High-temperature crystallization tower

Abstract

The utility model belongs to the technical field of evaporative crystallization equipment, and relates to a high-temperature crystallization tower which comprises a crystallization tower main body, a crystallization pipe, a solution spraying area and a material screening device, a crystallization pipe, a solution spraying area, a material screening device and a mixing and returning area are sequentially arranged in the crystallization tower main body from top to bottom, the mixing and returning area is communicated with the solution spraying area, and a discharging opening of the material screening device abuts against the material plate vibration piece. According to the utility model, through the multilayer arrangement of the crystallization pipes and the vertical layered layout of the solution spraying area, the staged temperature control in the decomposition reaction process is realized, and the generation of tiny crystal nucleuses is reduced through atomization crystallization; the material screening device is matched with the material plate vibration piece, crystallization products can be dynamically screened, fine particles which do not reach the standard participate in crystallization circulation again through the mixing and returning area, and the crystallization integrity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporative crystallization equipment technical field especially relates to a high temperature crystallization tower. BACKGROUND

[0002] In industry, when preparing zirconium oxide, zirconium oxychloride is an important intermediate product, zirconium ore is reacted with carbon at high temperature to generate zirconium carbide, then the zirconium carbide is reacted with chlorine to obtain zirconium tetrachloride, the zirconium tetrachloride is hydrolyzed to obtain zirconium oxychloride solution, and finally the zirconium oxychloride solution is decomposed at high temperature to obtain zirconium oxide.

[0003] The conventional crystallization equipment is difficult to meet the strict requirements of different crystallization stages on temperature in crystallization, and temperature fluctuation will lead to unstable crystallization rate, thereby affecting the morphology and particle size distribution of the crystallization product, the zirconium oxychloride solution is not completely decomposed, a large number of small crystal nuclei are formed, the particle size of the crystallization product collected is small and uneven, the difficulty of subsequent separation and purification is increased, and the purity and quality of the product are reduced. SUMMARY

[0004] In order to solve the technical problem that the existing zirconium oxychloride solution is not completely decomposed, leading to uneven aggregate, the utility model provides a high temperature crystallization tower.

[0005] The technical scheme of the utility model is realized through the following scheme: a high temperature crystallization tower, including crystallization tower main part, crystallization pipe, solution spray area and material screening device, the top end of the crystallization tower main part is equipped with steam exhaust port, one end of the crystallization tower main part near the steam exhaust port is equipped with dry type electric dust collector, the crystallization pipe, solution spray area, material screening device and mixed back feeding area are sequentially arranged in the crystallization tower main part from top to bottom, the mixed back feeding area is communicated with the solution spray area, and the material screening device discharge port is abutted on the material plate vibration part.

[0006] Through the above technical scheme, the multi-layer setting of the crystallization pipe and the vertical layered layout of the solution spray area realize the stage temperature control of the decomposition reaction process, and the small crystal nucleus generation is reduced through atomization crystallization; the material screening device cooperates with the material plate vibration part, can dynamically screen the crystallization product, the small particles that do not meet the standard are re-participated in the crystallization cycle through the mixed back feeding area, and the crystallization completeness is improved.

[0007] As preferred, the material screening device includes a sieve plate, a limiting sliding block and a protective buffer assembly, the sieve plate is movably installed in the crystallization tower main part through the limiting sliding block and the protective buffer assembly, the limiting sliding block is fixedly installed on the top surface of the sieve plate, and the protective buffer assembly is fixedly installed on the bottom surface of the sieve plate.

[0008] As preferred, the crystallization tower body is provided with a sliding groove matched with the limiting sliding block, and the limiting sliding block is C-shaped, and the opening of the limiting sliding block is directed to the outlet side of the screening plate, and the screening plate is provided with a filter screen located in the C-shaped space formed by the limiting sliding block.

[0009] As preferred, the protective buffering assembly comprises a labyrinth height difference blocking plate and a plurality of buffering springs, one end of the buffering spring is fixedly installed in the installation slot, the other end of the buffering spring abuts against the labyrinth height difference blocking plate, the labyrinth height difference blocking plate is slidingly installed in the installation slot, and the labyrinth height difference blocking plate is fixedly installed on the bottom surface of the screening plate.

[0010] Through the above technical scheme, the limiting sliding block is matched with the sliding groove on the crystallization tower body, which not only limits the movement range of the screening plate and guarantees the stability of the screening plate, but also enables the filter screen to better receive and disperse the materials in the screening process, thereby avoiding damage to the filter screen or poor screening effect caused by direct impact of the materials on the filter screen; the labyrinth height difference blocking plate cooperates with the plurality of buffering springs to form an effective buffering and protection mechanism below the screening plate, and the labyrinth height difference blocking plate can completely block the exosmosis of the materials through the special height difference design, thereby prolonging the service life of the equipment.

