MVR evaporator

Abstract

The utility model relates to the technical field of cleaning equipment, in particular to an MVR evaporator which is provided with an evaporator body, the evaporator body is provided with a stock solution inlet pipe, a condensate water outlet pipe and a water vapor compression system, the stock solution inlet pipe is provided with a heat exchanger, the condensate water outlet pipe is provided with a condensate water tank, and the condensate water tank is provided with a heating jacket. The heat exchanger is used for recovering the heat of the condensed water in the condensed liquid outlet pipe and preheating the stock solution, so that the effective utilization of energy sources and the improvement of the evaporation efficiency are realized; through recycling of the water vapor compression system, the MVR evaporator remarkably reduces the requirement for external steam, and therefore energy is saved; by arranging the condensate water tank and the heating jacket of the condensate water tank, a necessary initial steam environment is provided for the evaporator in the starting stage, the starting process of the evaporator is accelerated, and the overall operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of MVR evaporators, in particular to an MVR evaporator. Background Art

[0002] The MVR evaporator, namely the mechanical vapor recompression evaporator, is an advanced evaporation technology that combines high efficiency, energy conservation and environmental protection. It cleverly utilizes the secondary steam generated during the evaporation process, compresses and heats it with a steam compressor, and then uses it directly as a heat source for the evaporation process of the material again, realizing the closed-loop recycling of thermal energy. The MVR evaporator shows broad application prospects in many industrial fields, including chemical industry, pharmaceutical industry, food industry, environmental protection, etc. In the environmental protection industry, the MVR evaporator is an important tool for wastewater treatment and resource recovery, helping enterprises achieve green production.

[0003] In the actual application of the MVR evaporator, although it shows significant energy-saving effects and economic benefits, however, in the startup stage of the evaporator, the insufficient initial steam supply directly affects whether the evaporator can quickly and stably reach the ideal operating state, prolongs the startup time, and reduces the overall operating efficiency; in addition, during the evaporation process, the steam condenses into water by releasing latent heat, and the condensed water is directly discharged without effective heat recovery, resulting in waste of thermal energy. Summary of the Invention

[0004] To solve the above problems, the present application provides an MVR evaporator, which is provided with an evaporator main body. A raw liquid inlet pipe and a condensed water outlet pipe are arranged on the evaporator main body. A water vapor compression system is also arranged on the evaporator main body. A heat exchanger is arranged on the raw liquid inlet pipe. The condensed water outlet pipe is connected to the heat exchanger. The condensed water outlet pipe is connected to a condensed water tank. A heating jacket is arranged on the condensed water tank. The condensed water tank is connected to the evaporator main body through a condensed water steam inlet pipe. A regulating valve is arranged on the condensed water steam inlet pipe.

[0005] In one embodiment, the heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are connected in series through a pipeline.

[0006] In one embodiment, the condensed water tank is connected to a metering tank through a condensed water pipeline. A pneumatic valve is arranged on the condensed water pipeline. A metering valve is arranged on the metering tank. The metering valve is connected to compressed air. The metering tank is connected to the second heat exchanger through a pipeline.

[0007] In one embodiment, a liquid level meter is arranged on the metering tank.

[0008] In one embodiment, the steam compression system is provided with a steam outlet pipe, the steam outlet pipe is connected to the MVR compressor, and the MVR compressor is connected to the main body of the evaporator through a steam inlet pipe.

[0009] In one embodiment, the heat exchanger is a shell and tube heat exchanger.

[0010] In one embodiment, the MVR compressor is a single screw compressor.

[0011] In one embodiment, a frame is further provided.

[0012] The beneficial effects of the present utility model are as follows:

[0013] An MVR evaporator of the present application is provided with a main body of the evaporator. A raw liquid inlet pipe, a condensate outlet pipe, and a steam compression system are arranged on the main body of the evaporator. A heat exchanger is arranged on the raw liquid inlet pipe, a condensate tank is arranged on the condensate outlet pipe, and a heating jacket is arranged on the condensate tank. In the initial stage of starting the evaporator, the heating jacket on the condensate tank starts to work to heat the condensate in the condensate tank. The steam generated by heating enters the main body of the evaporator through the condensate steam inlet pipe to provide an initial steam environment for the evaporator, helping the evaporator quickly enter the working state. The heat of the condensate in the condensate outlet pipe is recovered through the heat exchanger, and the raw liquid is preheated, realizing the effective utilization of energy and the improvement of evaporation efficiency; through the recycling of the steam compression system, the MVR evaporator significantly reduces the demand for external steam, thereby realizing energy conservation; by arranging the condensate tank and its heating jacket, a necessary initial steam environment is provided for the evaporator in the starting stage, accelerating the starting process of the evaporator and improving the overall operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view of the utility model;

