Arginine triple-effect evaporative crystallization system
By designing a triple-effect evaporation crystallization system for arginine, the problems of high crystallization control difficulty, low efficiency, and equipment blockage were solved, realizing efficient and environmentally friendly arginine crystallization production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-04-03
AI Technical Summary
Existing arginine evaporation crystallization systems are difficult to control during crystallization, have low crystallization efficiency, are hard to guarantee crystallization quality, are prone to clogging, and the waste condensate generated during the crystallization process pollutes the environment.
A triple-effect evaporation crystallization system for arginine was designed. By connecting a first-effect evaporator, a second-effect evaporator, and a third-effect crystallizer in series, and combining them with a first-stage and a second-stage condenser, the system achieves full utilization of thermal energy and stable temperature control. A stirring device is installed to prevent blockage, and the energy utilization rate is improved by arranging the steam and raw material transport in reverse.
This technology enables stable control of crystallization temperature, improves crystallization quality and efficiency, avoids equipment blockage, reduces production costs, and minimizes environmental pollution.
Smart Images
Figure CN224071176U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biomanufacturing technology, and in particular to an arginine triple-effect evaporation crystallization system. Background Technology
[0002] Arginine, chemically known as 2-amino-5-guanidino-valerate, is an important amino acid. It is abundant in protamine sulfate and is a fundamental component of various proteins, thus its presence is widespread. During early childhood, arginine is an essential amino acid, playing a crucial role in maintaining normal physiological functions and growth. Arginine also possesses detoxification properties, promotes wound healing, enhances immune function, and regulates hormone levels. In industrial production, arginine is prepared through processes such as fermentation, extraction, and purification. Concentration and evaporation crystallization are key steps in the arginine preparation process. Concentration increases the concentration of the arginine solution, providing more favorable conditions for subsequent crystallization. Evaporation crystallization involves evaporating the concentrated arginine solution until it gradually reaches saturation, ultimately precipitating arginine crystals.
[0003] A series of problems exist in the concentration and evaporation crystallization process of arginine. For example, improper equipment and process conditions, such as poor control of temperature, pressure, and stirring speed, can lead to low crystallization efficiency, affecting the yield, morphology, and size of arginine crystals. The morphology and size of arginine crystals significantly impact their application performance; unsuitable crystallization conditions can result in irregular crystal shapes and uneven sizes, thus affecting the quality of the crystalline product. During evaporation crystallization, the viscosity of the arginine solution and the deposition of crystalline substances can cause equipment blockage, affecting production efficiency and product quality. Furthermore, the concentration and evaporation crystallization process may generate waste condensate, which, if not recycled and treated, could pollute the environment.
[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design an arginine triple-effect evaporation crystallization system to solve the above problems.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content
[0006] To overcome the shortcomings of the prior art, the present invention discloses an arginine triple-effect evaporation crystallization system, which solves the problems of high difficulty in controlling the crystallization operation, low crystallization efficiency, difficulty in guaranteeing crystallization quality, easy clogging of the crystallization device, and environmental pollution caused by wastewater generated during the crystallization process in the traditional arginine evaporation crystallization system.
[0007] This utility model discloses an arginine triple-effect evaporation and crystallization system, comprising a raw material tank, a feed pump, a cold material channel of a first preheater, a cold material channel of a second preheater, a first-effect evaporator, a first-effect separator, a first-effect feed pump, a second-effect evaporator, a second-effect separator, a second-effect feed pump, a triple crystallizer, a discharge pump, and an inlet buffer tank pipe connected in series via pipelines to form a raw material processing and conveying channel. The first-effect evaporator is also connected to the first-effect feed pump via a pipeline, the second-effect evaporator is also connected to the second-effect feed pump via a pipeline, and the steam inlet of the first-effect evaporator is connected to the steam inlet pipeline.
