Tomato multi-effect body combined concentration production device based on MVR pre-evaporation system

Abstract

The utility model relates to the technical field of food processing, and discloses a tomato multi-effect body combined concentration production device based on an MVR (mechanical vapor recompression) pre-evaporation system, which comprises MVR pre-evaporation equipment, a first concentration production line, a second concentration production line and a third concentration production line, the MVR pre-evaporation equipment comprises a preheater, a mechanical compressor, a discharge pump and a circulating pump; the first concentration production line, the second concentration production line and the third concentration production line are respectively connected with the material distribution pipeline. The MVR pre-evaporation equipment can be effectively combined with the first concentration production line, the second concentration production line and the third concentration production line at the same time, so that the three production lines are fully utilized, tomato juice is primarily concentrated through the MVR pre-evaporation equipment and is distributed to the three concentration production lines through the material distribution pipeline, and the production efficiency is improved. The evaporation concentration time of the first concentration production line, the second concentration production line and the third concentration production line can be effectively shortened, steam consumption is reduced, and the production efficiency is improved.

Description

A tomato multi-effect combined concentration production device based on MVR pre-evaporation system Technical Field

[0001] This utility model relates to the field of food processing technology, specifically to a tomato multi-effects combined concentration production device based on an MVR pre-evaporation system. Background Technology

[0002] Tomatoes are annual herbaceous plants belonging to the Solanaceae family and the Solanum genus. Tomato fruits are rich in carotene, vitamin C, and B vitamins, making them highly nutritious. They can be eaten as both a vegetable and a fruit, both raw and cooked, and are therefore very popular with consumers.

[0003] Currently, to further facilitate the transportation of tomatoes and meet different usage needs, related fields have developed deep processing methods for tomatoes. These deep-processed tomato products mainly include tomato paste, tomato juice, tomato powder, and lycopene. Among them, tomato paste is a concentrated sauce-like product of fresh tomatoes. The main processing principle is that after the tomato raw materials are sorted, washed, blanched, peeled, and pulped, the pulped tomato paste is immediately heated and concentrated. This can prevent the pectinase from causing stratification and avoid the tomato paste from being too thin, which would affect its flavor and taste.

[0004] However, existing technologies for heating tomato paste mostly use a single heater for direct heating. Although this can achieve the production goal, the existing heaters cannot further utilize the heat energy of the steam discharged during the heating process, resulting in a high heat energy waste rate for the overall equipment. This also limits the upper limit of the overall equipment's operating efficiency and is not conducive to optimizing and improving production capacity. Therefore, in order to address the problems existing in the above-mentioned existing technologies, this application will provide a tomato multi-effect combined concentration production device based on an MVR pre-evaporation system. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a tomato multi-effect combined concentration production device based on an MVR pre-evaporation system, which solves the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a tomato multi-effect combined concentration production device based on an MVR pre-evaporation system, including an MVR pre-evaporation device, a first concentration production line, a second concentration production line, and a third concentration production line. The MVR pre-evaporation device includes a material inlet, a preheater, a circulating pump, a circulating valve assembly, a material concentration detection pipe, a material concentration detector, a discharge pump, a material distribution pipe, a mechanical compressor, a steam output valve assembly, a fresh steam replenishment pipe, and a steam return valve. The preheater is provided with a material inlet. The inlet of the circulating pump is connected to the outlet end at the bottom of the preheater. The outlet of the circulating pump is connected to the circulating valve assembly. The circulating valve assembly is connected to the material inlet end at the top of the preheater. The inlet end of the material concentration detection pipe is connected to the discharge pipe at the bottom of the preheater. The outlet end of the material concentration detection pipe is connected to the inlet end of the circulating valve assembly. The material concentration detector is fixed in the middle of the material concentration detection pipe.

[0007] The input end of the discharge pump extends into the preheater and is connected to a material distribution pipe at the output end of the discharge pump. The output port of the material distribution pipe is configured to have several output ports.

[0008] A steam return valve pipe is installed between the preheater and the mechanical compressor. This steam return valve pipe is installed at the input port of the mechanical compressor, which is connected to the inlet end of the steam output valve pipe assembly. The outlet end of the fresh steam replenishment pipe is also connected to the inlet end of the steam output valve pipe assembly. The mechanical compressor can recover the secondary steam generated by the preheater through the steam return valve pipe; it then circulates, pressurizes, and heats the steam before sending it back to the preheater via the steam output valve pipe assembly.