[0015] Figure 2 is the structural schematic diagram of the utility model after removing the frame;

[0016] Explanation of symbols in the figures:

[0017] 1. Main body of the evaporator;

[0018] 2. Raw liquid inlet pipe;

[0019] 3. Condensate outlet pipe;

[0020] 4. Steam compression system; 41. Steam outlet pipe; 42. MVR compressor; 43. Steam inlet pipe;

[0021] 5. Heat exchanger; 51. First heat exchanger; 52. Second heat exchanger;

[0022] 6. Condensate tank; 61. Heating jacket; 62. Condensate steam inlet pipe; 63. Control valve; 64. Condensate pipe;

[0023] 7. Metering tank; 71. Pneumatic valve; 72. Metering valve;

[0024] 8. Frame. Specific implementation manner

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0026] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0027] As Figure 1 , 2 shown, an MVR evaporator is provided with an evaporator main body 1. A raw liquid inlet pipe 2 and a condensate outlet pipe 3 are provided on the evaporator main body 1. A steam compression system 4 is further provided on the evaporator main body 1. A heat exchanger 5 is provided on the raw liquid inlet pipe 2. The condensate outlet pipe 3 is connected to the heat exchanger 5. The condensate outlet pipe 3 is connected to a condensate tank 6. A heating jacket 61 is provided on the condensate tank 6. The condensate tank 6 is connected to the evaporator main body 1 through a condensate steam inlet pipe 62. A control valve 63 is provided on the condensate steam inlet pipe 62.

[0028] Specifically, the heat exchanger can be a shell-and-tube heat exchanger. At the initial start-up of the evaporator, the heating jacket 61 on the condensed water tank 6 starts to work, heating the condensed water in the condensed water tank, and the steam generated by the heating enters the evaporator body 1 through the condensed water steam inlet pipe 62, providing an initial steam environment for the evaporator and helping the evaporator to quickly enter the working state; the raw liquid to be treated enters the evaporator body 1 through the raw liquid inlet pipe 2, and the steam entering the evaporator body 1 exchanges heat with the raw liquid during the evaporation process, so that the water in the raw liquid evaporates, and the steam is then captured and compressed by the water vapor compression system 4. The temperature and pressure of the steam increase during the compression process, and the high-temperature and high-pressure steam is sent to the evaporator body 1 again to form a cycle, thereby realizing the reuse of steam, reducing the demand for external steam, and improving energy utilization efficiency. In the evaporator body 1, the steam exchanges heat with the raw liquid, the steam releases heat and condenses into water, and the condensed water flows out of the evaporator body 1 through the condensation outlet pipe 3, and the condensed water still maintains a high temperature when flowing out. The water in the condensate outlet pipe 3 is guided to the heat exchanger 5, where the high-temperature condensate exchanges heat with the raw liquid that is about to enter the evaporator body 1. Through the heat exchange process, the condensate releases its remaining heat to heat the raw liquid. The raw liquid is preheated to a higher initial temperature before entering the evaporator body 1. The temperature of the raw liquid preheated by the heat exchanger 5 is close to the working temperature in the evaporator body 1. The heat exchanger 5 recovers the heat of the condensate in the condensate outlet pipe 3 and preheats the raw liquid, thereby achieving effective utilization of energy and improved evaporation efficiency. Through the recycling of the water vapor compression system 4, the MVR evaporator significantly reduces the demand for external steam, thereby achieving energy conservation. By providing the condensate tank 6 and its heating jacket 61, the necessary initial steam environment is provided for the evaporator during the startup phase, which accelerates the startup process of the evaporator and improves the overall operating efficiency.

[0029] like Figure 2 As shown, the heat exchanger 5 includes a first heat exchanger 51 and a second heat exchanger 52, and the first heat exchanger 51 and the second heat exchanger 52 are connected in series through a pipeline.

