Environment-friendly MVR evaporator

Abstract

The utility model belongs to the field of energy conservation and environmental protection, particularly relates to an environment-friendly MVR (mechanical vapor recompression) evaporator, and aims to solve the problem that the operation is inconvenient and tedious due to the fact that only the whole heat exchange tube needs to be detached when the existing independent heat exchange tube needs to be cleaned or replaced, the following scheme is provided: the environment-friendly MVR evaporator comprises an evaporator main body and a top cover mounted at the top of the evaporator main body; the separator is used for carrying out gas-liquid separation, and a first communicating pipe is fixedly communicated between the evaporator main body and the separator; the compressor is used for conveying separated gas into the evaporator body, and when scales are formed in the heat exchange pipes along with evaporation, the heat transfer efficiency is affected, and even blockage is caused, the fixing state of the heat exchange pipes can be directly relieved only by opening the top cover, so that the heat exchange pipes needing to be cleaned or replaced are directly detached, and the heat exchange efficiency is improved. Therefore, the effect is improved and the subsequent maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation and environmental protection, in particular to an environment-friendly MVR evaporator. Background Technique

[0002] In many industries such as chemical industry and pharmacy, the evaporation process, as one of the common unit operations, is widely used in multiple links such as solution concentration and substance purification. The MVR evaporator is a technology that introduces a compressor to compress the secondary steam generated during the evaporation process, increases its temperature and pressure, and then uses it as a heat source to heat the material to be processed again, thereby reducing energy consumption and the demand for external energy, and having significant energy conservation and environmental protection effects;

[0003] Most of the heat exchange tubes inside the existing evaporators are installed as a whole inside. With evaporation and concentration, scale will form inside the heat exchange tubes over time, thus affecting the heat transfer efficiency and even causing the heat exchange tubes to be blocked. At this time, when it is necessary to clean or replace a single heat exchange tube, the whole evaporator has to be disassembled, making the operation inconvenient and cumbersome. Content of the Utility Model

[0004] The purpose of the utility model is to solve the drawbacks in the prior art that most of the heat exchange tubes inside the evaporator are installed as a whole inside. With evaporation and concentration, scale will form inside the heat exchange tubes over time, thus affecting the heat transfer efficiency and even causing the heat exchange tubes to be blocked. At this time, when it is necessary to clean or replace a single heat exchange tube, the whole evaporator has to be disassembled, making the operation inconvenient and cumbersome, and to propose an environment-friendly MVR evaporator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An environment-friendly MVR evaporator, comprising an evaporator main body and a top cover installed on the top of the evaporator main body;

[0007] A separator for gas-liquid separation, and a first connecting pipe is fixedly connected between the evaporator main body and the separator;

[0008] A compressor for conveying the separated gas to the inside of the evaporator main body. A second connecting pipe is fixedly connected between the separator and the input end of the compressor, and a third connecting pipe is fixedly connected between the output end of the compressor and the evaporator main body;

[0009] An evaporation assembly for performing heat exchange on the stock solution input into the interior of the evaporator body. The evaporation assembly includes an upper mounting circular plate, a lower mounting circular plate, and a plurality of heat exchange tubes. The upper mounting circular plate is fixedly arranged at the top of the inner wall of the evaporator body, the lower mounting circular plate is fixedly arranged at the bottom of the inner wall of the evaporator body, and a plurality of the heat exchange tubes are all mounted between the upper mounting circular plate and the lower mounting circular plate.

[0010] In a possible design, a plurality of upper concave surfaces are formed on the surface of the upper mounting circular plate. Upper through holes are formed in the bottom inner wall of the upper concave surfaces. The top ends of a plurality of the heat exchange tubes respectively slide through the upper through holes to the upper side of the upper mounting circular plate. A fixing ring is fixedly sleeved on the outer wall of the heat exchange tube, and the fixing ring is located inside the upper concave surface. A positioning block is fixedly arranged on the outer wall of the fixing ring, and a positioning groove is formed in the inner wall of the upper concave surface, and the positioning block is located inside the positioning groove.

[0011] In a possible design, a rotating ring is rotatably arranged at the bottom of the fixing ring, and the rotating ring is sleeved on the outer wall of the heat exchange tube. A torsion spring is arranged between the fixing ring and the rotating ring. An L-shaped groove is formed in the inner wall of the positioning groove. A triangular block is fixedly arranged on the outer wall of the heat exchange tube, and the triangular block is located inside the L-shaped groove.

