Production device for continuous crystallization of mannose

Abstract

The utility model provides a production device for continuous crystallization of mannose, which relates to the technical field of sugar liquid crystallization and comprises a vertical crystallizing tank, a first-layer cooling coil pipe, a second-layer cooling coil pipe, a third-layer cooling coil pipe, a heat exchanger, a cooling water inlet pipe, a cooling water return pipe, a circulating water pump and a digital display thermometer, the cooling water inlet pipe is communicated with the three heat exchangers through branch pipelines, cooling control valves are arranged on the three branch pipelines, the temperature control system formed by the cooling coil pipes, the heat exchangers, the cooling water inlet pipe, the cooling water return pipe and the like is used for carrying out layered temperature control on the interior of the vertical crystallizing tank, and the aim of crystallizing is achieved; through crystallization in the mode, the production efficiency is greatly improved, crystals are thick and large, products are easy to store, the occupied space of a crystallizing tank can be reduced on the whole, automatic operation is more convenient, the crystallization period is long, and the crystals are large and stable in quality.

Description

Technical Field

[0001] The utility model relates to the technical field of sugar solution crystallization, in particular to a production device for continuous crystallization of mannose. Background Art

[0002] Industrial crystallization usually uses a horizontal crystallizer, which is selective for materials, has low output, occupies a large space, and is difficult to operate.

[0003] The finished product of mannose is fine powder crystals, which are formed by cooling and crystallizing under aqueous conditions. The solubility of mannose in water varies within a very small range with temperature, thus determining the crystal state of the product.

[0004] In the traditional crystallization tank process of producing mannose, due to the nature of mannose solubility, the final crystallized material becomes viscous, and the subsequent centrifugal load increases. In addition, the product crystals produced by the traditional crystallization method are small and easy to agglomerate, which cannot meet the needs of some customers.

[0005] To this end, the utility model provides a production device for continuous crystallization of mannose. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a production device for continuous crystallization of mannose, which solves the problems raised by the above-mentioned background technology.

[0007] To achieve the above purpose, the utility model is implemented by the following technical scheme: a production device for continuous crystallization of mannose, comprising a vertical crystallization tank, wherein a first layer of cooling coils, a second layer of cooling coils and a third layer of cooling coils are arranged at equal intervals from bottom to top inside the vertical crystallization tank, and both ends of the first layer of cooling coils, the second layer of cooling coils and the third layer of cooling coils are located outside the vertical crystallization tank and are connected to heat exchangers, each of the heat exchangers is provided with two medium channels, and each of the medium channels has an inlet and an outlet;

[0008] The water inlet ends of the first cooling coil, the second cooling coil and the third cooling coil are connected to a cooling water inlet pipe through one of the medium channels on the heat exchanger, and the water return ends of the first cooling coil, the second cooling coil and the third cooling coil are connected to a cooling water return pipe through another of the medium channels on the heat exchanger;

[0009] The cooling water inlet pipe is connected to the three heat exchangers through branch pipes, and the three branch pipes are provided with cooling control valves. Circulating water pumps and digital thermometers are provided between the three heat exchangers and the water inlet ends of the first cooling coil, the second cooling coil and the third cooling coil.

[0010] As a further technical solution of the utility model, a water make-up tank is connected between the three heat exchangers and the water inlet ends of the first cooling coil, the second cooling coil and the third cooling coil through pipes. The water make-up tank is respectively connected to the water inlet ends of the first cooling coil, the second cooling coil and the third cooling coil through pipes, and a control valve is arranged on the water make-up tank.

[0011] As a further technical solution of the utility model, an upper stirring motor is also provided in the middle of the top of the vertical crystallization tank, the output end of the upper stirring motor is located at the inner top of the vertical crystallization tank and is connected to an upper stirring rod, and a feed port is also provided on one side of the top of the vertical crystallization tank.

[0012] As a further technical solution of the utility model, a lower stirring motor is installed in the middle of the bottom end of the vertical crystallization tank, the output end of the lower stirring motor is located inside the vertical crystallization tank and is connected to a lower stirring rod, and a discharge port is also provided on one side of the bottom end of the vertical crystallization tank.

[0013] The utility model provides a production device for continuous crystallization of mannose, which has the following beneficial effects compared with the prior art:

[0014] The present invention discloses a production device for continuous crystallization of mannose. The temperature control system formed by various cooling coils, heat exchangers, cooling water inlet pipes and cooling water return pipes is used to control the temperature in a vertical crystallization tank in layers to achieve the purpose of crystallization. Crystallization in this way greatly improves production efficiency, and the crystals are coarse and the product is easy to preserve. In addition, the space occupied by the crystallization tank can be reduced as a whole. The automated operation is more convenient, the crystallization cycle is long, the crystals are large and the quality is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the structure of a production device for continuous crystallization of mannose.

