Aspartame production wastewater recovery rectification equipment

Abstract

The utility model provides a kind of aspartame production wastewater recovery rectification equipment, including heating tank and rectifying column, the bottom end of heating tank is equipped with heating collar, the top of heating tank one side is equipped with gas outlet, and the bottom end of the side where gas outlet is located is equipped with discharge port, the inside of heating tank is equipped with stirring assembly;The rectifying column includes first cylinder, second cylinder, third cylinder, distribution layer and fourth cylinder, liquid distributor and filler layer are equipped in distribution layer, liquid inlet, catalyst inlet and gas inlet are sequentially equipped in the outer wall of rectifying column from top to bottom, the gas outlet of heating tank is communicated with the gas inlet of rectifying column, the discharge port of heating tank is communicated with the liquid inlet of rectifying column.The equipment is heated sufficiently by heating tank to stir aspartame production wastewater material, further rectification is carried out in combination with rectifying column, improves rectification efficiency and quality, and has strong practicability.

Description

Technical Field

[0001] This utility model belongs to the field of distillation technology, specifically relating to a distillation device for recovering aspartame production wastewater. Background Technology

[0002] Aspartame, chemically known as N-α-L-aspartic-L-phenylalanine methyl ester, is a novel synthetic peptide sweetener with a sweetness approximately 200 times that of sucrose. Currently, this sweetener is approved for use in over 100 countries and regions, and is applied in more than 6,000 beverage, food, and pharmaceutical products. Aspartame is primarily produced through chemical synthesis, using organic compounds such as aspartic acid and phenylalanine as raw materials. These compounds undergo hydrolysis and neutralization to produce aspartame. The wastewater generated during production is a typical high-concentration, recalcitrant organic wastewater, mainly containing salts and amino acids. However, the reaction system in aspartame production often contains acetic anhydride, hydrochloric acid, and large amounts of methanol. Some wastewater may contain residual methanol, hydrochloric acid, and acetic acid, which easily form azeotropes, making separation difficult. Distillation columns are necessary for treatment, but existing distillation columns for aspartame production wastewater recovery suffer from low distillation efficiency, incomplete distillation, and high production costs. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide an aspartame production wastewater recovery and distillation device with good heating effect, high distillation efficiency, and strong practicality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A distillation apparatus for recovering aspartame production wastewater includes a heating tank and a distillation column. The heating tank has a heating ring at its bottom end, and a heat transfer oil heating component is mounted on the heating ring. The heating tank has a feed inlet at its top end, and a guide channel below the feed inlet. A gas outlet is located at the top of one side of the heating tank, and a discharge outlet is located at the bottom of the side where the gas outlet is located. A stirring component is installed inside the heating tank. The distillation column includes a first cylinder, a second cylinder bolted to the first cylinder, a third cylinder bolted to the second cylinder, a distribution layer bolted to the third cylinder, and a fourth cylinder bolted to the distribution layer. The inner wall of the first cylinder is provided with… The distillation column has multiple guide vanes. A gas distributor and an inlet pipe are arranged sequentially from top to bottom inside the second cylinder. A catalyst inlet pipe is arranged inside the third cylinder. A liquid distributor and a packing layer are arranged sequentially from top to bottom inside the distribution layer. A liquid inlet pipe is arranged inside the fourth cylinder. A steam outlet is provided at the top of the distillation column. A liquid inlet, a catalyst inlet, and a gas inlet are arranged sequentially from top to bottom on the outer wall of the distillation column. A base is fixedly connected to the bottom of the distillation column. An arc-shaped through-hole is provided inside the base, and a drain pipe is provided inside the arc-shaped through-hole. The gas outlet of the heating tank is connected to the gas inlet of the distillation column, and the discharge outlet of the heating tank is connected to the liquid inlet of the distillation column.

[0006] Furthermore, the heat transfer oil heating assembly includes a spiral heating tube fixedly connected to the inner wall of the heating sleeve, an oil inlet pipe fixedly connected to the bottom of the heating sleeve, and heat transfer oil disposed inside the heating sleeve.

[0007] Furthermore, the stirring assembly includes a drive motor fixedly connected to one side of the heating tank, and a stirring shaft fixedly connected to the output shaft of the drive motor. Multiple T-shaped stirring rods are fixedly connected to both sides of the stirring shaft. A heating plate is provided inside the T-shaped stirring rod, and the heating plate is electrically connected to a conductive head on one side of the heating tank.

[0008] Furthermore, the guide plates are equidistantly arranged, and the end of the guide plate away from the tower body is inclined.

[0009] Furthermore, the liquid inlet, catalyst inlet, and gas inlet are respectively connected to the liquid inlet pipe, catalyst liquid inlet pipe, and gas inlet pipe, and each of the liquid inlet pipe, catalyst liquid inlet pipe, and gas inlet pipe is equipped with a nozzle.

