Forced circulation sugar boiling crystallizing tank stirrer

Abstract

The utility model discloses a forced circulation sugar boiling crystallizing tank stirrer, which comprises a tank body, an evaporator and a forced circulation stirrer, the evaporator is arranged inside the tank body, the part inside the tank body corresponding to the evaporator is a heating chamber, and the center of the heating chamber is provided with a downcomer channel; a plurality of vertical heating pipes are arranged on the peripheral side of the downcomer channel, the forced circulation stirrer extends into the tank from the center of the top of the tank body and penetrates into the slurry channel, and forced circulation paddles are arranged at the bottom of the forced circulation stirrer and located at the bottom of the slurry channel; the circulating driving assembly is mounted at the top of the tank body and is in transmission connection with the top of the main shaft; and the plurality of bottom flow pushing mechanisms are distributed between the heating chamber and the bottom in the tank body. According to the crystallization tank, the problem that massecuite overflows at the bottom in the forced circulation process of a traditional crystallization tank can be solved, so that the massecuite can smoothly pass through the evaporator for sufficient heat exchange, and the massecuite is uniformly heated.

Description

Technical Field

[0001] The utility model relates to the technical field of sugar making equipment, and in particular to a forced circulation sugar boiling crystallization tank agitator. Background Art

[0002] Boiling sugar is a key link in the production process of sugar-making enterprises. Its main task is to concentrate the syrup (or molasses) to a certain degree of supersaturation in the sugar-making tank, precipitate the sucrose crystals that meet the requirements, grow the crystals, and boil them into good sugar paste; then, after assisting crystallization and removing the mother liquor with a centrifuge, good quality crystallized sugar is obtained. In our country, manual operation has always been based on human experience. The human factor has a very obvious impact on the quality of white sugar. The quality of sugar boiled by operators with different proficiency under the same conditions is also different. Moreover, due to the difference in sugar boiling level, it is often impossible to achieve higher sugar boiling efficiency and the best white sugar quality with lower energy consumption. The crystallizer is a crystallization equipment, which is widely used in the fields of material mixing, cooling and freezing, finished product crystallization, etc. in pharmaceuticals. In addition, it is also widely used in the dairy industry, food, chemical industry, beverage and other industries. Especially for sugar-making enterprises, the crystallizer is an indispensable sugar-making equipment. With the continuous development of science and technology and the advancement of technology, most sugar factories now generally adopt crystallization tanks to automatically boil sugar. Since the sugar boiling automation system can optimize and control the curves that affect various parameters of sugar boiling, it can save energy, reduce labor, reduce production costs, improve efficiency, and increase the output and quality of white sugar, effectively enhancing the core competitiveness of the enterprise.

[0003] Although the sugar boiling automation system is adopted, there are still many problems in the traditional crystallizer using this system. For example, Chinese patent CN201220247281.7 discloses a sugar boiling crystallizer, in which a forced circulation device is arranged in the crystallizer, and the circulation of the sugar paste inside is forced to circulate by the slurry in the middle. The sugar paste pushed out will be blocked by the flow limiter when passing through the evaporator, so that the sugar paste is repeatedly gathered to the bottom center, forming a continuous surge at the bottom of the crystallizer, and the sugar paste at the top of the tank cannot be circulated smoothly, resulting in uneven material concentration in various parts of the tank, poor circulation of the sugar paste in the tank, and uneven heating, which leads to problems such as long sugar boiling time, high energy consumption, and increased color value of finished sugar. Summary of the invention

[0004] The utility model provides a forced circulation sugar boiling crystallization tank agitator, which can solve the problem of sugar paste surging at the bottom during the forced circulation of the traditional crystallization tank, so that the sugar paste can smoothly pass through the evaporator, fully exchange heat, and heat the sugar paste evenly.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A forced circulation sugar boiling and crystallizing tank agitator, comprising a tank body, an evaporator and a forced circulation agitator. The evaporator is arranged inside the tank body. The part of the tank body corresponding to the evaporator is a heating chamber. The center of the heating chamber is set as a slurry channel. A number of vertical heating tubes are arranged on the periphery of the slurry channel. A discharge port is arranged at the bottom of the tank body. The forced circulation agitator includes a central forced stirring mechanism and a number of bottom flow-pushing mechanisms. The central forced stirring mechanism includes a circulation driving assembly, a main shaft, a bottom main shaft bearing bracket and a forced circulation paddle. The main shaft extends into the tank from the center of the top of the tank body and penetrates into the slurry channel. The periphery of the bottom main shaft bearing bracket is fixedly connected to the inner wall of the top of the slurry channel, and the center of the bottom main shaft bearing bracket is rotatably connected to the main shaft through a bracket bearing. The forced circulation paddle is fixedly connected to the bottom of the main shaft and is located at the bottom of the slurry channel. The circulation driving assembly is installed on the top of the tank body and is drivingly connected to the top of the main shaft. A number of the bottom flow-pushing mechanisms are distributed between the heating chamber and the inner bottom of the tank body for pushing the sugar solution at the bottom of the tank body into the vertical heating tubes.

