Device for continuously preparing sucrose seed crystals in batches

Abstract

The utility model relates to a device for continuously preparing cane sugar seed crystals in batches, which comprises a cane sugar solution storage tank, an ethanol storage tank, an opposed nozzle mixing tank and a seed crystal collection storage box, and the opposed nozzle mixing tank comprises a mixing tank body and 1-2 groups of nozzles. Each group of nozzles consists of a cane juice nozzle and an ethanol nozzle which are oppositely arranged on the mixing tank body, the central axes of the cane juice nozzle and the ethanol nozzle in the same group of nozzles coincide, and the cane sugar solution storage tank is communicated with the cane juice nozzle of the mixing tank with the opposite nozzles through a pipeline; and the ethanol storage tank is communicated with the ethanol nozzle of the opposed nozzle mixing tank through a pipeline. The device is simple in structure, can be used for continuously preparing sucrose seed crystals on a large scale, and is high in production efficiency, and the prepared seed crystals are regular in shape, uniform in particle size distribution and good in quality.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sugar industry, especially relates to a device for continuously preparing sucrose seed crystals in batches. BACKGROUND

[0002] In the boiling crystallization process of sugar production from sugar cane or sugar beet, industrial crystallization is needed by adding seed crystals, and the quality of seed crystals, i.e. particle size distribution and morphology, directly affects the production efficiency and product quality.

[0003] At present, the commonly used seed crystals in the initial stage of sugar production are mostly prepared by grinding sugar products. Although such seed crystals are easy to obtain, they have unavoidable shortcomings. The seed crystals prepared by grinding are time-consuming and inefficient, and have a large particle size distribution range. The seed crystals contain a large number of fine crystals and have uneven crystal shape, which leads to easy preservation of color-forming substances and uneven particle size of the crystalline product. Moreover, the secondary nucleation phenomenon is more serious when using such seed crystals, which makes it difficult to control the actual amount of seed crystals and results in more fine crystals in the product. This leads to a longer crystallization cooking process, higher energy consumption, and difficulty in recovering the product during separation, which causes certain losses.

[0004] In existing public literature, there are reports on methods for preparing seed crystals using ultrasonic or hydrodynamic cavitation. However, the devices used in these methods are relatively small in scale and are prepared by intermittent operation. Currently, there is no device capable of continuously preparing large quantities of high-quality regular-shaped seed crystals. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a device for continuously preparing sucrose seed crystals in batches, which can continuously prepare sucrose seed crystals in batches, has high production efficiency, and produces seed crystals with regular shape, uniform particle size distribution, and good quality.

[0006] The technical solution to solve the above technical problems is: a device for continuously preparing sucrose seed crystals in batches, comprising a sucrose solution storage tank, an ethanol storage tank, an opposed nozzle mixing tank, and a seed crystal collection tank. The opposed nozzle mixing tank comprises a mixing tank body and 1-2 groups of nozzles. Each group of nozzles consists of a sucrose juice nozzle and an ethanol nozzle arranged opposite to each other on the mixing tank body. The central axes of the sucrose juice nozzle and the ethanol nozzle in the same group of nozzles coincide. The sucrose solution storage tank is connected to the sucrose juice nozzle of the opposed nozzle mixing tank through a pipeline, and the ethanol storage tank is connected to the ethanol nozzle of the opposed nozzle mixing tank through a pipeline.

[0007] Further, a double-headed plunger pump is also included. The sucrose solution storage tank and the ethanol storage tank are connected to the sucrose juice nozzle and the ethanol nozzle of the opposed nozzle mixing tank, respectively, through the double-headed plunger pump.

[0008] Furthermore, the opposing nozzle mixing tank is provided with two sets of nozzles, the central axes of the two sets of nozzles are located on the same plane and are perpendicular to each other.

[0009] Furthermore, the mixing tank is a structure consisting of an upper cylindrical section, a lower conical section, and a bottom outlet, with the upper end sealed and the lower end open, and the nozzle is disposed on the upper cylindrical section.