[0030] Specifically, after the steam in the evaporator main body 1 exchanges heat with the stock solution, the steam condenses into water, and the condensed water flows out through the condensed water outlet pipe 3. The condensed water outlet pipe 3 is first connected to the inlet of the first heat exchanger 51. In the first heat exchanger 51, the condensed water exchanges heat with the stock solution about to enter the evaporator main body 1. The condensed water releases heat and heats the stock solution, thus achieving the initial recovery of heat. After passing through the first heat exchanger 51, the temperature of the condensed water decreases, but it still contains a certain amount of heat. The condensed water then flows into the second heat exchanger 52 through a pipeline. The condensed water continues to exchange heat with the stock solution, further releasing heat and heating the stock solution. By setting the first heat exchanger 51 and the second heat exchanger 52, it is ensured that the heat in the condensed water is recovered and utilized to the greatest extent, improving the evaporation efficiency and reducing the overall energy consumption.

[0031] As Figure 2 shown, the condensed water tank 6 is connected to the metering tank 7 through a condensed water pipeline 64. A pneumatic valve 71 is provided on the condensed water pipeline 64, and a metering valve 72 is provided on the metering tank 7. The metering valve 72 is connected to compressed air, and the metering tank 7 is connected to the second heat exchanger 52 through a pipeline.

[0032] Specifically, the condensed water generated in the evaporator main body 1 flows into the condensed water tank 6 through the condensed water pipeline 64 via the first heat exchanger 51. The condensed water tank 6 serves as a storage container, and the metering tank 7 is connected to the condensed water tank 6 through the condensed water pipeline 64. A measuring device is provided on the metering tank 7. The metering tank 7 can monitor the amount of condensed water in the condensed water tank 6 in real time. When the condensed water collected in the metering tank 7 reaches a predetermined amount, the control system closes the pneumatic valve 71. After closing the pneumatic valve 71, the control system starts the compressed air system connected to the metering valve 72. Compressed air is filled into the metering tank 7 through the metering valve 72, increasing the pressure inside the metering tank 7. The condensed water in the metering tank 7 is pushed through the pipeline into the second heat exchanger 52. The condensed water entering the second heat exchanger 52 exchanges heat with the stock solution, releasing its remaining heat and heating the stock solution, raising the initial temperature of the stock solution entering the evaporator main body 1, and the condensed water is discharged. When all the condensed water in the metering tank 7 is transferred to the second heat exchanger 52, the control system may reopen the pneumatic valve 71 to allow the condensed water in the condensed water tank 6 to continue flowing into the metering tank 7, starting a new round of condensed water collection.

[0033] As Figure 2 shown, a liquid level gauge is provided on the metering tank 7.

[0034] Specifically, the liquid level gauge can be a float type, capacitive type, ultrasonic type or other types of liquid level sensors, which can accurately convert the liquid level information into an electrical signal and transmit it to the control system. The liquid level gauge can accurately monitor the liquid level of the condensed water in the metering tank 7 to ensure that the pneumatic valve 71 is closed in time when the predetermined amount is reached.

[0035] As Figure 1 shown, the steam compression system 4 is provided with a steam outlet pipe 41, the steam outlet pipe 41 is connected to the MVR compressor 42, and the MVR compressor 42 is connected to the evaporator main body 1 through a steam inlet pipe 43.

[0036] Specifically, in the evaporator main body 1, the original liquid is heated and partially evaporated to generate water vapor. The generated water vapor is transported to the MVR compressor 42 through the steam outlet pipe 41 for compression. During the compression process, the volume of the water vapor decreases, and the pressure and temperature increase significantly. The compressed high-temperature and high-pressure water vapor is sent back to the evaporator main body 1 through the steam inlet pipe 43. The high-temperature and high-pressure water vapor serves as a heat source to exchange heat with the original liquid, and the water vapor releases the heat it carries, causing the original liquid to be further heated and evaporated. By compressing and reusing the water vapor through the MVR compressor 42, a closed-loop cycle of thermal energy is achieved, significantly improving the energy efficiency of the system.

