Low-temperature evaporation equipment

Abstract

The low-temperature evaporation equipment comprises an evaporator, and the evaporator is provided with an industrial steam inlet; the condensed water heat exchanger is communicated with a first discharge port of the evaporator through a first pipeline; the condenser is communicated with a second discharge port of the evaporator through a second pipeline, and the condenser is communicated with the condensed water heat exchanger; the water storage assembly is communicated with the condenser; and the vacuum assembly is communicated with the water storage assembly. The condensed water heat exchanger is further communicated with the condenser, so that steam subjected to primary heat exchange in the condensed water heat exchanger further flows into the condenser, secondary steam is reused, low-level energy is ensured to be fully utilized, the energy utilization rate is greatly increased, the use amount of high-temperature industrial steam is reduced, and energy consumption is reduced. The economical efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distillation purification or distillation concentration, and particularly relates to a low-temperature evaporation device. BACKGROUND

[0002] Multi-effect distillation and MVR distillation are widely applied in the fields of distillation purification and distillation concentration due to energy saving and consumption reduction, but a simple and stable evaporation process needs to be found because a large amount of industrial steam needs to be consumed in the evaporation process.

[0003] In the traditional technology, the secondary steam of multi-effect distillation cannot be reused, and the low-level energy of the system cannot be fully utilized, so that the overall energy consumption is high and the economy is poor. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a low-temperature evaporation device aiming at the problems of low energy utilization efficiency and high energy consumption.

[0005] The present application provides a low-temperature evaporation device, which comprises:

[0006] An evaporator, which is provided with an industrial steam inlet;

[0007] A condensate heat exchanger, which is communicated with a first discharge port of the evaporator through a first pipeline;

[0008] A condenser, which is communicated with a second discharge port of the evaporator through a second pipeline, and the condenser is communicated with the condensate heat exchanger;

[0009] A water storage assembly, which is communicated with the condenser; and

[0010] A vacuum assembly, which is communicated with the water storage assembly.

[0011] When the low-temperature evaporation device works, the vacuum assembly is started, and the external industrial steam is input into the evaporator through the industrial steam inlet. A part of high-temperature steam flows into the condensate heat exchanger through the first pipeline to realize the first utilization of the steam heat in the condensate heat exchanger. Another part of high-temperature steam also flows into the condenser through the second pipeline to realize the second utilization of the steam heat in the condenser. At the same time, because the condensate heat exchanger is also communicated with the condenser, the steam that has been once heat-exchanged in the condensate heat exchanger further flows into the condenser, so that the secondary steam is reused, the low-level energy is fully utilized, the energy utilization rate is greatly improved, the use amount of high-temperature industrial steam is reduced, the energy consumption is reduced, and the economy is improved.

[0012] The technical scheme of the present application is further described below:

[0013] In one of the embodiments, the water storage assembly comprises a buffer tank, the buffer tank is in communication with the condenser, and the buffer tank is in communication with the vacuum assembly.

[0014] In one of the embodiments, the water storage assembly further comprises a liquid storage tank, the liquid storage tank is in communication with the buffer tank through a third pipeline.

[0015] In one of the embodiments, the water storage assembly further comprises a distilled water heat exchanger, the liquid storage tank is in communication with the distilled water heat exchanger through a fourth pipeline, the distilled water heat exchanger is provided with a liquid inlet and a distilled water outlet, and the distilled water heat exchanger is in communication with the condenser.

[0016] In one of the embodiments, the water storage assembly further comprises a booster pump, the booster pump is connected in the fourth pipeline.

[0017] In one of the embodiments, the water storage assembly further comprises a first control valve, the first control valve is arranged in the third pipeline between the buffer tank and the liquid storage tank.

[0018] In one of the embodiments, the condensate water heat exchanger is provided with a condensate water outlet.

[0019] In one of the embodiments, the low-temperature evaporation device further comprises a second control valve and a third control valve, the second control valve is arranged in the first pipeline, and the third control valve is arranged in the second pipeline.