[0010] Furthermore, each set of nozzles extends into the interior of the mixing tank, and the distance D between the juice nozzle and the ethanol nozzle in each set of nozzles is 10-30 mm.

[0011] By adopting the above technical solution, this utility model has the following beneficial effects:

[0012] (1) It can continuously and in large quantities prepare sucrose seeds with high production efficiency. The prepared sucrose seeds have a complete and regular surface, good shape, uniform seed size distribution, and good quality.

[0013] (2) The equipment is simple. Only one reciprocating double-headed plunger pump can pump two materials at the same frequency, so that the two materials are evenly mixed in the opposing nozzle mixing tank.

[0014] (3) The seed crystals prepared by this invention are of good quality, which can make the sucrose crystal growth process in the subsequent boiling process stable, with fewer false crystals, fewer washing times, and greatly reduce the chance of impurities and pigments being encapsulated in the crystals. Therefore, the boiled seed sugar and finished sugar have uniform grains, high purity, and low color value, shorten the sugar boiling time, and have good product quality.

[0015] The technical features of an apparatus for continuous batch preparation of sucrose seed crystals according to the present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 : A schematic diagram of the structure of an apparatus for continuous batch preparation of sucrose seed crystals according to this utility model.

[0017] Figure 2 Top view of the opposing nozzle mixing tank of this utility model (equipped with 2 sets of nozzles).

[0018] Figure 3 : Figure 2 AA sectional view.

[0019] Figure 4 Top view of the opposing nozzle mixing tank of this utility model (with one set of nozzles).

[0020] In the diagram: 1-Sugar solution storage tank, 2-Ethanol storage tank, 3-Seed crystal collection tank, 4-Mixing tank with opposing nozzles, 41-Sugar cane juice nozzle, 42-Ethanol nozzle, 43-Mixing tank body, 431-Upper cylindrical section, 432-Lower conical section, 433-Bottom outlet, 5-Double-headed plunger pump. Detailed Implementation Example

[0021] An apparatus for continuous batch preparation of sucrose seed crystals, such as Figure 1 As shown, the system includes a sucrose solution storage tank 1, an ethanol storage tank 2, a opposed-nozzle mixing tank 4, a seed crystal collection tank 3, and a dual-headed plunger pump 5. The opposed-nozzle mixing tank 4 includes a mixing tank body 43 and two sets of nozzles. Each set of nozzles consists of a sucrose juice nozzle 41 and an ethanol nozzle 42 arranged opposite each other on the mixing tank body. The central axes of the sucrose juice nozzle 41 and the ethanol nozzle 42 in the same set of nozzles coincide, that is, the sucrose juice nozzle 41 and the ethanol nozzle 42 in the same set of nozzles are arranged 180° opposite each other (e.g., ...). Figures 2-3 (As shown). The sucrose solution storage tank 1 and ethanol storage tank 2 are connected to the juice nozzle 41 and ethanol nozzle 42 of the opposed nozzle mixing tank 4 respectively via a double-ended plunger pump 5. That is, the sucrose solution storage tank 1 and ethanol storage tank 2 are connected to the two inlets of the double-ended plunger pump 5 via pipes, and the two outlets of the double-ended plunger pump 5 are then connected to the juice nozzle 41 and ethanol nozzle 42 of the opposed nozzle mixing tank via pipes.

[0022] In this embodiment, the central axes of the two sets of nozzles in the opposed nozzle mixing tank 4 are located on the same plane and are perpendicular to each other. As a variation, the central axes of the two sets of nozzles can also be adjusted according to actual needs.

[0023] In this embodiment, the mixing tank 43 is a structure consisting of an upper cylindrical section 431, a lower conical section 432, and a bottom outlet 433, with the upper end sealed and the lower end open. The nozzle is disposed on the upper cylindrical section 431. As a variation, the specific shape of the mixing tank can also be changed according to actual conditions.