[0016] In the figure: 1. Vertical crystallization tank; 2. First layer cooling coil; 3. Second layer cooling coil; 4. Third layer cooling coil; 5. Lower stirring motor; 51. Lower stirring rod; 6. Discharge port; 7. Upper stirring motor; 71. Upper stirring rod; 8. Feed port; 9. Cooling control valve; 10. Digital thermometer; 11. Heat exchanger; 12. Cooling water inlet pipe; 13. Cooling water return pipe; 14. Water supply tank; 15. Circulating water pump. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 The utility model provides a technical solution for a production device for continuous crystallization of mannose: a production device for continuous crystallization of mannose, comprising a vertical crystallization tank 1, wherein a first layer of cooling coils 2, a second layer of cooling coils 3 and a third layer of cooling coils 4 are arranged at equal intervals from bottom to top inside the vertical crystallization tank 1, and both ends of the first layer of cooling coils 2, the second layer of cooling coils 3 and the third layer of cooling coils 4 are located outside the vertical crystallization tank 1 and are connected to a heat exchanger 11, each heat exchanger 11 is provided with two medium channels, and each medium channel has an inlet and an outlet; the water inlet ends of the first layer of cooling coils 2, the second layer of cooling coils 3 and the third layer of cooling coils 4 are connected to the water inlet ends of the first layer of cooling coils 2, the second layer of cooling coils 3 and the third layer of cooling coils 4. One of the medium channels on the heat exchanger 11 is connected to a cooling water inlet pipe 12, and the return water ends of the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4 are connected to a cooling water return pipe 13 through another medium channel on the heat exchanger 11. The first cooling coil 2, the second cooling coil 3 and the third cooling coil 4 are connected to the three heat exchangers 11, and the cooling water inlet pipe 12, the cooling water return pipe 13 and the circulating water pump 15 are matched to form a cooling water circulation system, that is, a temperature control system is formed in the vertical crystallization tank 1 to perform layered temperature control inside the vertical crystallization tank 1 to achieve the purpose of crystallization;

[0019] The cooling water inlet pipe 12 is connected to the three heat exchangers 11 through branch pipes, and the three branch pipes are provided with cooling control valves 9. A circulating water pump 15 and a digital thermometer 10 are provided between the three heat exchangers 11 and the water inlet ends of the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4. The cooling water in the cooling water inlet pipe 12 is connected to one of the three heat exchangers 11 through the branch pipes by the function of the circulating water pump 15. The water flows through the inlet of the medium channel, and then is transported to the water inlet ends of the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4 respectively through the outlet of the medium channel, and then transported to the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4, and then flows back through the return water ends of the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4, and flows back to the cooling water return pipe 13 through another medium channel of the three heat exchangers 11.

[0020] A water replenishment tank 14 is also connected between the three heat exchangers 11 and the water inlet ends of the first layer cooling coil 2, the second layer cooling coil 3 and the third layer cooling coil 4 through a pipe. The water replenishment tank 14 is respectively connected to the water inlet ends of the first layer cooling coil 2, the second layer cooling coil 3 and the third layer cooling coil 4 through the pipe. A control valve is provided on the water replenishment tank 14. The water replenishment tank 14 can be used to replenish water at the water inlet ends of the first layer cooling coil 2, the second layer cooling coil 3 and the third layer cooling coil 4 to ensure the stability of the cooling water of each layer of the cooling coil.

[0021] An upper stirring motor 7 is also provided in the middle of the top of the vertical crystallization tank 1, and the output end of the upper stirring motor 7 is located at the top of the interior of the vertical crystallization tank 1 and is connected to an upper stirring rod 71. A feed port 8 is also provided on one side of the top of the vertical crystallization tank 1. A lower stirring motor 5 is installed in the middle of the bottom of the vertical crystallization tank 1, and the output end of the lower stirring motor 5 is located inside the vertical crystallization tank 1 and is connected to a lower stirring rod 51. A discharge port 6 is also provided on one side of the bottom of the vertical crystallization tank 1. When working, the upper stirring motor 7 and the lower stirring motor 5 can be turned on to work, thereby driving the upper stirring rod 71 and the lower stirring rod 51 to rotate and stir, so as to achieve stirring of the material and ensure that each layer of cooling coil can fully cool the material.

