Crystallization apparatus for phenylalanine production

Abstract

The utility model provides a kind of crystallization device for phenylalanine production, include heating tank and condensing tank, heating tank outer periphery is provided heating assembly, for heating material and evaporating part moisture, make the material concentration of entering condensing tank be higher, beneficial to crystallization. Condensing tank bottom is set to hemispherical, arc-shaped bottom scraper is equipped in the lower end of stirring shaft, when descending to bottom, can adhere and scrape bottom inner wall, prevent crystal deposition, ensure that material is discharged smoothly. The top scraper, middle scraper and third scraper of the outer periphery of stirring shaft are set to height-adjustable by cooperating with lifting assembly, and the side wall of condensing tank is scraped, to avoid crystal accumulation, improve cooling efficiency. At the same time, the direction of first helical blade and second helical blade in condensing tank is opposite, can form up and down circulation flow when stirring, so that material is uniformly cooled and promotes crystal uniform precipitation. The device can effectively avoid crystallization in bottom and side wall accumulation, improve crystallization efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of phenylalanine production equipment, specifically a crystallization device for phenylalanine production. Background Technology

[0002] Phenylalanine is an important amino acid widely used in food, medicine, and other fields. In the production of phenylalanine, the crystallization process is a crucial step for product purification and extraction. Existing crystallization equipment typically includes a heating tank and a condensing tank. The heating tank is mainly used to heat and evaporate the reaction solution, allowing some of the water to evaporate, thus increasing the concentration of the material entering the condensing tank, which facilitates subsequent cooling and crystallization.

[0003] However, in existing crystallization devices, as the material temperature decreases and crystals gradually precipitate during the crystallization process in the condenser, crystals tend to deposit or adhere to the inner wall of the tank, especially the bottom, leading to reduced crystallization efficiency and even affecting material discharge. Traditional stirring structures struggle to effectively scrape the bottom of the condenser, resulting in crystal accumulation and cleaning difficulties. Secondly, while some devices incorporate scrapers inside the condenser, their height is often set very high—the same as or slightly less than the condenser's height—to ensure greater coverage of the inner wall. This can cause excessive interference between the scraper and the tank's sidewalls or bottom, increasing the power required for the stirring motor. Therefore, this paper proposes a crystallization device for phenylalanine production that prevents crystal accumulation on the tank's sidewalls and bottom while simultaneously improving crystallization efficiency and product quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a crystallization apparatus for phenylalanine production, which effectively improves problems such as crystal adhesion on the inner wall of some traditional crystallization apparatuses.

[0005] A crystallization apparatus for phenylalanine production includes a heating tank and a condensing tank. The heating tank has a heating element around its outer periphery, a first inlet, an outlet, and a first stirring motor at its top. The output of the first stirring motor is connected to a first stirring element located inside the heating tank. A first outlet is located on the bottom side of the heating tank, and a first solenoid valve is installed at the first outlet. The condensing tank is cylindrical in shape with a hemispherical bottom, and a cooling element is located on its outer periphery. A second outlet is located at the center of the bottom of the condensing tank, and a second inlet connected to the first outlet is located at the top of the condensing tank. A liquid outlet connected to the heating tank is located on the lower middle side of the condensing tank. A lifting assembly parallel to the height of the condenser is provided on the side. The output end of the lifting assembly is connected to a mounting base perpendicular to the lifting assembly. The mounting base is located above the condenser. A second stirring motor is installed at the bottom of the mounting base. A stirring shaft is provided at the output end of the second stirring motor. The stirring shaft passes through a rotating seat located at the top center of the condenser and is located inside the condenser. The outer periphery of the stirring shaft is provided with a top scraper, a first spiral blade, a middle scraper, a second spiral blade, a third scraper, and a bottom scraper from top to bottom. The spiral directions of the first spiral blade and the second spiral blade are opposite. The bottom scraper includes a connecting rod connected to the stirring shaft and an arc-shaped scraper located at the end of the connecting rod.

[0006] Preferably, the heating component is a heating tube or heating wire arranged in a spiral shape around the heating tank.

[0007] Preferably, the cooling assembly includes a first heat exchange coil and a second heat exchange coil arranged in a spiral shape around the condenser. Both the first and second heat exchange coils include a cooling medium inlet and a cooling medium outlet, and the cooling medium inlet and outlet of the first and second heat exchange coils are arranged in opposite directions.

[0008] Preferably, both the heating tank and the condensing tank are equipped with temperature sensors.

