Cooling crystallization equipment

Abstract

The utility model discloses cooling crystallization equipment, which belongs to the technical field of crystallization equipment in chemical industry and comprises a crystallization tank, a driving shaft and a fixing pipe, a tank cover is arranged on the crystallization tank, and a coil pipe for inputting cooling liquid is arranged on the outer surface of the crystallization tank; the driving shaft penetrates through the crystallizing tank and extends into the bottom of the crystallizing tank; scraping rods are arranged on the outer surface of the driving shaft at equal intervals; the fixed pipe is fixedly arranged on the outer surface of the driving shaft, a spiral blade is arranged on the fixed pipe, the driving shaft scrapes crystals on the inner wall of the tank body in the rotating process through the inclined surface of the scraping rod, the crystals are prevented from being attached, and the driving shaft synchronously drives the spiral blade to convey crystal particles out of the tank; the crystals can be conveniently taken out and subsequently treated, the crystals can be prevented from staying at the bottom of the tank for a long time, and uncrystallized liquid on the surfaces of the crystals flows into the tank again and continuously participates in the crystallization process by arranging the blades in the through holes, so that the utilization rate of raw materials is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to crystallization equipment technology field in chemical industry especially relates to a cooling crystallization equipment. BACKGROUND

[0002] Cooling crystallization equipment is a kind of equipment widely used in industrial production, it mainly passes through the temperature of material, makes material produce supersaturation, to promote material to crystallize.Cooling crystallization equipment can be divided into various types according to its structure and cooling mode, and the crystallizer of the type of agitator or external circulation kettle is widely used, and its cooling can be realized by the way of jacket heat exchange or through external heat exchanger.Cooling medium is commonly used ethylene, freon and other hydrocarbons inert liquid.

[0003] In the process of rapid cooling, the solute in the solution reaches supersaturation state rapidly and a large amount of crystals are precipitated, these crystals can be settled to the bottom of the container due to the collision and aggregation between each other, when crystallization is settled to the bottom, all the crystalline bodies can not be completely collected by simple pouring or pumping, especially the fine crystals attached to the bottom or corner of the container.This can lead to the decrease of crystallization collection efficiency, and affect the yield of product.The crystalline bodies settled to the bottom can be contaminated by impurities in the bottom of the container during long time standing, or the quality of crystals is uneven due to the difference of crystallization conditions in different parts.This can affect the purity and quality stability of the final product. SUMMARY

[0004] The utility model aims at providing a kind of cooling crystallization equipment to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of cooling crystallization equipment, comprising:

[0007] Crystallization tank, the tank cover is arranged on the crystallization tank, the outer surface of the crystallization tank is provided with the coil pipe for inputting cooling liquid;

[0008] Drive shaft, the drive shaft is through the crystallization tank and extends into tank bottom, the outer surface of the drive shaft is equidistantly provided with scraper rod;

[0009] Fixed pipe, the fixed pipe is fixedly arranged on the outer surface of drive shaft, the fixed pipe is provided with spiral blade.

[0010] Preferably, the drive shaft is provided with external drive, and the two sides of the scraper rod are inclined surfaces.

[0011] Preferably, the blade spirals from the tank bottom upwards, and a plurality of fine through holes are formed in the blade.

[0012] Preferably, the crystallization tank bottom is provided with a support, and the crystallization tank bottom is provided with a slagging port.

[0013] Preferably, the crystallization tank outer surface is provided with a feeding port near the support, and the feeding port is used for the crystallization liquid to enter the crystallization tank.

[0014] Preferably, the crystallization tank outer surface is provided with a discharging port near the tank cover, and the discharging port is used for the crystallization particles to discharge out of the tank.

[0015] Preferably, the discharging port is communicated with a connecting pipe one, and the connecting pipe one is communicated with a connecting pipe two on one side.

[0016] Preferably, the connecting pipe two is vertically arranged with the connecting pipe one.

[0017] Preferably, the connecting pipe two is sleeved on the outer surface of the driving shaft, and the inner wall of the connecting pipe two is attached to the blade.

[0018] Compared with the prior art, the utility model has the advantages of the following:

[0019] Through the inclined surface setting of the scraper rod, the crystallization on the inner wall of the tank body is scraped in the rotating process of the driving shaft, and the crystallization is avoided to be attached, the inclined surface can be attached to the shape of the tank wall, and larger scraping area and more suitable scraping angle are provided, so that the crystallization is ensured to be completely scraped, and the residual is reduced. Through the continuous scraping of the crystallization on the inner wall of the tank body, the inclined surface design significantly reduces the attachment rate of the crystallization on the tank wall.

[0020] Through the driving shaft synchronous belt driving spiral blade, the crystallization particles are transported out of the tank, the soft conveying mode of the spiral blade reduces the breaking phenomenon of the crystallization particles in the conveying process, and the integrity and quality of the product are helped to be maintained.

