Evaporator for amino acid production

Abstract

The utility model discloses an evaporator for amino acid production belongs to amino acid production field, including evaporator casing, install first evaporating unit - third evaporating unit in evaporating inner chamber, be provided with first cavity between first evaporating unit and second evaporating unit, be provided with second cavity between second evaporating unit and third evaporating unit, form third cavity between the bottom of third evaporating unit and the bottom inner wall of evaporator casing, install first - third liquid spray unit in evaporating inner chamber, be provided with first baffle in first cavity, open first hole in the central position of first baffle, install first inner tube in first hole, be provided with second baffle in second cavity, open second hole in the central position of second baffle, install second inner tube in second hole. The utility model can reasonably improve energy efficiency and avoid broken amino acid internal molecular structure, and prevent amino acid acidic side chain in removing acid and be removed.

Description

Technical Field

[0001] This utility model relates to amino acid production, and more specifically, to an evaporator for amino acid production. Background Technology

[0002] Amino acids are organic compounds containing basic amino and acidic carboxyl groups. They are formed when the hydrogen atoms on the carbon atoms of carboxylic acids are replaced by amino groups. Amino acids need to undergo hydrolysis during preparation. In order to reduce the acid concentration inside the amino acid hydrolysate, mechanical acid removal treatment is required.

[0003] The invention patent CN202010309535.2 discloses a method for removing acid from substances using a temperature-controlled acid removal device, which has the same effect as an electric hot plate acid removal device. Although it can achieve the purpose of removing acid to a certain extent, for hydrolysate in the amino acid production process, the temperature-controlled acid removal device method is prone to local high temperature points that can easily break the molecular structure inside the amino acids. In addition, the energy is not effectively utilized. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an evaporator for amino acid production, aiming to solve at least one of the problems in the background art.

[0005] An evaporator for amino acid production includes an evaporator shell forming an evaporation cavity. A first pipe is connected to the top of the evaporator shell, and a second pipe is connected to the bottom. A first evaporation unit, a second evaporation unit, and a third evaporation unit are sequentially installed from top to bottom within the evaporation cavity. A first cavity is formed between the first and second evaporation units, and a second cavity is formed between the second and third evaporation units. A third cavity is formed between the bottom of the third evaporation unit and the bottom inner wall of the evaporator shell. A first spray unit is positioned between the top inner wall of the evaporator shell and the top of the first evaporation unit, and the first spray unit is connected to the first pipe. A first partition is positioned within the first cavity, with a first hole at its center, into which a first inner tube is installed. A second spray unit is positioned below the first partition. The first cavity is connected to a first secondary steam overflow pipe. A second partition is positioned within the second cavity, with a second hole at its center, into which a second inner tube is installed. A third spray unit is positioned below the second partition. The second cavity is connected to a second secondary steam overflow pipe, and the third cavity is connected to a third secondary steam overflow pipe.

[0006] Optionally, the heat mass temperature of the first evaporation unit is less than the heat mass temperature of the second evaporation unit and less than the heat mass temperature of the third evaporation unit.

[0007] Optionally, the evaporator for amino acid production further includes a hot steam inlet pipe, a hot steam outlet pipe, a first connecting pipe, and a second connecting pipe. One end of the hot steam inlet pipe is connected to the hot steam pipeline network, and the other end passes through the evaporator shell and is connected to the hot steam inlet of the third evaporation unit. One end of the hot steam outlet pipe passes through the evaporator shell and is connected to the hot steam outlet of the first evaporation unit, and the other end is connected to the waste heat utilization equipment. One end of the second connecting pipe is connected to the hot steam outlet of the third evaporation unit, and the other end is connected to the hot steam inlet of the second evaporation unit. One end of the first connecting pipe is connected to the hot steam outlet of the second evaporation unit, and the other end is connected to the hot steam inlet of the first evaporation unit.

[0008] Optionally, a first baffle is provided in the first cavity, a second baffle is provided in the second cavity, and a third baffle is provided in the third cavity. The first baffle is located above the first partition, and the second baffle is located above the second partition.

[0009] Optionally, the first baffle, the second baffle, and the third baffle are all downwardly inclined plates.

[0010] Optionally, the inclination angle of the inclined plate is 10 to 20°.