[0011] As preferred, the mixing and return zone is provided with a stirring fan, one side of the bottom of the mixing and return zone is provided with a liquid outlet, and the liquid outlet is communicated with the solution spraying zone through a magnetic drive pump.

[0012] As preferred, the material plate vibration member comprises a driving motor and a cam, the output end of the driving motor is provided with the cam, the driving motor is installed below the outlet side of the material screening device, and the cam abuts against the material screening device.

[0013] As preferred, the solution spraying zone is communicated with a solution input main pipe, and the crystallization pipe is respectively communicated with a hot gas input pipe and a hot gas output pipe.

[0014] Through the above technical scheme, the stirring fan breaks the agglomeration between the particles to make the undersized particles and the solution fully mixed again, thereby improving the uniformity and consistency of the returned materials, so that qualified crystallization products are formed in the next crystallization cycle; the periodic rotation of the cam can generate stable vibration effect, so that the screening plate in the material screening device can continuously and effectively perform the screening work, the materials can pass through the screen holes better, the materials are prevented from being blocked in the screen holes, and the screening efficiency and the screening quality are improved.

[0015] In summary, the present application has the following beneficial effects:

[0016] 1. The utility model discloses a vertical layered layout of the multi-layered setting of the crystallization tube and the solution spraying area, realizes the stage temperature control of the decomposition reaction process, and reduces the tiny crystal nucleus formation through atomization crystallization, material screening device cooperation material board vibration piece can carry out dynamic screening to the crystallization product, and the undersized particle that does not reach the standard participates in the crystallization circulation through the mixed back feeding area again, improves the crystallization integrity.

[0017] 2. The limiting sliding block is matched with the sliding groove on the crystallization tower main body, not only limits the moving range of the screening plate, guarantees its stability, but also makes the filter screen better undertake and disperse the material in the screening process, avoids the filter screen damage or the poor screening effect caused by the direct impact of the material on the filter screen, the labyrinth type height difference resistance material plate forms effective buffering and protection mechanism under the screening plate, and the labyrinth type height difference resistance material plate can also completely block the exosmosis of the material through the special height difference design, prolongs the service life of the equipment.

[0018] 3. The undersized particle that does not reach the standard is mixed with solution again through the stirring fan and breaks the agglomeration between particles, improves the uniformity and consistency of back feeding material, thereby forming qualified crystallization product in the next crystallization cycle, the periodic rotation of the cam can produce stable vibration effect, makes the screening plate in the material screening device can continuously and effectively carry out screening work, helps the material to pass through the sieve hole better, prevents the material from being blocked in the sieve hole, improves the screening efficiency and screening quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front view structure schematic drawing of the utility model;

[0020] Figure 2 It is the internal section structure schematic drawing of the utility model;

[0021] Figure 3 It is the internal section structure schematic drawing of the utility model;

[0022] Figure 4 It is the material screening device assembly structure schematic drawing of the utility model;

[0023] Figure 5 It is the sieve plate three-dimensional structure schematic drawing of the utility model;

[0024] Figure 6 It is Figure 3 The A place enlarged structure schematic drawing of;

[0025] Figure 7 It is Figure 4 The B place enlarged structure schematic drawing of;

[0026] Mark explanation: 1, crystallization tower main body; 2, crystallization tube; 3, solution spraying area;

[0027] 4. Material screening device; 41. Screen plate; 42. Limiting slider; 43. Protective buffer assembly; 431. Labyrinth-type height difference resisting plate; 432. Buffer spring;

[0028] 5. Vibrating plate component; 51. Drive motor; 52. Cam; 6. Agitator fan; 7. Magnetic drive pump; 8. Dry electrostatic precipitator; 9. Steam exhaust port. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] A high-temperature crystallization tower, such as Figures 1-7 As shown, the system includes a crystallization tower body 1, a crystallization tube 2, a solution spray zone 3, and a material screening device 4. The top of the crystallization tower body 1 has a steam outlet 9, and a dry electrostatic precipitator 8 is located at one end of the crystallization tower body 1 near the steam outlet 9. Inside the crystallization tower body 1, from top to bottom, are the crystallization tube 2, the solution spray zone 3, the material screening device 4, and a mixing and return zone. The mixing and return zone is connected to the solution spray zone 3. The outlet of the material screening device 4 abuts against the vibrating material plate 5. The entire crystallization tower is divided into five main zones from top to bottom: a steam cleaning zone, a crystallization zone, a spray zone, a screening zone, and a mixing and return zone. The steam cleaning zone is controlled by the dry electrostatic precipitator 8. The gas after the purification solution evaporates is made to meet the emission standards. The solution spray zone 3 is connected to the solution input main pipe, and the crystallization tube 2 is connected to the hot gas input pipe and the hot gas output pipe respectively. The hot gas can be the hot waste gas in the factory production process to make full use of the heat energy resources. The solution spray zone 3 uses silicon carbide (SiC) nozzles, which are pointed towards the crystallization tube 2 to atomize the zirconium oxychloride solution and spray it evenly onto the surface of the crystallization tube 2 to accelerate the crystallization process. The zirconium oxychloride solution that is not completely crystallized and decomposed will be screened out by the material screening device 4 in the screening zone and finally sink into the mixing and return zone for re-spraying crystallization to achieve cyclic crystallization and improve the crystal purity.

