Low energy distillation water preparation system and distillation water machine

Abstract

The present application relates to a kind of low-energy distillation water preparation system and distilled water machine, low-energy distillation water preparation system includes evaporation component, water inlet pipeline, first heat exchanger, condensate discharge pipeline and first control member.Use, evaporator is heated by heating steam, and the raw material water input by water inlet pipeline is evaporated to form distilled water and steam, wherein heating steam and raw material water are heat exchanged in evaporator to form condensate and are discharged by condensate discharge pipeline, condensate is shunted into two parts when flowing along first main road, one part of condensate is heat exchanged with raw material water on first heat exchanger by first branch, another part of condensate flows along second branch and is discharged from system, so that the heat of condensate generated by heating steam can be effectively utilized, the energy consumption of system is reduced, and then the cost of distilled water preparation process is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical water preparation, in particular to a low-energy-consumption distilled water preparation system and a distilled water machine. BACKGROUND

[0002] In the medical industry, a large amount of distilled water is needed for the preparation of injection water. Distilled water is mainly formed by condensation after evaporation of raw water. A common distilled water preparation system is composed of evaporators, condensers and other elements. However, the energy consumption of traditional distilled water preparation systems and distilled water machines is high, resulting in high cost of distilled water preparation process. SUMMARY

[0003] Therefore, it is necessary to provide a low-energy-consumption distilled water preparation system and a distilled water machine to solve the problem of high energy consumption of the distilled water preparation system.

[0004] The technical scheme is as follows:

[0005] On the one hand, a low-energy-consumption distilled water preparation system is provided, which comprises an evaporation assembly, a water inlet pipeline, a first heat exchanger, a condensed water discharge pipeline and a first control member. The evaporation assembly is used to produce steam and distilled water by heating raw water with heating steam. The water inlet pipeline communicates with the evaporation assembly through the first heat exchanger to supply the evaporation assembly with the raw water. The condensed water discharge pipeline is used to discharge condensed water formed by heat exchange between the heating steam and the raw water in the evaporation assembly. The condensed water discharge pipeline comprises a first main pipeline, a first branch pipeline and a second branch pipeline. One end of the first main pipeline communicates with the evaporation assembly, and the other end of the first main pipeline simultaneously communicates with the first branch pipeline and the second branch pipeline. The first branch pipeline passes through the first heat exchanger to exchange heat between the condensed water in the first branch pipeline and the raw water in the first heat exchanger. The first branch pipeline is provided with the first control member to adjust the flow of the condensed water in the first branch pipeline. The second branch pipeline is used to discharge condensed water outside the distilled water system.

[0006] The technical scheme is further described as follows:

[0007] In one embodiment, the evaporation assembly comprises at least two evaporators connected in series. Each evaporator is provided with an inlet and an outlet. The outlet of the first evaporator in series communicates with the inlet of the second evaporator.

[0008] In one embodiment, the low-energy-consumption distilled water preparation system further comprises a distilled water discharge pipeline and a condensation assembly. One end of the distilled water discharge pipeline communicates with the evaporation assembly, and the other end of the distilled water discharge pipeline passes through the condensation assembly to exchange heat between the distilled water and the raw water in the condensation assembly.

[0009] In one of the embodiments, the low energy consumption distilled water preparation system further comprises a preheater, the preheater being in communication with the outlet of at least one of the evaporators, the distilled water discharge pipeline further being in communication with the preheater, and the water inlet pipeline further passing through the preheater so that the steam produced by the evaporator in communication with the preheater exchanges heat with the raw water in the preheater.

[0010] In one of the embodiments, the low energy consumption distilled water preparation system further comprises a steam discharge pipeline, the steam discharge pipeline comprising a second main branch, a third branch and a fourth branch, one end of the second main branch being in communication with the evaporation assembly, the other end of the second main branch being in communication with the third branch and the fourth branch at the same time, the third branch passing through the condensation assembly, and the fourth branch being used for discharging steam out of the low energy consumption distilled water preparation system, the water inlet pipeline further passing through the condensation assembly so that the steam in the third branch exchanges heat with the raw water in the condensation assembly.