[0008] The lower condensate outlets of the first-effect and second-effect evaporators are connected to the inlet of the primary condensate tank via pipes. The exhaust port of the first-effect separator is connected to the inlet of the hot material channel of the second preheater and the upper steam inlet of the second-effect evaporator via pipes. The outlet of the hot material channel of the second preheater is connected to the middle steam inlet of the second-effect evaporator. The exhaust port of the second-effect separator is connected to the inlet of the hot material channel of the first preheater and the steam inlet of the third-effect crystallizer via pipes. The outlet of the hot material channel of the first preheater is connected to the inlet of the secondary condensate tank via a pipe. The system consists of a first-effect evaporator, a second-effect evaporator, a third-effect crystallizer, a second preheater, a first preheater, and a secondary condensate tank. The exhaust port of the evaporator is connected to the air inlet of the first-stage condenser via a pipe. The first-stage condenser has a water inlet and a water return inlet, which are respectively connected to the circulating water inlet pipe and the circulating water return pipe. The exhaust port of the first-stage condenser is connected to the air inlet of the second-stage condenser via a pipe. The bottom of the second-stage condenser has a water inlet and a water return inlet, which are respectively connected to the cold water inlet pipe and the cold water return pipe. The condensate outlet of the second-stage condenser is connected to the water inlet of the secondary condensate tank. The exhaust port of the second-stage condenser is connected to the vacuum pump, and the outlet of the vacuum pump is connected to the exhaust pipe. This allows the evaporation system and the crystallization system to be used in combination, so that the heating temperature of the raw material increases gradually and steadily, ensuring heat exchange efficiency and temperature controllability.
[0009] Preferred technical solution: The top of the raw material tank is also equipped with a return port, which is connected to the discharge port of the discharge pump through a pipe to increase the utilization rate of raw materials.
[0010] Preferred technical solution: The discharge port at the bottom of the primary condensate tank is connected to the inlet of the primary condensate pump via a pipeline, and the outlet of the primary condensate pump is connected to the primary condensate main pipe to collect the primary condensate and avoid environmental pollution.
[0011] Preferred technical solution: The pipeline between the feed pump and the first preheater passes through the hot material channel of the heat exchanger, and the outlet of the first-stage condensate pump is connected to the primary condensate main pipe through the hot material channel of the heat exchanger. Since the temperature of the primary condensate is relatively high, the primary condensate can be used to preheat the raw materials, which can improve the energy utilization rate.
[0012] Preferred technical solution: The top inlet of the first-effect evaporator is connected to the discharge port of the first-effect feed pump through a pipe; the top inlet of the second-effect evaporator is connected to the discharge port of the second-effect feed pump through a pipe; the bottom inlet of the third-effect crystallizer is connected to the discharge port of the discharge pump through a pipe, thereby adding a circulation loop at the first, second, and third-effect evaporation and crystallization points to increase the effective utilization rate of raw materials.
[0013] Preferred technical solution: The upper and lower parts of the first-effect evaporator and the second-effect evaporator are equipped with exhaust ports and connected to the air inlet of the first-stage condenser through pipes. The third-effect crystallizer has three exhaust ports at the top, middle and lower parts and connected to the air inlet of the first-stage condenser through pipes. The upper and lower parts of the first-stage condenser are equipped with exhaust ports and connected to the inlet of the second-stage condenser and the secondary condensate tank through pipes. The upper and lower parts of the second-stage condenser are equipped with exhaust ports and connected to the vacuum pump through pipes, thereby improving the gas discharge efficiency in the system.
[0014] Preferred technical solution: The side wall of the raw material tank and the bottom of the triple-effect crystallizer are equipped with a lower stirring paddle to promote the movement of raw materials and crystals through stirring and avoid equipment blockage.
[0015] Preferred technical solution: The bottom outlet of the secondary condensate tank is connected to the inlet of the secondary condensate pump through a pipeline. The outlet of the secondary condensate pump is connected to the pipelines of the secondary condensate main pipe and the inlet coil of the buffer tank, respectively, to collect the secondary condensate and avoid environmental pollution.
[0016] Preferred technical solution: A water inlet pipe is also connected to the pipeline between the feed pump and the cold material channel of the first preheater.
[0017] Preferred technical solution: Valves are installed on the pipes in the evaporation crystallization system to facilitate system control.
[0018] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:
[0019] This invention relates to a triple-effect evaporation crystallization system for arginine. By cleverly and effectively combining evaporation concentration and evaporation crystallization technologies, it fully utilizes the heat energy of each part of the system, ensuring sufficient heat exchange between steam and materials to achieve thermal equilibrium. This results in a stable, consistent, and easily controllable system temperature. In particular, the system fully utilizes the heat energy of the condensate for heat exchange, making temperature control even easier. The crystallization equipment is equipped with a lower stirring device, effectively preventing equipment blockage caused by the deposition of crystalline material, allowing for more uniform crystal growth, and simultaneously ensuring a more stable crystallization temperature. This allows for effective control of the crystallization conditions. By arranging the steam and raw material transport in reverse order, the system not only maximizes steam utilization and saves energy, but also significantly improves the crystallization quality of the product, ensuring stable and uniform crystal morphology. Its circulation design improves raw material utilization and reduces production costs. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of an arginine triple-effect evaporation crystallization system according to the present invention.