[0009] Preferably, the pitch of the first helical blade is greater than the pitch of the second helical blade.

[0010] Preferably, the first stirring assembly includes a stirring rod and a third spiral blade, a fourth stirring blade, and a fifth spiral blade arranged sequentially from top to bottom on the stirring rod. The spiral directions of the third spiral blade and the fifth spiral blade are opposite, and the fourth stirring blade is perpendicular to the stirring rod.

[0011] Preferably, the lifting assembly is a cylinder lifting assembly, a hydraulic rod lifting assembly, or a screw lifting assembly.

[0012] Preferably, the top scraper, the middle scraper, and the third scraper are all connected to the stirring shaft via a connecting rod.

[0013] Preferably, the top scraper, the middle scraper, the third scraper, and the arc-shaped scraper are configured as flexible parts on the side away from the stirring shaft.

[0014] Preferably, the crystallization apparatus for phenylalanine production also includes a PLC processor and a touch screen connected to the PLC processor.

[0015] Preferably, the liquid outlet is connected to the heating tank via a pipe, a suction pump is installed on the pipe, and a solenoid valve is installed at the liquid outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a crystallization apparatus for phenylalanine production, comprising a heating tank and a condensing tank. A heating element is installed around the outer periphery of the heating tank to heat the material inside, causing some moisture to evaporate. This results in a higher concentration of material entering the condensing tank, which facilitates crystallization. The bottom of the condensing tank has a hemispherical structure, and a bottom scraper with an arc-shaped scraper is installed at the lower end of the stirring shaft. When the stirring shaft descends, the bottom scraper adheres to the hemispherical inner wall of the condensing tank, and is rotated by a second stirring motor to scrape the hemispherical inner wall at the bottom of the condensing tank, effectively preventing crystal deposition or adhesion at the bottom and ensuring smooth material discharge. Simultaneously, a top scraper, a middle scraper, and a third scraper are sequentially arranged around the outer periphery of the stirring shaft, working in conjunction with a lifting component to adjust their height and scrape the side walls of the condensing tank. This prevents crystal accumulation at different heights within the tank, avoids the impact of crystals adhering to the inner wall on cooling efficiency, and thus improves the uniformity of crystallization. Furthermore, the first and second helical blades on the stirring shaft have opposite spiral directions, creating opposing flow trends during stirring. This ensures thorough circulation of the material within the condenser, further enhancing the stirring effect, resulting in more uniform cooling and promoting the uniform precipitation of crystal particles. Therefore, this invention effectively prevents the accumulation of crystals at the bottom and side walls of the tank, and also improves crystallization efficiency and product quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the crystallization apparatus for phenylalanine production according to the present invention; in: 20-Heating tank, 30-Condensing tank, 11-First feed inlet, 12-Exhaust port, 13-First stirring motor, 14-Stirring rod, 15-Third spiral blade, 16-Fourth stirring blade, 17-Fifth spiral blade, 18-First discharge port, 21-Cooling component, 22-Second discharge port, 23-Second feed inlet, 24-Liquid outlet, 25-Lifting component, 26-Mounting base, 27-Second stirring motor, 28-Stirring shaft, 29-Rotating base, 31-Top scraper, 32-First spiral blade, 33-Middle scraper, 34-Second spiral blade, 35-Third scraper, 36-Bottom scraper, 37-Connecting rod, 38-Connecting rod. Detailed Implementation

[0018] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0019] See Figure 1 This embodiment provides a crystallization apparatus for the production of phenylalanine, which includes a heating tank 10 and a condensing tank 20.

[0020] Specifically, a heating assembly 30 is provided on the outer periphery of the heating tank 10. A first inlet 11, an outlet 12, and a first stirring motor 13 are provided on the top of the heating tank 10. The output end of the first stirring motor 13 is connected to a first stirring assembly disposed within the heating tank 10. A first outlet 18 is provided on the bottom side of the heating tank 10, and a first solenoid valve is provided at the outlet. The first stirring assembly includes a stirring rod 14 and a third spiral blade 15, a fourth stirring blade 16, and a fifth spiral blade 17 arranged sequentially from top to bottom on the stirring rod 14. The spiral directions of the third spiral blade 15 and the fifth spiral blade 17 are opposite, and the fourth stirring blade 16 is perpendicular to the stirring rod 14. The heating assembly 30 is a heating tube or heating wire arranged spirally around the heating tank 10.