[0011] Optionally, the first evaporation unit, the second evaporation unit, and the third evaporation unit are serpentine tubes or U-shaped tubes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention can reasonably improve energy efficiency, avoid breaking the internal molecular structure of amino acids, and prevent the acidic side chains of amino acids from being removed during deacidification. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the deacidification system for hydrolysate in amino acid production according to this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of the evaporator for amino acid production according to this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Hydrolysate storage tank; 2. Hydrolysate evaporator; 21. Evaporator shell; 22. Evaporation chamber; 23. First evaporation unit; 231. First spray unit; 232. Hot steam outlet pipe; 24. Second evaporation unit; 25. Third evaporation unit; 251. Hot steam inlet pipe; 26. First chamber; 261. First partition; 262. First hole; 263. First inner tube; 264. Second spray unit; 265. First secondary steam overflow pipe; 266. First connecting pipe; 267. 27. First baffle, 27. Second chamber, 271. Second partition, 272. Second hole, 273. Second inner tube, 274. Third spray unit, 275. Second secondary steam overflow pipe, 276. Second connecting pipe, 277. Second baffle, 28. Third chamber, 281. Third secondary steam overflow pipe, 282. Third baffle, 3. Separator, 4. Anion exchange resin, 5. First pipe, 6. Second pipe, 7. Third pipe, 8. Preheater, 9. Gas outlet pipe, 10. Acid discharge pipe, 11. Hydrolyzed liquid pipe after acid discharge. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise precisely specified.

[0020] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0023] Please refer to Figures 1-2 An acid removal system for hydrolysate in amino acid production includes a hydrolysate storage tank 1, a hydrolysate evaporator 2, a separation tank 3, an anion exchange resin 4, a first pipe 5, a second pipe 6, and a third pipe 7. One end of the first pipe 5 is connected to the hydrolysate storage tank 1 and the acid removal is incomplete, while the other end is connected to the top of the hydrolysate evaporator 2. One end of the second pipe 6 is connected to the bottom of the hydrolysate evaporator 2 and the other end is connected to the top of the anion exchange resin 4. One end of the third pipe 7 is connected to the hydrolysate evaporator 2 and the other end is connected to the separation tank 3.

[0024] By using the hydrolysate evaporator 2 in conjunction with the anion exchange resin 4, the hydrolysate produced in amino acid production is deacidified. Due to the raw materials used in the production process, the acid adjustment, and the amino acids themselves, the hydrolysate contains organic acids such as hydrochloric acid, sulfuric acid, lactic acid, and acetic acid, as well as acidic side chains of amino acids (which are part of the product). Sulfuric acid cannot be removed by heating. Therefore, after the hydrochloric acid and organic acids are removed by the hydrolysate evaporator 2, the anion exchange resin 4 adsorbs sulfate ions in the hydrolysate, thereby completely removing sulfate ions from the hydrolysate.

[0025] In one or more specific embodiments of this example, in order to reduce the burden on the hydrolysate evaporator 2 and improve thermal efficiency, a preheater 8 is installed on the first pipe 5 to preheat the hydrolysate from the hydrolysate storage tank 1.

[0026] In one or more specific embodiments of this example, the top of the separation tank 3 is connected to an exhaust pipe 9 and an acid discharge pipe 10, and the bottom of the anion exchange resin 4 is connected to a hydrolysate pipe 11 after acid discharge.

[0027] In one or more specific embodiments of this example, the hydrolysate storage tank 1, the hydrolysate evaporator 2, the separation tank 3, the anion exchange resin 4, the first pipe 5, the second pipe 6, and the third pipe 7 are all made of acid-resistant materials.

[0028] In one or more specific embodiments of this example, the anion exchange resin 4 is Purolite A520E.

