Stirring device of vertical crystallizer

Abstract

The utility model belongs to the technical field of crystallization devices, and discloses a stirring device of a vertical crystallizer, which comprises a frame component fixed at the top of a crystallization tank, a transmission shaft mounted in the frame component, a variable frequency driving component in transmission connection with the upper end of the transmission shaft, and a stirring shaft fixedly mounted at the lower end of the transmission shaft. The lower end of the stirring shaft is rotatably mounted on the bottom wall of the crystallizing tank, a double-helix coil pipe is mounted on the outer side of the stirring shaft, an anchor type stirring blade is arranged below the double-helix coil pipe, the double-helix coil pipe and the interior of the stirring shaft jointly form a cooling circulation system, and the cooling circulation system is communicated with a bidirectional rotating joint; according to the utility model, the structure that the double-layer coil pipe is matched with anchor type stirring is adopted, so that the crystallization process is accelerated, the problems of sedimentation and wall surface attachment of crystal substances are solved, and the crystallization rate and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to crystallization device technical field, especially is involved in a kind of stirring device of vertical crystallizer. BACKGROUND

[0002] Vertical crystallizer is a kind of crystallization equipment perpendicular to ground, its working principle is through cooling or adding chemical reagent, solute in solution material reaches supersaturation state, to form and gradually grow on crystallization nucleus, specific process is as follows: first, through heater, solution material is heated to certain temperature, to reach the thermodynamic condition required for crystallization, and in the process of heating, using agitator constantly stirs solution material, to ensure the uniform distribution of solute in solution material;When solution material reaches set temperature, cooler starts to work, solution material is rapidly cooled, in the cooling process, solute gradually reaches supersaturation state, begins to form crystal on crystallization nucleus;After that, with the continuation of cooling, crystal gradually grows, agitator continues to stir in this process, to control the size and shape of crystal.

[0003] In the Chinese patent application No. 201310523230.1, a vertical stirring crystallization tank is proposed. However, this patent has the following problems: first, the heat exchange contact area between the agitator and the solution material is small, which leads to slow crystallization process and affects the crystallization speed of the liquid material; second, the agitator cannot stir the bottom space of the tank, which causes the crystallization material to settle and adhere to the wall. UTILITY MODEL CONTENT

[0004] The main technical problem to be solved by the utility model is to provide a stirring device for vertical crystallizer, which adopts a structure of double-layer coil pipe and anchor-type stirring in cooperation, accelerates the crystallization process, solves the problems of settlement and wall adhesion of crystallization material, and improves the crystallization rate and production efficiency.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] The stirring device for vertical crystallizer includes a rack assembly fixed on the top of the crystallization tank, a transmission shaft is installed inside the rack assembly, the upper end of the transmission shaft is drivingly connected with a frequency conversion driving assembly, the lower end of the transmission shaft is fixedly installed with a stirring shaft, the lower end of the stirring shaft is rotatably installed on the bottom wall of the crystallization tank, a double-spiral coil pipe is installed on the outer side of the stirring shaft, an anchor-type stirring blade is arranged below the double-spiral coil pipe, the double-spiral coil pipe and the inside of the stirring shaft jointly constitute a cooling circulation system, and a bidirectional rotating joint is connected to the cooling circulation system.

[0007] The following is a further optimization of the above technical scheme by the utility model:

[0008] The frame assembly includes a fixed sleeve coaxially arranged with the drive shaft. The lower end of the fixed sleeve is fixedly installed on the top wall of the crystallizer via a mounting flange, and the frequency conversion drive assembly is installed on the upper end of the fixed sleeve.

[0009] Further optimization: The drive shaft is installed vertically through the inside of the fixed sleeve and the mounting flange. The upper end of the drive shaft extending out of the fixed sleeve is connected to the frequency conversion drive assembly, and the lower end of the drive shaft extending out of the fixed sleeve is fixedly connected to the stirring shaft through a fastener.

[0010] Further optimization: The variable frequency drive assembly includes a reducer fixedly installed on the upper end of the frame assembly. The output end of the reducer is connected to the drive shaft, and the input end of the reducer is connected to a variable frequency motor. The motor housing of the variable frequency motor is fixedly installed on the crystallization tank.

[0011] Further optimization: The cooling circulation system includes a central water pipe that runs through the inside of the drive shaft. The central water pipe has a first water inlet chamber and a first water return chamber. The first water inlet chamber is connected to the water inlet end of the bidirectional rotary joint, and the first water return chamber is connected to the water outlet end of the bidirectional rotary joint.