[0020] In one of the embodiments, the low-temperature evaporation device further comprises a cleaning water pipe and a cleaning assembly, one end of the cleaning water pipe is in communication with the liquid storage tank, the other end of the cleaning water pipe is in communication with the evaporator, and the cleaning assembly is arranged in the cleaning water pipe.

[0021] In one of the embodiments, the low-temperature evaporation device further comprises a compressed air valve and a compressed air pipeline, one end of the compressed air pipeline is in communication with the evaporator, the compressed air valve is arranged in the compressed air pipeline, and the evaporator is provided with a waste residue discharge port. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve the purpose of explaining the present application. The accompanying drawings should not be regarded as a limitation of the present application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0024] Figure 1 The structure diagram of the low-temperature evaporation equipment according to an embodiment of the present application.

[0025] Legend of reference signs:

[0026] 100, low-temperature evaporation equipment; 10, evaporator; 11, industrial steam inlet; 12, waste residue discharge port; 20, condensate heat exchanger; 21, condensate outlet; 20a, first pipeline; 30, condenser; 30a, second pipeline; 40, water storage assembly; 41, buffer tank; 42, liquid storage tank; 43, third pipeline; 44, distilled water heat exchanger; 44a, feed liquid inlet; 44b, distilled water outlet; 45, fourth pipeline; 46, booster pump; 47, first control valve; 50, vacuum assembly; 60, second control valve; 70, third control valve; 80, cleaning water pipe; 90, compressed air valve; 90a, compressed air pipeline. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In the present application, unless otherwise explicitly specified and limited, if there are terms such as "installation", "connection", "communication", "fixing" and the like, these terms should be broadly understood. For example, it can be fixed communication, or it can be detachable communication, or it can be integrated; it can be mechanical communication, or it can be electrical communication; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" of the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0032] It should be noted that if an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "communicated" to another element, it can be directly communicated to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of description, and do not represent the only implementation.

[0033] Referring to Figure 1 An embodiment of the present application shows a low-temperature evaporation device 100, which includes an evaporator 10, a condensate heat exchanger 20, a condenser 30, a water storage assembly 40 and a vacuum assembly 50.

[0034] The evaporator 10 is vertically installed and uses falling film evaporation process to realize large-flow falling film evaporation downward by gravity, so that the system is not easy to scale.

[0035] In addition, the evaporator 10 adopts shell side steam heating, has higher heat transfer efficiency, and can effectively reduce the risk of heating pipe fouling and maintain high heat transfer efficiency.

[0036] The evaporator 10 is provided with an industrial steam inlet 11. It is easy to understand that the industrial steam is provided by an external gas production device. The temperature of the industrial steam usually reaches 100-400℃, so it has abundant heat energy.

[0037] The condensate heat exchanger 20 is communicated with the first discharge port of the evaporator 10 through a first pipeline 20a; the condenser 30 is communicated with the second discharge port of the evaporator 10 through a second pipeline 30a, and the condenser 30 is communicated with the condensate heat exchanger 20; the water storage assembly 40 is communicated with the condenser 30; and the vacuum assembly 50 is communicated with the water storage assembly 40.

[0038] In summary, the implementation of the technical scheme of the embodiment will have the following beneficial effects: when the low-temperature evaporation device 100 of the scheme works, the vacuum assembly 50 is started, at the same time, the external industrial steam is input into the evaporator 10 through the industrial steam inlet 11, a part of the high-temperature steam flows into the condensate heat exchanger 20 through the first pipeline 20a to realize the first use of the steam heat in the condensate heat exchanger 20, and another part of the high-temperature steam also flows into the condenser 30 through the second pipeline 30a to realize the second use of the steam heat in the condenser 30. At the same time, since the condensate heat exchanger 20 is also communicated with the condenser 30, the steam that has been once heat-exchanged in the condensate heat exchanger 20 further flows into the condenser 30, thereby realizing the reuse of the secondary steam, ensuring that the low-level energy is fully utilized, greatly improving the energy utilization rate, reducing the use amount of high-temperature industrial steam, reducing energy consumption, and improving the economy.

