A self-circulation MVR evaporation crystallization system

Abstract

The utility model relates to a kind of self-circulation MVR evaporation crystallization system.The structure includes: falling film evaporator main body, separation chamber main body, circulating pump main body, Roots compressor main body, support frame and tubular heat exchanger, the input end of falling film evaporator main body is raw water inlet, falling film evaporator main body right side is equipped with separation chamber main body, falling film evaporator main body front is equipped with circulating pump main body, separation chamber main body rear is equipped with Roots compressor main body, by installing tubular heat exchanger, tubular heat exchanger is composed of tube bundle, shell, tube sheet etc., its structure is solid, can withstand higher pressure, in MVR system, there will be certain pressure fluctuation, tubular heat exchanger can be stable operation, guarantee the safety and reliability of preheating process, simultaneously, raw water can be filtered, raw water is heated and filtered, reduce the steam consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of MVR evaporation crystallization systems, and in particular to a self-circulating MVR evaporation crystallization system. Background Technology

[0002] The MVR evaporation crystallization system, consisting of a circulating pump, a falling film evaporator, a separation chamber, and a Roots compressor, is a key device for achieving efficient evaporation crystallization. The circulating pump circulates the liquid feed, the falling film evaporator distributes the liquid feed evenly and evaporates it, the separation chamber separates the gas and liquid, and the Roots compressor compresses the secondary steam to increase the heat energy. The system has a self-circulation function; the secondary steam is compressed and returned to the evaporator to heat the liquid feed. The liquid feed continues to circulate and evaporate until supersaturated crystallization is achieved, effectively utilizing heat energy and reducing energy consumption.

[0003] In the aforementioned MVR evaporation crystallization system, the lack of a preheating structure has obvious drawbacks. The raw water enters the falling film evaporator directly through the pipeline without preheating, which results in a low initial temperature of the raw water. In the subsequent evaporation process, more heating steam is needed to raise the temperature of the raw water in order to reach the required evaporation temperature. This not only directly leads to a significant increase in heating steam consumption, but also reduces energy utilization efficiency. The system needs to consume more energy to maintain operation, resulting in a significant increase in overall energy consumption.

[0004] Therefore, to address the above problems, a novel self-circulating MVR evaporation crystallization system is proposed. Utility Model Content

[0005] To overcome the problems existing in related technologies, this utility model provides a self-circulating MVR evaporation crystallization system that can preheat the raw water before it enters the input end of the falling film evaporator. This can reduce the consumption of heating steam in the subsequent evaporation process and reduce the overall energy consumption of the system.

[0006] To achieve the above objectives, the first aspect of this utility model provides a self-circulating MVR evaporation crystallization system, comprising:

[0007] The main body of the falling film evaporator, the main body of the separation chamber, the main body of the circulating pump, the main body of the Roots compressor, the support frame, and the shell-and-tube heat exchanger;

[0008] The inlet of the falling film evaporator is the raw water inlet. The separation chamber is located on the right side of the falling film evaporator. The circulating pump is located in front of the falling film evaporator. The Roots compressor is located behind the separation chamber. The falling film evaporator, the separation chamber, the circulating pump, and the Roots compressor are all connected by pipes. A support frame is located between the circulating pump and the Roots compressor. The lower surfaces of the falling film evaporator and the separation chamber are in contact with the upper surface of the support frame. A shell-and-tube heat exchanger for preheating the raw water is connected to the falling film evaporator.

[0009] Furthermore, a steam jet pump is connected to the right side of the Roots compressor body.

[0010] Furthermore, a support base is symmetrically and fixedly connected to the upper surface of the support frame, and a buffer pad is fixedly connected to the inner wall of the support base. The main surface of the falling film evaporator and the main surface of the separation chamber are both in contact with the buffer pad.

[0011] Furthermore, the buffer pad has strip-shaped holes spaced at equal intervals.

[0012] Furthermore, four auxiliary legs are symmetrically and fixedly connected to the upper surface of the support frame on the support base.

[0013] Furthermore, a clamping mounting shell is symmetrically provided above the support frame, and a first clamping rod is slidably connected to the inner wall of the clamping mounting shell. A second clamping rod is provided on the right side of the first clamping rod and slidably connected to the inner wall of the clamping mounting shell.

[0014] Furthermore, a first electric push rod is fixedly connected to the inner wall of the clamping and mounting housing, the moving end of the first electric push rod is fixedly connected to the first clamping rod, and guide blocks that are slidably connected to the inner wall of the clamping and mounting housing are fixedly connected to the upper and lower surfaces of the first clamping rod and the upper and lower surfaces of the second clamping rod.