[0022] In the attached diagrams above, 1. Raw material tank; 2. Heat exchanger; 3. First-effect evaporator; 4. First-effect separator; 5. Second-effect evaporator; 6. Second-effect separator; 7. Third-effect crystallizer; 8. First-stage condenser; 9. Second-stage condenser; 10. Second preheater; 11. First preheater; 12. Primary condensate tank; 13. Secondary condensate tank; 14. Feed pump; 15. First-stage condensate pump; 16. First-effect feed pump; 17. Second-effect feed pump; 18. Discharge pump; 19. Second-stage condensate pump; 20. Vacuum pump. Detailed Implementation
[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover 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.
[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0027] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] Example:
[0030] like Figure 1As shown, this utility model discloses a triple-effect evaporation and crystallization system for arginine, including a raw material tank 1, a heat exchanger 2, a first-effect evaporator 3, a first-effect separator 4, a second-effect evaporator 5, a second-effect separator 6, a triple-effect crystallizer 7, a first-stage condenser 8, a second-stage condenser 9, a second preheater 10, a first preheater 11, a primary condensate tank 12, a secondary condensate tank 13, a feed pump 14, a primary condensate pump 15, a first-effect feed pump 16, a second-effect feed pump 17, a discharge pump 18, a secondary condensate pump 19, and a vacuum pump 20. The main components of this utility model will be described in detail below:
[0031] like Figure 1 As shown, the discharge port of raw material tank 1 is connected to the inlet of feed pump 14 via a pipe. The discharge port of feed pump 14 is connected to the cold material inlet of the first preheater 11. The cold material outlet of the first preheater 11 is connected to the cold material inlet of the second preheater 10 via a pipe. The cold material outlet of the second preheater 10 is connected to the top inlet of the first-effect evaporator 3 via a pipe. The first-effect evaporator 3 is connected to the first-effect separator 4 via a pipe. The lower discharge ports of the first-effect evaporator 3 and the first-effect separator 4 are connected to the feed port of the first-effect feed pump 16 via a pipe. The discharge port of the first-effect feed pump 16 is connected to the inlet of the second-effect evaporator 5 via a pipe; the second-effect evaporator 5 is connected to the second-effect separator 6 via a pipe; the lower discharge ports of the second-effect evaporator 5 and the second-effect separator 6 are connected to the inlet of the second-effect feed pump 17 via a pipe; the discharge port of the second-effect feed pump 17 is connected to the inlet of the middle part of the third-effect crystallizer 7 via a pipe; the lower discharge port of the third-effect crystallizer 7 is connected to the inlet of the discharge pump 18 via a pipe; and the discharge port of the discharge pump 18 is connected to the inlet buffer tank pipe.
[0032] like Figure 1As shown, the steam inlet of the first-effect evaporator 3 is connected to the steam inlet pipe. The exhaust ports of the first-effect evaporator 3, the second-effect evaporator 5, the third-effect crystallizer 7, the second preheater 10, the first preheater 11, and the secondary condensate tank 13 are connected to the air inlet of the first-stage condenser 8 via pipes. The lower condensate outlets of the first-effect evaporator 3 and the second-effect evaporator 5 are connected to the water inlet of the primary condensate tank 12 via pipes. The exhaust port of the first-effect separator 4 is connected to the hot material inlet of the second preheater 10 and the upper steam inlet of the second-effect evaporator 5 via pipes. The hot material outlet of the second preheater 10 is connected to the steam inlet in the middle of the second-effect evaporator 5. The exhaust port of the second-effect separator 6 is connected to the steam inlet via pipes. The heat inlet of the first preheater 11 and the steam inlet of the triple-effect crystallizer 7 are connected. The heat outlet of the first preheater 11 is connected to the inlet of the secondary condensate tank 13 via a pipe. The first-stage condenser 8 is provided with an inlet and a return outlet, which are respectively connected to the circulating water inlet pipe and the circulating water return pipe. The exhaust port of the first-stage condenser 8 is connected to the air inlet of the second-stage condenser 9 via a pipe. The bottom of the second-stage condenser 9 is provided with an inlet and a return outlet, which are respectively connected to the 7℃ cold water inlet pipe and the 12℃ cold water return pipe. The condensate interface of the second-stage condenser 9 is connected to the inlet of the secondary condensate tank 13. The second-stage condenser 9 is connected to the vacuum pump 20, and the outlet of the vacuum pump 20 is connected to the exhaust pipe.
