Seven-effect concentrated sugar system
The multi-effect evaporation and continuous heat exchange device of the seven-effect sugar concentration system solves the problems of high energy consumption and temperature difference in traditional sugar concentration devices, realizes a high-efficiency and environmentally friendly sugar concentration process, and improves production efficiency and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI RONGFENG BIO-ENG CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional sugar concentration devices consume large amounts of steam and experience large temperature fluctuations, which can destroy nutrients and affect microbial fermentation and sugar utilization.
The seven-effect sugar concentration system combines a multi-effect evaporator with a continuous heat exchanger to achieve efficient steam recovery and deep heat recovery of condensate, gradually control the raw material temperature, reduce steam consumption, and lower the temperature difference.
It significantly improves thermal energy utilization efficiency, reduces production costs, enhances system stability, increases sugar solution processing efficiency, avoids nutrient loss, creates favorable conditions for microbial fermentation, and has environmental protection and energy-saving effects.
Smart Images
Figure CN224113302U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of deep grain processing technology, and in particular to a seven-effect concentrated sugar system. Background Technology
[0002] In recent years, with the relaxation of national restrictions on corn deep processing approvals, lower sugar prices, and advancements in biotechnology, my country's starch sugar production has continued to rise. As consumer demand for healthy and environmentally friendly foods increases, the market demand for high-value-added biotechnology products will continue to grow. In the field of grain deep processing, the process of converting starch into sugar, further concentrating and storing the sugar solution, and subsequently carrying out bio-fermentation to produce high-value-added products has formed a relatively complete and continuously developing industrial chain.
[0003] Sugar concentration equipment plays a crucial role in the starch deep processing industry; however, this equipment faces several challenges in practical application. Firstly, the sugar solution undergoes high-temperature treatment during concentration, and traditional sugar concentration devices experience significant temperature fluctuations, leading to the destruction of many nutrients in the sugar solution and consequently affecting microbial fermentation and sugar utilization. Secondly, traditional sugar concentration devices consume a large amount of steam, which not only increases production costs but also potentially impacts system stability due to steam fluctuations. These issues limit the efficiency and effectiveness of sugar concentration equipment in the starch deep processing industry, necessitating continuous exploration and improvement by industry professionals.
[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a seven-effect concentrated sugar 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 a seven-effect sugar concentration system to solve the problems of large steam consumption and large temperature fluctuations during the concentration process in traditional sugar concentration devices, which lead to the destruction of a large number of nutrients.
[0007] This utility model discloses a seven-effect sugar concentration system, comprising a raw material processing and conveying channel consisting of a feed pump, a seven-effect evaporator, a seven-effect separator, a seven-effect discharge pump, a six-effect evaporator, a six-effect separator, a six-effect discharge pump, a five-effect evaporator, a five-effect separator, a five-effect discharge pump, a four-effect evaporator, a four-effect separator, a four-effect discharge pump, a three-effect evaporator, a three-effect separator, a three-effect discharge pump, a two-effect evaporator, a two-effect separator, a two-effect discharge pump, a one-effect evaporator, a one-effect separator, and a one-effect discharge pump connected in series via pipelines; wherein, the seven-effect evaporator... The discharge port of the evaporator is connected to the inlet of the 7-effect discharge pump; the discharge port of the 6-effect evaporator is connected to the inlet of the 6-effect discharge pump; the discharge port of the 5-effect evaporator is connected to the inlet of the 5-effect discharge pump; the discharge port of the 4-effect evaporator is connected to the inlet of the 4-effect discharge pump; the discharge port of the 3-effect evaporator is connected to the inlet of the 3-effect discharge pump; the discharge port of the 2-effect evaporator is connected to the inlet of the 2-effect discharge pump; the discharge port of the 1-effect evaporator is connected to the inlet of the 1-effect discharge pump; the discharge port of the 1-effect discharge pump is connected to the discharge pipe; and the inlet of the feed pump is connected to the feed pipe. This allows for the step-by-step transport and processing of raw materials, improving the controllability of raw material processing.
[0008] The steam inlet of the first-effect evaporator is connected to the steam inlet pipe. The top exhaust port of the first-effect separator is connected to the steam inlet of the second-effect evaporator. The top exhaust port of the second-effect separator is connected to the steam inlet of the third-effect evaporator. The top exhaust port of the third-effect separator is connected to the steam inlet of the fourth-effect evaporator. The top exhaust port of the fourth-effect separator is connected to the steam inlet of the fifth-effect evaporator. The top exhaust port of the fifth-effect separator is connected to the steam inlet of the sixth-effect evaporator. The top exhaust port of the sixth-effect separator is connected to the steam inlet of the seventh-effect evaporator. The top exhaust port of the seventh-effect separator is connected to the steam inlet of the surface condenser. The exhaust port of the surface condenser is connected to the vacuum pump via a pipe. High-temperature steam input from the steam inlet pipe is transported from the raw material processing conveying channel in the opposite direction to the raw material, causing the temperature of the raw material to gradually increase during processing.