[0012] In a possible design, a plurality of lower concave surfaces are formed on the surface of the lower mounting circular plate. Lower through holes are formed in the bottom inner wall of the lower concave surfaces. The bottom end of the heat exchange tube is inserted into the interior of the lower concave surface, and the lower through hole is communicated with the heat exchange tube.

[0013] In a possible design, the evaporation assembly further includes a bottom plate. An outer cylinder is fixedly arranged at the bottom of the top cover. The bottom plate is fixedly arranged at the bottom of the outer cylinder. A plurality of communication holes are formed in the bottom of the bottom plate. The top ends of a plurality of the heat exchange tubes respectively extend into the plurality of communication holes. A plurality of insertion plates are fixedly arranged at the bottom of the bottom plate. The plurality of insertion plates are respectively located inside the plurality of L-shaped grooves, and the insertion plates cooperate with the adjacent triangular blocks.

[0014] In a possible design, an inner cylinder is fixedly arranged on the inner wall of the communication hole, and the bottom end of the inner cylinder extends into the interior of the heat exchange tube.

[0015] In a possible design, a liquid distributor is fixedly arranged on the inner wall of the outer cylinder.

[0016] In this application, during specific use, the stock solution enters the interior of the evaporator main body after preheating, and then uniformly enters the interior of the heat exchange tubes through the liquid distributor and the inner cylinder. At this time, steam enters the interior of the evaporator main body through the No. 3 connecting pipe, exchanges heat with the stock solution located inside the heat exchange tubes, the temperature gradually rises, and evaporation begins. The steam is separated from the solute in the material. Then, the steam enters the interior of the separator through the No. 1 connecting pipe, further separating the steam from tiny droplets or impurities to ensure the purity of the steam. The concentrated material is discharged from the bottom of the evaporator main body for subsequent treatment or collection. The pure secondary steam discharged from the separator is introduced into the compressor. Inside the compressor, the pressure and temperature of the steam are increased to meet the requirement of being able to be used as a heating heat source again and are transported back to the interior of the evaporator main body through the No. 3 connecting pipe again. Through this process, the steam energy that originally needed to be discharged is reused, realizing a closed-loop energy cycle;

[0017] When it is necessary to clean the heat exchange tubes, just open the top cover, and the plug board fixed to the bottom of the bottom plate will be disengaged from the interior of the L-shaped groove, enabling the triangular block to be released from the restriction and enter the vertical part of the L-shaped groove through the restoring force of the torsion spring, thus releasing the fixing effect of the heat exchange tubes. Then, the heat exchange tubes that need to be cleaned or replaced can be directly pulled out, thus solving the problem of inconvenient original operation and avoiding replacing the entire evaporation assembly. After that, the new or cleaned heat exchange tubes can be reinserted into the original position along the L-shaped groove and the positioning groove. After installing the top cover on the top of the evaporator main body, the plug board below will squeeze the triangular block back into the horizontal part of the L-shaped groove through the inclined plane to complete the fixation.

[0018] In this utility model, for the environmentally friendly MVR evaporator, through the freely detachable evaporation assembly, when it is necessary to clean or replace some of the heat exchange tubes, the corresponding heat exchange tubes can be directly removed, thus facilitating the cleaning operation and eliminating the need to replace the entire evaporation assembly, thereby reducing the labor intensity and the subsequent maintenance cost;

[0019] In this utility model, for the environmentally friendly MVR evaporator, through the triangular block and the plug board, the plug-in heat exchange tubes can be limited and fixed, thus ensuring the stability during use. When the top cover is opened, the limiting state of the fixed triangular block will be automatically released, thus releasing the fixation;

[0020] In this utility model, during use, the heated stock solution can exchange heat with the steam when passing through the heat exchange tubes, thus entering the evaporation state. When scale forms inside the heat exchange tubes during evaporation, affecting the heat transfer efficiency or even causing blockage, just opening the top cover can directly release the fixed state of multiple heat exchange tubes, and then directly remove the heat exchange tubes that need to be cleaned or replaced, thereby increasing the effect and reducing the subsequent maintenance cost. Description of the Drawings

[0021] Figure 1 Schematic diagram of the main structure of an environmentally friendly MVR evaporator proposed by the present utility model;

[0022] Figure 2 Schematic sectional view of the evaporator main body of an environmentally friendly MVR evaporator proposed by the present utility model;

[0023] Figure 3 Three-dimensional structure diagram of the heat exchange tubes of an environmentally friendly MVR evaporator proposed by the present utility model;

[0024] Figure 4 Three-dimensional structure diagram of the upper mounting circular plate of an environmentally friendly MVR evaporator proposed by the present utility model;

[0025] Figure 5 Three-dimensional structure diagram of the lower mounting circular plate of an environmentally friendly MVR evaporator proposed by the present utility model;

[0026] Figure 6 Schematic sectional view of the bottom plate of an environmentally friendly MVR evaporator proposed by the present utility model.

