Multi-effect evaporation system

Abstract

The invention discloses a multi-effect evaporation system, and relates to the technical field of multi-effect evaporation, the multi-effect evaporation system comprises a separator, a heater, a circulating pump, a condenser, a thickener, a centrifugal machine and a mother liquor tank which are connected in sequence, the separator is connected with the heater and the condenser through valves, the thickener is arranged at the output end of the condenser, and the centrifugal machine is arranged at the output end of the condenser. And the output end of the thickener is connected with a centrifugal machine through a valve. According to the multi-effect evaporation system, a built-in disc can be driven to move up and down in a mother liquid tank through clockwise or anticlockwise rotation of a threaded rod, so that a material placed in the mother liquid tank can move up and down, and the material liquid in the mother liquid tank can be continuously oscillated by moving the built-in disc up and down in the mother liquid tank; meanwhile, the material liquid can conveniently flow out from the liquid outlets in the two sides of the mother liquid tank through the position movement of the built-in disc, the material liquid does not need to flow out from the bottom of the mother liquid tank, the operation space when the material liquid flows out is increased, and a user can conveniently conduct maintenance and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of multiple-effect evaporation, in particular to a multiple-effect evaporation system. Background Art

[0002] The heat transfer process of multi-effect evaporation is boiling and condensation heat exchange, which is double-sided phase change heat transfer. Due to this heat transfer method, the heat transfer coefficient of multi-effect evaporation is very high. For the same temperature range, the heat transfer area used by multi-effect evaporation is less than that of multi-stage flash evaporation. The multi-effect evaporator can make full use of the energy of secondary steam, thereby reducing energy consumption. Generally speaking, the energy consumption of a multi-effect evaporator is more than 30% lower than that of a single-effect evaporator.

[0003] Currently, there is a risk of scaling in the multiple-effect evaporation system. The hardness ions in the raw water are prone to form scale, which affects the efficiency and service life of the evaporator.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a multi-effect evaporation system is proposed. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a multi-effect evaporation system, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multiple-effect evaporation system, comprising a separator, a heater, a circulation pump, a condenser, a thickener, a centrifuge and a mother liquid tank connected in sequence, the separator is connected to the heater and the condenser respectively through valves, the output end of the condenser is provided with a thickener, and the output end of the thickener is connected to the centrifuge through a valve, the output end of the centrifuge is connected to the mother liquid tank through a valve, and the heater is connected to the circulation pump through a valve.

[0007] Furthermore, a driving motor is provided at the top of the mother liquid tank, and a threaded rod is installed at the output end of the driving motor through a driving shaft, a built-in disk is threadedly provided on the outer surface of the threaded rod, and a cleaning component for cleaning the inner surface of the mother liquid tank is installed on the bottom outer surface of the built-in disk, the cleaning component includes a connecting disk and a scraper, and the scraper is annularly provided on the bottom outer surface of the connecting disk, a bottom plate is installed with a chassis, and a stabilizing rod is annularly provided at the bottom of the chassis, the outer surface of the built-in disk is annularly connected with an extended auxiliary rod, and a top cover is installed on the top outer surface of the mother liquid tank.

[0008] Furthermore, a material collecting assembly for assisting in collecting cleaned materials is provided below the chassis, and the material collecting assembly includes an upper plate, a middle plate, an auxiliary plate and a lower plate, a middle plate is provided below the upper plate, and an auxiliary plate is connected to the bottom outer surface of the middle plate, and a lower plate is installed below the auxiliary plate.

[0009] Furthermore, the upper plate is fixedly arranged on the lower surface of the mother liquid tank, and the middle plate is rotatably arranged inside the mother liquid tank.

[0010] Furthermore, the lower plate is arranged below the upper plate, and a mother liquid tank is fixedly arranged at the end of the lower plate.

[0011] Furthermore, the lower plates are provided with two groups, and a connecting shaft is rotatably installed between the two groups of lower plates.

[0012] Furthermore, a middle disk is arranged at the top of the connecting shaft, and a bottom motor is arranged at the bottom of the connecting shaft.

[0013] Furthermore, a connecting chassis is provided at the bottom of the mother liquid tank, and an auxiliary frame is provided at the bottom of the connecting chassis, a threaded cover is threadedly installed on one side of the bottom of the auxiliary frame, an internal built-in plate is rotatably provided inside the threaded cover, and a connecting shaft is fixedly installed on the outer surface of one side of the built-in plate.