[0009] The pipe between the fourth-effect discharge pump and the third-effect evaporator passes through the cold material channel of the first heat exchanger; the pipe between the fifth-effect discharge pump and the fourth-effect evaporator passes through the cold material channel of the second heat exchanger; the pipe between the sixth-effect discharge pump and the fifth-effect evaporator passes through the cold material channel of the third heat exchanger; the pipe between the seventh-effect discharge pump and the sixth-effect evaporator passes through the cold material channel of the fourth heat exchanger; the lower condensate outlets of the first, second, third, fourth, fifth, and sixth-effect evaporators are all connected to the first condensate tank through pipes; the lower drain outlet of the first condensate tank is connected to the inlet of the first condensate pump through pipes; and the drain outlet of the first condensate pump passes through the hot material channels of the first, second, third, and fourth heat exchangers through pipes. Because the condensate discharged from the first-effect, second-effect, third-effect, fourth-effect, fifth-effect, and sixth-effect evaporators is at a relatively high temperature, and the raw material temperature inside the third-effect, fourth-effect, fifth-effect, and sixth-effect evaporators is relatively low, the raw material entering them is continuously heated by a heat exchanger to reduce the temperature difference between the raw materials in different evaporators, thereby preventing the destruction of the nutrients in the raw materials.
[0010] The lower condensate outlets of the seven-effect evaporator and the surface condenser are connected to a second condensate tank via pipes, through which the condensate discharged from the seven-effect evaporator and the surface condenser is collected.
[0011] Preferred technical solution: The bottom of the surface condenser is provided with an inlet and an outlet, which are respectively connected to the circulating water inlet pipe and the circulating water return pipe, so that the cooling effect of the surface condenser is more stable.
[0012] Preferred technical solution: The lower drain of the second condensate tank is connected to the inlet of the second condensate pump through a pipe. The second condensate pump draws out the condensate in the second condensate tank, reducing the pressure inside the second condensate tank and making it easier for the condensate generated in the system to enter the second condensate tank.
[0013] Preferred technical solution: The drain outlets of both the first and second condensate pumps are connected to an external condensate recovery device through pipes, which saves water resources and avoids environmental pollution.
[0014] Preferred technical solution: The pipeline between the feed pump and the seven-effect evaporator passes through the cold material channel of the fifth heat exchanger, and the discharge pipe passes through the hot material channel of the fifth heat exchanger, which increases the initial temperature of the incoming raw material and cools the discharged raw material at the same time, thereby improving the utilization rate of heat exchange.
[0015] Preferred technical solution: Valves are installed on the pipelines in the seven-effect concentrated sugar system, which allows for flexible control of the system.
[0016] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:
[0017] This invention discloses a seven-effect sugar concentration system, designed to optimize the current sugar concentration process. By cleverly combining a multi-effect evaporator and a continuous heat exchanger, this invention achieves efficient recovery and utilization of secondary steam within the system, and deeply recovers and utilizes the heat energy of the steam condensate, thereby greatly improving heat energy utilization efficiency and reducing production costs. Simultaneously, the system preheats cold materials, reducing the temperature difference during material evaporation and concentration, significantly enhancing system stability. Using this seven-effect sugar concentration system for sugar concentration not only significantly reduces steam consumption but also significantly improves sugar solution processing efficiency, effectively mitigating temperature fluctuations during concentration processing, preventing the destruction of nutritional components in the sugar solution, and creating more favorable conditions for microbial fermentation and cultivation. Furthermore, the system's recovery and utilization of steam condensate not only embodies the concept of environmental protection and energy conservation but also further enhances the overall economic benefits of the production process. Its simple operation, excellent production efficiency, and ease of automation make it particularly suitable for large-scale production applications, demonstrating a strong competitive advantage. Attached Figure Description
[0018] 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.
[0019] Figure 1 This is a schematic diagram of the structure of a seven-effect concentrated sugar system according to the present invention.