[0009] Preferably, the preheater is equipped with a temperature sensor capable of detecting the temperature of the tomato raw material, and a pressure sensor is installed in the area of ​​the preheater that is not in contact with the raw material.

[0010] Specifically, the outer surfaces of the steam output valve pipe assembly and the steam return valve pipe are both covered with a first heat insulation protective sleeve to reduce the amount of heat loss during the steam output valve pipe assembly's steam delivery process.

[0011] Specifically, the preheater is equipped with a circulating pump and a circulating valve assembly. The input end of the circulating pump is connected to the preheater and communicates with the internal space of the preheater. The two ends of the circulating valve assembly are respectively connected to the output end of the circulating pump and fitted inside the preheater. The circulating pump and the circulating valve assembly work together to circulate the tomato sauce inside the preheater, thereby improving the uniformity and efficiency of subsequent preheating.

[0012] Selectedly, one end of the circulating valve tube assembly is fitted inside the top of the preheater and has clearance space between it and the storage space inside the preheater, providing sufficient clearance space for subsequent expansion of circulating bulk materials.

[0013] Preferably, one end of the circulating valve pipe assembly is connected to a nozzle, and the nozzle is provided with several diversion ports facing the storage space inside the preheater. The outer surface of the circulating valve pipe assembly located between the preheater and the circulating pump is wrapped with a second heat insulation protective sleeve, thereby reducing the heat dissipated from the processing environment by the circulating valve pipe assembly itself during the material conveying process.

[0014] Preferably, the material distribution pipeline has three output ports, and each of the three output ports is equipped with a regulating valve. The three output ports are respectively connected to the first concentration production line, the second concentration production line, and the third concentration production line, and the output structures of the first concentration production line and the third concentration production line can be connected to the second concentration production line.

[0015] Specifically, the first concentration production line includes a first-line triple-effect evaporator, a first-line double-effect evaporator, a first-line single-effect evaporator, a first-line discharge pipeline, a first-line filling valve assembly, and a first-line discharge valve assembly. First pumping devices are installed between the first-line triple-effect evaporator and the first-line double-effect evaporator, between the first-line double-effect evaporator and the first-line single-effect evaporator, and between the first-line single-effect evaporator and the first-line discharge pipeline. The input end of the first-line triple-effect evaporator is connected to a corresponding output port within the material distribution pipeline. The output structure of the first-line pumping device between the first-line single-effect evaporator and the first-line discharge pipeline is equipped with a first-line filling valve assembly and a first-line discharge valve assembly for direct flow diversion. The output end of the first-line discharge valve assembly serves as the overall output structure of the first concentration production line, giving the first concentration production line the structural conditions for independent use.

[0016] Specifically, the third concentration production line includes a third-line double-effect evaporator, a third-line single-effect evaporator, and a third-line discharge valve assembly. Two pumping devices are installed between the third-line double-effect evaporator and the third-line single-effect evaporator, and between the third-line single-effect evaporator and the third-line discharge valve assembly. The input end of the third-line double-effect evaporator is connected to a corresponding output port in the material distribution pipeline. The output end of the third-line discharge valve assembly serves as the overall output structure of the third concentration production line.

[0017] Specifically, the second concentration production line includes a second-line triple-effect evaporator, a second-line double-effect evaporator, a second-line first-effect stage evaporator, a first-effect stage evaporator, and a second-line filling valve assembly. The input end of the second-line triple-effect evaporator is connected to an output port corresponding to the material distribution pipeline. Two pumping devices are installed between the second-line triple-effect evaporator and the second-line double-effect evaporator, between the second-line double-effect evaporator and the second-line first-effect stage evaporator, and between the second-line first-effect stage evaporator and the second-line first-effect stage evaporator. The second-line filling valve assembly is installed on the output end of the second-line first-effect stage evaporator. The output ends of the third-line discharge valve assembly and the first-line discharge valve assembly can both extend to the upper end of the circulation pump input end of the second-line first-effect stage evaporator. This allows the first, second, and third concentration production lines to be used in a unified and efficient manner, making full use of idle equipment, effectively shortening the concentration time of the three evaporation processes, and thus effectively releasing production capacity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the MVR pre-evaporation equipment of this utility model is used in combination with the first concentration production line, the second concentration production line, and the third concentration production line, it can effectively combine with the first concentration production line, the second concentration production line, and the third concentration production line while realizing its own MVR process operation. This allows the first concentration production line, the second concentration production line, and the third concentration production line to be fully utilized. At the same time, since the MVR pre-evaporation equipment can significantly increase the concentration of tomato juice through preheating, it can effectively shorten the evaporation and concentration time of the first concentration production line, the second concentration production line, and the third concentration production line, thereby effectively releasing the overall capacity of the equipment.