[0014] Furthermore, a feed port is provided at the top of the mother liquid tank, and a feed closing cap is threadedly installed at the end of the feed port. Liquid outlets are provided on both the front and rear sides of the mother liquid tank, and liquid outlet closing caps are threadedly installed at the end of the liquid outlet.

[0015] Furthermore, a protective cover is installed on the outer surface of the mother liquid tank, and a stabilizing frame is distributed in an annular manner on the outer surface of the bottom of the protective cover.

[0016] The present invention provides a multi-effect evaporation system, which has the following beneficial effects:

[0017] 1. The multi-effect evaporation system can drive the built-in disk to move up or down inside the mother liquid tank through the clockwise or counterclockwise rotation of the threaded rod, so that the material placed in the mother liquid tank can be moved up or down. By moving the built-in disk up and down in the mother liquid tank, the material liquid in the mother liquid tank can be continuously oscillated to avoid crystallization of the material liquid in the mother liquid tank. At the same time, the position movement of the built-in disk facilitates the material liquid to flow out from the liquid outlets on both sides of the mother liquid tank without flowing out from the bottom of the mother liquid tank, thereby increasing the operating space when the material liquid flows out, and facilitating maintenance and inspection by users.

[0018] 2. The multi-effect evaporation system can drive the connecting disk and the scraper to rotate by the rotation of the built-in disk. When the scraper rotates, it can fit the inner surface of the mother liquid tank, and can scrape and clean the attachments on the inner surface of the mother liquid tank, so as to avoid the internal space of the mother liquid tank becoming smaller due to attachments after long-term use.

[0019] 3. The multi-effect evaporation system can drive the middle plate to rotate through the design of the connecting shaft and the bottom motor. Through the distance between the middle plate and the upper plate, when the middle plate rotates about the upper plate, the scraped and cleaned materials falling from the outer surface of the lower plate can be transferred to the auxiliary frame at the bottom of the mother liquid tank, wherein the upper plate, the middle plate, the auxiliary plate and the lower plate are all located inside the conical frame. After the scraped and cleaned materials fall into the inside of the conical frame, they will be transferred to the auxiliary frame. At the same time, with the design of the built-in plate, the cleaned materials inside the auxiliary frame can be pushed to the threaded cover, which is convenient for the user to open the threaded cover to take out the cleaned materials. The cleaned materials after cleaning the inner surface of the mother liquid tank will not be mixed and contaminated with the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall process structure of a multiple-effect evaporation system of the present invention;

[0021] Figure 2 It is a partial cross-sectional structural schematic diagram of a mother liquid tank of a multiple-effect evaporation system of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall structure of a mother liquid tank of a multiple-effect evaporation system of the present invention;

[0023] Figure 4 It is a schematic diagram of the distribution structure of the mother liquid tank and the auxiliary frame of a multiple-effect evaporation system of the present invention;

[0024] Figure 5 A schematic diagram of the protective cover structure of a multiple-effect evaporation system of the present invention;

[0025] Figure 6 It is a schematic diagram of the assembly structure of the upper plate, the middle plate and the lower plate of a multiple-effect evaporation system of the present invention;

[0026] Figure 7 This is a schematic structural diagram of a material receiving component of a multiple-effect evaporation system of the present invention;

[0027] Figure 8 The present invention is a schematic diagram of a connecting chassis structure of a multi-effect evaporation system.

[0028] In the figure: 1. separator; 2. heater; 3. circulation pump; 4. condenser; 5. thickener; 6. centrifuge; 7. mother liquor tank; 8. threaded rod; 9. extension auxiliary rod; 10. built-in plate; 11. bottom plate; 12. stabilizing rod; 13. feed port; 14. feed closure cover; 15. drive motor; 16. liquid outlet; 17. liquid outlet closure cover; 18. protective cover; 19. top cover; 20. connecting shaft; 21. bottom motor; 22. auxiliary frame; 23. threaded cover; 24. stabilizing frame; 25. material receiving assembly; 2501. upper plate; 2502. middle plate; 2503. auxiliary plate; 2504. lower plate; 26. connecting bottom plate; 27. built-in plate; 28. cleaning assembly; 2801. connecting plate; 2802. scraper. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] like Figure 1-Figure 8 As shown, the present invention provides a technical solution: a multiple-effect evaporation system, comprising a separator 1, a heater 2, a circulation pump 3, a condenser 4, a thickener 5, a centrifuge 6 and a mother liquid tank 7 connected in sequence, the separator 1 is connected to the heater 2 and the condenser 4 respectively through valves, the output end of the condenser 4 is provided with a thickener 5, and the output end of the thickener 5 is connected to the centrifuge 6 through a valve, the output end of the centrifuge 6 is connected to the mother liquid tank 7 through a valve, the heater 2 is connected to the circulation pump 3 through a valve, and advanced pretreatment processes such as deep oxidation and ion exchange are introduced to effectively reduce the concentration of organic matter and total hardness, increase the concentration multiple, and avoid No scaling, extend equipment life, reduce downtime maintenance, improve system stability and processing efficiency, the entire multi-effect evaporation system is equipped with monitoring instruments and PLC automatic control system, and the PLC automatic control system has functions such as multi-parameter linkage, intelligent monitoring, equipment protection and fault warning, forming a highly integrated automation system. Through the feedback signals of temperature, flow, pressure, liquid level and other sensors, the PLC control system automatically maintains the balance of various data to ensure that the system can operate continuously, stably and efficiently, improve accuracy and stability, and reduce human errors and risks. The liquid level of the mother liquor tank 7 is linked with the mother liquor pump, and the pump automatically starts and stops according to the liquid level setting.