[0012] Further optimization: The stirring shaft is provided with a second water inlet chamber and a second water return chamber arranged vertically. The water outlet of the first water inlet chamber is connected to the water inlet of the second water inlet chamber, and the water inlet of the first water return chamber is connected to the water outlet of the second water return chamber.

[0013] Further optimization: The double spiral coil includes a first coil and a second coil arranged in a cross spiral configuration. The spiral direction of the first coil is opposite to that of the second coil. The water inlet ends of both the first and second coils are fixedly installed on the upper end of the stirring shaft, and the water outlet ends of both the first and second coils are fixed on the lower end of the stirring shaft. The second water inlet chamber is connected to the second water return chamber through the first and second coils.

[0014] Further optimization: Several stirring rods are fixed at staggered intervals on the side wall of the stirring shaft, and the stirring rods extend perpendicularly to the stirring shaft.

[0015] The present invention adopts the above technical solution and has the following beneficial effects:

[0016] 1. The present invention adopts the above-mentioned technical solution, which is ingenious in conception and reasonable in structure. It adopts a double-layer coil structure, in which the coolant circulates from top to bottom through the first coil and the second coil, which effectively increases the heat exchange contact area between the stirring device and the liquid material, thereby improving the cooling speed of the stirring device on the liquid material, thus accelerating the crystallization process of the liquid material and improving the efficiency of the crystallization work.

[0017] 2. The anchor-type stirring plate is set in the bottom space of the crystallization tank and fits against the bottom wall of the crystallization tank. It can not only cooperate with the double-layer coil structure to achieve efficient and thorough mixing of liquid materials, but also prevent the crystals from settling in the bottom space of the crystallization tank or even adhering to the inner wall of the crystallization tank, thereby effectively improving the crystallization rate of the material.

[0018] 3. The coolant circulates from top to bottom through the first and second coils, while ensuring that the stirring shaft is in a state of continuous rotation, thereby keeping the liquid material in a state of full mixing, ensuring the uniformity of crystallization temperature, and preventing the material from crystallizing on the outer surface of the first and second coils.

[0019] 4. The variable frequency motor can adjust the speed of the stirring shaft and the temperature of the coolant by frequency conversion, thereby controlling the particle size and morphology of crystal formation, thus improving the crystal quality and crystallization rate. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Schematic sectional view along the middle AA direction;

[0023] Figure 3 for Figure 1 Enlarged view of the structure at point B;

[0024] Figure 4 for Figure 1 Enlarged view of the structure at point C;

[0025] Figure 5 This is a schematic diagram of the installation of this utility model in a crystallization tank.

[0026] In the diagram: 1. Crystallization tank; 2. Frame assembly; 201. Fixing sleeve; 202. Mounting flange; 3. Drive shaft; 4. Reducer; 5. Stirring shaft; 6. Double spiral coil; 601. First coil; 602. Second coil; 7. Anchor-type stirring blade; 8. Cooling circulation system; 801. Central water pipe; 802. First water inlet chamber; 803. First water return chamber; 804. Second water inlet chamber; 805. Second water return chamber; 9. Bidirectional rotary joint; 10. Fixing component; 11. Stirring rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-5 As shown, the stirring device of the vertical crystallizer includes a frame assembly 2 fixed to the top of the crystallization tank 1.

[0029] In this embodiment, the entire stirring device is vertically installed inside the crystallization tank 1 via the frame assembly 2.

[0030] like Figure 1 and Figure 3 As shown, a drive shaft 3 is installed inside the frame assembly 2. A frequency converter drive assembly is connected to the upper end of the drive shaft 3, and a stirring shaft 5 is fixedly installed at the lower end of the drive shaft 3.

[0031] In this embodiment, the frequency conversion drive assembly is used to drive the transmission shaft 3 and the stirring shaft 5 to rotate continuously.

[0032] The lower end of the stirring shaft 5 is rotatably mounted on the bottom wall of the crystallization tank 1, and a double spiral coil 6 is installed on the outside of the stirring shaft 5.

[0033] Compared to the single-layer coil structure in traditional crystallizers, the double-helix coil 6 in this invention has a larger area, thereby increasing the heat exchange contact area with the liquid material, accelerating the cooling rate of the liquid material, and thus greatly accelerating the crystallization process of the liquid material.

[0034] An anchor-type stirring plate 7 is installed below the double helical coil 6.

[0035] In this embodiment, the anchor-type stirring plate 7 works in conjunction with the upper double spiral coil 6 to efficiently and thoroughly mix and stir the liquid material inside the crystallization tank 1, thereby preventing the crystals from settling and adhering to the wall surface, and thus avoiding waste caused by the settling or adhesion of the crystals.

[0036] The double spiral coil 6 and the stirring shaft 5 together form a cooling circulation system 8, which is connected to a bidirectional rotary joint 9.