[0020] 2. The MVR pre-evaporation equipment of this utility model can pressurize and heat the preheated steam through mechanical compression of the mechanical compressor during operation, thereby steadily increasing the temperature of the secondary steam generated by the preheater from the original 60-65℃ to 70-78℃. Then, after the heated steam is sent back to the preheater through the steam output valve pipe assembly, it can circulate and exchange heat energy with the tomato juice inside the preheater, effectively increasing the tomato juice concentration from 5 Brix to 7-9 Brix, successfully achieving the optimized and improved effect of steam heat energy recycling, and solving the problems existing in the prior art.

[0021] 3. The MVR pre-evaporation equipment of this utility model has a circulating pump and circulating valve pipe assembly inside that can circulate the tomato juice inside the preheater during the preheating process of the whole equipment, increase the contact area between the tomato juice and the secondary steam, improve the heat transfer efficiency, and also improve the uniform heating effect of the tomato juice during the preheating process. Attached Figure Description

[0022] Figure 1 is a front view schematic diagram of the structure of this utility model;

[0023] Figure 2 is an enlarged schematic diagram of the MVR pre-evaporation device of this utility model.

[0024] In the diagram: 100, MVR pre-evaporation equipment; 101, material inlet; 102, preheater; 103, circulating pump; 104, circulating valve assembly; 105, material concentration detection pipeline; 106, material concentration detector; 107, discharge pump; 108, material distribution pipeline; 109, mechanical compressor; 110, steam output valve assembly; 111, fresh steam replenishment pipeline; 112, steam reflux valve; 200, first concentration production line; 201, first line triple-effect evaporator; 202, first line double-effect evaporator; 2 03. First-line single-effect evaporator; 204. First-line discharge pipeline; 205. First-line filling valve assembly; 206. First-line discharge valve assembly; 300. Second concentration production line; 301. Second-line triple-effect evaporator; 302. Second-line double-effect evaporator; 303. Second-line single-effect single-stage evaporator; 304. Single-effect double-stage evaporator; 305. Second-line filling valve assembly; 400. Third concentration production line; 401. Third-line double-effect evaporator; 402. Third-line single-effect evaporator; 403. Third-line discharge valve assembly. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please refer to Figure 2. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system includes a preheater 102, a mechanical compressor 109, and a discharge pump 107. The preheater 102 is equipped with a temperature sensor capable of detecting the temperature of the tomato raw material, and a pressure sensor is installed in the area of ​​the preheater 102 that is not in contact with the raw material. The preheater 102 is equipped with a material inlet valve pipe 101. The input end of the discharge pump 107 extends into the interior of the preheater 102 and is fitted therein. The output end of the discharge pump 107 is connected to a material distribution pipe 108, and the output port of the material distribution pipe 108 is configured to have several ports.

[0028] A steam return valve pipe 112 is provided between the preheater 102 and the mechanical compressor 109. The steam return valve pipe 112 is installed at the input port of the mechanical compressor 109, which is connected to the inlet end of the steam output valve pipe assembly 110. The outlet end of the fresh steam replenishment pipe 111 is connected to the inlet end of the steam output valve pipe assembly 110. The mechanical compressor 109 can recover the secondary steam generated by the preheater 102 through the steam return valve pipe 112; it circulates, pressurizes, and heats the steam, and then sends it back to the preheater 102 through the steam output valve pipe assembly 110. The outer surfaces of both the steam output valve pipe assembly 110 and the steam return valve pipe 112 are covered with a first heat-insulating protective sleeve to reduce heat loss during steam transportation.

[0029] In the specific implementation process:

[0030] Tomato juice enters the preheater 102 through the material inlet valve 101. The preheater 102 is activated to preheat the tomato raw material. During this process, the secondary steam generated inside the preheater 102 due to heating enters the mechanical compressor 109 through the steam return valve 112. Then, the mechanical compressor 109 mechanically compresses and heats the recovered steam, steadily increasing its temperature from the original 60-65℃ to 70-78℃. After completion, the secondary-processed steam returns to the preheater 102 through the steam output valve assembly 110, further circulating and assisting in the heating of the tomato juice inside the preheater 102, effectively improving the preheating effect and recycling the heat energy in the steam.