[0015] Furthermore, a second electric push rod is symmetrically fixedly connected to the upper surface of the support frame. The moving end of the second electric push rod is fixedly connected to the lower surface of the clamping and mounting shell. Piston cylinders fixedly connected to the upper surface of the support frame are provided on both sides of the second electric push rod. A piston rod is slidably connected inside the piston cylinder. The top end of the piston rod is fixedly connected to the lower surface of the clamping and mounting shell.

[0016] The technical solution provided by this utility model can include the following beneficial effects:

[0017] In this example, by installing a shell-and-tube heat exchanger, the raw water first enters the shell-and-tube heat exchanger, then passes through the falling film evaporator body and enters the separation chamber body for defoaming. It then enters the Roots compressor body at a low temperature, where the Roots compressor body heats it and returns it to the falling film evaporator body. From the bottom, it enters the circulating pump body at a low temperature, where the circulating pump body heats it and sends it back to the falling film evaporator body, and this cycle repeats. The shell-and-tube heat exchanger consists of tube bundles, a shell, and tube sheets, and its robust structure can withstand high pressures. In MVR systems, there will be some pressure fluctuations; the shell-and-tube heat exchanger can operate stably, ensuring the safety and reliability of the preheating process. Simultaneously, it can filter the raw water and heat and filter it, reducing steam consumption.

[0018] In this example, by installing a steam jet pump, when the compression ratio requirement of the system increases and the Roots compressor alone cannot meet the requirement, the steam jet pump can be used in conjunction with the Roots compressor. The steam jet pump uses the ejector effect of high-pressure steam to compress and increase the pressure of the generated secondary steam, and then combines it with the steam compressed by the Roots compressor to jointly provide heating steam for the falling film evaporator. This expands the applicability of the system, enables it to handle evaporation and crystallization at higher boiling points, and improves the system's processing capacity and efficiency.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0021] Figure 1 This is a schematic diagram of the overall structure from one angle shown in one embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure from another angle, as shown in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the support structure shown in an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional schematic diagram of the clamping and mounting shell shown in an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram of the piston cylinder shown in an embodiment of the present invention.

[0026] The correspondence between the labels and component names in the attached figures is as follows:

[0027] 1. Falling film evaporator body; 2. Separation chamber body; 3. Circulation pump body; 4. Roots compressor body; 5. Support frame; 6. Shell and tube heat exchanger; 7. Steam jet pump; 8. Support base; 9. Buffer pad; 10. Auxiliary support foot; 11. Clamping mounting shell; 12. First clamping rod; 13. Second clamping rod; 14. First electric push rod; 15. Guide block; 16. Second electric push rod; 17. Piston cylinder; 18. Piston rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0029] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0030] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Designing a self-circulating MVR evaporation crystallization system is currently the primary technical problem that engineers need to solve.

[0032] To address the aforementioned issues, this utility model provides a self-circulating MVR evaporation crystallization system. This structure preheats the raw water before it enters the input end of the falling film evaporator, thereby reducing the consumption of heating steam during subsequent evaporation and lowering the overall energy consumption of the system.

[0033] The technical solution of the present invention (Embodiment 1) is described in detail below with reference to the accompanying drawings.

[0034] Figure 1This is a schematic diagram of the overall structure from one angle shown in one embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure from another angle, as shown in an embodiment of the present invention; Figure 3 This is a schematic diagram of the support structure shown in an embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of the clamping and mounting shell shown in an embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the piston cylinder shown in an embodiment of the present invention.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The self-circulating MVR evaporation crystallization system specifically includes:

[0036] The main body of the falling film evaporator 1, the main body of the separation chamber 2, the main body of the circulating pump 3, the main body of the Roots compressor 4, the support frame 5, and the shell and tube heat exchanger 6;

[0037] The input end of the falling film evaporator body 1 is the raw water inlet. The right side of the falling film evaporator body 1 is provided with the separation chamber body 2. The front of the falling film evaporator body 1 is provided with the circulation pump body 3. The rear of the separation chamber body 2 is provided with the Roots compressor body 4. The falling film evaporator body 1, the separation chamber body 2, the circulation pump body 3 and the Roots compressor body 4 are all connected by pipes. The circulation pump body 3 and the Roots compressor body 4 are provided with a support frame 5. The upper surface of the support frame 5 is symmetrically provided with U-shaped holes. The lower surface of the falling film evaporator body 1 and the lower surface of the separation chamber body 2 are both in contact with the upper surface of the support frame 5. The falling film evaporator body 1 is connected to a shell-and-tube heat exchanger 6 for preheating the raw water.