[0037] In this embodiment, the bidirectional rotary joint 9 and the drive shaft 3 are rotatably connected.

[0038] In this embodiment, both the inlet and outlet of the bidirectional rotary joint 9 are connected to the cooler to cool the coolant to a suitable crystallization temperature.

[0039] In this embodiment, the frame assembly 2, the frequency conversion drive assembly, and the bidirectional rotary joint 9 are all located on the top of the crystallization tank 1, the lower end of the drive shaft 3 extends into the crystallization tank 1, and the stirring shaft 5, the double spiral coil 6, and the anchor-type stirring plate 7 are all located inside the crystallization tank 1.

[0040] The frame assembly 2 includes a fixed sleeve 201 coaxially arranged with the drive shaft 3. The lower end of the fixed sleeve 201 is fixedly installed on the top wall of the crystallizer 1 through the mounting flange 202, and the frequency conversion drive assembly is installed on the upper end of the fixed sleeve 201.

[0041] In this embodiment, the installation structure and positional relationship of the drive shaft 3 within the frame assembly 2 are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0042] Furthermore, the drive shaft 3 is installed vertically through the inside of the fixed sleeve 201 and the mounting flange 202. The upper end of the drive shaft 3 extending out of the fixed sleeve 201 is connected to the frequency converter drive assembly, and the lower end of the drive shaft 3 extending out of the fixed sleeve 201 is fixedly connected to the stirring shaft 5 through the fastener 10.

[0043] In this embodiment, the drive shaft 3 is rotatably mounted inside the fixed sleeve 201.

[0044] In this embodiment, the structure and connection principle of the fastener 10 constitute the prior art and are well known to those skilled in the art, and will not be described in detail here.

[0045] The variable frequency drive assembly includes a speed reducer (4) fixedly installed on the upper end of the frame assembly 2, and the output end of the speed reducer (4) is connected to the transmission shaft 3.

[0046] The input end of the reducer (4) is connected to a variable frequency motor (not shown in the figure), and the motor housing of the variable frequency motor is fixedly installed on the crystallizing tank 1.

[0047] In this embodiment, the connection and transmission principle between the reducer 4 and the variable frequency motor, as well as the structure and installation principle of the variable frequency motor, are all existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0048] In this embodiment, the rotational speed of the stirring shaft 5 and the temperature of the coolant are adjusted by a variable frequency motor to control the particle size and morphology of crystals formed in the liquid material.

[0049] like Figures 1-4As shown, the cooling circulation system 8 includes a central water pipe 801 that runs through the inside of the drive shaft 3. The central water pipe 801 has a first water inlet chamber 802 and a first water return chamber 803. The first water inlet chamber 802 is connected to the water inlet end of the bidirectional rotary joint 9, and the first water return chamber 803 is connected to the water outlet end of the bidirectional rotary joint 9.

[0050] In this embodiment, the central water pipe 801 is provided with a plurality of first water inlet chambers 802 arranged in a ring at equal intervals, and the first water inlet chambers 802 are located at the center of the first water inlet chambers 802.

[0051] Furthermore, the stirring shaft 5 is provided with a second water inlet chamber 804 and a second water return chamber 805 arranged vertically inside. The water outlet of the first water inlet chamber 802 is connected to the water inlet of the second water inlet chamber 804, and the water inlet of the first water return chamber 803 is connected to the water outlet of the second water return chamber 805.

[0052] like Figure 1 and Figure 5 As shown, the double spiral coil 6 includes a first coil 601 and a second coil 602 arranged in a cross spiral configuration. The spiral direction of the first coil 601 is opposite to that of the second coil 602. The water inlet ends of the first coil 601 and the second coil 602 are both fixedly installed on the upper end of the stirring shaft 5, and the water outlet ends of the first coil 601 and the second coil 602 are both fixed on the lower end of the stirring shaft 5. The second water inlet chamber 804 is connected to the second water return chamber 805 through the first coil 601 and the second coil 602.

[0053] like Figures 1-5 As shown, several stirring rods 11 are fixed at staggered intervals on the side wall of the stirring shaft 5, and the stirring rods 11 extend perpendicularly to the stirring shaft 5.

[0054] In this embodiment, one end of the stirring rod 11 is fixed to the stirring shaft 5, and the other end of the stirring rod 11 is fixedly connected to the corresponding first coil 601 or second coil 602.

[0055] like Figure 1 As shown, the arrows indicate the direction of coolant flow.