[0031] Example 2

[0032] Please refer to Figure 2. A circulation pump 103 and a circulation valve assembly 104 are provided outside the preheater 102. The input end of the circulation pump 103 is connected to the preheater 102 and communicates with the internal space of the preheater 102. The two ends of the circulation valve assembly 104 are connected to the output end of the circulation pump 103 and are fitted inside the preheater 102. The circulation pump 103 and the circulation valve assembly 104 work together to circulate the tomato sauce inside the preheater 102, thereby improving the uniformity and efficiency of subsequent preheating. One end of the circulation valve assembly 104 is fitted inside the top of the preheater 102 and there is clearance space between it and the storage space inside the preheater 102, thus providing sufficient clearance space for subsequent expansion of the circulating bulk material.

[0033] One end of the circulating valve pipe assembly 104 is connected to a nozzle, and the nozzle is provided with several diversion ports facing the storage space inside the preheater 102. This allows the circulating tomato sauce to expand fully, increasing the contact area between it and the secondary heating steam inside the preheater 102, thereby improving the heat transfer efficiency. The outer surface of the circulating valve pipe assembly 104 located between the preheater 102 and the circulating pump 103 is wrapped with a second heat insulation protective sleeve, thereby reducing the heat dissipated from the processing environment of the circulating valve pipe assembly 104 itself during the material conveying process.

[0034] In the specific implementation process:

[0035] Considering the efficiency of secondary steam recirculation heating and the uniformity of overall preheating, after one cycle in the above embodiment 1, the circulation pump 103 is activated. The circulation pump 103 pumps the tomato juice inside the preheater 102 through the circulation valve pipe assembly 104 to the top inner side of the preheater 102. Then, through the nozzle connected to the circulation valve pipe assembly 104, the tomato juice is dispersed in multiple streams into the top space of the first concentration production line 2. This increases the contact area between the circulating and dispersed tomato juice and the secondary steam, improves the efficiency of heat transfer, and in actual production, heating can also increase the tomato juice concentration from 5 Brix to 7-9 Brix.

[0036] Furthermore, as the tomato juice circulates within the first concentration production line 200 via internal pumps, the tomato juice will better receive preheating heat energy, achieving a uniform preheating production effect.

[0037] Example 3

[0038] Please refer to Figures 1-2. The material distribution pipeline 108 has three output ports, and each of the three output ports is equipped with a regulating valve. The three output ports are respectively connected to the first concentration production line 200, the second concentration production line 300, and the third concentration production line 400. The output structures of the first concentration production line 200 and the third concentration production line 400 can be connected to the second concentration production line 300. The first concentration production line 200 includes a first-line triple-effect evaporator 201, a first-line double-effect evaporator 202, a first-line single-effect evaporator 203, a first-line discharge pipeline 204, a first-line filling valve assembly 205, and a first-line discharge valve assembly 206. First pumping equipment is installed between the first-line triple-effect evaporator 201 and the first-line double-effect evaporator 202, between the first-line double-effect evaporator 202 and the first-line single-effect evaporator 203, and between the first-line single-effect evaporator 203 and the first-line discharge pipeline 204. The input end of the first-line triple-effect evaporator 201 is connected to a corresponding output port in the material distribution pipeline 108. The output structure of the first-line pumping equipment between the first-line single-effect evaporator 203 and the first-line discharge pipeline 204 is equipped with the first-line filling valve assembly 205 and the first-line discharge valve assembly 206 for direct flow diversion. The output end of the first-line discharge valve assembly 206 serves as the overall output structure of the first concentration production line 200.

[0039] The third concentration production line 400 includes a third-line double-effect evaporator 401, a third-line single-effect evaporator 402, and a third-line discharge valve assembly 403. Two pumping devices are installed between the third-line double-effect evaporator 401 and the third-line single-effect evaporator 402, and between the third-line single-effect evaporator 402 and the third-line discharge valve assembly 403. The input end of the third-line double-effect evaporator 401 is connected to a corresponding output port in the material distribution pipeline 108. The output end of the third-line discharge valve assembly 403 serves as the overall output structure of the third concentration production line 400.