[0032] like Figure 2 , Figure 3As shown, the crystallization zone is located below the dry electrostatic precipitator 8 to above the solution spray zone 3, the material screening device 4 discharge port cooperates with the material plate vibrator 5 to ensure that the uncrystallized solution is separated from the solid crystals in time, maintain the smoothness of the screening area, prevent clogging, the crystallization tube 2 is composed of multiple circular rings, providing a larger surface area, the end close to the spray head is a hot gas input pipe, at this time the bottom of the crystallization tube 2 is the hottest, forming a temperature gradient, and vortexes are formed between the circular rings, enhancing the heat transfer efficiency, improving the uniformity of crystallization, and promoting the crystallization of the solution.

[0033] As shown in Figure 4 , the material screening device 4 includes a screening plate 41, a limiting slide block 42, and a protective buffer assembly 43, the screening plate 41 is movably installed in the crystallization tower main body 1 through the limiting slide block 42 and the protective buffer assembly 43, the limiting slide block 42 is fixedly installed on the top surface of the screening plate 41, and the protective buffer assembly 43 is fixedly installed on the bottom surface of the screening plate 41, the material screening device 4 is located in the square mounting block of the crystallization tower main body 1, the screening plate 41 is inclined, the square mounting block is provided with an inclined mounting hole, the gravity is utilized to promote the flow of the crystallized material, the screening plate 41 and the limiting slide block 42 are integrally arranged, and the screening plate 41 moves in the square mounting block of the crystallization tower main body 1 through the limiting slide block 42 on the upper surface and the labyrinth height difference resistance plate 431 on the lower surface.

[0034] As shown in Figure 5 , Figure 6 and Figure 7 , the crystallization tower main body 1 is provided with a sliding groove matched with the limiting slide block 42, and the crystallization tower main body 1 is provided with an installation groove matched with the protective buffer assembly 43, the sliding groove and the installation groove are slightly larger than the labyrinth height difference resistance plate 431 of the limiting slide block 42 and the protective buffer assembly 43, a shaking difference (about 1-2 mm) is provided, the screening plate 41 shakes and screens and discharges under the assistance of the material plate vibrator 5, the limiting slide block 42 is in a C shape, the opening of the limiting slide block 42 faces the outlet side of the screening plate 41, the screening plate 41 is provided with a filter screen, the filter screen is located in the C-shaped space formed by the limiting slide block 42, the uncrystallized solution and the small crystals that are not completely decomposed are filtered and screened through the filter screen, the c-shaped semi-closed space also effectively prevents the infiltration of the material, ensures that the material does not escape from the screening area of the screening plate 41, and moves to the outlet side.

[0035] As shown in Figure 4 and Figure 6As shown, the protective buffer assembly 43 includes a labyrinth height difference blocking plate 431 and a plurality of buffer springs 432. One end of the buffer spring 432 is fixedly installed in the installation slot, the other end of the buffer spring 432 abuts against the labyrinth height difference blocking plate 431, the labyrinth height difference blocking plate 431 is slidably installed in the installation slot, the labyrinth height difference blocking plate 431 is fixedly installed on the bottom surface of the screening plate 41, the labyrinth height difference blocking plate 431 is in the shape of an n-type (cross-sectional) circular ring, one leg of the n-type labyrinth height difference blocking plate 431 is installed in the installation slot, and the other leg is suspended inside the crystallization tower main body 1, which is covered with the installation slot to form a labyrinth and a sealing path with a height difference, prolong the solution permeation path, and reduce the risk of leakage. A plurality of buffer springs 432 are provided in the installation slot to prevent the screening plate 41 from colliding violently due to back and forth vibration, evenly distribute the impact force, prevent local overload, and effectively prevent the infiltration of the solution, thereby improving the service life and ensuring that the material enters the mixing and recycling area.

[0036] The mixing and recycling area is provided with a stirring fan 6, one side of the bottom of the mixing and recycling area is provided with a liquid outlet, the liquid outlet is connected to the solution spraying area 3 through a magnetic drive pump 7, and fine crystals are re-dissolved in the zirconium oxychloride solution for re-crystallization to avoid local concentration saturation. By using a recycling mechanism, substandard crystals are re-dissolved and induced to undergo secondary crystallization, thereby improving the uniformity of crystal particle size. The liquid outlet cooperates with the agitation of the stirring fan 6 to increase the fluidity of the liquid, which facilitates complete liquid discharge and reduces residue.