[0020] In the attached diagrams above, 100 is the feed pipe; 101 is the discharge pipe; 102 is the steam inlet pipe; 103 is the circulating water inlet pipe; 104 is the circulating water return pipe; 1 is the first-effect evaporator; 2 is the first-effect separator; 3 is the second-effect evaporator; 4 is the second-effect separator; 5 is the third-effect evaporator; 6 is the third-effect separator; 7 is the fourth-effect evaporator; 8 is the fourth-effect separator; 9 is the fifth-effect evaporator; 10 is the fifth-effect separator; 11 is the sixth-effect evaporator; 12 is the sixth-effect separator; 13 is the seventh-effect evaporator; 1 4. Seven-effect separator; 15. Surface condenser; 16. Heat exchanger; 17. Heat exchanger; 18. Heat exchanger; 19. Heat exchanger; 20. Heat exchanger; 21. Condensate tank; 22. Condensate tank; 23. Vacuum pump; 24. Feed pump; 25. First-effect discharge pump; 26. Second-effect discharge pump; 27. Third-effect discharge pump; 28. Fourth-effect discharge pump; 29. Fifth-effect discharge pump; 30. Sixth-effect discharge pump; 31. Seventh-effect discharge pump; 32. Condensate pump; 33. Condensate pump. Detailed Implementation
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] 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.
[0026] 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.
[0027] Example:
[0028] like Figure 1 As shown, this utility model discloses a seven-effect sugar concentration system, including a first-effect evaporator 1, a first-effect separator 2, a second-effect evaporator 3, a second-effect separator 4, a third-effect evaporator 5, a third-effect separator 6, a fourth-effect evaporator 7, a fourth-effect separator 8, a fifth-effect evaporator 9, a fifth-effect separator 10, a sixth-effect evaporator 11, a sixth-effect separator 12, a seventh-effect evaporator 13, a seventh-effect separator 14, a surface condenser 15, heat exchangers 16, 17, 18, 19, and 20, a condensate tank 21, a condensate tank 22, a vacuum pump 23, a feed pump 24, a first-effect discharge pump 25, a second-effect discharge pump 26, a third-effect discharge pump 27, a fourth-effect discharge pump 28, a fifth-effect discharge pump 29, a sixth-effect discharge pump 30, a seventh-effect discharge pump 31, a condensate pump 32, and a condensate pump 33. The main components of this utility model will be described in detail below:
[0029] like Figure 1 As shown, the feed pump 24, the seven-effect evaporator 13, the seven-effect separator 14, the seven-effect discharge pump 31, the six-effect evaporator 11, the six-effect separator 12, the six-effect discharge pump 30, the five-effect evaporator 9, the five-effect separator 10, the five-effect discharge pump 29, the four-effect evaporator 7, the four-effect separator 8, the four-effect discharge pump 28, the three-effect evaporator 5, the three-effect separator 6, the three-effect discharge pump 27, the two-effect evaporator 3, the two-effect separator 4, the two-effect discharge pump 26, the one-effect evaporator 1, the one-effect separator 2, and the one-effect discharge pump 25 are connected in series via pipelines to form a raw material processing and conveying channel; among them, the discharge port of the seven-effect evaporator 13 is connected to the inlet of the seven-effect discharge pump 31, and the six-effect evaporator... The discharge port of evaporator 11 is connected to the inlet of the six-effect discharge pump 30, the discharge port of the five-effect evaporator 9 is connected to the inlet of the five-effect discharge pump 29, the discharge port of the four-effect evaporator 7 is connected to the inlet of the four-effect discharge pump 28, the discharge port of the three-effect evaporator 5 is connected to the inlet of the three-effect discharge pump 27, the discharge port of the two-effect evaporator 3 is connected to the inlet of the two-effect discharge pump 26, the discharge port of the one-effect evaporator 1 is connected to the inlet of the one-effect discharge pump 25, the discharge port of the one-effect discharge pump 25 is connected to the discharge pipe 101, and the inlet of the feed pump 24 is connected to the feed pipe 100. This allows the raw material to be transported and processed in a progressive manner, facilitating the control of the processing process.
[0030] like Figure 1As shown, the steam inlet of the first-effect evaporator 1 is connected to the steam inlet pipe 102; the top exhaust port of the first-effect separator 2 is connected to the steam inlet of the second-effect evaporator 3; the top exhaust port of the second-effect separator 4 is connected to the steam inlet of the third-effect evaporator 5; the top exhaust port of the third-effect separator 6 is connected to the steam inlet of the fourth-effect evaporator 7; the top exhaust port of the fourth-effect separator 8 is connected to the steam inlet of the fifth-effect evaporator 9; the top exhaust port of the fifth-effect separator 10 is connected to the steam inlet of the sixth-effect evaporator 11; the top exhaust port of the sixth-effect separator 12 is connected to the steam inlet of the seventh-effect evaporator 13; the top exhaust port of the seventh-effect separator 14 is connected to the steam inlet of the surface condenser 15; and the exhaust port of the surface condenser 15 is connected to the vacuum pump 23 through a pipe, so that the steam flow direction is opposite to the raw material flow direction, so that the concentration temperature of the raw material gradually increases during the processing.
