Energy-saving distilled water machine

Abstract

The present invention provides an energy-saving distilled water machine, which belongs to the technical field of distilled water manufacturing, and comprises: a first evaporator, a first vapor-liquid pre-separation device, a first separator, a second evaporator, a second vapor-liquid pre-separation device and a second separator. The present invention has the following beneficial effects: using raw steam to perform heat exchange with raw water, the obtained pure steam is used as high-temperature steam to perform heat exchange with concentrated water obtained after evaporation of the raw water, which can not only cool the pure steam to obtain distilled water, but also allow the concentrated water to be evaporated again to produce another portion of pure steam, and the pure steam can be cooled to obtain another portion of distilled water, which greatly improves the distillation efficiency of the distilled water machine.

Description

Technical Field

[0001] The invention belongs to the technical field of distilled water manufacturing and relates to an energy-saving distilled water machine. Background Art

[0002] At present, most of the multi-effect distilled water machine equipment in the existing technology is single-effect evaporation, which uses a single set of evaporator, vapor-liquid pre-separation device and separator for evaporation. The ratio of steam consumption to water production is ≤0.25. It only uses industrial steam for evaporation once, and the evaporation efficiency is low, which has a large room for improvement. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to provide an energy-saving distilled water machine.

[0004] The purpose of the present invention can be achieved through the following technical solutions: An energy-saving distilled water machine, comprising:

[0005] a first evaporator, which is provided with a live steam inlet, a first steam condensate outlet, a first raw water inlet, a first concentrated water outlet, a first shell side and a first tube side, the live steam inlet is connected with the first steam condensate outlet through the first shell side, and the first raw water inlet and the first concentrated water outlet are both connected with the first tube side;

[0006] a first vapor-liquid pre-separation device, which is connected to the first evaporator and forms a first steam chamber, the first vapor-liquid pre-separation device is provided with a first intermediate steam outlet, and the first intermediate steam outlet is connected to the first tube side through the first steam chamber;

[0007] a first separator, which is provided with a first intermediate steam inlet, a secondary steam outlet and a second steam chamber, wherein the first intermediate steam inlet is connected to the first intermediate steam outlet, and the first intermediate steam inlet is connected to the secondary steam outlet through the second steam chamber;

[0008] A second evaporator is provided with a pure steam inlet, a distilled water outlet, a first concentrated water inlet, a second concentrated water outlet, a second shell side and a second tube side, wherein the pure steam inlet is connected to the secondary steam outlet, the pure steam inlet is connected to the distilled water outlet through the second shell side, and the first concentrated water inlet and the second concentrated water outlet are both connected to the second tube side;

[0009] a second vapor-liquid pre-separation device, which is connected to the second evaporator and forms a third steam chamber, the second vapor-liquid pre-separation device is provided with a second intermediate steam outlet, and the second intermediate steam outlet is connected to the second tube side through the third steam chamber;

[0010] The second separator is provided with a second intermediate steam inlet, multiple steam outlets and a fourth steam chamber, wherein the second intermediate steam inlet is connected to the second intermediate steam outlet, and the second intermediate steam inlet is connected to the multiple steam outlets through the fourth steam chamber.

[0011] In the above-mentioned energy-saving distilled water machine, it also includes a condenser, which is provided with multiple steam inlets, a steam exhaust port, a distilled water inlet, a total distilled water outlet, a first raw water outlet, a second raw water inlet, a first water chamber, a second water chamber and a fifth steam chamber. The multiple steam inlets are connected with the steam exhaust port through the fifth steam chamber, the distilled water inlet is connected with the total distilled water outlet through the first water chamber, the fifth steam chamber is connected with the first water chamber, and the first raw water outlet is connected with the second raw water inlet through the second water chamber.

[0012] In the above-mentioned energy-saving distilled water machine, it also includes a preheater, which is provided with a second raw water outlet, a third raw water inlet, a second steam condensate outlet, a first steam condensate inlet, a third water chamber and a fourth water chamber, the first raw water outlet is connected to the first raw water inlet, the second raw water outlet is connected to the third raw water inlet through the third water chamber, the first steam condensate inlet is connected to the first steam condensate outlet, and the first steam condensate inlet is connected to the second steam condensate outlet through the fourth water chamber.