[0033] The method and principle of this utility model are as follows: In use, the raw material is fed from the raw material tank 1 through the feed pump 14, the first preheater 11, the second preheater 10, the first-effect evaporator 3, the first-effect separator 4, the second-effect evaporator 5, the second-effect separator 6, and the third-effect crystallizer 7, and finally enters the buffer tank. The heating steam enters from the first-effect evaporator 3, passes through the first-effect separator 4, the second preheater 10, the second-effect evaporator 5, the second-effect separator 6, the first preheater 11, and the third-effect crystallizer 7. The steam and the raw material are transported in opposite directions, so that the temperature of the raw material gradually increases during the transport and processing process, thereby improving the stability of the crystallization temperature and improving the crystallization quality. During the evaporation and crystallization process, exhaust treatment is carried out at the first, second, and third-effect evaporation and crystallization points, and the exhaust gas is exchanged with the raw material again. The raw material is used to cool down and initially condense the extracted steam, which increases the temperature of the raw material and reduces the amount of condensate consumed by steam condensation.
[0034] like Figure 1 As shown, in order to increase the utilization rate of raw materials, the top of the raw material tank 1 is also provided with a return port, which is connected to the discharge port of the discharge pump 18 through a pipe, so that the processed raw materials can flow back into the raw material tank 1 for recycling.
[0035] like Figure 1As shown, to avoid environmental pollution, the bottom outlet of the primary condensate tank 12 is connected to the inlet of the primary condensate pump 15 via a pipe, and the outlet of the primary condensate pump 15 is connected to the primary condensate main pipe; the bottom outlet of the secondary condensate tank 13 is connected to the inlet of the secondary condensate pump 19 via a pipe, and the outlet of the secondary condensate pump 19 is connected to the secondary condensate main pipe and the pipe for entering the buffer tank coil, respectively, so that the primary and secondary condensate are collected and treated separately to avoid environmental pollution.
[0036] like Figure 1 As shown, in order to improve energy utilization, the pipeline between the feed pump 14 and the first preheater 11 passes through the hot material channel of the heat exchanger 2. The outlet of the primary condensate pump 15 is connected to the primary condensate main pipe through the pipeline passing through the hot material channel of the heat exchanger 2. Because the temperature of the primary condensate is high, the primary condensate is used to preheat the raw materials.
[0037] like Figure 1 As shown, in order to improve the effective utilization rate of raw materials, the top inlet of the first-effect evaporator 3 is connected to the discharge port of the first-effect feed pump 16 through a pipe to form a circulation loop; the top inlet of the second-effect evaporator 5 is connected to the discharge port of the second-effect feed pump 17 through a pipe to form a circulation loop; and the bottom inlet of the third-effect crystallizer 7 is connected to the discharge port of the discharge pump 18 through a pipe to form a circulation loop.
[0038] like Figure 1 As shown, to improve the evaporation and crystallization efficiency, the upper and lower parts of the first-effect evaporator 3 and the second-effect evaporator 5 are equipped with exhaust ports and connected to the air inlet of the first-stage condenser 8 through pipes. The third-effect crystallizer 7 has three exhaust ports at the top, middle and lower parts and connected to the air inlet of the first-stage condenser 8 through pipes. The upper and lower parts of the first-stage condenser 8 are equipped with exhaust ports and connected to the inlet of the second-stage condenser 9 and the secondary condensate tank 13 through pipes. The upper and lower parts of the second-stage condenser 9 are equipped with exhaust ports and connected to the vacuum pump 20 through pipes. This improves the gas discharge efficiency in the system, reduces the gas pressure above the raw material liquid surface, and improves the evaporation and crystallization efficiency of the raw material.
[0039] like Figure 1 As shown, to avoid blockage of the pipelines in the system, a lower stirring paddle is installed on the side wall of the raw material tank 1 and the bottom of the triple-effect crystallizer 7. The stirring promotes the movement of liquid and crystals, thus avoiding blockage.
[0040] like Figure 1 As shown, to prevent the raw materials from becoming too viscous and clogging the system, a water inlet pipe is connected to the pipeline between the feed pump 14 and the cold material channel of the first preheater 11 to dilute the raw materials.
[0041] like Figure 1 As shown, valves are installed on the pipes in the evaporation crystallization system to facilitate system control.
