MVR concentration system

Abstract

The utility model discloses an MVR (Mechanical Vapor Recompression) concentration system which comprises a first-stage concentration tower, a steam outer pipe fixedly sleeved on the side part of the first-stage concentration tower, a compressor arranged at the upper end part of the first-stage concentration tower, a reboiler arranged on the side part of the first-stage concentration tower, a heat pump tower arranged on the side part of the reboiler, a tower top liquid tank arranged below the heat pump tower, and a tower bottom liquid tank arranged below the tower top liquid tank, the upper end part of the primary concentration tower is fixedly sleeved with a first pipeline, the output end of the compressor is fixedly sleeved with a second pipeline, and one end of the second pipeline is fixedly sleeved with the end part of the reboiler. By utilizing the mutual matching of the primary concentration tower, the compressor, the tower top liquid tank, the reboiler, the heat pump tower and the raw material pipe body, one part of condensate water passing through the reboiler flows back as the heat pump tower, and the other part of the condensate water enters the tower top liquid tank, so that waste steam at the tower top of the heat pump tower is favorably condensed into tower top water by circulating water; and meanwhile, the use amount of circulating water can be reduced by about 83%, and the power consumption of the circulating water cooling tower is also reduced.

Description

Technical Field

[0001] The utility model relates to the field of MVR concentration systems, in particular to an MVR concentration system. Background Art

[0002] DMF is usually an important organic solvent and chemical raw material. During the application process of DMF, wastewater containing DMF components will be generated, which is DMF wastewater. When part of the DMF wastewater needs to be utilized, a concentration system will be used.

[0003] The DMF wastewater is concentrated and evaporated using a concentration evaporation process. The concentration system usually includes a primary concentration tower, a secondary concentration tower, a heat pump tower and a distillation tower. After the DMF wastewater is concentrated using a heat pump tower, waste steam is usually generated. The existing technology usually discharges the waste steam, which wastes energy and is not convenient for recycling the waste steam from the heat pump tower, and has certain limitations. Utility Model Content

[0004] The purpose of the utility model is to provide an MVR concentration system to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an MVR concentration system, comprising:

[0006] A primary concentrating tower, wherein a steam outer pipe is fixedly sleeved on the side of the primary concentrating tower;

[0007] A compressor is disposed at the upper end of the primary concentrator, a reboiler is disposed at the side of the primary concentrator, a heat pump tower is disposed at the side of the reboiler, and a tower top liquid tank is disposed below the heat pump tower.

[0008] Preferably, a first pipeline is fixedly connected to the upper end of the first concentrator, one end of which is connected to the input end of the compressor, and a second pipeline is fixedly connected to the output end of the compressor, one end of which is fixedly connected to the end of the reboiler.

[0009] Preferably, a third pipeline is fixedly sleeved between the reboiler and the heat pump tower, a fourth pipeline is fixedly sleeved at the bottom of the first-stage concentrator tower, a fifth pipeline is fixedly inserted and connected to the side of the fourth pipeline, and the end of the fifth pipeline is fixedly sleeved to the bottom of the reboiler.

[0010] Preferably, a sixth pipeline is fixedly sleeved between the heat pump tower and the liquid tank at the top of the tower, and a raw material liquid pipe body is fixedly sleeved at the bottom of the heat pump tower.

[0011] Preferably, a reflux pump and a water outlet pump are provided on the side of the tower top liquid tank, a seventh pipeline is fixedly sleeved on the bottom of the tower top liquid tank, two eighth pipelines are fixedly inserted and connected to the top of the seventh pipeline, and one end of the two eighth pipelines is respectively sleeved with the input end of the reflux pump and the water outlet pump.

[0012] Preferably, the output end of the reflux pump is fixedly connected with a ninth pipeline, one end of which is fixedly connected with the side of the first-level concentration tower, and the output end of the water outlet pump is fixedly connected with a tenth pipeline, one end of which is fixedly connected with the main water outlet pipe.

[0013] Preferably, a circulation pump is provided between the first-stage concentrator and the reboiler, one end of the fourth pipeline is fixedly connected to the circulation pump, an eleventh pipeline is fixedly connected to the output end of the circulation pump, and one end of the eleventh pipeline is fixedly connected to the side of the reboiler.