[0022] The working principle of the utility model is as follows: when working, each cooling control valve 9 is opened, and cooling water is filled into the cooling coils of each layer from the cooling water inlet pipe 12, that is, the first cooling coil 2, the second cooling coil 3 and the third cooling coil 4 are respectively filled with circulating water (i.e. cooling water), and the circulating water is preferably salt-free water, the purpose of which is to prevent scaling;

[0023] Then, the circulating water pump 15 on each layer of the cooling coil is started, so that the cooling water can circulate normally in the cooling coil and the heat exchanger 11 without resistance. Specifically, after the cooling water enters the heat exchanger 11, it circulates to the water inlet end of each cooling coil, and then flows back to the heat exchanger 11 from the return end of each cooling coil, and then flows back to the cooling water return pipe 13, forming a normal circulation of cooling water without resistance;

[0024] Further, the cooling coils are used to preheat the vertical crystallizer 1 before filling as required, and keep it warm, and then a certain concentration of mannose solution is injected into the vertical crystallizer 1 through the feed port 8 as required, and then the upper stirring motor 7 and the lower stirring motor 5 are turned on to drive the upper stirring rod 71 and the lower stirring rod 51 to rotate and stir, so as to achieve stirring of the material;

[0025] After the liquid is filled, the cooling water system is turned on (i.e. the cooling coils on each layer circulate), and then the cooling coils on each layer meet the temperature control requirements of each layer according to the cooling gradient, and the temperature data of each layer is checked through the digital thermometers on the cooling coils on each layer;

[0026] After the cooling is completed, the temperature of each layer is controlled, and the discharge port 6 is opened to start discharging the material. The discharge speed is matched with the feed speed to achieve the purpose of continuous crystallization.

[0027] It should be noted that during the operation of the entire device system, the crystal size and viscosity of the liquid should be observed frequently, and the discharge speed and temperature control requirements of each layer should be controlled according to the actual situation.

[0028] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A production device for continuous crystallization of mannose, comprising a vertical crystallization tank (1), characterized in that: A first layer of cooling coils (2), a second layer of cooling coils (3) and a third layer of cooling coils (4) are arranged at equal intervals from bottom to top inside the vertical crystallizer (1); both ends of the first layer of cooling coils (2), the second layer of cooling coils (3) and the third layer of cooling coils (4) are located outside the vertical crystallizer (1) and are connected to a heat exchanger (11); each of the heat exchangers (11) is provided with two medium channels, and each of the medium channels has an inlet and an outlet; The water inlet ends of the first cooling coil (2), the second cooling coil (3) and the third cooling coil (4) are connected to a cooling water inlet pipe (12) via one of the medium channels on the heat exchanger (11), and the water return ends of the first cooling coil (2), the second cooling coil (3) and the third cooling coil (4) are connected to a cooling water return pipe (13) via another of the medium channels on the heat exchanger (11); The cooling water inlet pipe (12) is connected to the three heat exchangers (11) via branch pipes, and the three branch pipes are each provided with a cooling control valve (9). A circulating water pump (15) and a digital thermometer (10) are provided between the three heat exchangers (11) and the water inlet ends of the first cooling coil (2), the second cooling coil (3) and the third cooling coil (4).

2. The production device for continuous crystallization of mannose according to claim 1, characterized in that: A water replenishment tank (14) is also connected between the three heat exchangers (11) and the water inlet ends of the first cooling coil (2), the second cooling coil (3) and the third cooling coil (4) via pipelines; the water replenishment tank (14) is respectively connected to the water inlet ends of the first cooling coil (2), the second cooling coil (3) and the third cooling coil (4) via pipelines; and a control valve is provided on the water replenishment tank (14).

3. The production device for continuous crystallization of mannose according to claim 1, characterized in that: An upper stirring motor (7) is also provided at the middle of the top of the vertical crystallization tank (1); the output end of the upper stirring motor (7) is located at the top of the interior of the vertical crystallization tank (1) and is connected to an upper stirring rod (71); and a feed port (8) is also provided at one side of the top of the vertical crystallization tank (1).

4. The production device for continuous crystallization of mannose according to claim 1, characterized in that: A lower stirring motor (5) is installed in the middle of the bottom end of the vertical crystallization tank (1); the output end of the lower stirring motor (5) is located inside the vertical crystallization tank (1) and is connected to a lower stirring rod (51); and a discharge port (6) is also provided on one side of the bottom end of the vertical crystallization tank (1).

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