[0037] The MVR evaporator is also provided with a frame 8. The frame 8 serves as the main support structure of the MVR evaporator, ensuring the stability and safety of the entire evaporation system during operation, bearing the weights of equipment such as the evaporator main body 1, the heat exchanger 5, and the condensate tank 6, and preventing displacement or damage caused by equipment vibration or external forces.

[0038] The MVR evaporator of the present application is provided with an evaporator main body 1, on which a raw liquid inlet pipe 2, a condensed water outlet pipe 3, and a steam compression system 4 are arranged. A heat exchanger 5 is arranged on the raw liquid inlet pipe 2, a condensed water tank 6 is arranged on the condensed water outlet pipe 3, and a heating jacket 61 is arranged on the condensed water tank 6. At the initial stage of the evaporator startup, the heating jacket 61 on the condensed water tank 6 starts to work, heating the condensed water in the condensed water tank. The steam generated by heating enters the evaporator main body 1 through the condensed water steam inlet pipe 62, providing an initial steam environment for the evaporator and helping the evaporator quickly enter the working state. The raw liquid to be processed enters the evaporator main body 1 through the raw liquid inlet pipe 2. The steam entering the evaporator main body 1 exchanges heat with the raw liquid during the evaporation process, causing the water in the raw liquid to evaporate. Subsequently, the steam is captured and compressed by the steam compression system 4. During the compression process, the temperature and pressure of the steam both increase. The high-temperature and high-pressure steam is sent into the evaporator main body 1 again to form a cycle. In the evaporator main body 1, the steam releases heat and condenses into water. The water in the condensate outlet pipe 3 is guided to the heat exchanger 5, where the high-temperature condensed water exchanges heat with the raw liquid about to enter the evaporator main body 1, heating the raw liquid. The raw liquid is preheated to a relatively high initial temperature before entering the evaporator main body 1. By using the heat exchanger 5 to recover the heat of the condensed water in the condensate outlet pipe 3 and preheat the raw liquid, the effective utilization of energy and the improvement of evaporation efficiency are achieved. Through the recycling of the steam compression system 4, the MVR evaporator significantly reduces the demand for external steam, thereby achieving energy conservation. By arranging the condensed water tank 6 and its heating jacket 61, a necessary initial steam environment is provided for the evaporator during the startup stage, accelerating the startup process of the evaporator and improving the overall operation efficiency.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can also be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. An MVR evaporator is provided with an evaporator main body (1). A raw liquid inlet pipe (2) and a condensed water outlet pipe (3) are arranged on the evaporator main body (1). A steam compression system (4) is also arranged on the evaporator main body (1). A heat exchanger (5) is arranged on the raw liquid inlet pipe (2). The condensed water outlet pipe (3) is connected to the heat exchanger (5). It is characterized in that, The condensate outlet pipe (3) is connected to the condensate tank (6). A heating jacket (61) is provided on the condensate tank (6). The condensate tank (6) is connected to the evaporator main body (1) through a condensate steam inlet pipe (62), and a regulating valve (63) is provided on the condensate steam inlet pipe (62).

2. The MVR evaporator according to claim 1, wherein The heat exchanger (5) includes a first heat exchanger (51) and a second heat exchanger (52). The first heat exchanger (51) and the second heat exchanger (52) are connected in series through a pipeline.

3. A MVR evaporator according to claim 1, characterized in that, The condensate tank (6) is connected to the metering tank (7) through a condensate pipeline (64). A pneumatic valve (71) is provided on the condensate pipeline (64). A metering valve (72) is provided on the metering tank (7). The metering valve (72) is connected to compressed air. The metering tank (7) is connected to the second heat exchanger (52) through a pipeline.

4. The MVR evaporator according to claim 3, characterized in that, A liquid level meter is provided on the metering tank (7).

5. A MVR evaporator according to claim 1, characterized in that, The steam compression system (4) is provided with a steam outlet pipe (41). The steam outlet pipe (41) is connected to the MVR compressor (42). The MVR compressor (42) is connected to the evaporator main body (1) through a steam inlet pipe (43).

6. A MVR evaporator according to claim 1, characterized in that, The heat exchanger (5) is a shell and tube heat exchanger.

7. The MVR evaporator according to claim 5, wherein, The MVR compressor (42) is a single screw compressor.

8. A MVR evaporator according to claim 1, characterized in that, A frame (8) is also provided.

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