[0021] It should be noted that the heating tank 10 is used to heat the raw materials entering it. Through the heating effect of the heating component 30, the temperature of the material inside the heating tank 10 gradually increases, thereby promoting the evaporation of some of the moisture and increasing the concentration of the material. This process creates suitable concentration conditions for the material subsequently entering the condenser 20, preventing the crystallization effect from being affected by excessive moisture content. Simultaneously, the third and fifth helical blades 15 and 17 of the first stirring component, due to their opposite helical directions, can create opposite flow directions for the upper and lower parts of the solution, respectively. Combined with the vertical fourth stirring blade 16 in the middle, this generates a strong tumbling, shearing, and mixing effect, thereby promoting uniform heating of the material and improving heating efficiency.

[0022] Specifically, the condenser 20 is a cylindrical condenser with a hemispherical bottom. A cooling assembly 21 is arranged around its outer periphery. A second discharge port 22 is located at the center of the bottom of the condenser 20. A second inlet 23, connected to the first discharge port 18, is located at the top of the condenser 20. A liquid outlet 24, connected to the heating tank 10, is located on the lower side of the condenser 20. A lifting assembly 25, parallel to the height of the condenser 20, is located on the side of the condenser 20. A mounting base 26, perpendicular to the lifting assembly 25, is connected to the output end of the lifting assembly 25. The mounting base 26 is located above the condenser 20. A second stirring motor 27 is installed at the bottom of the mounting base 26. A stirring shaft 28 is provided at the output end of the second stirring motor 27. The stirring shaft 28 passes through a rotating seat 29 located at the top center of the condenser 20 and is located inside the condenser 20. The outer periphery of the stirring shaft 28 is provided with a top scraper 31, a first spiral blade 32, a middle scraper 33, a second spiral blade 34, a third scraper 35, and a bottom scraper 36 from top to bottom. The spiral directions of the first spiral blade 32 and the second spiral blade 34 are opposite. The bottom scraper 36 includes a connecting rod 37 connected to the stirring shaft 28 and an arc-shaped scraper located at the end of the connecting rod 37.

[0023] It should be noted that the condenser 20 is used to cool and crystallize high-concentration materials discharged from the heating tank 10. The cooling assembly 21 lowers the temperature of the material inside the tank, causing the solute in the material to gradually precipitate as crystals. The lifting assembly 25 can drive the stirring shaft 28 and the top scraper 31, the third scraper 35 and the bottom scraper 36 to rise and fall as a whole. When the stirring shaft 28 is lowered to the lowest position, the bottom arc-shaped scraper can fit against the inner wall of the hemispherical bottom to effectively scrape off the bottom crystals and prevent crystal deposition or blockage of the discharge port. When it is raised, the bottom scraper 36 will maintain a gap with the inner wall of the bottom to reduce interference. At the same time, the lifting assembly will also drive the top scraper 31, the middle scraper 33 and the third scraper 35 to scrape the side walls of the tank at different heights to ensure that the side walls are cleaned, prevent crystals from accumulating on the side walls, and ensure cooling efficiency and crystallization uniformity. It should be noted that during the side wall scraping, the second stirring motor 27 will drive the top scraper 31, the middle scraper 33, the third scraper 35 and the bottom scraper 36 to rotate, so that the side wall is thoroughly cleaned.

[0024] It should also be noted that the first discharge port 18 of the heating tank 10 is connected to the second inlet port 23 of the condensing tank 20 via a pipeline. A suction pump is installed on this pipeline to transport the high-concentration material after heating and concentration in the heating tank 10 to the condensing tank 20 for cooling and crystallization. Alternatively, the installation height of the heating tank 10 may be higher than that of the condensing tank 20, allowing the material to be transported to the condensing tank 20 by gravity. Furthermore, solenoid valves are installed on the first inlet port 11, the second inlet port 23, the first discharge port 18, the second discharge port 22, and the liquid outlet 24.

[0025] Preferably, the cooling assembly 21 includes a first heat exchange coil and a second heat exchange coil spirally arranged around the condenser 20. Both the first and second heat exchange coils include a cooling medium inlet and a cooling medium outlet, with the inlet and outlet directions opposite to each other. By arranging two sets of spiral heat exchange coils and ensuring the inlet and outlet directions of the first and second heat exchange coils are opposite, convection and counter-current cooling flows can be formed around the condenser 20, improving cooling efficiency and allowing the material temperature inside the tank to drop rapidly and uniformly. Simultaneously, this design avoids localized overcooling or excessive temperature gradients during the cooling process, thereby ensuring uniform crystal precipitation and particle size stability.