[0021] Through the blade setting in the through hole, the liquid not crystallized on the surface of the crystal reflows into the tank, and continues to participate in the crystallization process, so that the utilization rate of the raw material is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is a schematic diagram of the local section structure of the crystallization tank of the present application.

[0025] Figure 3 It is a schematic diagram of the local structure of the connecting pipe one and the connecting pipe two of the present application.

[0026] Figure 4 It is an exploded structure schematic diagram of the internal mechanism of the connecting pipe one and the connecting pipe two of the present application.

[0027] Figure number explanation: 1, crystallization tank; 2, tank cover; 3, support; 4, coil pipe; 5, feed inlet; 6, discharge outlet; 7, slag discharge port; 8, connecting pipe one; 9, connecting pipe two; 10, driving shaft; 11, scraper rod; 12, fixed pipe; 13, blade; 14, through hole. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the drawings.

[0029] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only used as examples, and other obvious modifications can be thought by those skilled in the art. The basic principles defined in the following description can be used in other embodiments, modifications, improvements, equivalent schemes and other technical schemes without departing from the spirit and scope of the present application.

[0030] Those skilled in the art should understand that in the disclosure of the present application, the orientations or positions indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relationship shown in the drawings, which is only for the convenience of the simplified description of the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0031] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number. Embodiments

[0032] Please refer to Figures 1-4 A cooling crystallization device, comprising: a crystallization tank 1 as the main container for the material to be cooled and crystallized, which can withstand the pressure and temperature changes generated by the material during the crystallization process. The tank cover 2 is provided on the crystallization tank 1, which is designed to be detachable, which is convenient for cleaning and maintenance of the device. At the same time, the tank cover 2 is also provided with an observation window, so as to observe the state of the material during the crystallization process. The outer surface of the crystallization tank 1 is provided with a coil 4 for inputting cooling liquid, which is used as an input channel for cooling liquid. By coiling on the outer surface of the crystallization tank 1, the cooling capacity in the cooling liquid is transmitted to the material in the crystallization tank 1, so as to realize the cooling and crystallization of the material;

[0033] A cooling crystallization device, further comprising: a drive shaft 10, the drive shaft 10 penetrates the crystallization tank 1 and extends into the tank bottom, and the drive shaft 10 is externally connected with an external drive. The outer surface of the drive shaft 10 is equally provided with a scraper rod 11, and the main function of the scraper rod 11 is to scrape off the crystals adhering to the tank wall, so as to prevent the accumulation and affect the progress of the crystallization process;

[0034] By inputting the cooling liquid through the coil 4, the temperature of the material in the crystallization tank 1 is reduced. With the reduction of the temperature of the material, its solubility gradually decreases, and when it reaches the supersaturation state, the material begins to precipitate crystals. The rotation of the drive shaft 10 drives the synchronous rotation of the scraper rod 11. The scraper rod 11 continuously scrapes off the crystals adhering to the tank wall during rotation, so as to prevent the accumulation and affect the crystallization efficiency and product quality.

[0035] A cooling crystallization device, further comprising: a fixed pipe 12, which is fixedly arranged on the outer surface of the drive shaft 10, and the fixed pipe 12 is provided with a spiral blade 13. The spiral blade 13 rotates the crystals at the bottom of the crystallization tank 1 to the middle of the tank body and discharges them. After the crystals reach a certain size or density, the rotation of the spiral blade 13 can also assist in conveying the crystals from the tank body to the discharge port, which is convenient for the removal and subsequent processing of the crystals. This helps to avoid the crystals staying in the tank bottom for a long time, reduce the adhesion and caking phenomenon between the crystals, and in addition, the continuous stirring and conveying action helps to reduce the adhesion and caking phenomenon between the crystals, and improves the quality of the crystals.

[0036] The two sides of the scraper rod 11 are designed as inclined surfaces. The design of the inclined surfaces enables the scraper rod 11 to more effectively scrape off the crystals attached to the tank wall during rotation. Due to the presence of the inclined surfaces, the contact area and contact angle of the scraper rod 11 with the tank wall are optimized, thereby improving the efficiency and effectiveness of scraping. By more effectively scraping the crystals on the tank wall, the inclined scraper rod 11 helps to maintain the flowability and uniformity of the material inside the crystallization tank 1. This helps to reduce temperature and concentration gradients, improving the uniformity and efficiency of crystallization.

[0037] Further, the blades 13 spiral upwards from the tank bottom, and a plurality of fine through holes 14 are provided through the blades 13. The provision of the through holes 14 promotes the return of uncrystallized liquid into the tank, thereby promoting the transport of crystals and the reflux of uncrystallized liquid, making the crystallization process more uniform and efficient. This helps to reduce the crystallization time, improve the production efficiency, and reduce the energy consumption. Uniform crystallization process helps to reduce the adhesion and caking phenomenon between crystals, improving the purity and quality of the crystals. At the same time, the sufficient reflux of uncrystallized liquid also reduces the occurrence of local supersaturation and reduces the generation rate of impurities.