[0011] In one of the embodiments, the fourth branch is provided with a check valve to avoid the steam in the fourth branch flowing to the third branch.

[0012] In one of the embodiments, the low energy consumption distilled water preparation system further comprises a concentrated water discharge pipeline and a second heat exchanger, the concentrated water discharge pipeline being used for discharging the concentrated water formed after the evaporation of the raw water, one end of the concentrated water discharge pipeline being in communication with the evaporation assembly, the other end of the concentrated water discharge pipeline passing through the second heat exchanger, and the water inlet pipeline further passing through the second heat exchanger so that the concentrated water exchanges heat with the raw water in the second heat exchanger.

[0013] In one of the embodiments, the condensed water discharge pipeline is provided with a trap to avoid the heating steam flowing to the first heat exchanger.

[0014] In another aspect, a distilled water machine is provided, comprising the low energy consumption distilled water preparation system.

[0015] When the low energy consumption distilled water preparation system is used, the evaporator heated by the heating steam evaporates the raw water input from the water inlet pipeline to form distilled water and steam, the heating steam exchanges heat with the raw water in the evaporator to form condensed water which is discharged by the condensed water discharge pipeline, and the condensed water flows along the first main branch and is divided into two parts, one part of the condensed water exchanges heat with the raw water on the first heat exchanger through the first branch, and the other part of the condensed water flows along the second branch and is discharged out of the system, so that the heat of the condensed water produced by the heating steam can be effectively utilized, the energy consumption of the system is reduced, and the cost of the distilled water preparation process is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrate the

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 The system principle diagram of the low-energy-consumption distilled water preparation system according to an embodiment of the present application;

[0019] Figure 2 The structure diagram of the evaporator of the low-energy-consumption distilled water preparation system according to an embodiment of the present application; Figure 1

[0020] Figure 3 The structure diagram of the preheater of the low-energy-consumption distilled water preparation system according to an embodiment of the present application; Figure 1

[0021] Figure 4 The structure diagram of the first heat exchanger of the low-energy-consumption distilled water preparation system according to an embodiment of the present application; Figure 1

[0022] Figure 5 The structure diagram of the first condenser of the low-energy-consumption distilled water preparation system according to an embodiment of the present application. Figure 1 Explanation of reference signs:

[0023]

[0024] 100, evaporating assembly; 110, evaporator; 200, water inlet pipeline; 210, condensed water outlet pipeline; 211, first main branch; 212, first branch; 213, second branch; 220, steam outlet pipeline; 221, second main branch; 222, third branch; 223, fourth branch; 230, distilled water outlet pipeline; 231, first distilled water outlet pipeline; 232, second distilled water outlet pipeline; 240, concentrated water outlet pipeline; 300, first heat exchanger; 310, second heat exchanger; 400, condensing assembly; 410, first condenser; 420, second condenser; 500, first control member; 501, first flow valve; 502, second flow valve; 510, third flow valve; 520, second control member; 600, preheater; 700, trap; 710, check valve; 800, temperature sensor. DETAILED DESCRIPTION

[0025] ​​​​In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of 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 concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] As described in the background, a large amount of distilled water is needed in the pharmaceutical industry, which is mainly formed by condensation after evaporation of raw steam or raw water. The traditional distilled water preparation system usually includes the following steps: the raw water enters the evaporation assembly through the water inlet pipeline, the evaporation assembly is heated by the externally introduced heating steam as the energy source, the heating steam is cooled after heat exchange with the raw water in the evaporator to form condensed water, and at the same time the raw water is heated and evaporated. The raw water is converted into three parts after evaporation, the first part of the raw water is evaporated and condensed to form distilled water, the second part of the raw water is evaporated and not condensed to form secondary steam, and the third part of the raw water is concentrated to form concentrated water due to the evaporation of a large amount of water. Among them, the heating steam is industrial steam formed by heating industrial wastewater in a heating boiler.