[0040] The second concentration production line 300 includes a second-line triple-effect evaporator 301, a second-line double-effect evaporator 302, a second-line first-effect single-stage evaporator 303, a first-effect double-stage evaporator 304, and a second-line filling valve assembly 305. The input end of the second-line triple-effect evaporator 301 is connected to one output port corresponding to the material distribution pipeline 108. Furthermore, there are connections between the second-line triple-effect evaporator 301 and the second-line double-effect evaporator 302, between the second-line double-effect evaporator 302 and the second-line first-effect single-stage evaporator 303, and between the second-line first-effect single-stage evaporator 303 and the second-line first-effect double-stage evaporator 304. There are two pumping devices, and a second-line filling valve assembly 305 is installed on the output end of the second-line first-effect two-stage evaporator 304; the output ends of the third-line discharge valve assembly 403 and the first-line discharge valve assembly 206 can both be extended to the upper end of the circulation pump input end of the second-line first-effect one-stage evaporator 303, thereby enabling the first concentration production line 200, the second concentration production line 300 and the third concentration production line 400 to be used in a unified manner, thereby effectively combining them, making full use of idle equipment, effectively shortening the concentration time of the three evaporation processes, and thus effectively releasing production capacity.

[0041] In the specific implementation process:

[0042] Considering the needs of batch processing, the preheated tomato juice can be simultaneously conveyed to the first concentration production line 200, the second concentration production line 300, and the third concentration production line 400 through the material distribution pipe 108, as detailed below:

[0043] Tomato juice entering the first concentration production line 200 through one output port of the material distribution pipe 108 sequentially passes through the first-line triple-effect evaporator 201, the first-line double-effect evaporator 202, and the first-line single-effect evaporator 203, undergoing evaporation and concentration treatment in sequence. Similarly, tomato juice entering the third concentration production line 400 through one output port of the material distribution pipe 108 sequentially passes through the third-line double-effect evaporator 401, the third-line single-effect evaporator 402, and the third-line discharge valve assembly 403, undergoing evaporation and concentration treatment in sequence. Tomato juice entering the second concentration production line 300 through one output port of the material distribution pipe 108 sequentially passes through the second-line triple-effect evaporator 301, the second-line double-effect evaporator 302, the second-line single-effect evaporator 303, and the second-line single-effect evaporator 304, undergoing evaporation and concentration treatment in sequence. The third-line first-effect evaporator 402 and the first-line first-effect evaporator 203 serve as the discharge sections of their respective production lines, uniformly transporting the concentrated tomato juice to the second-line first-effect first-stage evaporator 303, where it participates in the evaporation and concentration of the second-line first-effect first-stage evaporator (303) and the second-line first-effect second-stage evaporator 304. Finally, the qualified finished tomato sauce is uniformly transported into the existing filling production line through the second-line filling valve assembly 305 to participate in subsequent filling production.

[0044] For small-batch production needs, the second concentration production line 300 and the third concentration production line 400 can be omitted; the first concentration production line 200 can suffice, as detailed below:

[0045] Tomato juice entering the first concentration production line 200 through one output port of the material distribution pipe 108 is sequentially evaporated and concentrated by the first line triple-effect evaporator 201, the first line double-effect evaporator 202, and the first line single-effect evaporator 203. The qualified concentrated tomato sauce is then transported into the existing filling production line through the first line filling valve assembly 205 to participate in subsequent filling production.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tomato multi-effect tomato co-concentration production device based on an MVR pre-evaporation system, comprising an MVR pre-evaporation unit (100), a first concentration production line (200), a second concentration production line (300), and a third concentration production line (400), characterized in that: The MVR pre-evaporation equipment (100) includes a material inlet (101), a preheater (102), a circulating pump (103), a circulating valve assembly (104), a material concentration detection pipeline (105), a material concentration detector (106), a discharge pump (107), a material distribution pipeline (108), a mechanical compressor (109), a steam output valve assembly (110), a fresh steam replenishment pipe (111), and a steam return valve (112); the preheater (102) is equipped with a material inlet (101). The inlet of the circulating pump (103) is connected to the outlet end at the bottom of the preheater, the outlet of the circulating pump (103) is connected to the circulating valve pipe assembly (104), the circulating valve pipe assembly (104) is connected to the material inlet end at the top of the preheater (102), the inlet end of the material concentration detection pipe (105) is connected to the discharge pipe at the bottom of the preheater (102), the outlet end of the material concentration detection pipe (105) is connected to the inlet end of the circulating valve pipe assembly (104), and the material concentration detector (106) is fixed in the middle of the material concentration detection pipe (105).

2. The tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: The input end of the discharge pump (107) extends into the preheater (102) and is fitted inside. The output end of the discharge pump (107) is connected to a material distribution pipe (108), and the output port of the material distribution pipe (108) is set to several.