[0014] Technical effects and advantages of the utility model:

[0015] The utility model utilizes the mutual cooperation of a primary concentration tower, a compressor, a tower top liquid tank, a reboiler, a heat pump tower and a raw material pipe body. The compressor compresses the steam generated by the primary concentration tower, and then enters the reboiler to provide a heat source for the heat pump tower for heating. A part of the condensed water passing through the reboiler is used as a reflux of the heat pump tower, and the other part enters the tower top liquid tank, which is beneficial to condense the waste steam at the tower top of the heat pump tower into tower top water through circulating water, which is convenient for improving thermal efficiency and saving energy. At the same time, it is beneficial to reduce the use of circulating water by about 83%, and also reduce the power consumption of the circulating water cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural block diagram of the MVR concentration system of the utility model.

[0017] Figure 2 It is a schematic diagram of the structure of the water outlet pump of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the reflux pump of the utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the circulation pump of the utility model.

[0020] In the figure: 1. First-stage concentration tower; 2. Compressor; 3. Reboiler; 4. Heat pump tower; 5. Raw liquid pipe body; 6. Steam outer pipe; 7. Tower top liquid tank; 8. Reflux pump; 9. Water outlet pump; 10. Circulation pump; 11. Main water outlet pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-4 An MVR concentration system shown includes a primary concentration tower 1, and a steam outer pipe 6 is fixedly sleeved on the side of the primary concentration tower 1, which is convenient for connecting with an external steam pipeline, and further convenient for transporting steam from the inside of the steam outer pipe 6 to the inside of the primary concentration tower 1.

[0023] Furthermore, a compressor 2 is provided at the upper end of the first-stage concentration tower 1, and the compressor 2 is conducive to increasing the pressure and temperature of the tower top steam. A reboiler 3 is provided at the side of the first-stage concentration tower 1, and the reboiler 3 is conducive to condensing the tower top waste steam. A heat pump tower 4 is provided at the side of the reboiler 3, and a tower top liquid tank 7 is provided below the heat pump tower 4. The tower top liquid tank 7 is conducive to storing the converted condensed water. When the heat pump concentration is performed, the waste water from the clear liquid tank enters the heat pump tower 4 after heat exchange, and the top of the heat pump tower 4 will produce waste steam. Then the steam enters the first-stage concentrator 1, is discharged from the top of the first-stage concentrator 1, enters the compressor 2, is compressed to increase the pressure and temperature, and then enters the reboiler 3 to provide a heat source for the heat pump tower 4 for heating. A part of the condensed water after the reboiler condenser 3 is used as the reflux of the heat pump tower 4, and a part enters the top liquid tank 7. Circulating water was originally used as the cooling medium here. After improvement, 60% of the circulating water consumption can be saved. The concentrated liquid of the heat pump tower 4 is discharged to the first-stage concentrator 1.

[0024] Specifically, a first pipeline is fixedly connected to the upper end of the first-stage concentration tower 1, and the first pipeline is conducive to allowing steam to enter the interior of the compressor 2 from the interior thereof for pressure and temperature increase operations. One end of the first pipeline is connected to the input end of the compressor 2, and a second pipeline is fixedly connected to the output end of the compressor 2. The second pipeline is conducive to allowing the compressed steam to enter the interior of the reboiler 3 for condensation treatment of the steam, and one end of the second pipeline is fixedly connected to the end of the reboiler 3.

[0025] Specifically, a third pipeline is fixedly connected between the reboiler 3 and the heat pump tower 4. The third pipeline is conducive to discharging the condensed water generated after the steam is cooled from the inside thereof, and then entering the inside of the heat pump tower 4 for reflux. A fourth pipeline is fixedly connected to the bottom of the first-stage concentrator 1, which is conducive to the output of the concentrated liquid so that the reboiler 3 can carry out condensation treatment. The side of the fourth pipeline is fixedly inserted with a fifth pipeline, and the end of the fifth pipeline is fixedly connected to the bottom of the reboiler 3.

[0026] Specifically, a sixth pipeline is fixedly connected between the heat pump tower 4 and the top liquid tank 7, and the sixth pipeline is conducive to allowing a portion of the condensed water entering the heat pump tower 4 to enter the top liquid tank 7 for storage. A raw material liquid pipe body 5 is fixedly connected to the bottom of the heat pump tower 4, which is conducive to allowing the raw material in the clear liquid tank to enter the heat pump tower 4 for heat pump operation.