[0007] Further, the bottom flow-pushing mechanism includes a flow-pushing driving assembly, a flow-pushing driving shaft and a flow-pushing paddle. One end of the flow-pushing driving shaft extends into the tube from the bottom of the tank body and penetrates below the heating chamber and is fixedly connected to the flow-pushing paddle. The flow-pushing driving assembly is installed outside the bottom of the tank body and is drivingly connected to the other end of the flow-pushing driving shaft.

[0008] Further, the pushing direction of the forced circulation paddle is downward, and the pushing direction of the flow-pushing paddle is upward.

[0009] Further, a ring-shaped baffle extends vertically downward from the bottom of the slurry channel.

[0010] Further, a number of guide plates are arranged between the forced circulation paddle and the bottom main shaft bearing bracket in the slurry channel. The a number of guide plates are vertically connected to the inner wall of the slurry channel, and the a number of guide plates are equally angularly distributed around the main shaft circumference.

[0011] Further, the circulation driving assembly includes a driving motor, a gear speed reducer, a top bearing and a top bearing seat. The top bearing seat is fixedly connected to the top of the tank body. The top bearing is installed in the top bearing seat and is coaxially arranged with the bracket bearing. The main shaft is rotatably connected to the top bearing seat through the top bearing. The gear speed reducer is installed on the top of the top bearing seat. The driving motor is installed on the gear speed reducer, and the output end of the driving motor is drivingly connected to the input end of the gear speed reducer. The output end of the gear speed reducer is drivingly connected to the top of the main shaft.

[0012] Furthermore, shaft seals are provided at both ends of the bracket bearing.

[0013] The beneficial effects of the utility model are:

[0014] 1) The utility model brings the sugar paste from the top of the evaporator to the bottom of the evaporator through the central forced stirring mechanism. The sugar paste is pushed and dispersed to the surroundings along the bottom of the crystallizer, enters the evaporator, and flows back to the top of the evaporator again. During the operation of the sugar paste, the flow speed of the sugar paste in the evaporator is accelerated by the bottom flow pushing mechanism, and the flow of the sugar paste toward the bottom center of the crystallizer is reduced, so that the sugar paste and the evaporator can fully exchange heat, and the sugar paste in the upper and lower parts of the tank can be well circulated, thereby improving the sugar boiling efficiency.

[0015] 2) During operation, the forced circulation blades face downward, and the push flow direction of the push flow blades faces upward. This design can apply thrust to the massecuite entering the vertical heating tube, speed up the movement of the massecuite in the vertical heating tube, and the annular baffle can further limit the flow direction of the massecuite to prevent the massecuite from flowing toward the bottom center of the crystallization tank.

[0016] 3) A plurality of guide plates are provided between the forced circulation blades and the bottom main shaft bearing bracket, which can weaken the swirling vortex of the massecuite above the forced circulation blades, optimize the pressure distribution before and after the forced circulation blades, and make the massecuite move only downward.

[0017] 4) The bracket bearing and the top bearing together ensure the center verticality of the spindle to avoid abnormal vibration when the spindle rotates, which may aggravate the spindle loss.

[0018] 5) Both ends of the bracket bearing are equipped with shaft seals to prevent sugar paste from entering the bracket bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the forced circulation blade and the annular baffle of the utility model;

[0022] Figure ID:

[0023] 1 - Tank body, 2 - Evaporator, 21 - Slurry channel, 22 - Vertical heating tube, 23 - Annular baffle plate, 24 - Deflector, 3 - Central forced stirring mechanism, 4 - Bottom flow-pushing mechanism, 31 - Circulation driving assembly, 32 - Main shaft, 33 - Bottom main shaft bearing bracket, 34 - Forced circulation paddle, 35 - Bracket bearing, 36 - Shaft seal, 41 - Flow-pushing driving assembly, 42 - Flow-pushing driving shaft, 43 - Flow-pushing paddle, 311 - Driving motor, 312 - Gear reducer, 313 - Top bearing, 314 - Top bearing seat. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a component is referred to as being "disposed in the middle", it is not only disposed at the exact middle position, as long as it is not disposed at the two end parts, it belongs to the range defined by the middle part. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Refer to Figures 1 to 2As shown in the figure, a forced circulation sugar boiling and crystallization tank agitator includes a tank body 1, an evaporator 2, and a forced circulation agitator. The evaporator 2 is arranged inside the tank body 1. The part of the tank body 1 corresponding to the evaporator 2 is a heating chamber. The center of the heating chamber is set as a slurry channel 21. A number of upright heating tubes 22 are arranged on the periphery of the slurry channel 21. A discharge port is arranged at the bottom of the tank body 1. The forced circulation agitator includes a central forced agitation mechanism 3 and a number of bottom flow-pushing mechanisms 4. The central forced agitation mechanism 3 includes a circulation driving assembly 31, a main shaft 32, a bottom main shaft bearing bracket 33, and a forced circulation paddle 34. The main shaft 32 extends from the center of the top of the tank body 1 into the tank and passes through the slurry channel 21. The periphery of the bottom main shaft bearing bracket 33 is fixedly connected to the inner wall of the top of the slurry channel 21, and the center of the bottom main shaft bearing bracket 33 is rotationally connected to the main shaft 32 through a bracket bearing 35. The forced circulation paddle 34 is fixedly connected to the bottom of the main shaft 32 and is located at the bottom of the slurry channel 21. The circulation driving assembly 31 is installed on the top of the tank body 1 and is drivingly connected to the top of the main shaft 32. A number of the bottom flow-pushing mechanisms 4 are distributed between the heating chamber and the inner bottom of the tank body 1 to push the sugar solution at the bottom of the tank body 1 into the upright heating tubes 22. Among them, the bottom flow-pushing mechanism 4 includes a flow-pushing driving assembly 41, a flow-pushing driving shaft 42, and a flow-pushing paddle 43. One end of the flow-pushing driving shaft 42 extends from the bottom of the tank body 1 into the tube and passes through the bottom of the heating chamber and is fixedly connected to the flow-pushing paddle 43. The flow-pushing driving assembly 41 is installed on the outer side of the bottom of the tank body 1 and is drivingly connected to the other end of the flow-pushing driving shaft 42. During operation, the flow-pushing direction of the forced circulation paddle 34 is downward, and the flow-pushing direction of the flow-pushing paddle 43 is upward. Such a design can apply a thrust to the sugar paste entering the upright heating tubes 22 and can accelerate the movement of the sugar paste in the upright heating tubes 22. In order to further limit the flow direction of the sugar paste, a circular baffle 23 extends downward along the vertical direction at the bottom of the slurry channel 21 to prevent the sugar paste from flowing toward the center of the bottom of the crystallization tank.

[0028] A number of flow guide plates 24 are arranged between the forced circulation paddle 34 and the bottom main shaft bearing bracket 33 in the slurry channel 21. The number of the flow guide plates 24 is vertically connected to the inner wall of the slurry channel 22, and the number of the flow guide plates 24 is distributed at equal angles around the circumference of the main shaft. The function of the flow guide plates 24 is to weaken the swirling vortex of the sugar paste above the forced circulation paddle 34, optimize the pressure distribution before and after the forced circulation paddle 34, and make the sugar paste move only downward.

[0029] The circulating drive assembly 31 includes a drive motor 311, a gear reducer 312, a top bearing 313 and a top bearing housing 314; the top bearing housing 314 is fixedly connected to the top of the tank body 1, the top bearing 313 is installed in the top bearing housing 314 and is coaxially arranged with the support bearing 35; the main shaft 32 is rotatably connected to the top bearing housing 314 through the top bearing 313; the gear reducer 312 is installed on the top of the top bearing housing 314, the drive motor 311 is installed on the gear reducer 312, and the output end of the drive motor 311 is drivingly connected to the input end of the gear reducer 312, and the output end of the gear reducer 312 is drivingly connected to the top of the main shaft 32. The support bearing 35 and the top bearing 313 jointly ensure the central verticality of the main shaft 32 and prevent the abnormal vibration of the main shaft 32 during rotation from aggravating the wear of the main shaft. To facilitate the installation of the main shaft 32, the main shaft 32 can be divided into three sections: upper, middle and lower. The upper and lower sections are solid shafts, and the middle section is a tube shaft. The tube shaft and the two solid shafts are directly connected by a coupling. Sealing rings 36 are provided at both ends of the support bearing 35 to prevent the sugar paste from entering the support bearing 35.