[0027] At present, the common distillation technologies mainly include multi-effect distillation, mechanical vapor compression distillation (MVR), and thermal vapor compression distillation (TVR). Among them, multi-effect distillation is a distillation technology that uses the secondary steam obtained by evaporation in the previous effect evaporator as the heating steam of the next effect evaporator, mechanical vapor compression distillation is a distillation technology that uses an external energy source to drive a compressor to compress and increase the pressure of the secondary steam for reuse, and thermal vapor compression distillation is a distillation technology that uses a small amount of high-pressure steam as power to compress and increase the pressure of low-pressure secondary steam for reuse. However, for multi-effect distillation technology, the secondary steam produced by the last effect evaporator has no next effect evaporator, and a large amount of cooling water is needed to cool the uncondensed secondary steam of the last effect, resulting in high overall energy consumption of the equipment; for mechanical vapor compression distillation technology, the equipment investment cost is high, which is difficult to promote in the entire industry; for thermal vapor compression distillation technology, a large amount of high-pressure steam is consumed in the thermal vapor compression distillation process, but due to the low steam pressure in the pharmaceutical industry, the thermal pump can only produce a small amount of effective steam with high enthalpy, and the produced steam will actually reduce the evaporation temperature of the first effect evaporator after injection, so it is difficult to be utilized. Therefore, the energy consumption of the traditional three distillation technologies is high, resulting in high cost of the distilled water preparation process.

[0028] In view of the above problems, the present application provides a kind of distilled water preparation system and preparation method, which can solve the problems of high energy consumption and high cost of traditional distilled water preparation process. Figure 1As shown, in one embodiment, a low energy consumption distilled water preparation system is provided, comprising an evaporation assembly 100, a water inlet pipeline 200, a first heat exchanger 300, a condensed water discharge pipeline 210 and a first control member 500, the evaporation assembly 100 is used to produce steam and distilled water by heating steam to heat raw water, the water inlet pipeline 200 is communicated with the evaporation assembly 100 through the first heat exchanger 300 to input raw water into the evaporation assembly 100, the condensed water discharge pipeline 210 is used to discharge condensed water formed by the heat exchange between the heating steam and the raw water in the evaporation assembly 100, the condensed water discharge pipeline 210 comprises a first main pipeline 211, a first branch pipeline 212 and a second branch pipeline 213, one end of the first main pipeline 211 is communicated with the evaporation assembly 100, the other end of the first main pipeline 211 is communicated with the first branch pipeline 212 and the second branch pipeline 213 at the same time, the first branch pipeline 212 passes through the first heat exchanger 300 to make the condensed water on the first branch pipeline 212 exchange heat with the raw water in the first heat exchanger 300, the first control member 500 is arranged on the first branch pipeline 212 to adjust the flow of the condensed water on the first branch pipeline 212, and the second branch pipeline 213 is used to discharge the condensed water outside the distilled water system.

[0029] In the above low energy consumption distilled water preparation system, the first branch pipeline 212 and the second branch pipeline 213 can be communicated at the end away from the first main pipeline 211. In this way, the condensed water on the first branch pipeline 212 can be combined with the condensed water on the second branch pipeline 213 and then discharged by a pipeline, so that the pipeline structure is simpler.

[0030] In use of the above low energy consumption distilled water preparation system, the evaporator 110 is heated by the heating steam to evaporate the raw water input from the water inlet pipeline 200 to form distilled water and steam, wherein the heating steam exchanges heat with the raw water in the evaporator 110 to be cooled to form condensed water and then discharged by the condensed water discharge pipeline 210, when the condensed water flows along the first main pipeline 211, it is divided into two parts, one part of the condensed water exchanges heat with the raw water on the first heat exchanger 300 through the first branch pipeline 212, and the other part of the condensed water is discharged from the system through the second branch pipeline 213, so that the heat of the condensed water generated by the heating steam can be effectively utilized, the energy consumption of the system is reduced, and the cost of the distilled water preparation process is further reduced. Further, adjusting the first control member 500 in use of the above low energy consumption distilled water preparation system can control the flow of the condensed water on the first branch pipeline 212, so as to adjust the heat of the condensed water recovered into the system, then less distilled water and more steam are generated by evaporation, when the heat of the condensed water is mainly discharged from the system, the temperature of the raw water is lower and has lower energy, then less steam and more distilled water are generated by evaporation, and then the water production and steam production of the system are controlled.