[0010] Furthermore, the heating tank is equipped with a temperature sensor and a pressure sensor; the top of the distillation column is equipped with a temperature measuring tube and a pressure measuring tube, and the temperature measuring tube is equipped with a temperature sensor and the pressure measuring tube is equipped with a pressure sensor.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention provides a wastewater recovery and distillation device for aspartame production. The device utilizes a heating tank to fully heat and stir the aspartame production wastewater, ensuring uniform and rapid heating and improving distillation efficiency and quality. Further distillation is then performed in conjunction with a distillation column. The high-temperature exhaust from the heating tank vaporizes low-boiling-point alcohols in the wastewater, while a gas-liquid distributor and packing layer ensure sufficient liquid-gas contact and reaction, further enhancing the distillation effect. Furthermore, the first, second, third, distribution, and fourth cylinders of the distillation column are bolted together, allowing for disassembly and assembly according to actual production needs, making it highly practical and adaptable to user requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] In the diagram: 1. Heating tank, 2. Distillation column, 3. Heating ring, 4. Feed inlet, 5. Guide channel, 6. Gas outlet, 7. Discharge outlet, 8. First cylinder, 9. Second cylinder, 10. Third cylinder, 11. Distribution layer, 12. Fourth cylinder, 13. Gas distributor, 14. Gas inlet pipe, 15. Catalyst liquid inlet pipe, 16. Liquid distributor, 17. Packing layer, 18. Liquid inlet pipe, 19. Steam outlet, 20. Liquid inlet, 21. Catalyst inlet, 22. Gas inlet, 23. Drain pipe, 24. Spiral heating tube, 25. Oil inlet pipe, 26. Drive motor, 27. Stirring shaft, 28. T-shaped stirring rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] The terms used in the description of this utility model, such as "upper," "lower," "top," "bottom," "inner," "outer," and "first," are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0017] Reference Figure 1A distillation apparatus for recovering aspartame production wastewater includes a heating tank 1 and a distillation column 2. The heating tank 1 has a heating ring 3 at its bottom end, and a heat transfer oil heating component is mounted on the heating ring 3. The heating tank 1 has a feed inlet 4 at its top end, and a guide channel 5 below the feed inlet 4. The heating tank 1 has a gas outlet 6 at its top side and a discharge outlet 7 at its bottom end on the side where the gas outlet 6 is located. A stirring assembly is installed inside the heating tank 1. The distillation column 2 includes a first cylinder 8, a second cylinder 9 bolted to the first cylinder 8, a third cylinder 10 bolted to the second cylinder 9, a distribution layer 11 bolted to the third cylinder 10, and a fourth cylinder 12 bolted to the distribution layer 11. Multiple guide plates are provided on the inner wall of the first cylinder 8. 12. The second cylinder 9 is provided with a gas distributor 13 and an inlet pipe 14 from top to bottom. The third cylinder 10 is provided with a catalyst inlet pipe 15. The distribution layer 11 is provided with a liquid distributor 16 and a packing layer 17 from top to bottom. The fourth cylinder 12 is provided with a liquid inlet pipe 18. The top of the distillation column 2 is provided with a steam outlet 19. The outer wall of the distillation column 2 is provided with a liquid inlet 20, a catalyst inlet 21 and a gas inlet 22 from top to bottom. The bottom of the distillation column 2 is fixedly connected to a base. The base is provided with an arc-shaped through hole and a drain pipe 23 is provided in the arc-shaped through hole. The gas outlet 6 of the heating tank is connected to the gas inlet 22 of the distillation column. The discharge outlet 7 of the heating tank is connected to the liquid inlet 20 of the distillation column.

[0018] In this utility model, the heat transfer oil heating assembly includes a spiral heating tube 24 fixedly connected to the inner wall of the heating ring, an oil inlet pipe 25 fixedly connected to the bottom of the heating ring, and heat transfer oil disposed inside the heating ring. The spiral heating tube can uniformly heat the heat transfer oil inside the heating ring, so that the heated heat transfer oil can heat the material in the heating tank from the outside.

[0019] In this invention, the stirring assembly includes a drive motor 26 fixedly connected to one side of the heating tank, and a stirring shaft 27 fixedly connected to the output shaft of the drive motor 26. Multiple T-shaped stirring rods 28 are fixedly connected to both sides of the stirring shaft 27. A heating plate is provided inside the T-shaped stirring rod, and the heating plate is electrically connected to a conductive head on one side of the heating tank. The rotating heating plate can uniformly heat the material in the heating tank from the inside.

[0020] In this invention, the guide plates 12 are equidistantly arranged, and the end of the guide plate 12 away from the tower body is inclined. The inclined arrangement is more conducive to liquid flow.

[0021] In this invention, the liquid inlet 20, catalyst inlet 21 and gas inlet 22 are respectively connected to the liquid inlet pipe 18, catalyst liquid inlet pipe 15 and gas inlet pipe 14, and each of the liquid inlet pipe 18, catalyst liquid inlet pipe 15 and gas inlet pipe 14 is equipped with a nozzle to spray out the liquid and gas, which can accelerate the solid-liquid dispersion rate and improve the distillation efficiency.