[0026] Preferably, both the heating tank 10 and the condensing tank 20 are equipped with temperature sensors for real-time monitoring of temperature changes in the materials within the tanks. Data acquired by the temperature sensors can be fed back to the PLC processor, which can then adjust the heating assembly 30 and the cooling assembly 21 to maintain the material temperature within a set range. This ensures the uniformity and stability of the heating and cooling processes, prevents overheating or uneven crystallization due to abnormal temperatures, and improves crystallization efficiency and product quality.

[0027] Preferably, the pitch of the first helical blade 32 is greater than the pitch of the second helical blade 34, so that the first helical blade 32 drives the material downward during stirring, and the first helical blade 32 pushes the upper material downward rapidly, while the second helical blade 34 with a smaller pitch drives the material upward, forming a reverse circulation flow inside the tank. This can achieve thorough mixing and uniform cooling, improving crystallization efficiency and product uniformity.

[0028] Preferably, the lifting assembly 25 is a cylinder lifting assembly 25, a hydraulic rod lifting assembly 25, or a screw lifting assembly 25. This allows for height adjustment of the stirring shaft 28 and its scraper. The lifting assembly 25 drives the second stirring motor 27 and all structures connected to its output to adjust their height. When the bottom scraper 36 descends to its lowest point, it adheres to the hemispherical inner wall of the condenser tank 20, scraping away bottom crystals. Simultaneously, it drives the top scraper 31, middle scraper 33, and third scraper 35 to different heights, scraping away crystals on the sidewalls at different heights. This prevents crystal accumulation on the sidewalls of the condenser tank 20, improving the circulation flow and crystallization uniformity of the material inside the tank. When the lifting assembly 25 rises, the bottom scraper 36 maintains a gap with the tank bottom, reducing interference with the tank body.

[0029] Preferably, the top scraper 31, the middle scraper 33, and the third scraper 35 are all connected to the stirring shaft 28 via a connecting rod 38. This allows them to rotate synchronously when the stirring shaft 28 rotates, thereby effectively scraping the inner wall of the condenser tank 20 at different heights. More preferably, the height of the middle scraper 33 is greater than the height of the top scraper 31 and the third scraper 35. Simultaneously, the connecting rod 38 also serves a stirring function.

[0030] Preferably, the top scraper 31, the middle scraper 33, the third scraper 35, and the arc-shaped scraper on the side away from the stirring shaft 28 are configured as flexible components. This allows the scrapers to deform appropriately when in contact with the inner wall of the condenser 20, increasing the scraping contact area and reducing wear or damage to the tank. Simultaneously, the flexible scrapers can accommodate minor dimensional errors in the tank, improving scraping efficiency and ensuring uniform crystal shedding at the bottom and sidewalls, thereby enhancing the uniformity of cooling crystallization and product quality.

[0031] Preferably, the liquid outlet 24 is connected to the heating tank 10 via a pipe, a suction pump is installed on the pipe, and a solenoid valve is installed at the liquid outlet 24. This is used to pump the solution at the top of the crystallized precipitate in the condenser 20 back to the heating tank 10 for circulating heating, thereby improving the material concentration and crystallization efficiency.

[0032] Preferably, the crystallization apparatus for phenylalanine production also includes a PLC processor and a touch screen connected to the PLC processor. It allows for centralized control of the heating tank 10 and the condensing tank 20, enabling adjustment and control of heating temperature, cooling temperature, stirring speed, and scraper lifting. Simultaneously, operators can monitor the equipment's operating status and material temperature changes in real time via the touch screen, and can set or adjust process parameters according to actual production needs, thereby improving the controllability of the crystallization process and the consistency of product quality. It should be noted that the PLC processor is a Siemens S7-1200 processor with built-in known programs.

[0033] Preferably, the top scraper 31, the middle scraper 33, and the third scraper 35 are all long rectangular scrapers with bevels around their perimeter, so that the scrapers can smoothly conform to the inner wall of the condenser and slide along the wall during rotation and lifting. At the same time, the bevels make the top scraper 31, the middle scraper 33, and the third scraper 35 rotate more smoothly.