[0024] In this embodiment, each set of nozzles extends into the interior of the mixing tank, and the distance D between the juice nozzle and the ethanol nozzle in each set of nozzles is 10-30 mm, preferably 15 mm.

[0025] As a variation of this embodiment, the nozzles may also be provided in only one set, such as... Figure 4 As shown.

[0026] The working process of this utility model is as follows: At a temperature of 70-90℃, a sucrose solution with a supersaturation of 1.5-1.9 is prepared. This solution is then pumped into the juice nozzle 41 at one end of a double-ended plunger pump at a certain ratio (the ratio can be adjusted by turning the pump head knob). Simultaneously, ethanol at a certain temperature is pumped into the ethanol nozzle 42 at the other end. In other words, the sucrose solution entering the pump head of the double-ended plunger pump is compressed and pumped into the juice nozzle 41 of the opposing nozzle mixing tank 4. Because the double-ended plunger pump rotates coaxially and at the same frequency... During the compression process, ethanol simultaneously enters the other pump head of the dual-pump pump and is compressed and pumped into the ethanol nozzle 42 of the opposed nozzle mixing tank 4. In the opposed nozzle mixing tank 4, the sucrose solution and ethanol form a 180° opposed spray. The sucrose solution and ethanol come into instantaneous contact and mix evenly in the opposed nozzle mixing tank, and crystallization occurs. Finally, it flows to the seed collection tank 3. After staying in the seed collection tank for 60-300 seconds, sucrose seeds are obtained. That is, a certain amount of seeds are discharged from the bottom of the seed collection tank 3 at certain intervals.

[0027] The specific operating steps are as follows: (1) Sucrose solution temperature: 70-90℃; (2) Sucrose supersaturation: 1.5-1.9; (3) Ethanol temperature: -25℃ to room temperature; (4) Mass ratio of sucrose solution to ethanol: (0.5-2):1; (5) Inlet pressure of sucrose solution and ethanol: 0.1-0.8MPa.

[0028] The prepared sucrose seed crystals have regular shapes and uniform particle size distribution.

Claims

1. An apparatus for the continuous batch production of sucrose seed crystals, characterized by: The device comprises a sucrose solution storage tank (1), an ethanol storage tank (2), an opposed nozzle mixing tank (4) and a seed collecting tank (3), wherein the opposed nozzle mixing tank (4) comprises a mixing tank body (43) and 1-2 groups of nozzles, each group of nozzles comprises a sucrose nozzle (41) and an ethanol nozzle (42) oppositely arranged on the mixing tank body, the central axes of the sucrose nozzle and the ethanol nozzle in the same group of nozzles coincide, the sucrose solution storage tank is communicated with the sucrose nozzle of the opposed nozzle mixing tank through a pipeline, and the ethanol storage tank is communicated with the ethanol nozzle of the opposed nozzle mixing tank through a pipeline.

2. A device for continuously batch producing sucrose seed crystals according to claim 1, characterized in that: The device further comprises a double-headed plunger pump (5), and the sucrose solution storage tank (1) and the ethanol storage tank (2) are respectively communicated with the sucrose nozzle and the ethanol nozzle of the opposed nozzle mixing tank (4) through the double-headed plunger pump.

3. The apparatus for continuously batch producing sucrose seed crystals according to claim 1, wherein: The opposed nozzle mixing tank (4) is provided with 2 groups of nozzles, and the central axes of the 2 groups of nozzles are located on the same plane and perpendicular to each other.

4. The apparatus for continuously batch producing sucrose seed crystals according to claim 1, wherein: The mixing tank body (43) is an upper-end sealed and lower-end open structure which comprises an upper cylindrical segment (431), a lower conical segment (432) and a bottom outlet (433), and the nozzles are arranged on the upper cylindrical segment.

5. A device for continuous batch production of sucrose seed crystals according to any one of claims 1 to 4, characterized in that: Each group of nozzles extends into the interior of the mixing tank body, and the spacing D between the sucrose nozzle and the ethanol nozzle in each group of nozzles is 10-100 mm.

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