[0038] The crystallization tank 1 is provided with a support 3 at the bottom. The main function of the support 3 is to support the weight of the entire crystallization tank 1, ensuring its stability and safety during operation. The crystallization tank 1 is provided with a slag discharge port 7 at the bottom. The slag discharge port 7 is provided at the bottom of the crystallization tank 1, and its main function is to discharge impurities, uncrystallized solid particles, and possible caking formed during the crystallization process. If these impurities are not discharged in time, they will affect the crystallization effect and product quality, and may even cause damage to the equipment.

[0039] Further, the crystallization tank 1 is provided with an inlet 5 near the support 3 on the outer surface. The inlet 5 is used for the crystallization liquid to enter the crystallization tank 1. The inlet 5 is provided on the outer surface of the crystallization tank 1 near the support 3, which facilitates the direct introduction of the crystallization liquid into the crystallization tank 1, while reducing the heat loss and pollution risk of the liquid during transportation. The crystallization tank 1 is provided with an outlet 6 near the tank cover 2 on the outer surface. The outlet 6 is used for the discharge of crystalline particles from the tank.

[0040] It should be noted that the outlet 6 is connected with a connecting pipe one 8, and the connecting pipe one 8 is connected with a connecting pipe two 9 on one side. The connecting pipe two 9 is vertically arranged with the connecting pipe one 8. The connecting pipe two 9 is sleeved on the outer surface of the driving shaft 10, and the inner wall of the connecting pipe two 9 is in close contact with the blade 13. The blade 13 on the outer surface of the fixed pipe 12 is continuously fed by the driving shaft 10, and the outlet pipe two serves as an auxiliary feeding pipe for the crystalline particles, facilitating the smoothness of feeding. The blade 13 is spirally arranged to extrude the material from the inlet pipe one into the inlet pipe one, and then discharge it from the outlet 6. This not only improves the transport efficiency of the crystalline particles, but also avoids the long-term standing of the particles at the bottom of the crystallization tank 1.

[0041] It has to be understood that, in the present text, relational terms such as first and second and the like can merely be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or even inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0042] It will be appreciated by persons skilled in the art that the present application is not limited to what has been particularly shown and described hereinabove. The present application is intended to cover any and all alternatives, modifications, variations, improvements and / or equivalents of the embodiments described hereinabove.

Claims

1. A cooling crystallization apparatus, characterized by, Include: Crystallization tank (1), the crystallization tank (1) is provided with tank cover (2), the crystallization tank (1) outer surface is provided with the coil pipe (4) for inputting cooling liquid; Driving shaft (10), the driving shaft (10) is through the crystallization tank (1) and extends into the tank bottom, the driving shaft (10) outer surface is provided with scraper rod (11) at equal intervals; Fixed tube (12), the fixed tube (12) is fixedly arranged on the outer surface of driving shaft (10), the fixed tube (12) is provided with spiral blade (13).

2. A cooling crystallization apparatus according to claim 1, characterized in that: The driving shaft (10) is circumscribed with external drive, and the both sides of the scraper rod (11) are inclined surfaces.

3. A cooling crystallization apparatus according to claim 2, characterized in that: The blade (13) is spirally upwards from the tank bottom, and a plurality of fine through holes (14) are formed in the blade (13).

4. A cooling crystallization apparatus according to claim 3, wherein: The crystallization tank (1) is provided with a support (3) at the bottom, and a slag discharge port (7) is arranged at the bottom of the crystallization tank (1).

5. A cooling crystallization apparatus according to claim 4, characterized in that: The crystallization tank (1) is provided with a feed inlet (5) near the support (3) on the outer surface, and the feed inlet (5) is used for the crystallization liquid to enter the crystallization tank (1).

6. A cooling crystallization apparatus according to claim 5, characterized in that: The crystallization tank (1) is provided with a discharge port (6) near the tank cover (2) on the outer surface, and the discharge port (6) is used for the crystallization particles to be discharged from the tank.

7. A cooling crystallization apparatus according to claim 6, characterized in that: The discharge port (6) is communicated with the connecting pipe one (8), and the connecting pipe two (9) is communicated on one side of the connecting pipe one (8).

8. A cooling crystallization apparatus according to claim 7, characterized in that: The connecting pipe two (9) is arranged perpendicularly to the connecting pipe one (8).

9. A cooling crystallization apparatus according to claim 8, characterized in that: The connecting pipe two (9) is sleeved on the outer surface of the driving shaft (10), and the inner wall of the connecting pipe two (9) is attached to the blade (13).

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