[0029] In one or more specific embodiments of this example, in order to more rationally improve energy efficiency and avoid breaking the internal molecular structure of amino acids, and to prevent the acidic side chains of amino acids from being removed during acid removal, the desiccant evaporator 2 includes an evaporator shell 21, which encloses an evaporation cavity 22. A first evaporation unit 23, a second evaporation unit 24, and a third evaporation unit 25 are sequentially installed in the evaporation cavity 22 from top to bottom. A first cavity 26 is provided between the first evaporation unit 23 and the second evaporation unit 24, and a second cavity 27 is provided between the second evaporation unit 24 and the third evaporation unit 25. A third cavity 28 is formed between the bottom of the third evaporation unit 25 and the bottom inner wall of the evaporator shell 21. The top inner wall of the evaporator shell 21 and the top of the first evaporation unit 23 are connected... A first spray unit 231 is provided in the first chamber 26, which is connected to the first pipe 5. A first partition 261 is provided in the first chamber 26, and a first hole 262 is opened at the center of the first partition 261. A first inner pipe 263 is installed in the first hole 262. A second spray unit 264 is provided below the first partition 261. The first chamber 26 is connected to a first secondary steam overflow pipe 265. A second partition 271 is provided in the second chamber 27, and a second hole 272 is opened at the center of the second partition 271. A second inner pipe 273 is installed in the second hole 272. A third spray unit 274 is provided below the second partition 271. The second chamber 27 is connected to a second secondary steam overflow pipe 275. The third chamber 28 is connected to a third secondary steam overflow pipe 281.

[0030] The outlet ends of the first and second steam overflow pipes 265, the second and third steam overflow pipes 275, and the third and third steam overflow pipes 281 are connected to the third pipe 7.

[0031] The first spraying unit 231 is used to spray the hydrolysate from the hydrolysate storage tank 1 onto the first evaporation unit 23 for evaporation. The second spraying unit 264 is used to spray the liquid in the first chamber 26 onto the second evaporation unit 24 for evaporation. The third spraying unit 274 is used to spray the liquid in the second chamber 27 onto the third chamber 28 for evaporation.

[0032] By setting up a first evaporation unit 23, a second evaporation unit 24, and a third evaporation unit 25, as well as a first spray unit 231, a second spray unit 264, and a third spray unit 274, segmented evaporation and separation are performed, which is more conducive to removing acid from the hydrolysate. During operation, the evaporation temperature of the first evaporation unit 23, the second evaporation unit 24, and the third evaporation unit 25 should be lower than the evaporation temperature of the acidic side chain of amino acids.

[0033] In one or more specific embodiments of this example, in order to improve thermal efficiency, the hydrochloric acid, which is relatively easy to remove, can be removed in the first evaporation unit 23, the small-molecule organic acid can be removed in the second evaporation unit 24, and the large-molecule organic acid can be removed in the third spraying unit 274, according to the ease of evaporation of hydrochloric acid, sulfuric acid, organic acid and acidic side chains of amino acids in the hydrolysate. At this time, the thermomass temperature of the first evaporation unit 23 is less than the thermomass temperature of the second evaporation unit 24 and the thermomass temperature of the third evaporation unit 25.

[0034] In one or more specific embodiments of this example, to further improve thermal efficiency, the liquid evaporator 2 further includes a hot mass steam inlet pipe 251, a hot mass steam outlet pipe 232, a first connecting pipe 266, and a second connecting pipe 276. One end of the hot mass steam inlet pipe 251 is connected to the hot mass steam network, and the other end passes through the evaporator shell 21 and is connected to the hot mass inlet of the third evaporation unit 25. One end of the hot mass steam outlet pipe 232 passes through the evaporator shell 21 and is connected to the hot mass outlet of the first evaporation unit 23, and the other end is connected to the waste heat recovery equipment. One end of the second connecting pipe 276 is connected to the hot mass outlet of the third evaporation unit 25, and the other end is connected to the hot mass inlet of the second evaporation unit 24. One end of the first connecting pipe 266 is connected to the hot mass outlet of the second evaporation unit 24, and the other end is connected to the hot mass inlet of the first evaporation unit 23. With this arrangement, when the hot mass temperature is high, components that are more difficult to evaporate are evaporated, and when the temperature is low, components that are easier to evaporate are evaporated. Furthermore, the calorific value moves in the opposite direction to the cold mass, further improving thermal efficiency. In this utility model, the waste heat utilization device can be a preheater 8.

[0035] In one or more specific embodiments of this example, to effectively perform gas-liquid separation, a first baffle 267 is provided in the first chamber 26, a second baffle 277 is provided in the second chamber 27, and a third baffle 282 is provided in the third chamber 28. The first baffle 267 is located above the first partition 261, and the second baffle 277 is located above the second partition 271. The first baffle 267, the second baffle 277, and the third baffle 282 prevent evaporated gas in the gas-liquid mixture of the first chamber 26, the second chamber 27, and the third chamber 28 from overflowing, thereby achieving more effective separation.