[0031] As shown in the above low energy consumption distilled water preparation system, Figure 1As shown, in one embodiment, the evaporation assembly 100 can include at least two evaporators 110 connected in series, each of the evaporators 110 being provided with an inlet and an outlet, and the outlet of a former evaporator 110 being communicated with the inlet of a next evaporator 110. In this way, the at least two evaporators 110 connected in series form a multi-effect evaporation structure, and the last evaporator 110 is provided with a steam outlet to discharge low-pressure secondary steam. In use, steam is evaporated step by step through the multi-effect evaporators 110 to produce distilled water, and the steam produced by a former evaporator 110 is supplied to a next evaporator 110 to heat, thereby gradually increasing the conversion rate of the raw water. Moreover, since the pressure of the secondary steam gradually decreases in the multi-effect evaporation, the amount of steam pressure output by the last evaporator 110 can be changed by adjusting the number of evaporators 110 in the evaporation assembly 100 to adapt to the steam parameter requirements of the actual use conditions.

[0032] Further, as shown, Figure 1 The low-energy-consumption distilled water preparation system further includes a distilled water discharge pipeline 230 and a condensation assembly 400, one end of the distilled water discharge pipeline 230 being communicated with the evaporation assembly 100, and the other end of the distilled water discharge pipeline 230 passing through the condensation assembly 400 to exchange heat between the distilled water and the raw water in the condensation assembly 400. In this way, the high-temperature distilled water obtained after evaporation can exchange heat with the low-temperature raw water, so that the product temperature requirement can be met without additional cooling source for the distilled water, thereby saving the system energy consumption. Meanwhile, most of the heat of the distilled water is exchanged to the raw water in the heat exchange process, thereby improving the conversion rate of the raw water.

[0033] In this way, the distilled water produced by the multiple evaporators 110 can be collected in the distilled water discharge pipeline 230 and then exchanged in the condensation assembly 400, thereby simplifying the pipeline structure.

[0034] Further, as shown, Figure 1As shown, the low-energy distilled water preparation system further comprises a preheater 600, which is in communication with the outlet of at least one evaporator 110, and the distilled water discharge pipeline 230 is also in communication with the preheater 600, and the water inlet pipeline 200 also passes through the preheater 600 so that the steam produced by the evaporator 110 in communication with the preheater 600 exchanges heat with the raw water in the preheater 600. Among them, when the evaporation assembly 100 contains N evaporators 110, the number of preheaters 600 can be set to N-1, and the outlet of each evaporator 110 except the last evaporator 110 is in communication with a preheater 600, and the water inlet pipeline 200 is sequentially connected to all the preheaters 600. In this way, the high-temperature secondary steam produced by each evaporator 110 can exchange heat in each preheater 600 to form distilled water, avoiding the steam produced by each evaporator 110 reaching saturation pressure when entering the next evaporator 110, thereby facilitating the heating and evaporation of raw water. At the same time, most of the heat of the steam is exchanged to the raw water during the heat exchange process, thereby improving the evaporation efficiency of the raw water.

[0035] Further, as shown in Figure 1 The distilled water discharge pipeline 230 can include a first distilled water discharge pipeline 231 and a second distilled water discharge pipeline 232, the first distilled water discharge pipeline 231 is in communication with the evaporation assembly 100, and the second distilled water discharge pipeline 232 is in communication with the preheater 600. In this way, the distilled water formed in the evaporation assembly 100 and the distilled water formed in the preheater 140 can be divided into two pipelines, thereby facilitating the control of the distilled water in any one of the pipelines.