[0039] Please continue to refer to Figure 1 In the present application, the water storage assembly 40 is mainly used for temporarily storing the distilled water generated by the high-temperature steam heat-exchanged and distilled. In an optional embodiment, the water storage assembly 40 includes a buffer tank 41, the buffer tank 41 is communicated with the condenser 30, and the buffer tank 41 is communicated with the vacuum assembly 50. The distilled water generated in the condenser 30 can flow into the buffer tank 41, and the buffer tank 41 realizes the buffering and temporary storage of the continuously flowing distilled water.

[0040] The buffer tank 41 is preferably made of medical-grade stainless steel material to avoid secondary pollution to the distilled water and to prevent itself from rusting and affecting the service life.

[0041] Distilled water refers to water that has been subjected to distillation and condensation. Distillation is a thermodynamic separation process that separates components in a mixture by taking advantage of the different boiling points of the components. The low-boiling components are evaporated and then condensed to separate the components. Compared with other separation methods such as extraction, filtration, and crystallization, distillation has the advantage of not requiring the use of solvents other than the system components, thereby ensuring that no new impurities are introduced.

[0042] Optionally, the outer wall of the buffer tank 41 is wrapped with noise reduction materials such as sound-absorbing cotton to eliminate the noise generated by the impact of distilled water on the side wall of the buffer tank 41.

[0043] Please continue to refer to Figure 1 Furthermore, the water storage assembly 40 further includes a storage tank 42, which is in communication with the buffer tank 41 through a third pipeline 43. The distilled water flowing into the buffer tank 41 can be further transmitted to the storage tank 42 for storage, so as to be used in subsequent production. Moreover, the combination of the storage tank 42 and the buffer tank allows the volumes of the two to be added together, thereby increasing the capacity of the distilled water that can be stored and improving the performance of the low-temperature distillation equipment.

[0044] In addition, in another optional embodiment, the water storage assembly 40 further includes a distilled water heat exchanger 44, which is in communication with the storage tank 42 through a fourth pipeline 45. The distilled water heat exchanger 44 is provided with a liquid inlet 44a and a distilled water outlet 44b, and is in communication with the condenser 30. The externally supplied liquid can flow into the distilled water heat exchanger 44 through the liquid inlet 44a, so that the distilled water flowing into the distilled water heat exchanger 44 exchanges heat with the liquid, and the liquid absorbs the residual heat of the distilled water to be preheated, effectively improving the preheating temperature of the liquid. Moreover, the low-temperature distilled water formed by heat exchange does not need subsequent cooling treatment, and can realize flexible adjustment of the temperature of the distilled water to match the distilled water discharged for different use conditions.

[0045] Based on any of the above embodiments, the water storage assembly 40 further includes a booster pump 46 connected to the fourth pipeline 45. The booster pump 46 is used to provide flow force for the distilled water discharged from the storage tank 42, so that the distilled water can flow more smoothly and effectively in the fourth pipeline 45 by overcoming the resistance of the pipe wall friction and the side wall friction of the heat exchanger.

[0046] Please continue to refer to Figure 1In addition, in another embodiment, the water storage assembly 40 further comprises a first control valve 47 arranged in the third pipeline 43 between the buffer tank 41 and the storage tank 42. By controlling the opening of the first control valve 47, distilled water can flow from the buffer tank 41 to the storage tank 42, and adjusting the opening degree of the first control valve 47 can flexibly adjust the flow of distilled water. When the storage tank 42 is full of water, the first control valve 47 is closed to cut off the third pipeline 43, so as to avoid overflow of water in the storage tank 42.

[0047] In one embodiment, the condensate water heat exchanger 20 is provided with a condensate water outlet 21. The condensate water generated in the condensate water heat exchanger 20 can be discharged from the condensate water outlet 21, so as to timely empty the condensate water heat exchanger 20 and ensure the continuous working performance of the condensate water heat exchanger 20.

[0048] Please continue to refer to Figure 1 Further, the low-temperature evaporation device 100 further comprises a second control valve 60 arranged in the first pipeline 20a and a third control valve 70 arranged in the second pipeline 30a. By controlling the second control valve 60 and the third control valve 70, the flow of steam into the condensate water heat exchanger 20 and the condenser 30 can be flexibly adjusted to meet different working conditions.