[0027] Specifically, a reflux pump 8 and a water outlet pump 9 are provided on the side of the tower top liquid tank 7. The reflux pump 8 is conducive to the reflux operation of the condensed water, and the water outlet pump 9 is conducive to the discharge of the condensed water. The bottom of the tower top liquid tank 7 is fixedly sleeved with a seventh pipeline, and the seventh pipeline is conducive to the output of the condensed water. The top of the seventh pipeline is fixedly inserted with two eighth pipelines, which is conducive to the diversion treatment of the condensed water. One end of the two eighth pipelines is respectively sleeved with the input end of the reflux pump 8 and the water outlet pump 9, and the output end of the reflux pump 8 is fixedly sleeved with a ninth pipeline, which is conducive to the connection with the first-level concentration tower 1. One end of the ninth pipeline is fixedly sleeved with the side of the first-level concentration tower 1, and the output end of the water outlet pump 9 is fixedly sleeved with a tenth pipeline, which is conducive to the discharge operation of the condensed water. One end of the tenth pipeline is fixedly inserted with a main water outlet pipe 11.

[0028] Specifically, a circulation pump 10 is arranged between the first-stage concentrator 1 and the reboiler 3. The circulation pump 10 is conducive to the circulation of the liquid discharged from the bottom of the first-stage concentrator 1, so that the liquid enters the interior of the reboiler 3 and then enters the interior of the first-stage concentrator 1. One end of the fourth pipeline is fixedly connected with the circulation pump 10, and the output end of the circulation pump 10 is fixedly connected with the eleventh pipeline. The eleventh pipeline is conducive to connecting the circulation pump 10 with the reboiler 3. One end of the eleventh pipeline is fixedly connected with the side of the reboiler 3.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An MVR concentration system, comprising: A primary concentration tower (1), wherein a steam outer pipe (6) is fixedly sleeved on the side of the primary concentration tower (1); It is characterized in that a compressor (2) is provided at the upper end of the first-stage concentrator (1), a reboiler (3) is provided at the side of the first-stage concentrator (1), a heat pump tower (4) is provided at the side of the reboiler (3), and a tower top liquid tank (7) is provided below the heat pump tower (4).

2. The MVR concentration system according to claim 1, characterized in that: A first pipeline is fixedly sleeved on the upper end of the primary concentration tower (1), one end of the first pipeline is sleeved on the input end of the compressor (2), a second pipeline is fixedly sleeved on the output end of the compressor (2), one end of the second pipeline is fixedly sleeved on the end of the reboiler (3).

3. The MVR concentration system according to claim 1, characterized in that: A third pipeline is fixedly sleeved between the reboiler (3) and the heat pump tower (4), a fourth pipeline is fixedly sleeved at the bottom of the first-stage concentrator (1), a fifth pipeline is fixedly inserted and connected to the side of the fourth pipeline, and an end of the fifth pipeline is fixedly sleeved to the bottom of the reboiler (3).

4. The MVR concentration system according to claim 1, characterized in that: A sixth pipeline is fixedly sleeved between the heat pump tower (4) and the tower top liquid tank (7), and a raw material liquid pipe body (5) is fixedly sleeved at the bottom of the heat pump tower (4).

5. The MVR concentration system according to claim 1, characterized in that: A reflux pump (8) and a water outlet pump (9) are arranged on the side of the tower top liquid tank (7); a seventh pipeline is fixedly sleeved on the bottom of the tower top liquid tank (7); two eighth pipelines are fixedly inserted and connected to the top of the seventh pipeline; one end of the two eighth pipelines is sleeved on the input end of the reflux pump (8) and the input end of the water outlet pump (9), respectively.

6. The MVR concentration system according to claim 5, characterized in that: The output end of the reflux pump (8) is fixedly sleeved with a ninth pipeline, one end of which is fixedly sleeved with the side of the primary concentration tower (1), and the output end of the water outlet pump (9) is fixedly sleeved with a tenth pipeline, one end of which is fixedly inserted and connected with a main water outlet pipe (11).

7. The MVR concentration system according to claim 3, characterized in that: A circulation pump (10) is provided between the first-stage concentrator (1) and the reboiler (3), one end of the fourth pipeline is fixedly sleeved with the circulation pump (10), an eleventh pipeline is fixedly sleeved at the output end of the circulation pump (10), and one end of the eleventh pipeline is fixedly sleeved with the side of the reboiler (3).

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