RU225386U1 - CRYSTALLIZER - Google Patents

Abstract

The utility model relates to sugar production, in particular to equipment for sugar crystallization. The crystallizer includes a composite cylindrical body 1, mounted from frames 13 located vertically and fastened together, and load-bearing beams 3 mounted on supports 2, located in the upper part of the body 1, on which hydraulic lifts 4 are mounted to impart reciprocating motion to the associated vertical power hollow pipes 5, a cooling system 6 containing water pipes 7 placed inside power vertical hollow pipes 5 and moving together with the latter, horizontal cooling sections 8 mounted inside the housing 1, as well as a massecuite distributor 9, made in the form of an impeller with blades 10 s the possibility of its rotation relative to the central axis in a horizontal plane, and the inlet pipe 11 for supplying massecuite, the outlet of which is located in the area adjacent to the axis of rotation of the distributor, and inside the housing, under the lower cooling section, a cooled massecuite output unit 12 is mounted. Housing 1 is mounted from vertically located and fastened together by drawers 13. The cooling system 6 is closed, with the horizontal cooling sections 8 formed in the form of a set of pipes 14 with inlets and outlets connected to each other and to vertical water pipes 7, while the cooling system also includes flexible connections 15 , pump 16, heat exchanger 18 and expansion tank 19. The blades 10 of the distributor impeller 9 have different lengths. The unit for outputting and unloading chilled massecuite 12 is made in the form of an inverted truncated cone 17. 5 z.p. f-ly, 4 ill.

Description

The utility model relates to sugar production, in particular to equipment for sugar crystallization.

The crystallizer is designed for cooling massecuite - the final product of sugar production. Massecuite is a mixture of crystals and intercrystalline solution. When cooled, crystals grow in the massecuite and the sucrose content in the intercrystalline solution decreases. Accordingly, the lower the temperature of the massecuite at the outlet of the crystallizer, the less loss of sucrose in the molasses - the intercrystalline solution of the final product, which ultimately makes it possible to obtain a greater percentage of sugar from the incoming massecuite and, accordingly, the yield of white sugar in production as a whole.

There is a well-known “Installation for the production of boiled condensed milk with sugar” (description of a useful part to the RF patent No. 101618; IPC: A23C 9/18; publication date: 01/27/2011), consisting of at least a vacuum crystallizer, a calorizer and a circulation pump, sequentially connected into a production line through pipelines with the possibility of circulating raw materials through it for the production of boiled condensed milk with sugar, while the vacuum crystallizer is designed with the ability to mix the raw materials during its circulation along the production line.

The known “Installation for the production of a condensed milk product with melted sugar” (description of a useful part to the RF patent No. 107665; IPC: A23C 9/00; publication date: 08.27.2011), consisting of at least a vacuum crystallizer, a calorizer and circulation pump, sequentially connected into a production line through pipelines with the possibility of circulating raw materials through it for the production of a baked condensed milk product with sugar, while the vacuum crystallizer is configured with the ability to mix the raw materials during its circulation along the production line.

Known is the “Unit of a vacuum evaporation apparatus for evaporation and crystallization of a sugar solution” (description of a useful part to the RF patent No. 86109; IPC: B01D 1/00, C13G 1/02; publication date PCT: 10/11/2007), containing a mechanical circulator assembly, a circulator shaft with blades or other elements imparting motion attached to a hub mounted at its inner end, a gearbox driven by an electric motor mounted at its other (outer) end, sealing means, a bearing and a split retaining ring located under said bearing , while the sealing means and the bearing of the mechanical circulator assembly are located entirely inside the evaporator vacuum apparatus.

The “Crystallizer” is known (description of useful part to RF patent No. 107157; IPC: C13B 30/02; publication date: 08/10/2011), consisting of a double-walled bath equipped with a stirrer, a lid and additionally containing a device for magnetic processing of syrup.

The well-known “Mixer-crystallizer of periodic action” (description of a useful part to the RF patent No. 122651; IPC: C13B 30/02; publication date: 12/10/2012), installed on a vertical shaft located in the circulation channel of the thermal chamber of a vacuum apparatus, and consisting from a disk having radially located windows equipped with inclined blades, rigidly fixed to the disk and located with a concave surface towards the windows, while the disk is fixed on a vertical shaft installed in the circulation channel from above, ensuring centering of the mixer in the heat chamber.

The “Air-cooled stirrer-crystallizer” is known (description of the useful part to the RF patent No. 114053; IPC: C13B 30/00; publication date: 03/10/2012), consisting of a horizontal trough-shaped housing in which a shaft rotates with mixing blades mounted on it , on which blades are mounted, mounted obliquely relative to the blades to give the massecuite an impulse to move towards the discharge opening of the mixer, while an air duct system is installed above the mixer-crystallizer to cool the massecuite by supplying cooled air directly to its surface.

Also known is the “Air-cooled crystallizer” (description of useful part to RF patent No. 56382; IPC: C13F 1/02; publication date: 08/27/2011), consisting of a horizontal trough-shaped housing in which a hollow shaft with heat exchange disks mounted on it rotates , while the cooling of the massecuite in the crystallizer occurs through the use of two flows of cooling air: for the first flow, a system of channels passing through the disks is used, for the second flow, horizontal longitudinal channels are used, connected to U-shaped radial air channels located along the inner surface of the crystallizer bath .

The technical objective of the proposed utility model is to increase the efficiency of the process and increase the content of sugar crystals in the cooled massecuite relative to the received massecuite due to the possibility of cooling it at the outlet of the crystallizer to a temperature within 40°C, which is significantly lower than in crystallizers of known designs.