[0036] In one or more specific embodiments of this example, the first baffle 267, the second baffle 277 and the third baffle 282 are all downwardly inclined plates with an inclination angle of 10 to 20°, which can achieve a better blocking effect.

[0037] In one or more specific embodiments of this example, the first evaporation unit 23, the second evaporation unit 24, and the third evaporation unit 25 can be serpentine tubes or U-shaped tubes, without particular limitation. As long as the liquid sprayed from the first spray unit 231, the second spray unit 264, and the third spray unit 274 can evaporate on the first evaporation unit 23, the second evaporation unit 24, and the third evaporation unit 25 and then move downwards under the action of gravity, it is acceptable. The heat mass can flow inside the tube and the liquid can be sprayed on the outer wall of the tube, or the heat mass can flow outside the tube and the liquid can be sprayed inside the tube and flow along the inner wall of the tube to evaporate. Without particular limitation, those skilled in the art can choose according to their needs.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An evaporator for amino acid production, comprising an evaporator shell (21) forming an evaporation cavity (22), a first pipe (5) connected to the top of the evaporator shell (21), and a second pipe (6) connected to the bottom, characterized in that, The evaporation chamber (22) is equipped with a first evaporation unit (23), a second evaporation unit (24), and a third evaporation unit (25) sequentially from top to bottom. A first cavity (26) is provided between the first evaporation unit (23) and the second evaporation unit (24). A second cavity (27) is provided between the second evaporation unit (24) and the third evaporation unit (25). A third cavity (28) is formed between the bottom of the third evaporation unit (25) and the bottom inner wall of the evaporator shell (21). A first spray unit (231) is provided between the top inner wall of the evaporator shell (21) and the top of the first evaporation unit (23). The first spray unit (231) is connected to the first pipe (5). A first partition (26) is provided in the first cavity (26). 1) A first hole (262) is opened at the center of the first partition (261), and a first inner tube (263) is installed in the first hole (262). A second spray unit (264) is arranged below the first partition (261). A first secondary steam overflow pipe (265) is connected to the first cavity (26). A second partition (271) is arranged in the second cavity (27). A second hole (272) is opened at the center of the second partition (271). A second inner tube (273) is installed in the second hole (272). A third spray unit (274) is arranged below the second partition (271). A second secondary steam overflow pipe (275) is connected to the second cavity (27). A third secondary steam overflow pipe (281) is connected to the third cavity (28).

2. The evaporator for amino acid production according to claim 1, characterized in that, The heat mass temperature of the first evaporation unit (23) is less than the heat mass temperature of the second evaporation unit (24) and less than the heat mass temperature of the third evaporation unit (25).

3. The evaporator for amino acid production according to claim 1, characterized in that, The evaporator for amino acid production also includes a hot steam inlet pipe (251), a hot steam outlet pipe (232), a first connecting pipe (266), and a second connecting pipe (276). One end of the hot steam inlet pipe (251) is connected to the hot steam pipeline network, and the other end passes through the evaporator shell (21) and is connected to the hot steam inlet of the third evaporation unit (25). One end of the hot steam outlet pipe (232) passes through the evaporator shell (21) and is connected to the hot steam outlet of the first evaporation unit (23), and the other end is connected to the waste heat utilization equipment. One end of the second connecting pipe (276) is connected to the hot steam outlet of the third evaporation unit (25), and the other end is connected to the hot steam inlet of the second evaporation unit (24). One end of the first connecting pipe (266) is connected to the hot steam outlet of the second evaporation unit (24), and the other end is connected to the hot steam inlet of the first evaporation unit (23).

4. The evaporator for amino acid production according to claim 1, characterized in that, A first baffle (267) is provided in the first cavity (26), a second baffle (277) is provided in the second cavity (27), and a third baffle (282) is provided in the third cavity (28). The first baffle (267) is located above the first partition (261), and the second baffle (277) is located above the second partition (271).

5. The evaporator for amino acid production according to claim 4, characterized in that, The first baffle (267), the second baffle (277) and the third baffle (282) are all downwardly inclined plates.

6. The evaporator for amino acid production according to claim 5, characterized in that, The inclination angle of the inclined plate is 10 to 20°.

7. The evaporator for amino acid production according to claim 1, characterized in that, The first evaporation unit (23), the second evaporation unit (24) and the third evaporation unit (25) are serpentine tubes or U-shaped tubes.

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