[0038] Specifically, a steam jet pump 7 is connected to the right side of the Roots compressor body 4.

[0039] Specifically, a support base 8 is symmetrically fixedly connected to the upper surface of the support frame 5, and a buffer pad 9 is fixedly connected to the inner wall of the support base 8. The surfaces of the falling film evaporator body 1 and the separation chamber body 2 are both in contact with the buffer pad 9.

[0040] Specifically, the buffer pad 9 has strip-shaped holes at equal intervals.

[0041] Specifically, four auxiliary legs 10 are symmetrically and fixedly connected to the support base 8 and fixedly connected to the upper surface of the support frame 5.

[0042] Specifically, a clamping mounting shell 11 is symmetrically provided above the support frame 5. A first clamping rod 12 is slidably connected to the inner wall of the clamping mounting shell 11. A second clamping rod 13 is provided on the right side of the first clamping rod 12 and slidably connected to the inner wall of the clamping mounting shell 11. A rack is fixedly connected to the surface of the first clamping rod 12 and the surface of the second clamping rod 13. A gear is rotatably connected to the inner wall of the clamping mounting shell 11. The rack on the surface of the first clamping rod 12 and the rack on the surface of the second clamping rod 13 are both meshed with the gear.

[0043] Specifically, a first electric push rod 14 is fixedly connected to the inner wall of the clamping and mounting shell 11. The moving end of the first electric push rod 14 is fixedly connected to the first clamping rod 12. Guide blocks 15 that are slidably connected to the inner wall of the clamping and mounting shell 11 are fixedly connected to the upper and lower surfaces of the first clamping rod 12 and the upper and lower surfaces of the second clamping rod 13.

[0044] Specifically, a second electric push rod 16 is symmetrically fixedly connected to the upper surface of the support frame 5. The moving end of the second electric push rod 16 is fixedly connected to the lower surface of the clamping and mounting shell 11. Piston cylinders 17 are provided on both sides of the second electric push rod 16 and are fixedly connected to the upper surface of the support frame 5. A piston rod 18 is slidably connected inside the piston cylinder 17. The top end of the piston rod 18 is fixedly connected to the lower surface of the clamping and mounting shell 11.

[0045] In this embodiment, how to preheat the raw water, combined with Figure 1 and Figure 2 The specific implementation method is as follows: Raw water first enters the shell-and-tube heat exchanger 6, passes through the falling film evaporator body 1, and enters the separation chamber body 2 for defoaming. It then enters the Roots compressor body 4 at a low temperature, where it is heated and returned to the falling film evaporator body 1. From the bottom, it enters the circulating pump body 3 at a low temperature, where it is heated and sent back to the falling film evaporator body 1. This cycle repeats. The shell-and-tube heat exchanger 6 consists of tube bundles, a shell, and tube sheets, and its robust structure can withstand high pressures. In MVR systems, there will be some pressure fluctuations; the shell-and-tube heat exchanger 6 can operate stably, ensuring the safety and reliability of the preheating process. Simultaneously, it can filter and heat the raw water, reducing steam consumption.

[0046] In this embodiment, how to compress and pressurize steam, combined with Figure 1 and Figure 2The specific implementation method is as follows: When the compression ratio requirement of the system is increased and the Roots compressor body 4 alone is difficult to meet, the steam jet pump 7 can be used in conjunction with the Roots compressor body 4. The steam jet pump 7 uses the ejection effect of high-pressure steam to compress and increase the pressure of the generated secondary steam, and then combines it with the steam compressed by the Roots compressor body 4 to jointly provide heating steam for the falling film evaporator. This expands the applicability of the system, enables it to handle evaporation and crystallization at higher boiling points, and improves the system's processing capacity and efficiency.

[0047] In this embodiment, how to support the bottom ends of the falling film evaporator body 1 and the separation chamber body 2, combined with... Figure 3 The specific implementation method is as follows: the falling film evaporator body 1 and the separation chamber body 2 are placed inside the support base 8, the buffer pad 9 provides buffer protection, the strip hole can enhance the anti-slip effect of the buffer pad 9, and at the same time, the auxiliary support foot 10 can improve the support stability of the support base 8.