[0056] The method of using this utility model is as follows:

[0057] S1. According to the actual needs of the liquid material, the speed of the transmission shaft 3 and the stirring shaft 5 is adjusted by the frequency conversion motor and the reducer 4, and the stirring shaft 5 is driven to rotate continuously. The stirring shaft 5 drives the first coil 601, the second coil 602, the anchor stirring plate 7 and the stirring rod 11 to rotate continuously, stirring the liquid material in the crystallization tank 1, so that it is in a fully mixed state.

[0058] S2. Coolant enters the first water inlet chamber 802 inside the central water pipe 801 through the water inlet end of the bidirectional rotary joint 9, and then enters the second water inlet chamber 804 through the first water inlet chamber 802. The coolant in the second water inlet chamber 804 enters the first coil 601 and the second coil 602, and flows from top to bottom through the first coil 601 and the second coil 602, continuously exchanging heat with the liquid material in the crystallizer 1.

[0059] S3. The coolant flowing to the outlet end of the first coil 601 and the second coil 602 enters the second return water chamber 805 and is finally discharged from the crystallizer 1 through the outlet end of the first return water chamber 803 and the bidirectional rotary joint 9.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stirring device for a vertical crystallizer, comprising a frame assembly (2) fixed to the top of a crystallizing tank (1), characterized in that, The frame assembly (2) is equipped with a drive shaft (3), the upper end of the drive shaft (3) is connected to a frequency converter drive assembly, the lower end of the drive shaft (3) is fixedly installed with a stirring shaft (5), the lower end of the stirring shaft (5) is rotatably installed on the bottom wall of the crystallizer (1), a double spiral coil (6) is installed on the outside of the stirring shaft (5), and an anchor stirring plate (7) is provided below the double spiral coil (6). The double spiral coil (6) and the stirring shaft (5) together form a cooling circulation system (8), and the cooling circulation system (8) is connected to a bidirectional rotary joint (9).

2. The stirring device of the vertical crystallizer according to claim 1, characterized in that, The frame assembly (2) includes a fixed sleeve (201) coaxially arranged with the drive shaft (3). The lower end of the fixed sleeve (201) is fixedly installed on the top wall of the crystallizer (1) through the mounting flange (202). The frequency conversion drive assembly is installed on the upper end of the fixed sleeve (201).

3. The stirring device of the vertical crystallizer according to claim 2, characterized in that, The drive shaft (3) is installed vertically through the inside of the fixed sleeve (201) and the mounting flange (202). The upper end of the drive shaft (3) extending out of the fixed sleeve (201) is connected to the frequency conversion drive assembly. The lower end of the drive shaft (3) extending out of the fixed sleeve (201) is fixedly connected to the stirring shaft (5) through the fastener (10).

4. The stirring device of the vertical crystallizer according to claim 1, characterized in that, The variable frequency drive assembly includes a speed reducer (4) fixedly installed on the upper end of the frame assembly (2). The output end of the speed reducer (4) is connected to the transmission shaft (3). The input end of the speed reducer (4) is connected to a variable frequency motor. The motor housing of the variable frequency motor is fixedly installed on the crystallizing tank (1).

5. The stirring device for the vertical crystallizer according to claim 1, characterized in that, The cooling circulation system (8) includes a central water pipe (801) that runs through the inside of the drive shaft (3). The central water pipe (801) is provided with a first water inlet chamber (802) and a first water return chamber (803). The first water inlet chamber (802) is connected to the water inlet end of the bidirectional rotary joint (9), and the first water return chamber (803) is connected to the water outlet end of the bidirectional rotary joint (9).

6. The stirring device for the vertical crystallizer according to claim 5, characterized in that, The stirring shaft (5) is provided with a second water inlet chamber (804) and a second water return chamber (805) arranged vertically inside. The water outlet of the first water inlet chamber (802) is connected to the water inlet of the second water inlet chamber (804), and the water inlet of the first water return chamber (803) is connected to the water outlet of the second water return chamber (805).

7. The stirring device for the vertical crystallizer according to claim 6, characterized in that, The double spiral coil (6) includes a first coil (601) and a second coil (602) arranged in a cross spiral configuration. The spiral direction of the first coil (601) is opposite to that of the second coil (602). The water inlet ends of the first coil (601) and the second coil (602) are both fixedly installed on the upper end of the stirring shaft (5). The water outlet ends of the first coil (601) and the second coil (602) are both fixed on the lower end of the stirring shaft (5). The second water inlet chamber (804) is connected to the second water return chamber (805) through the first coil (601) and the second coil (602).

8. The stirring device for the vertical crystallizer according to claim 1, characterized in that, Several stirring rods (11) are fixed at staggered intervals on the side wall of the stirring shaft (5), and the stirring rods (11) extend perpendicularly to the stirring shaft (5).

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