[0031] like Figure 1 As shown, the pipe between the fourth-effect discharge pump 28 and the third-effect evaporator 5 passes through the cold material channel of the first heat exchanger 16; the pipe between the fifth-effect discharge pump 29 and the fourth-effect evaporator 7 passes through the cold material channel of the second heat exchanger 17; the pipe between the sixth-effect discharge pump 30 and the fifth-effect evaporator 9 passes through the cold material channel of the third heat exchanger 18; the pipe between the seventh-effect discharge pump 31 and the sixth-effect evaporator 11 passes through the cold material channel of the fourth heat exchanger 19; and the pipes between the first-effect evaporator 1, the second-effect evaporator 3, the third-effect evaporator 5, the fourth-effect evaporator 7, and the fifth-effect evaporator 9... The lower condensate outlet of the six-effect evaporator 11 is connected to the first condensate tank 21 through a pipe. The lower drain outlet of the first condensate tank 21 is connected to the inlet of the first condensate pump 32 through a pipe. The drain outlet of the first condensate pump 32 passes through the hot material channels of the first heat exchanger 16, the second heat exchanger 17, the third heat exchanger 18 and the fourth heat exchanger 19 through pipes respectively. The condensate condensed in the evaporator is used to continuously exchange heat with the raw material, reduce the temperature difference of raw material concentration between the evaporators and avoid damaging the nutrients in the raw material.
[0032] like Figure 1 As shown, the lower condensate outlets of the seven-effect evaporator 13 and the surface condenser 15 are connected to the second condensate tank 22 via pipes. Since the condensate discharged from the seven-effect evaporator 13 and the surface condenser 15 has low internal heat energy, it is collected separately.
[0033] refer to Figure 1As shown, the usage method and principle of this utility model are as follows: By setting up a first-effect evaporator 1, a second-effect evaporator 3, a third-effect evaporator 5, a fourth-effect evaporator 7, a fifth-effect evaporator 9, a sixth-effect evaporator 11, and a seventh-effect evaporator 13, the raw material is continuously evaporated and concentrated. The high-temperature steam entering the system is in the opposite direction to the raw material transport, thus gradually increasing the concentration effect of the raw material as processing progresses. The secondary steam within the system is fully utilized efficiently. The condensate recovered from the first-effect evaporator 1, second-effect evaporator 3, third-effect evaporator 5, fourth-effect evaporator 7, fifth-effect evaporator 9, and sixth-effect evaporator 11 is used for continuous heat exchange with the raw material. The heat energy of the steam condensate further reduces the temperature difference of the raw material in different evaporators, thereby reducing the possibility of damage to the nutrients in the raw material, improving processing efficiency, and reducing energy consumption.
[0034] Furthermore, to ensure a more stable cooling effect, the bottom of the surface condenser 15 is provided with a water inlet and a water return outlet, which are respectively connected to the circulating water inlet pipe 103 and the circulating water return pipe 104.
[0035] Furthermore, to facilitate the collection of condensate, the lower drain outlet of the second condensate tank 22 is connected to the inlet of the second condensate pump 33 through a pipe. The second condensate pump 33 extracts the condensate from the second condensate tank 22, reducing the pressure inside the second condensate tank 22 and making it easier for the condensate generated in the system to enter the second condensate tank 22.
[0036] Furthermore, in order to save water resources and avoid environmental pollution, the drain outlets of the first condensate pump 32 and the second condensate pump 33 are all connected to an external condensate recovery device through pipes.
[0037] Furthermore, to improve the utilization rate of heat exchange, the pipeline between the feed pump 24 and the seven-effect evaporator 13 passes through the cold material channel of the fifth heat exchanger 20, and the discharge pipe 101 passes through the hot material channel of the fifth heat exchanger 20.
[0038] Furthermore, to facilitate flexible control of the system, valves are installed on all the pipes in the seven-effect concentrated sugar system.