[0042] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An arginine triple-effect evaporative crystallization system comprising a raw material processing and conveying channel formed by connecting in series by pipes a raw material tank (1), a feed pump (14), a cold material passage of a first preheater (11), a cold material passage of a second preheater (10), a first-effect evaporator (3), a first-effect separator (4), a first-effect material passing pump (16), a second-effect evaporator (5), a second-effect separator (6), a second-effect material passing pump (17), a third-effect crystallizer (7), a discharge pump (18), and a feed buffer tank, wherein, The one-effect evaporator (3) is also connected with the one-effect material passing pump (16) through a pipeline, the two-effect evaporator (5) is also connected with the two-effect material passing pump (17) through a pipeline, and the steam inlet of the one-effect evaporator (3) is connected with the steam inlet pipeline. The lower condensate water outlet of the one-effect evaporator (3) and the two-effect evaporator (5) is connected with the water inlet of the primary condensate water tank (12) through a pipeline, the exhaust outlet of the one-effect separator (4) is connected with the hot material channel inlet of the second preheater (10) and the steam inlet of the upper portion of the two-effect evaporator (5) through a pipeline, the hot material channel outlet of the second preheater (10) is connected with the steam inlet of the middle portion of the two-effect evaporator (5), the exhaust outlet of the two-effect separator (6) is connected with the hot material channel inlet of the first preheater (11) and the steam inlet of the three-effect crystallizer (7) through a pipeline, and the hot material channel outlet of the first preheater (11) is connected with the water inlet of the secondary condensate water tank (13) through a pipeline; the exhaust outlets of the one-effect evaporator (3), the two-effect evaporator (5), the three-effect crystallizer (7), the second preheater (10), the first preheater (11) and the secondary condensate water tank (13) are connected with the gas inlet of the primary condenser (8) through pipelines, the primary condenser (8) is provided with a water inlet and a backwater outlet connected with a circulating water inlet pipeline and a circulating water return pipeline respectively, the exhaust outlet of the primary condenser (8) is connected with the gas inlet of the secondary condenser (9) through a pipeline, the bottom of the secondary condenser (9) is provided with a water inlet and a backwater outlet connected with a cold water inlet pipeline and a cold water return pipeline respectively, the condensate water outlet of the secondary condenser (9) is connected with the water inlet of the secondary condensate water tank (13), and the exhaust outlet of the secondary condenser (9) is connected with the vacuum pump (20), and the outlet of the vacuum pump (20) is connected with an exhaust pipeline.
2. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The top of the raw material tank (1) is also provided with a back material opening connected with the material discharge opening of the material pump (18) through a pipeline.
3. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The bottom material discharge opening of the primary condensate water tank (12) is connected with the inlet of the primary condensate water pump (15) through a pipeline, and the outlet of the primary condensate water pump (15) is connected with the primary condensate water main pipeline through a pipeline.
4. The arginine triple-effect evaporative crystallization system of claim 3, wherein: The pipeline between the material pump (14) and the first preheater (11) passes through the hot material channel of the heat exchanger (2), and the outlet of the primary condensate water pump (15) is connected with the primary condensate water main pipeline through a pipeline passing through the hot material channel of the heat exchanger (2).
5. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The top material inlet of the one-effect evaporator (3) is connected with the material discharge opening of the one-effect material passing pump (16) through a pipeline, the top material inlet of the two-effect evaporator (5) is connected with the material discharge opening of the two-effect material passing pump (17) through a pipeline, and the lower material inlet of the three-effect crystallizer (7) is connected with the material discharge opening of the material pump (18) through a pipeline.
6. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The upper and lower parts of the one-effect evaporator (3) and the two-effect evaporator (5) are provided with exhaust ports and connected with the air inlet of the one-stage condenser (8) through pipes, the three-effect crystallizer (7) is provided with three exhaust ports at the top, middle and lower parts and connected with the air inlet of the one-stage condenser (8) through pipes, the upper and lower parts of the one-stage condenser (8) are provided with exhaust ports and connected with the inlet of the two-stage condenser (9) and the secondary condensate tank (13) through pipes, and the upper and lower parts of the two-stage condenser (9) are provided with exhaust ports and connected with the vacuum pump (20) through pipes.
7. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The sidewall of the raw material tank (1) and the bottom of the three-effect crystallizer (7) are provided with lower stirring paddles.
8. The arginine triple-effect evaporative crystallization system of claim 1, wherein: The bottom discharge port of the secondary condensate tank (13) is connected with the inlet of the secondary condensate pump (19) through a pipe, and the outlet of the secondary condensate pump (19) is connected with the secondary condensate main pipe and the inlet buffer tank coil through pipes respectively.
9. The arginine triple-effect evaporative crystallization system of claim 1, wherein: A water inlet pipe is further connected on the pipe between the feed pump (14) and the cold material channel of the first preheater (11).
10. The arginine triple-effect evaporative crystallization system of claim 1, wherein: Valves are arranged on the pipes in the evaporation crystallization system.