[0031] like Figure 2 and Figure 7As shown, a driving motor 15 is provided at the top of the mother liquid tank 7, and a threaded rod 8 is installed at the output end of the driving motor 15 through a driving shaft, a built-in disk 10 is threadedly provided on the outer surface of the threaded rod 8, and a cleaning component 28 for cleaning the inner surface of the mother liquid tank 7 is installed on the bottom outer surface of the built-in disk 10, the cleaning component 28 includes a connecting disk 2801 and a scraper 2802, and the bottom outer surface of the connecting disk 2801 is annularly provided with the scraper 2802, a bottom of the threaded rod 8 is installed with a base plate 11, and a stabilizing rod 12 is annularly provided at the bottom of the base plate 11, an extended auxiliary rod 9 is annularly connected to the outer surface of the built-in disk 10, and a top cover 19 is installed on the top outer surface of the mother liquid tank 7. The design of the driving motor 15 can drive the threaded rod 8 to rotate clockwise or counterclockwise, and the clockwise or counterclockwise rotation of the threaded rod 8 can drive the built-in The disk 10 moves up or down inside the mother liquid tank 7, so that the material placed in the mother liquid tank 7 can be moved up or down. By moving the built-in disk 10 up and down in the mother liquid tank 7, the material in the mother liquid tank 7 can be continuously shaken to avoid crystallization of the material in the mother liquid tank 7. At the same time, the movement of the position of the built-in disk 10 facilitates the material to flow out from the liquid outlets 16 on both sides of the mother liquid tank 7 without flowing out from the bottom of the mother liquid tank 7, thereby increasing the operating space when the material flows out, and facilitating maintenance and inspection by users. In addition, the rotation of the built-in disk 10 can drive the connecting disk 2801 and the scraper 2802 to rotate accordingly. When the scraper 2802 rotates, it can fit on the inner surface of the mother liquid tank 7, and can scrape and clean the attachments on the inner surface of the mother liquid tank 7, thereby avoiding the internal space of the mother liquid tank 7 from becoming smaller due to attachments after long-term use.