[0034] The crystallization apparatus for phenylalanine production provided by this utility model includes a heating tank 10 and a condensing tank 20. By setting a heating component 30 around the outer periphery of the heating tank 10, the material inside the heating tank 10 is heated, allowing some moisture to evaporate, thereby increasing the concentration of the material entering the condensing tank 20, which is conducive to smooth crystallization. The bottom of the condensing tank 20 adopts a hemispherical structure, and a bottom scraper 36 with an arc-shaped scraper is set at the lower end of the stirring shaft 28. When the stirring shaft 28 descends, the bottom scraper 36 can adhere to the hemispherical inner wall of the condensing tank 20 and be driven to rotate by the second stirring motor 27, thereby scraping the hemispherical inner wall at the bottom of the condensing tank 20, effectively preventing crystals from depositing or adhering at the bottom, and ensuring smooth discharge of the material. Meanwhile, the top scraper 31, middle scraper 33, and third scraper 35, sequentially arranged around the outer periphery of the stirring shaft 28, work in conjunction with the lifting assembly 25 to adjust their height, thereby scraping the side wall of the condenser tank 20. This prevents crystals from accumulating at different heights within the tank and avoids the impact of crystals adhering to the inner wall on cooling efficiency, thus improving the uniformity of crystallization. Furthermore, during the initial condensation process in the condenser tank, the second stirring motor 27 operates for a specified time (the stirring time can be adjusted as needed). The first spiral blade 32 and the second spiral blade 34 on the stirring shaft 28 have opposite spiral directions, creating an opposing flow trend during stirring. This allows the material to circulate fully within the condenser tank 20, further improving the stirring effect, resulting in more uniform cooling and promoting uniform precipitation of crystal particles. Therefore, this invention effectively prevents the accumulation of crystals at the bottom and side walls of the tank, and also improves crystallization efficiency and product quality.

[0035] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A crystallization apparatus for phenylalanine production, comprising a heating tank and a condensing tank, wherein a heating element is disposed on the outer periphery of the heating tank, a first inlet, an outlet, and a first stirring motor are disposed on the top of the heating tank, the output end of the first stirring motor is connected to a first stirring element disposed inside the heating tank, a first outlet is disposed on the bottom of the heating tank, and a first solenoid valve is disposed at the first outlet, characterized in that: The condenser is a cylindrical condenser with a hemispherical bottom. A cooling assembly is installed around its outer periphery. A second discharge port is located at the center of the bottom of the condenser. A second inlet port, connected to the first discharge port, is located at the top of the condenser. A liquid outlet, connected to the heating tank, is located on the lower side of the condenser. A lifting assembly, parallel to the height of the condenser, is located on the side of the condenser. A mounting base, perpendicular to the lifting assembly, is connected to the output end of the lifting assembly and is positioned above the condenser. A second stirring motor is installed at the bottom of the mounting base. A stirring shaft is provided at the output end of the second stirring motor. The stirring shaft passes through a rotating seat located at the top center of the condenser and is located inside the condenser. From top to bottom, the outer periphery of the stirring shaft is provided with a top scraper, a first spiral blade, a middle scraper, a second spiral blade, a third scraper, and a bottom scraper. The spiral directions of the first spiral blade and the second spiral blade are opposite. The bottom scraper includes a connecting rod connected to the stirring shaft and an arc-shaped scraper located at the end of the connecting rod.

2. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The heating component is a heating tube or heating wire arranged in a spiral shape around the heating tank.

3. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The cooling assembly includes a first heat exchange coil and a second heat exchange coil arranged in a spiral around the condenser. Both the first and second heat exchange coils include a cooling medium inlet and a cooling medium outlet. The cooling medium inlet and outlet of the first and second heat exchange coils are arranged in opposite directions.

4. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, Temperature sensors are installed in both the heating tank and the condensing tank.

5. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The pitch of the first helical blade is greater than the pitch of the second helical blade.

6. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The first stirring assembly includes a stirring rod and a third spiral blade, a fourth stirring blade, and a fifth spiral blade arranged sequentially from top to bottom on the stirring rod. The spiral directions of the third spiral blade and the fifth spiral blade are opposite, and the fourth stirring blade is perpendicular to the stirring rod.

7. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The lifting assembly is a cylinder lifting assembly, a hydraulic rod lifting assembly, or a screw lifting assembly.

8. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The top scraper, the middle scraper, and the third scraper are all connected to the stirring shaft via a connecting rod.

9. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The top scraper, the middle scraper, the third scraper, and the arc-shaped scraper are configured as flexible parts on the side away from the stirring shaft.

10. The crystallization apparatus for phenylalanine production as described in claim 1, characterized in that, The liquid outlet is connected to the heating tank via a pipe, a suction pump is installed on the pipe, and a solenoid valve is installed at the liquid outlet.

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