[0039] 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. A seven-effect concentrated sugar system, characterized in that: This includes a raw material processing and conveying channel consisting of a feed pump (24), a seven-effect evaporator (13), a seven-effect separator (14), a seven-effect discharge pump (31), a six-effect evaporator (11), a six-effect separator (12), a six-effect discharge pump (30), a five-effect evaporator (9), a five-effect separator (10), a five-effect discharge pump (29), a four-effect evaporator (7), a four-effect separator (8), a four-effect discharge pump (28), a three-effect evaporator (5), a three-effect separator (6), a three-effect discharge pump (27), a two-effect evaporator (3), a two-effect separator (4), a two-effect discharge pump (26), a one-effect evaporator (1), a one-effect separator (2), and a one-effect discharge pump (25) connected in series via pipelines; wherein, the discharge port of the seven-effect evaporator (13) is connected to the discharge port of the seven-effect discharge pump (31). 1) The inlet of the evaporator is connected to the discharge port of the 6th-effect evaporator (11) and the inlet of the 6th-effect discharge pump (30). The discharge port of the 5th-effect evaporator (9) is connected to the inlet of the 5th-effect discharge pump (29). The discharge port of the 4th-effect evaporator (7) is connected to the inlet of the 4th-effect discharge pump (28). The discharge port of the 3rd-effect evaporator (5) is connected to the inlet of the 3rd-effect discharge pump (27). The discharge port of the 2nd-effect evaporator (3) is connected to the inlet of the 2nd-effect discharge pump (26). The discharge port of the 1st-effect evaporator (1) is connected to the inlet of the 1st-effect discharge pump (25). The discharge port of the 1st-effect discharge pump (25) is connected to the discharge pipe (101). The inlet of the feed pump (24) is connected to the feed pipe (100). The steam inlet of the first-effect evaporator (1) is connected to the steam inlet pipe (102), the top exhaust port of the first-effect separator (2) is connected to the steam inlet of the second-effect evaporator (3), the top exhaust port of the second-effect separator (4) is connected to the steam inlet of the third-effect evaporator (5), the top exhaust port of the third-effect separator (6) is connected to the steam inlet of the fourth-effect evaporator (7), the top exhaust port of the fourth-effect separator (8) is connected to the steam inlet of the fifth-effect evaporator (9), the top exhaust port of the fifth-effect separator (10) is connected to the steam inlet of the sixth-effect evaporator (11), the top exhaust port of the sixth-effect separator (12) is connected to the steam inlet of the seventh-effect evaporator (13), the top exhaust port of the seventh-effect separator (14) is connected to the steam inlet of the surface condenser (15), and the exhaust port of the surface condenser (15) is connected to the vacuum pump (23) through a pipe. The pipe between the four-effect discharge pump (28) and the three-effect evaporator (5) passes through the cold material channel of the first heat exchanger (16); the pipe between the five-effect discharge pump (29) and the four-effect evaporator (7) passes through the cold material channel of the second heat exchanger (17); the pipe between the six-effect discharge pump (30) and the five-effect evaporator (9) passes through the cold material channel of the third heat exchanger (18); the pipe between the seven-effect discharge pump (31) and the six-effect evaporator (11) passes through the cold material channel of the fourth heat exchanger (19); the pipe between the first-effect evaporator (1) and the second-effect evaporator (28) passes through the cold material channel of the third heat exchanger (18); The lower condensate outlets of the evaporator (3), the triple-effect evaporator (5), the quadruple-effect evaporator (7), the quintuple-effect evaporator (9), and the sixth-effect evaporator (11) are all connected to the first condensate tank (21) through pipes. The lower drain of the first condensate tank (21) is connected to the inlet of the first condensate pump (32) through pipes. The drain of the first condensate pump (32) passes through the hot material channels of the first heat exchanger (16), the second heat exchanger (17), the third heat exchanger (18), and the fourth heat exchanger (19) through pipes respectively. The lower condensate outlets of the seven-effect evaporator (13) and the surface condenser (15) are connected to the second condensate tank (22) via pipes.
2. The seven-effect concentrated sugar system according to claim 1, characterized in that: The surface condenser (15) has an inlet and a return outlet at the bottom, which are respectively connected to the circulating water inlet pipe (103) and the circulating water return pipe (104).
3. The seven-effect concentrated sugar system according to claim 1, characterized in that: The lower drain of the second condensate tank (22) is connected to the inlet of the second condensate pump (33) via a pipe.
4. The seven-effect concentrated sugar system according to claim 3, characterized in that: The drain outlets of the first condensate pump (32) and the second condensate pump (33) are all connected to an external condensate recovery device through pipes.
5. The seven-effect concentrated sugar system according to claim 1, characterized in that: The pipeline between the feed pump (24) and the seven-effect evaporator (13) passes through the cold material channel of the fifth heat exchanger (20), and the discharge pipe (101) passes through the hot material channel of the fifth heat exchanger (20).
6. The seven-effect concentrated sugar system according to claim 1, characterized in that: Valves are installed on all the pipes in the seven-effect concentrated sugar system.