[0030] The structure of the flow-pushing drive assembly 41 can refer to that of the circulating drive assembly 31, and also includes a drive motor and a gear reducer installed at the bottom of the tank body 1. The drive motor is drivingly connected to the flow-pushing drive shaft through the gear reducer to drive the flow-pushing paddle 43 to rotate.

[0031] The utility model brings the sugar paste from above the evaporator into the lower part of the evaporator 2 through the central forced stirring mechanism 3. The sugar paste under the thrust is dispersed around along the bottom of the crystallization tank and enters the evaporator 2, and then flows back to the upper part of the evaporator 2 again. During the operation of the sugar paste, the bottom flow-pushing mechanism 4 is used to accelerate the flow rate of the sugar paste in the evaporator 2, reduce the flow of the sugar paste towards the center of the bottom of the crystallization tank, so that the sugar paste and the evaporator 2 can fully exchange heat, and the sugar paste in the upper and lower parts of the tank can be well circulated, thereby improving the sugar-boiling efficiency.

[0032] The above embodiments are only used to illustrate the technical solutions of the utility model and are not intended to limit it. Any modification or equivalent replacement that does not depart from the spirit and scope of the utility model shall be covered by the technical solutions of the utility model.

Claims

1. A forced circulation sugar crystallization tank stirrer, comprising a tank body, an evaporator and a forced circulation stirrer, wherein the evaporator is arranged inside the tank body, the part inside the tank body corresponding to the evaporator is a heating chamber, the center of the heating chamber is set as a slurry channel; a plurality of vertical heating pipes are arranged around the slurry channel, and a discharge port is arranged at the bottom of the tank body, characterized in that: The forced circulation agitator includes a central forced stirring mechanism and a plurality of bottom flow-pushing mechanisms; the central forced stirring mechanism includes a circulation drive assembly, a main shaft, a bottom main shaft bearing bracket and a forced circulation paddle; the main shaft extends into the tank from the top center of the tank body and passes into the slurry channel, the peripheral side of the bottom main shaft bearing bracket is fixedly connected to the top inner wall of the slurry channel, and the center of the bottom main shaft bearing bracket is rotationally connected to the main shaft through the bracket bearing; the forced circulation paddle is fixedly connected to the bottom of the main shaft and is located at the bottom of the slurry channel; the circulation drive assembly is installed on the top of the tank body and is transmission-connected to the top of the main shaft; a plurality of the bottom flow-pushing mechanisms are distributed between the heating chamber and the bottom of the tank body, and are used to push the sugar solution at the bottom of the tank body into the upright heating tube.

2. A forced circulation sugar crystallization tank agitator according to claim 1, characterized in that: The bottom plug-flow mechanism includes a plug-flow drive assembly, a plug-flow drive shaft and a plug-flow blade; one end of the plug-flow drive shaft extends from the bottom of the tank body into the tube and passes through the bottom of the heating chamber, and is fixedly connected to the plug-flow blade; the plug-flow drive assembly is installed on the outside of the bottom of the tank body and is transmission-connected to the other end of the plug-flow drive shaft.

3. A forced circulation sugar crystallization tank agitator according to claim 2, characterized in that: The pushing flow direction of the forced circulation blade is downward, and the pushing flow direction of the pushing flow blade is upward.

4. A forced circulation sugar crystallization tank agitator according to claim 3, characterized in that: An annular baffle plate extends downwardly from the bottom of the slurry channel in a vertical direction.

5. The forced circulation sugar crystallization tank agitator according to claim 1, characterized in that: A plurality of guide plates are arranged in the slurry channel between the forced circulation blades and the bottom main shaft bearing bracket, and the guide plates are vertically connected to the inner wall of the slurry channel, and the guide plates are distributed at equal angles around the main shaft.

6. A forced circulation sugar crystallization tank agitator according to claim 1, characterized in that: The circulating drive assembly includes a driving motor, a gear reducer, a top bearing and a top bearing seat; the top bearing seat is fixedly connected to the top of the tank body, the top bearing is installed in the top bearing seat and is coaxially arranged with the bracket bearing; the main shaft is rotationally connected to the top bearing seat through the top bearing; the gear reducer is installed on the top of the top bearing seat, the driving motor is installed on the gear reducer, and the output end of the driving motor is transmission-connected to the input end of the gear reducer, and the output end of the gear reducer is transmission-connected to the top of the main shaft.

7. A forced circulation sugar crystallization tank agitator according to claim 5, characterized in that: Both ends of the bracket bearing are provided with shaft seals.

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