3. The tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: A steam return valve pipe (112) is provided between the preheater (102) and the mechanical compressor (109). The steam return valve pipe (112) is installed at the input port of the mechanical compressor (109). The input port of the mechanical compressor (109) is connected to the inlet end of the steam output valve pipe assembly (110). The outlet end of the fresh steam replenishment pipe (111) is connected to the inlet end of the steam output valve pipe assembly (110). The mechanical compressor (109) recovers the secondary steam generated by the preheater (102) through the steam return valve pipe (112). The secondary steam is circulated, pressurized, and heated by the mechanical compressor (109), and then sent back to the preheater (102) by the steam output valve pipe assembly (110).

4. The tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: The preheater (102) is equipped with a temperature sensor that can detect the temperature of tomato raw materials, and a pressure sensor is installed in the area of ​​the preheater (102) that is not in contact with the raw materials.

5. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: The outer surfaces of the steam output valve assembly (110) and the steam return valve (112) are both covered with a first heat-insulating protective sleeve.

6. The tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: One end of the circulating valve pipe assembly (104) is fitted inside the top of the preheater (102) and there is clearance space between it and the storage space inside the preheater (102). One end of the circulating valve pipe assembly (104) is connected to a nozzle, and the nozzle is provided with several diversion ports facing the storage space inside the preheater (102). The outer surface of the structure of the circulating valve pipe assembly (104) located between the preheater (102) and the circulating pump (103) is wrapped with a second heat insulation protective sleeve.

7. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 1, characterized in that: The material distribution pipeline (108) has three output ports, and each of the three output ports is equipped with a regulating valve. The three output ports are respectively connected to the first concentration production line (200), the second concentration production line (300), and the third concentration production line (400). The output structures of the first concentration production line (200) and the third concentration production line (400) are both connected to the second concentration production line (300).

8. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 7, characterized in that: The first concentration production line (200) includes a first-line triple-effect evaporator (201), a first-line double-effect evaporator (202), a first-line single-effect evaporator (203), a first-line discharge pipeline (204), a first-line filling valve assembly (205), and a first-line discharge valve assembly (206). Furthermore, the first-line triple-effect evaporator (201) is connected to the first-line double-effect evaporator (202), the first-line double-effect evaporator (202) is connected to the first-line single-effect evaporator (203), and the first-line single-effect evaporator (203) is connected to the first-line discharge pipeline. A first pumping device is provided between each of (204), and the input end of the first line triple-effect evaporator (201) is connected to a corresponding output port in the material distribution pipeline (108). The output structure of the first line pumping device between the first line single-effect evaporator (203) and the first line discharge pipeline (204) is equipped with a first line filling valve assembly (205) and a first line discharge valve assembly (206) for direct diversion. The output end of the first line discharge valve assembly (206) serves as the output structure of the first concentration production line (200) as a whole.

9. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 7, characterized in that: The third concentration production line (400) includes a third-line double-effect evaporator (401), a third-line single-effect evaporator (402), and a third-line discharge valve assembly (403). Two pumping devices are installed between the third-line double-effect evaporator (401) and the third-line single-effect evaporator (402), and between the third-line single-effect evaporator (402) and the third-line discharge valve assembly (403). The input end of the third-line double-effect evaporator (401) is connected to a corresponding output port in the material distribution pipeline (108). The output end of the third-line discharge valve assembly (403) serves as the overall output structure of the third concentration production line (400).

10. A tomato multi-effect combined concentration production device based on an MVR pre-evaporation system according to claim 9, characterized in that: The second concentration production line (300) includes a second-line triple-effect evaporator (301), a second-line double-effect evaporator (302), a second-line single-effect evaporator (303), a second-line single-effect evaporator (304), and a second-line filling valve assembly (305). The input end of the second-line triple-effect evaporator (301) is connected to a corresponding output port of the material distribution pipeline (108), and the second-line triple-effect evaporator (301) and the second-line double-effect evaporator (302) are connected to each other. 2) Two pumping devices are installed between the second line first-effect first-stage evaporator (303) and between the second line first-effect first-stage evaporator (303) and the second line first-effect second-stage evaporator (304). A second-line filling valve pipe assembly (305) is installed on the output end of the second line first-effect second-stage evaporator (304). The output end of the third-line discharge valve pipe assembly (403) and the output end of the first-line discharge valve pipe assembly (206) can both be extended to the upper end of the circulation pump input end of the second line first-effect first-stage evaporator (303).

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