[0032] like Figure 2-Figure 8As shown, a material collecting assembly 25 for assisting in collecting the cleaned materials is provided below the bottom of the bottom plate 11, and the material collecting assembly 25 includes an upper plate 2501, a middle plate 2502, an auxiliary plate 2503 and a lower plate 2504. The middle plate 2502 is provided below the upper plate 2501, and the bottom outer surface of the middle plate 2502 is connected to the auxiliary plate 2503, and the lower plate 2504 is installed below the auxiliary plate 2503. The lower plate 2504 is provided below the upper plate 2501, and a mother liquid tank 7 is fixedly provided at the end of the lower plate 2504. A protective cover 18 is installed on the outer surface of the mother liquid tank 7, and a stabilizing frame 24 is distributed in an annular manner on the bottom outer surface of the protective cover 18. The cover 18 is designed to shield and protect the mother liquid tank 7 from the outside, and is supported by a stabilizing frame 24. A feed port 13 is provided on the top of the mother liquid tank 7, and a feed closure cap 14 is threadedly installed on the end of the feed port 13. Liquid outlets 16 are provided on both the front and rear sides of the mother liquid tank 7, and a liquid outlet closure cap 17 is threadedly installed on the end of the liquid outlet 16. A connecting chassis 26 is provided at the bottom of the mother liquid tank 7, and an auxiliary frame 22 is provided at the bottom of the connecting chassis 26. A threaded cover 23 is threadedly installed on one side of the bottom of the auxiliary frame 22. A built-in plate 27 is rotatably provided inside the threaded cover 23, and a connecting shaft 20 is fixedly installed on the outer surface of one side of the built-in plate 27. The upper plate 2501 is fixedly arranged on the lower surface of the mother liquid tank 7, the middle plate 2502 is rotatably arranged inside the mother liquid tank 7, and two groups of lower plates 2504 are arranged. A connecting shaft 20 is rotatably installed between the two groups of lower plates 2504. The middle plate 2502 is arranged on the top of the connecting shaft 20, and a bottom motor 21 is arranged on the bottom of the connecting shaft 20. After the attachments on the inner surface of the mother liquid tank 7 are scraped off, they will fall to the hollow part of the upper plate 2501 and the outer surface of the lower plate 2504. The design of the connecting shaft 20 and the bottom motor 21 can drive the middle plate 2502 to rotate. Through the distance between the middle plate 2502 and the upper plate 2501, the middle plate 2502 can be rotated. When the upper plate 2501 rotates, the scraped cleaning material falling from the outer surface of the lower plate 2504 is transferred to the auxiliary frame 22 at the bottom of the mother liquid tank 7, wherein the upper plate 2501, the middle plate 2502, the auxiliary plate 2503 and the lower plate 2504 are all located inside the conical frame. After the scraped cleaning material falls into the conical frame, it is transferred to the auxiliary frame 22. At the same time, with the design of the built-in plate 27, the cleaning material inside the auxiliary frame 22 can be pushed to the threaded cover 23, so that the user can open the threaded cover 23 to take out the cleaning material. After cleaning the inner surface of the mother liquid tank 7, the cleaning material will not be mixed and contaminated with the liquid, which is convenient for the user to perform the cleaning operation.

[0033] In summary, if Figure 1-Figure 8As shown in the figure, the multi-effect evaporation system has introduced advanced pretreatment processes such as deep oxidation and ion exchange, which can effectively reduce the concentration of organic matter and total hardness, increase the concentration multiple, avoid scaling, extend the life of the equipment, reduce downtime for maintenance, and improve the stability of the system and the processing efficiency. The entire multi-effect evaporation system is equipped with monitoring instruments and a PLC automatic control system, and the PLC automatic control system has functions such as multi-parameter linkage, intelligent monitoring, equipment protection and fault warning, forming a highly integrated automation system. Through the feedback signals of sensors such as temperature, flow, pressure, and liquid level, the PLC control system automatically maintains the balance of various data to ensure that the system can operate continuously, stably and efficiently, and improves the accuracy. The system is highly stable and reduces human errors and risks. The mother liquor tank level is linked to the mother liquor pump, and the pump automatically starts and stops according to the liquid level setting. When in use, advanced pretreatment processes such as deep oxidation and ion exchange are introduced to effectively reduce the concentration of organic matter and total hardness, increase the concentration multiple, avoid scaling, extend the life of the equipment, reduce downtime for maintenance, and improve system stability and processing efficiency. The entire multi-effect evaporation system is equipped with monitoring instruments and PLC automatic control system, and the PLC automatic control system has functions such as multi-parameter linkage, intelligent monitoring, equipment protection and fault warning, forming a highly integrated automation system. Through the feedback signals of sensors such as temperature, flow, pressure, and liquid level, the PLC control The control system automatically maintains various data balances to ensure that the system can operate continuously, stably and efficiently, improves accuracy and stability, and reduces human errors and risks. The liquid level of the mother liquid tank 7 is linked to the mother liquid pump, and the pump automatically starts and stops according to the liquid level setting. Then, the attachments scraped off the inner surface of the mother liquid tank 7 will fall to the hollow part of the upper plate 2501 to the outer surface of the lower plate 2504. The design of the connecting shaft 20 and the bottom motor 21 can drive the middle plate 2502 to rotate. Through the distance between the middle plate 2502 and the upper plate 2501, the scraped and cleaned materials falling from the outer surface of the lower plate 2504 can be transferred to the mother liquid tank when the middle plate 2502 rotates relative to the upper plate 2501. In the auxiliary frame 22 at the bottom of 7, the upper plate 2501, the middle plate 2502, the auxiliary plate 2503 and the lower plate 2504 are all located inside the conical frame. After the scraped cleaning materials fall into the inside of the conical frame, they will be transferred to the auxiliary frame 22. At the same time, with the design of the built-in plate 27, the cleaning materials inside the auxiliary frame 22 can be pushed to the threaded cover 23, which is convenient for the user to open the threaded cover 23 to take out the cleaning materials. After cleaning the inner surface of the mother liquid tank 7, the cleaning materials will not be mixed and contaminated with the material liquid, which is beneficial for the user to perform the cleaning operation. Finally, the design of the protective cover 18 can shield and protect from the outside of the mother liquid tank 7, and at the same time use the stabilizing frame 24 for support.