[0036] Further, as shown in Figure 1 The low-energy distilled water preparation system further comprises a steam discharge pipeline 220, which includes a second main pipeline 221, a third branch pipeline 222, and a fourth branch pipeline 223. One end of the second main pipeline 221 is in communication with the evaporation assembly 100, and the other end of the second main pipeline 221 is in communication with the third branch pipeline 222 and the fourth branch pipeline 223. The third branch pipeline 222 passes through the condensation assembly 400, and the fourth branch pipeline 223 is used to discharge steam outside the low-energy distilled water preparation system. The water inlet pipeline 200 also passes through the condensation assembly 400 so that the steam on the third branch pipeline 222 exchanges heat with the raw water in the condensation assembly 400. In this way, the steam can flow out of the system through the fourth branch pipeline 223 for air conditioning humidification or other preheating systems, or exchange heat with the raw water in the condensation assembly 400 to form distilled water through the third branch pipeline 222, thereby reducing system energy consumption.

[0037] Among them, the steam discharge pipeline 220 and the first distilled water discharge pipeline 230 can be connected after passing through the condensation assembly 400. In this way, the steam and distilled water after heat exchange in the condensation assembly 400 can be collected in the same pipeline and then discharged from the system together, thereby simplifying the pipeline structure.

[0038] Further, as shown in Figure 1 condenser 410, the third branch 222 passes through the second condenser 420 and then passes through the first condenser 410, and the water inlet pipeline 200 passes through the first condenser 410 and then passes through the second condenser 420. In this way, the steam discharged through the steam discharge pipeline 220 exchanges heat in the second condenser 420 to form distilled water, and then exchanges heat with the distilled water in the first distilled water discharge pipeline 230 in the first condenser 410 and the raw water, thereby avoiding the problem that the flow, pressure and other parameters of the distilled water formed by the steam exchange are difficult to control due to the phase change of the steam, and further facilitating the control of the water production of the system.

[0039] Further, as shown in Figure 1 the fourth branch 223 to adjust the flow of steam in the fourth branch 223. Specifically, the second control member 520 can include a fourth flow valve. By adjusting the opening of the second control member 520, the flow of steam in the fourth branch 223 can be controlled, thereby controlling the steam heat discharged from the system and returned to the system, and further adapting to the steam parameter requirements of the actual use condition. Preferably, the second control member 520 adopts a PID control mode, and the PID control has the advantages of simple principle, easy implementation, independent control parameters, and simple parameter selection, and thus the water production of the system can be accurately adjusted by using the PID control.

[0040] Further, as shown in Figure 1 The fourth branch 223 is provided with a check valve 710 to avoid the flow of steam to the third branch 222. In this way, the steam discharged through the third branch 222 can be prevented from flowing to the fourth branch 223, thereby avoiding the problem that the distilled water quality is polluted due to the doping of external impurities in the steam, and thus the hygiene grade requirement of the distilled water can be met.

[0041] Further, as shown in Figure 1As shown, the third branch 222 is equipped with a temperature sensor 800, and the third branch 222 passes through the condenser assembly 400 and then through the temperature sensor 800. The temperature sensor 800 is used to detect the temperature of the distilled water formed after the steam exchanges heat with the condenser assembly 400, and can send temperature data to the second control unit 520 according to the temperature. After receiving the temperature data, the second control unit 520 processes it into a control signal, thereby adjusting the opening degree of the second control unit 520 and regulating the steam flow rate. By adjusting the opening degree of the second control unit 520, the temperature of the cooling water can be controlled. Specifically, under the condition of sufficient steam flow, when the cooling water temperature is low, the opening degree of the second control unit 520 is reduced to reduce the steam flow rate, thereby prolonging the heat exchange time and increasing the cooling water temperature; when the cooling water temperature is high, the opening degree of the second control unit 520 is increased slightly to increase the steam flow rate, thereby reducing the heat exchange time and lowering the cooling water temperature.