[0049] During use, impurities are inevitably present in the steam and the feed liquid. The impurities entering the evaporator 10 are likely to form scale on the wall of the heating pipe, which affects the heat transfer efficiency. In view of this, in an optional embodiment, the low-temperature evaporation device 100 further comprises a cleaning water pipe 80 and a cleaning assembly. One end of the cleaning water pipe 80 is in communication with the storage tank 42, the other end of the cleaning water pipe 80 is in communication with the evaporator 10, and the cleaning assembly is arranged in the cleaning water pipe 80. The cleaning assembly takes distilled water from the storage tank 42 and sprays the distilled water at a certain pressure from the cleaning water pipe 80 into the evaporator 10, so as to perform high-pressure flushing on the scale and thereby remove the scale from the wall, achieving the effect of online cleaning of the evaporator 10. Moreover, since the cleaning water is distilled water, the distilled water is clean and will not introduce impurities into the evaporator 10 again, ensuring the cleanliness of the evaporator 10.

[0050] Please continue to refer to Figure 1 Further, the low-temperature evaporation device 100 further comprises a compressed air valve 90 and a compressed air pipeline 90a. One end of the compressed air pipeline 90a is in communication with the evaporator 10, the compressed air valve 90 is arranged in the compressed air pipeline 90a, and the evaporator 10 is provided with a waste residue discharge port 12. After the compressed air valve 90 is opened, compressed air with high flow rate flows into the evaporator 10 through the compressed air pipeline 90a, so as to discharge the waste residue from the waste residue discharge port 12 out of the evaporator 10, achieving the effect of self-cleaning of the evaporator 10.

[0051] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0052] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A cryogenic evaporation apparatus, characterized in that, The low-temperature evaporation device comprises: an evaporator provided with an industrial steam inlet; a condensate heat exchanger in communication with a first discharge port of the evaporator through a first pipeline; a condenser in communication with a second discharge port of the evaporator through a second pipeline, and the condenser is in communication with the condensate heat exchanger; a water storage assembly in communication with the condenser; and a vacuum assembly in communication with the water storage assembly. The water storage assembly comprises a buffer tank in communication with the condenser, and the buffer tank is in communication with the vacuum assembly.

2. The cryogenic evaporation apparatus of claim 1, wherein The water storage assembly further comprises a liquid storage tank in communication with the buffer tank through a third pipeline.

3. The cryogenic evaporation apparatus according to claim 2, characterized in that, The water storage assembly further comprises a distilled water heat exchanger in communication with the liquid storage tank through a fourth pipeline, the distilled water heat exchanger is provided with a liquid inlet and a distilled water outlet, and the distilled water heat exchanger is in communication with the condenser.

4. The cryogenic evaporation apparatus according to claim 3, characterized in that, The water storage assembly further comprises a booster pump connected in the fourth pipeline.

5. The cryogenic evaporation apparatus according to claim 4, characterized in that, The water storage assembly further comprises a first control valve arranged in the third pipeline between the buffer tank and the liquid storage tank.

6. The cryogenic evaporation apparatus of claim 3, wherein The condensate heat exchanger is provided with a condensate outlet.

7. The cryogenic evaporation apparatus of claim 1, wherein The low-temperature evaporation device further comprises a second control valve arranged in the first pipeline and a third control valve arranged in the second pipeline.

8. The cryogenic evaporation apparatus of claim 1, wherein, The low-temperature evaporation device further comprises a cleaning water pipe and a cleaning assembly, one end of the cleaning water pipe is in communication with the liquid storage tank, the other end of the cleaning water pipe is in communication with the evaporator, and the cleaning assembly is arranged in the cleaning water pipe.

9. The cryogenic evaporation apparatus of claim 3, wherein, The low-temperature evaporation device further comprises a compressed air valve and a compressed air pipeline, one end of the compressed air pipeline is in communication with the evaporator, the compressed air valve is arranged in the compressed air pipeline, and the evaporator is provided with a waste residue discharge port.

10. The cryogenic evaporation apparatus of claim 9, wherein, ​

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