[0037] The material plate vibration member 5 includes a driving motor 51 and a cam 52. The cam 52 is installed on the output end of the driving motor 51. The driving motor 51 is installed below the outlet side of the material screening device 4. The cam 52 abuts against the material screening device 4. The cam 52 can generate periodic force changes during rotation, which transmits power to the screening device. Due to the constantly changing force at the contact point between the cam 52 and the material screening device 4, the screening device receives periodic impact forces, causing the material screening device 4 to vibrate, thereby facilitating the screening and separation of the material.

[0038] Working principle: The factory hot waste gas is connected to the crystallization pipe 2 for heating, and the further zirconium oxychloride solution is connected to the solution spraying area 3 for atomization and spraying for crystallization. The evaporated hot gas is purified by a dry electrostatic precipitator 8 and discharged at the steam discharge outlet 9. The crystallized material falls into the screening plate 41, which is stressed and vibrates with the material plate vibration member 5. At this time, fine particles and uncrystallized solution pass through the filter screen into the mixing and recycling area. The completely decomposed crystalline particles slide out of the outlet side with the vibration of the screening plate 41 and are collected.

[0039] The mixing and recycling area is stirred and re-mixed by the stirring fan 6, and the magnetic drive pump 7 at the liquid outlet drives the solution to be sprayed into the solution spraying area 3 for secondary crystallization, thereby improving the purity of the product.

[0040] The parts and devices are of conventional types, and the connections are of conventional types, and are not described in detail herein, and the contents not described in detail herein are the prior art known to the person skilled in the art.

[0041] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change, etc. made to the above embodiments according to the technical essence of the present application still falls within the protection scope of the present application.

Claims

1. A high temperature crystallization column characterized by: Including crystallization tower main body (1), crystallization tube (2), solution spray area (3) and material screening device (4), the top of the crystallization tower main body (1) is provided with a steam exhaust (9), the one end of the crystallization tower main body (1) is provided with a dry type electric dust collector (8) near the steam exhaust (9), the crystallization tower main body (1) is sequentially provided with the crystallization tube (2), the solution spray area (3), the material screening device (4) and the mixed back feeding area from top to bottom, the mixed back feeding area is communicated with the solution spray area (3), and the discharge port of the material screening device (4) is abutted on the material plate vibrating element (5).

2. The high temperature crystallization column of claim 1, wherein: The material screening device (4) includes a sieve plate (41), a limiting sliding block (42) and a protection buffer assembly (43), the sieve plate (41) is movably installed in the crystallization tower main body (1) through the limiting sliding block (42) and the protection buffer assembly (43), the top surface of the sieve plate (41) is fixedly installed with the limiting sliding block (42), and the bottom surface of the sieve plate (41) is fixedly installed with the protection buffer assembly (43).

3. The high temperature crystallization column of claim 2, wherein: A sliding groove matched with the limiting sliding block (42) is formed in the crystallization tower main body (1), an installation groove matched with the protection buffer assembly (43) is formed in the crystallization tower main body (1), the limiting sliding block (42) is C-shaped, the opening of the limiting sliding block (42) faces the outlet side of the sieve plate (41), a filter screen is arranged on the sieve plate (41), and the filter screen is located in the C-shaped space formed by the limiting sliding block (42).

4. The high temperature crystallization column of claim 3, wherein: The protection buffer assembly (43) includes a labyrinth type height difference resistance material plate (431) and a plurality of buffer springs (432), one end of the buffer spring (432) is fixedly installed in the installation groove, the other end of the buffer spring (432) is abutted against the labyrinth type height difference resistance material plate (431), the labyrinth type height difference resistance material plate (431) is slidably installed in the installation groove, and the labyrinth type height difference resistance material plate (431) is fixedly installed on the bottom surface of the sieve plate (41).

5. The high temperature crystallization column of claim 1, wherein: A stirring fan (6) is arranged in the mixed back feeding area, one side of the bottom of the mixed back feeding area is provided with a liquid outlet, and the liquid outlet is communicated with the solution spray area (3) through a magnetic drive pump (7).

6. The high temperature crystallization column of claim 1, wherein: The material plate vibrating element (5) includes a driving motor (51) and a cam (52), the output end of the driving motor (51) is provided with the cam (52), the driving motor (51) is installed below the outlet side of the material screening device (4), and the cam (52) is abutted against the material screening device (4).

7. The high temperature crystallization column of claim 1, wherein: The solution spray area (3) is communicated with a solution input main pipe, and the crystallization tube (2) is respectively communicated with a hot gas input pipe and a hot gas output pipe.

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