[0027] In the figure: 1, evaporator main body; 2, first connecting pipe; 3, separator; 4, compressor; 5, third connecting pipe; 6, top cover; 7, outer cylinder; 8, bottom plate; 9, upper mounting circular plate; 10, heat exchange tubes; 11, lower mounting circular plate; 12, fixing ring; 13, triangular block; 14, rotating ring; 15, positioning block; 16, upper concave surface; 17, L-shaped groove; 18, upper through hole; 19, positioning groove; 20, lower concave surface; 21, lower through hole; 22, liquid distributor; 23, insertion plate; 24, inner cylinder; 25, second connecting pipe; 26, communication hole. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Embodiment

[0029] Referring to Figure 1 , an environmentally friendly MVR evaporator, which is used in the field of energy conservation and environmental protection, includes: an evaporator main body 1, a top cover 6, a separator 3, a compressor 4, and an evaporation assembly, etc. The evaporator main body 1 is the core part of the entire device, and a top cover 6 is installed on its top to enclose the internal space. Between the evaporator main body 1 and the separator 3, a fixed connection is achieved through the first connecting pipe 2, which is used to transport the steam generated in the evaporator main body 1 to the separator 3 for gas-liquid separation.

[0030] The separated gas enters the input end of the compressor 4 through the No. 2 connecting pipe 25, is pressurized by the compressor 4, and is then transported back to the inside of the evaporator body 1 through the No. 3 connecting pipe 5, so as to be recycled and reused, thereby effectively improving the energy utilization efficiency. Example

[0031] refer to Figures 2 - 5 , improved on the basis of Example 1: the evaporation assembly is the key part to realize the heat exchange of the raw liquid, and includes an upper mounting circular plate 9, a lower mounting circular plate 11 and a plurality of heat exchange tubes 10. The upper mounting circular plate 9 and the lower mounting circular plate 11 are respectively fixed on the top and bottom of the inner wall of the evaporator body 1, and a plurality of heat exchange tubes 10 are installed between the two circular plates. Among them, the bottom end of the heat exchange tube 10 is located inside the lower concave surface 20 and connected with the lower through hole 21 through the upper through hole 18 penetrating the upper mounting circular plate 9, and the fixing ring 12 on the outer wall of the heat exchange tube 10 is located inside the upper concave surface 16. Specifically, the heat exchange tube 10 is fixed by the cooperation of the L-shaped groove 17 and the triangular block 13.

[0032] In addition, the evaporation assembly further includes a bottom plate 8 and an outer cylinder 7, the outer cylinder 7 is fixed to the bottom of the top cover 6, and the bottom plate 8 is fixed to the bottom of the outer cylinder 7. The top ends of the plurality of heat exchange tubes 10 extend into the communication hole 26 of the bottom plate 8, and the communication hole 26 is provided with an inner cylinder 24, and the bottom end of the inner cylinder 24 extends into the interior of the heat exchange tube 10. At the same time, the bottom of the bottom plate 8 is provided with a plurality of plug-ins 23, which are located in the L-shaped groove 17 and cooperate with the triangular block 13 to further stabilize the position of the heat exchange tube 10.

[0033] Specifically, when the heat exchange tube 10 needs to be cleaned, the top cover 6 only needs to be opened, and the plug plate 23 fixed to the bottom of the bottom plate 8 will be disengaged from the inside of the L-shaped groove 17, so that the triangular block 13 is released from the restriction to enter the vertical part of the L-shaped groove 17 through the force of the torsion spring, thereby releasing the fixing effect of the heat exchange tube 10, and then the heat exchange tube 10 that needs to be cleaned or replaced can be directly pulled out, thereby solving the original operation inconvenience and avoiding replacing the entire evaporation component, and then the new or cleaned heat exchange tube 10 can be reinserted into the original position along the L-shaped groove 17. After the top cover 6 is installed to the top of the evaporator body 1, the plug plate 23 below will squeeze the triangular block 13 to the horizontal part of the L-shaped groove 17 and the rotation of the swivel 12 through the inclined surface to complete the fixation, and the positioning block 15 and the positioning groove 19 are used to position the heat exchange tube 10 and limit the rotation of the heat exchange tube 10.