To solve this problem, the crystallizer includes a composite cylindrical body mounted on a support, load-bearing beams located in the upper part of the body, on which hydraulic lifters are mounted to impart reciprocating motion to the associated power vertical hollow pipes, a cooling system containing water pipes placed inside power vertical hollow pipes and moving together with the latter, and N horizontal cooling sections mounted inside the housing, as well as a massecuite distributor, made in the form of an impeller with blades with the possibility of its rotation relative to the central axis in a horizontal plane, and an inlet pipe for supplying massecuite, outlet which is located in the area adjacent to the axis of rotation of the distributor, and a finished product output unit is mounted inside the housing under the lower cooling section.

The crystallizer body is mounted from frames arranged vertically and fastened together.

The cooling system is closed, including flexible connections, a pump for pumping and circulating coolant, as well as a heat exchanger and an expansion tank, while the horizontal cooling sections are formed in the form of a set of pipes with inlets and outlets connected to each other and to vertical water pipes.

For uniform distribution and, accordingly, cooling of the massecuite passing through the cooling sections, the distributor impeller blades have different lengths.

The chilled massecuite unloading unit is made in the form of an inverted truncated cone.

The technical result of the proposed utility model is the elimination of the need to use a mixer for incoming massecuite due to its uniform distribution over the area of the cooling elements, effective vertical movement under the influence of gravity through the reciprocating cooling elements, and, as a result, an increase in the yield of finished raw materials relative to the incoming one by preventing the formation of a crust due to the constant movement of the cooling elements vertically and increasing the ratio of the area of the cooling pipes to the volume of the loaded massecuite, which makes it possible to cool the massecuite at its outlet to a temperature within 40°C, which is significantly lower than in crystallizers of known designs.

In fig. Figure 1 schematically shows a general cross-sectional view of the crystallizer.

In fig. Figure 2 shows a diagram of the cooling system.

In fig. Figure 3 schematically shows a section of the cooling system.

In fig. Figure 4 shows a sketch of a massecuite distributor.

The crystallizer includes a composite cylindrical body 1, mounted from frames 13 arranged vertically and fastened together and supporting beams 3 installed on supports 2, located in the upper part of the body 1, on which hydraulic lifts 4 are mounted to impart reciprocating motion to the power vertical hollows associated with them pipes 5, a cooling system 6 containing water pipes 7 placed inside power vertical hollow pipes 5 and moving together with the latter, N horizontal cooling sections 8 mounted inside the housing 1, as well as a massecuite distributor 9, made in the form of an impeller with blades 10 s the possibility of its rotation relative to the central axis in a horizontal plane, and the inlet pipe 11 for supplying massecuite, the outlet of which is located in the area adjacent to the axis of rotation of the distributor, and a cooled massecuite output unit 12 is mounted inside the housing under the lower cooling section.

Housing 1 is mounted from drawers 13 arranged vertically and fastened together.

The cooling system 6 is closed, with the horizontal cooling sections 8 formed in the form of a set of pipes 14 with inlets and outlets connected to each other and to vertical water pipes 7, while the cooling system also includes flexible leads 15, a pump 16, a heat exchanger 18 and expansion tank 19.

The blades 10 of the distributor impeller 9 have different lengths.

The unit for outputting and unloading cooled massecuite 12 is made in the form of an inverted truncated cone 17.

When the crystallizer is operating, the hot massecuite passes through the inlet pipe 11, made in the housing 1 above the upper cooling section 8, to the rotating impeller of the distributor 9, the blades 10 of which, due to their different lengths, evenly distribute it inside the crystallizer. Next, the process of cooling the massecuite occurs as it moves from top to bottom inside the crystallizer body due to contact with the cooling sections in which water moves from bottom to top. At the same time, a vertical reciprocating movement of the power hollow vertical pipes 5 occurs together with the water pipes 7 located inside them and the cooling sections 8 fixed between them with an amplitude of the order of 1 meter. The cyclic reciprocating movement of the power pipes 5 occurs through the hydraulic lifts 4 associated with them, mounted on the supporting beams 3, with a frequency of 1 cycle every 3-5 minutes. To ensure the supply of coolant from the stationary pump 16 and hydraulic cylinders to the movable units of the cooling system, flexible connections 15 are used. The cooled massecuite passed through the crystallizer enters the unloading unit 12, made in the form of an inverted truncated cone 17, and is removed outside the crystallizer for further processing.

The use of the proposed utility model increases the yield of finished products in sugar production (white sugar) by reducing the loss of sucrose in molasses.

Claims (6)

1. A crystallizer, including a composite cylindrical body mounted on a support, load-bearing beams located in the upper part of the body, on which hydraulic lifters are mounted to impart reciprocating motion to the associated power vertical hollow pipes, a cooling system containing water pipes located inside the power vertical hollow pipes and moving together with the latter, and horizontal cooling sections mounted inside the housing, as well as a massecuite distributor, made in the form of an impeller with blades with the possibility of its rotation relative to the central axis in a horizontal plane, and an inlet pipe for supplying massecuite, the outlet of which is located in the area adjacent to the axis of rotation of the distributor, and inside the housing under the lower cooling section, a finished product output unit is mounted. 2. The crystallizer according to claim 1, characterized in that its body is mounted from drawers located vertically and fastened together. 3. The crystallizer according to claim 2, characterized in that the cooling system is closed, with the horizontal cooling sections formed in the form of a set of pipes with inlets and outlets connected to vertical water pipes. 4. The crystallizer according to claim 3, characterized in that the cooling system includes flexible leads, a pump, a heat exchanger and an expansion tank. 5. The crystallizer according to claim 1, characterized in that the blades of the distributor impeller have different lengths. 6. The crystallizer according to claim 1, characterized in that the cooled massecuite output unit is made in the form of an inverted truncated cone for unloading it.