[0042] like Figure 1 As shown, in one embodiment, the low-energy distilled water preparation system further includes a concentrated water discharge pipe 240 and a second heat exchanger 310. The concentrated water discharge pipe 240 is used to discharge the concentrated water formed after the raw water is evaporated. One end of the concentrated water discharge pipe 240 is connected to the evaporation assembly 100, and the other end of the concentrated water discharge pipe 240 passes through the second heat exchanger 310. The inlet pipe 200 also passes through the second heat exchanger 310 to allow the concentrated water and the raw water to exchange heat in the second heat exchanger 310. In this way, the heat in the high-temperature concentrated water is exchanged to the raw water, thereby improving the evaporation efficiency of the raw water.

[0043] like Figure 1 As shown, in one embodiment, the condensate drain line 210 may be equipped with a steam trap 700 to prevent heated steam from flowing to the first heat exchanger 300.

[0044] like ​As shown, in one embodiment, the first control member 500 comprises a first flow valve 501 and a second flow valve 502, which are respectively arranged on the two sides of the first heat exchanger 300. In this way, when the first flow valve 501 and the second flow valve 502 are simultaneously opened, the condensate water can flow through the first heat exchanger 300 from the first branch 212 and exchange heat with the raw water, and when the first flow valve 501 and the second flow valve 502 are simultaneously closed, the heat of the condensate water is completely discharged from the system through the second branch 213 and returned to the boiler, that is, the flow of the condensate water in the first branch 212 can be adjusted by adjusting the opening degree of the first flow valve 501 and the second flow valve 502. Further, the third flow valve 510 can also be arranged on the second branch 213, which can adjust the flow of the condensate water on the second branch 213 by adjusting the opening degree. Among them, each element of the first control member 500 can be liquid control, pneumatic control, electromagnetic control and other control modes. Preferably, the first control member 500 can select a pneumatic angle seat valve, which has the characteristics of sensitive response and accurate action, can accurately control the flow of gas and liquid, and thus realize accurate temperature control of the system.

[0045] In one embodiment, a distillation water machine is also provided, which comprises the low-energy-consumption distillation water preparation system of any of the above embodiments.

[0046] The heat of the condensate water on the first branch 212 of the above distillation water machine can be recovered to the system, which can effectively utilize the heat of the condensate water generated by the heating steam, thereby effectively utilizing the heat of the condensate water generated by the heating steam, reducing the energy consumption of the system, and further reducing the cost of the distillation water preparation process.

[0047] It should be noted that the low-energy-consumption distillation water preparation system and the distillation water machine of the above embodiments are not limited to use in the medical field, but can also be used in seawater evaporation, industrial wastewater treatment and other occasions that meet the use requirements.

[0048] It should be noted that "certain body" and "certain part" can be a part of "member", that is, "certain body" and "certain part" are integrally manufactured with other parts of the "member"; or it can be a separate member that can be separated from the "other parts of the member", that is, "certain body" and "certain part" can be independently manufactured, and then combined with "other parts of the member" to form a whole. The expression of the above "certain body" and "certain part" in the present application is only one embodiment, for the convenience of reading, and is not a limitation on the protection scope of the present application, as long as the above characteristics are included and the same effect is understood as the equivalent technical solutions of the present application.

[0049] It should be noted that the components included in the "unit", "component", "mechanism", "system" of the present application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components by the present application is only one embodiment, for the convenience of reading, and is not a limitation on the scope of protection of the present application, as long as the above components are included and the same effect is understood as the technical solution of the present application.

[0050] In the description of the present application, it should be understood that the 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 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 do not indicate or imply that the system or element referred to must be in a particular orientation, constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the 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.