[0034] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A multiple-effect evaporation system, comprising a separator (1), a heater (2), a circulation pump (3), a condenser (4), a thickener (5), a centrifuge (6) and a mother liquid tank (7) connected in sequence, characterized in that: The separator (1) is connected to the heater (2) and the condenser (4) respectively through valves; the output end of the condenser (4) is provided with a thickener (5), and the output end of the thickener (5) is connected to a centrifuge (6) through a valve; the output end of the centrifuge (6) is connected to a mother liquor tank (7) through a valve; and the heater (2) is connected to a circulation pump (3) through a valve.

2. A multiple-effect evaporation system according to claim 1, characterized in that: A driving motor (15) is arranged at the top of the mother liquid tank (7), and a threaded rod (8) is installed at the output end of the driving motor (15) through a driving shaft. The outer surface of the threaded rod (8) is threadedly provided with a built-in disk (10), and the bottom outer surface of the built-in disk (10) is provided with a cleaning component (28) for cleaning the inner surface of the mother liquid tank (7). The cleaning component (28) includes a connecting disk (2801) and a scraper (2802), and the bottom outer surface of the connecting disk (2801) is provided with a scraper (2802) in an annular shape. A bottom plate (11) is installed at the bottom of the threaded rod (8), and a stabilizing rod (12) is annularly provided at the bottom of the bottom plate (11). An extension auxiliary rod (9) is annularly connected to the outer surface of the built-in disk (10), and a top cover (19) is installed at the top outer surface of the mother liquid tank (7).

3. A multiple-effect evaporation system according to claim 2, characterized in that: A material collecting assembly (25) for assisting in collecting cleaned materials is arranged below the chassis (11), and the material collecting assembly (25) comprises an upper plate (2501), a middle plate (2502), an auxiliary plate (2503) and a lower plate (2504); a middle plate (2502) is arranged below the upper plate (2501), and an auxiliary plate (2503) is connected to the outer surface of the bottom of the middle plate (2502); and a lower plate (2504) is installed below the auxiliary plate (2503).

4. A multiple-effect evaporation system according to claim 3, characterized in that: The upper plate (2501) is fixedly arranged on the lower surface of the mother liquid tank (7), and the middle plate (2502) is rotatably arranged inside the mother liquid tank (7).

5. A multiple-effect evaporation system according to claim 3, characterized in that: The lower plate (2504) is arranged below the upper plate (2501), and a mother liquid tank (7) is fixedly arranged at the end of the lower plate (2504).

6. A multiple-effect evaporation system according to claim 5, characterized in that: The lower plates (2504) are provided in two groups, and a connecting shaft (20) is rotatably installed between the two groups of lower plates (2504).

7. A multiple-effect evaporation system according to claim 6, characterized in that: A middle disk (2502) is arranged at the top of the connecting shaft (20), and a bottom motor (21) is arranged at the bottom of the connecting shaft (20).

8. A multiple-effect evaporation system according to claim 2, characterized in that: The bottom of the mother liquid tank (7) is provided with a connecting base plate (26), and the bottom of the connecting base plate (26) is provided with an auxiliary frame (22), a threaded cover (23) is threadedly installed on one side of the bottom of the auxiliary frame (22), an internal built-in plate (27) is rotatably arranged inside the threaded cover (23), and a connecting shaft (20) is fixedly installed on the outer surface of one side of the internal built-in plate (27).

9. A multiple-effect evaporation system according to claim 2, characterized in that: The mother liquid tank (7) is provided with a feed port (13) at the top, and a feed closing cap (14) is threadedly mounted on the end of the feed port (13); liquid outlets (16) are provided on both the front and rear sides of the mother liquid tank (7), and liquid outlet closing caps (17) are threadedly mounted on the end of the liquid outlet (16).

10. A multiple-effect evaporation system according to claim 2, characterized in that: A protective cover (18) is installed on the outer surface of the mother liquid tank (7), and a stabilizing frame (24) is distributed in an annular manner on the outer surface of the bottom of the protective cover (18).

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