[0048] In this embodiment, how to support the sides of the falling film evaporator body 1 and the separation chamber body 2, combined with Figure 4 The specific implementation method is as follows: the first electric push rod 14 inside the clamping and mounting shell 11 is activated, the moving end of the first electric push rod 14 retracts, the gear drives the two racks to move closer to each other, and controls the first clamping rod 12 and the second clamping rod 13 to move closer to each other, thereby driving the first clamping rod 12 and the second clamping rod 13 to clamp the sides of the falling film evaporator body 1 and the separation chamber body 2. When the first clamping rod 12 and the second clamping rod 13 move, the guide block 15 slides along the inner wall of the clamping and mounting shell 11 to ensure the stable movement of the first clamping rod 12 and the second clamping rod 13.

[0049] In this embodiment, how to make the clamping mounting shell 11 adjustable in height to adapt to the side heights of the falling film evaporator body 1 and the separation chamber body 2, combined with... Figure 5 The specific implementation method is as follows: the second electric push rod 16 is activated, the moving end of the second electric push rod 16 extends and retracts, driving the piston rod 18 to move up and down along the inside of the piston cylinder 17, driving the clamping and mounting shell 11 to move up and down, thereby adjusting its height.

[0050] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0051] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A self-circulating MVR evaporation crystallization system, characterized in that, include: The main body of the falling film evaporator (1), the main body of the separation chamber (2), the main body of the circulating pump (3), the main body of the Roots compressor (4), the support frame (5), and the shell and tube heat exchanger (6); The input end of the falling film evaporator body (1) is the raw water inlet. The right side of the falling film evaporator body (1) is provided with a separation chamber body (2). The front of the falling film evaporator body (1) is provided with a circulation pump body (3). The rear of the separation chamber body (2) is provided with a Roots compressor body (4). The falling film evaporator body (1), the separation chamber body (2), the circulation pump body (3) and the Roots compressor body (4) are all connected by pipes. A support frame (5) is provided between the circulation pump body (3) and the Roots compressor body (4). The lower surface of the falling film evaporator body (1) and the lower surface of the separation chamber body (2) are both in contact with the upper surface of the support frame (5). A shell-and-tube heat exchanger (6) for preheating the raw water is connected to the falling film evaporator body (1).

2. The self-circulating MVR evaporation crystallization system according to claim 1, characterized in that: A steam jet pump (7) is connected to the right side of the Roots compressor body (4).

3. The self-circulating MVR evaporation crystallization system according to claim 1, characterized in that: The upper surface of the support frame (5) is symmetrically fixedly connected with a support base (8), and the inner wall of the support base (8) is fixedly connected with a buffer pad (9). The surface of the falling film evaporator body (1) and the surface of the separation chamber body (2) are both in contact with the buffer pad (9).

4. The self-circulating MVR evaporation crystallization system according to claim 3, characterized in that: The buffer pad (9) has strip-shaped holes at equal intervals.

5. The self-circulating MVR evaporation crystallization system according to claim 4, characterized in that: The support base (8) is symmetrically and fixedly connected to four auxiliary legs (10) that are fixedly connected to the upper surface of the support frame (5).

6. The self-circulating MVR evaporation crystallization system according to claim 5, characterized in that: The support frame (5) is symmetrically provided with clamping mounting shells (11) above it. A first clamping rod (12) is slidably connected to the inner wall of the clamping mounting shell (11). A second clamping rod (13) is provided on the right side of the first clamping rod (12) and slidably connected to the inner wall of the clamping mounting shell (11).

7. The self-circulating MVR evaporation crystallization system according to claim 6, characterized in that: The inner wall of the clamping mounting shell (11) is fixedly connected to a first electric push rod (14), the moving end of the first electric push rod (14) is fixedly connected to the first clamping rod (12), and the upper and lower surfaces of the first clamping rod (12) and the upper and lower surfaces of the second clamping rod (13) are both fixedly connected to guide blocks (15) that are slidably connected to the inner wall of the clamping mounting shell (11).

8. The self-circulating MVR evaporation crystallization system according to claim 6, characterized in that: The upper surface of the support frame (5) is symmetrically fixedly connected with a second electric push rod (16). The moving end of the second electric push rod (16) is fixedly connected to the lower surface of the clamping and mounting shell (11). The second electric push rod (16) has piston cylinders (17) fixedly connected to the upper surface of the support frame (5) on both sides. A piston rod (18) is slidably connected inside the piston cylinder (17). The top end of the piston rod (18) is fixedly connected to the lower surface of the clamping and mounting shell (11).

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