[0053] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, the first feature "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed", "set", "secured" or "attached" to another element, it can be directly on the other element or an intervening element can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intervening element can also be present. Further, when an element is referred to as being "fixedly connected" to another element, the two elements can be fixed in a manner that can be detachable or can be fixed in a manner that is not detachable, as long as power transmission can be achieved, such as sleeving, clamping, integrally formed fixing, welding, etc., which can be achieved in the prior art and will not be described here. When an element is referred to as being perpendicular or approximately perpendicular to another element, it means that the ideal state of the two elements is perpendicular, but due to manufacturing and assembly, there can be a certain vertical error. The terms "perpendicular", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] It should also be understood that when interpreting the connection relationship or position relationship of an element, although it is not explicitly described, the connection relationship and position relationship are interpreted to include an error range, which should be within an acceptable deviation range of a specific value determined by a person skilled in the art. For example, "about", "approximately" or "substantially" can mean within one or more standard deviations, without limitation.

[0056] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0057] The above 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 noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A low energy distillation water production system, characterized by, The low-energy distilled water preparation system comprises: an evaporation assembly for producing steam and distilled water by heating raw water with the steam; a water inlet pipeline and a first heat exchanger, the water inlet pipeline being communicated with the evaporation assembly through the first heat exchanger to supply the raw water to the evaporation assembly; and a condensed water discharge pipeline for discharging condensed water formed by heat exchange between the raw water and the steam in the evaporation assembly, the condensed water discharge pipeline comprising a first main branch, a first branch and a second branch, one end of the first main branch being communicated with the evaporation assembly, the other end of the first main branch being communicated with the first branch and the second branch at the same time, the first branch passing through the first heat exchanger to heat exchange the condensed water in the first branch with the raw water in the first heat exchanger, the first branch being provided with the first control member to adjust the flow of the condensed water in the first branch, the second branch being used for discharging the condensed water out of the low-energy distilled water preparation system; the evaporation assembly comprises at least two evaporation devices connected in series, each of the evaporation devices being provided with a feed inlet and a feed outlet, the feed outlet of a former evaporation device being communicated with the feed inlet of a next evaporation device in series; the low-energy distilled water preparation system further comprises a distilled water discharge pipeline and a condensation assembly, one end of the distilled water discharge pipeline being communicated with the evaporation assembly, the other end of the distilled water discharge pipeline passing through the condensation assembly to heat exchange the distilled water with the raw water in the condensation assembly; the low-energy distilled water preparation system further comprises a preheater, the preheater being communicated with the feed outlet of at least one of the evaporation devices, the distilled water discharge pipeline being further communicated with the preheater, the water inlet pipeline further passing through the preheater to heat exchange the steam produced by the evaporation device communicated with the preheater with the raw water in the preheater; the low-energy distilled water preparation system further comprises a steam discharge pipeline, the steam discharge pipeline comprising a second main branch, a third branch and a fourth branch, one end of the second main branch being communicated with the evaporation assembly, the other end of the second main branch being communicated with the third branch and the fourth branch at the same time, the third branch passing through the condensation assembly, the fourth branch being used for discharging the steam out of the low-energy distilled water preparation system, the water inlet pipeline further passing through the condensation assembly to heat exchange the steam in the third branch with the raw water in the condensation assembly.

2. The low energy distillation water production system of claim 1, wherein, The fourth branch is provided with a check valve to avoid the steam in the fourth branch flowing to the third branch.

3. The low energy distillation water production system of claim 1, wherein, The low-energy distilled water preparation system further comprises a concentrated water discharge pipeline and a second heat exchanger, the concentrated water discharge pipeline being used for discharging concentrated water formed after evaporation of the raw water, one end of the concentrated water discharge pipeline being communicated with the evaporation assembly, the other end of the concentrated water discharge pipeline passing through the second heat exchanger, the water inlet pipeline further passing through the second heat exchanger to heat exchange the concentrated water with the raw water in the second heat exchanger.

4. The low energy distillation water production system of claim 1, wherein, The condensed water discharge pipeline is provided with a trap to avoid the steam flowing to the first heat exchanger.

5. The low energy distillation water production system of claim 1, wherein, The first control device comprises a first flow valve and a second flow valve, and the first flow valve and the second flow valve are respectively arranged on two sides of the first heat exchanger.

6. A water distiller characterized by comprising: The low-energy-consumption distilled water preparation system comprises the low-energy-consumption distilled water preparation system according to any one of claims 1 to 5.

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