[0022] In this invention, the heating tank 1 is equipped with a temperature sensor and a pressure sensor to measure the pressure and temperature inside the heating tank, ensuring the heating effect of the material; the top of the distillation column 2 is equipped with a temperature measuring tube and a pressure measuring tube, and the temperature measuring tube is equipped with a temperature sensor and the pressure measuring tube is equipped with a pressure sensor, thereby measuring the pressure and temperature at the top of the distillation column, determining the pressure and temperature of the discharged methanol vapor, and ensuring the purification effect.

[0023] In this invention, the heating tank 1 is fixedly equipped with a liquid pump, which is connected to the pipeline between the heating tank outlet 7 and the distillation column liquid inlet 20. After the material is heated and stirred in the heating tank, the residual liquid is pumped into the distillation column for further distillation.

[0024] Working Principle: During operation, the material first enters the heating tank through the feed inlet. The drive motor is started, causing the stirring shaft and stirring rod to rotate. The stirring rod then rotates the heating plate, which heats the material inside the tank evenly from the inside. Simultaneously, heat transfer oil heated by a spiral heating tube heats the material from the outside. This combined internal and external heating improves the distillation effect. Furthermore, the rotation of the T-shaped stirring rod ensures thorough stirring without dead zones, guaranteeing complete heating. After a certain heating time, the high-temperature vapor from the distilled crude methanol in the heating tank enters the gas inlet of the distillation column through the outlet, while the residual liquid in the heating tank is pumped into the distillation column for further distillation.

[0025] Inside the distillation column, the residual liquid that was not distilled from the heating tank is sprayed from top to bottom through the feed pipe and nozzles into the liquid distributor. High-temperature vapor of crude methanol is sprayed from bottom to top through the gas inlet pipe and dispersed through the gas distributor. At the same time, a catalyst can be added through the catalyst inlet to promote the reaction and conversion. Subsequently, through the thorough mixing of the packing layer, the low-boiling-point alcohols in the liquid are heated and vaporized by the hotter high-temperature vapors and discharged and collected through the vapor outlet at the top of the distillation column. The distilled liquid is discharged and collected through the drain pipe and can be re-entered into the heating tank for heating and reheating to repeat the above steps for distillation.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wastewater recovery and distillation apparatus for aspartame production, comprising a heating tank, characterized in that, The heating tank is provided with a heating ring at the bottom and a heat transfer oil heating component on the heating ring. The heating tank is provided with a feed inlet at the top and a guide groove below the feed inlet. The heating tank is provided with an air outlet at the top of one side and a discharge outlet at the bottom of the side where the air outlet is located. The heating tank is provided with a stirring component inside.

2. The aspartame production wastewater recovery and distillation equipment according to claim 1, characterized in that, The heat transfer oil heating assembly includes a spiral heating tube fixedly connected to the inner wall of the heating sleeve, an oil inlet pipe fixedly connected to the bottom of the heating sleeve, and heat transfer oil disposed inside the heating sleeve.

3. The aspartame production wastewater recovery and distillation equipment according to claim 1, characterized in that, The stirring assembly includes a drive motor fixedly connected to one side of the heating tank, and a stirring shaft fixedly connected to the output shaft of the drive motor. Multiple T-shaped stirring rods are fixedly connected to both sides of the stirring shaft. A heating plate is provided inside the T-shaped stirring rod, and the heating plate is electrically connected to a conductive head on one side of the heating tank.

4. The aspartame production wastewater recovery and distillation equipment according to claim 1, comprising a distillation column, characterized in that, The distillation column includes a first cylinder, a second cylinder bolted to the first cylinder, a third cylinder bolted to the second cylinder, a distribution layer bolted to the third cylinder, and a fourth cylinder bolted to the distribution layer. The inner wall of the first cylinder is provided with multiple guide plates. The second cylinder is provided with a gas distributor and an inlet pipe from top to bottom. The third cylinder is provided with a catalyst inlet pipe. The distribution layer is provided with a liquid distributor and a packing layer from top to bottom. The fourth cylinder is provided with a liquid inlet pipe.

5. The aspartame production wastewater recovery and distillation equipment according to claim 4, characterized in that, The top of the distillation column is provided with a steam outlet. The outer wall of the distillation column is provided with a liquid inlet, a catalyst inlet and a gas inlet from top to bottom. The bottom of the distillation column is fixedly connected to a base. The base is provided with an arc-shaped through hole and a drain pipe is provided in the arc-shaped through hole. The gas outlet of the heating tank is connected to the gas inlet of the distillation column, and the discharge outlet of the heating tank is connected to the liquid inlet of the distillation column.

6. The aspartame production wastewater recovery and distillation equipment according to claim 4, characterized in that, The guide plates are equidistantly arranged, and the end of the guide plate away from the tower body is inclined.

7. The aspartame production wastewater recovery and distillation equipment according to claim 5, characterized in that, The liquid inlet, catalyst inlet, and gas inlet are respectively connected to the liquid inlet pipe, catalyst liquid inlet pipe, and gas inlet pipe, and each of the liquid inlet pipe, catalyst liquid inlet pipe, and gas inlet pipe is equipped with a nozzle.

Images