[0034] Finally, a liquid distributor 22 is fixed to the inner wall of the outer cylinder 7 to evenly distribute the original liquid entering the evaporator body 1 to improve the evaporation efficiency.

[0035] However, as is well known to those skilled in the art, the working principle and wiring method of the compressor 4 are common knowledge and belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0036] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An environmentally friendly MVR evaporator, characterized in that, Comprising: An evaporator main body (1) and a top cover (6) installed on the top of the evaporator main body (1); A separator (3) for performing gas-liquid separation, and a first connecting pipe (2) is fixedly connected between the evaporator main body (1) and the separator (3); A compressor (4) for conveying the separated gas to the inside of the evaporator main body (1), a same second connecting pipe (25) is fixedly connected between the separator (3) and the input end of the compressor (4), and a same third connecting pipe (5) is fixedly connected between the output end of the compressor (4) and the evaporator main body (1); An evaporation assembly for performing heat exchange on the stock solution input into the inside of the evaporator main body (1), the evaporation assembly includes an upper mounting circular plate (9), a lower mounting circular plate (11) and a plurality of heat exchange tubes (10), the upper mounting circular plate (9) is fixedly arranged at the top of the inner wall of the evaporator main body (1), the lower mounting circular plate (11) is fixedly arranged at the bottom of the inner wall of the evaporator main body (1), and a plurality of the heat exchange tubes (10) are all installed between the upper mounting circular plate (9) and the lower mounting circular plate (11).

2. The environmentally friendly MVR evaporator according to claim 1, characterized in that, A plurality of upper concave surfaces (16) are formed on the surface of the upper mounting circular plate (9), upper through holes (18) are formed on the bottom inner wall of the upper concave surfaces (16), the tops of a plurality of the heat exchange tubes (10) respectively slide through the upper through holes (18) to the upper side of the upper mounting circular plate (9), a fixing ring (12) is fixedly sleeved on the outer wall of the heat exchange tube (10), and the fixing ring (12) is located inside the upper concave surface (16), a positioning block (15) is fixedly arranged on the outer wall of the fixing ring (12), and a positioning groove (19) is formed on the inner wall of the upper concave surface (16), and the positioning block (15) is located inside the positioning groove (19).

3. The environmentally friendly MVR evaporator according to claim 2, wherein A rotating ring (14) is rotatably arranged at the bottom of the fixing ring (12), and the rotating ring (14) is sleeved on the outer wall of the heat exchange tube (10), a torsion spring is arranged between the fixing ring (12) and the rotating ring (14), an L-shaped groove (17) is formed on the inner wall of the positioning groove (19), a triangular block (13) is fixedly arranged on the outer wall of the heat exchange tube (10), and the triangular block (13) is located inside the L-shaped groove (17).

4. An environmentally friendly MVR evaporator according to claim 3, characterized in that, A plurality of lower concave surfaces (20) are formed on the surface of the lower mounting circular plate (11), lower through holes (21) are formed on the bottom inner wall of the lower concave surfaces (20), the bottom ends of the heat exchange tubes (10) are inserted into the inside of the lower concave surfaces (20), and the lower through holes (21) are communicated with the heat exchange tubes (10).

5. An environmentally friendly MVR evaporator according to claim 4, characterized in that, The evaporation assembly further includes a bottom plate (8), an outer cylinder (7) is fixedly arranged at the bottom of the top cover (6), the bottom plate (8) is fixedly arranged at the bottom of the outer cylinder (7), a plurality of communication holes (26) are formed on the bottom of the bottom plate (8), the tops of a plurality of the heat exchange tubes (10) respectively extend into the inside of the plurality of communication holes (26), a plurality of insertion plates (23) are fixedly arranged at the bottom of the bottom plate (8), the plurality of insertion plates (23) are respectively located inside the plurality of L-shaped grooves (17), and the insertion plates (23) are matched with the adjacent triangular blocks (13).

6. An environmentally friendly MVR evaporator according to claim 5, characterized in that, An inner cylinder (24) is fixedly arranged on the inner wall of the communication hole (26), and the bottom end of the inner cylinder (24) extends into the interior of the heat exchange tube (10).

7. An environmentally friendly MVR evaporator according to claim 5, characterized in that, A liquid distributor (22) is fixedly arranged on the inner wall of the outer cylinder (7).

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