, and the freezing process is repeated if necessary.

The partially concentrated product is re-taken from the storage tank 5 by the pump 7 and fed into the working bath 2. Then, some more ice is released from the product by freezing, and even more concentrated product is drained through the pipe 4. Several more stages of ice freezing are possible to achieve the required concentration product. Then the concentrated product is discharged from the device through the pipe 18.

To obtain ice at this installation, liquid, for example water, is poured into the storage tank 5, and the described process is repeated.

The proposed device for freezing and producing ice allows: to increase the productivity of obtaining the necessary concentration of a liquid product, to intensify the processes of product concentration and ice production, to simplify the conditions for removing ice from work elements, to increase the reliability of the working installation.

Claims (1)

A device for concentrating liquid media by freezing and producing ice, comprising a housing, a working bath with nozzles for supplying and discharging the product, cooling elements of ice freezers installed in it with nozzles for supplying and discharging refrigerant, a storage tank with a lid for collecting liquid, a circulation pump, characterized the fact that the cooling elements are made in the form of cylindrical tubes with heat transfer ribs located relative to each other at an angle of 120 °, and the heat transfer ribs are placed in a checkerboard in order with respect to each other and so that the angle between the ribs is directed towards the movement of the product flow, the fluid is supplied to the working bath under pressure through a perforated manifold, which is equipped with a discharge pipe, the storage tank is equipped with an inclined perforated cover made in the form gutters, the working bath is rotatable 90 ° to unload ice.

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