[0013] In the above-mentioned energy-saving distilled water machine, it also includes a cooler, which is provided with a third raw water outlet, a total raw water inlet, a second steam condensate inlet, a total steam condensate outlet, a fifth water chamber and a sixth water chamber, the second raw water outlet is connected to the second raw water inlet, the third raw water outlet is connected to the total raw water inlet through the fifth water chamber, the second steam condensate inlet is connected to the second steam condensate outlet, and the second steam condensate inlet is connected to the total steam condensate outlet through the sixth water chamber.

[0014] In the above-mentioned energy-saving distilled water machine, the first separator is also provided with a first condensate outlet, the first condensate outlet is connected to the second steam chamber, the first raw water inlet is connected to the first raw water outlet to form a first mixing pipe, and the first condensate outlet is connected to the first mixing pipe.

[0015] In the above-mentioned energy-saving distilled water machine, the number of the second evaporator, the second vapor-liquid pre-separation device and the second separator is at least two and the number is the same, the multiple steam outlet of the second separator is connected to the pure steam inlet of the adjacent second evaporator, and the first concentrated water inlet of the second evaporator is connected to the second concentrated water outlet of the adjacent second evaporator to form a second mixing pipe.

[0016] In the above-mentioned energy-saving distilled water machine, the second separator is further provided with a second condensate outlet, the second condensate outlet is communicated with the fourth steam chamber, and the second condensate outlet is communicated with the second mixing pipe.

[0017] In the above-mentioned energy-saving distilled water machine, the first vapor-liquid pre-separation device and the second vapor-liquid pre-separation device are also provided with a corrugated plate demister, the first steam chamber is connected with the first intermediate steam outlet through the corrugated plate demister in the first vapor-liquid pre-separation device, and the third steam chamber is connected with the second intermediate steam outlet through the corrugated plate demister in the first vapor-liquid pre-separation device.

[0018] In the above-mentioned energy-saving distilled water machine, the first separator and the second separator are provided with spiral channels, the first intermediate steam inlet is connected to the secondary steam outlet through the spiral channel in the first separator, and the second intermediate steam inlet is connected to the multiple steam outlets through the spiral channel in the second separator.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The raw steam is used for heat exchange with the raw water, and the obtained pure steam is used as high-temperature steam to exchange heat with the concentrated water obtained after the evaporation of the raw water. This can not only cool the pure steam to obtain distilled water, but also evaporate the concentrated water again to produce another portion of pure steam, and the pure steam can be cooled to obtain another portion of distilled water, which greatly improves the distillation efficiency of the water distiller.

[0021] 2. Use the raw water to distill the pure steam discharged from the second separator and entering the fifth steam chamber, and merge it with the distilled water obtained from the second evaporator to finally obtain distilled water that meets the discharge requirements.

[0022] 3. The preheater is set up to preheat the raw water that is about to enter the first evaporator using high-temperature steam condensate, thereby increasing the initial temperature of the raw water and improving the evaporation efficiency, and at the same time, the high-temperature steam condensate can be cooled.

[0023] 4. The cooler is set up to use the room temperature raw water that has just entered the machine to cool the steam condensate to be discharged, thereby reducing the temperature of the steam condensate to be discharged and at the same time increasing the initial temperature of the raw water.

[0024] 5. The plurality of second evaporators, second vapor-liquid pre-separation devices and second separators can be provided to perform multiple distillations, utilize the heat brought by the raw steam multiple times, and improve the overall evaporation efficiency of the distilled water machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the energy-saving distilled water machine of the present invention.

[0026] Figure 2 It is a schematic diagram of the flow direction of the raw steam of the present invention.

[0027] Figure 3 It is a schematic diagram of the flow direction of steam condensate of the present invention.

[0028] Figure 4 Schematic diagram of the flow direction of raw water of the present invention.

[0029] Figure 5 It is a schematic diagram of the flow direction of pure steam of the present invention.

[0030] Figure 6 It is a schematic diagram of the flow direction of condensed water of the present invention.

[0031] Figure 7 It is a schematic structural diagram of the first vapor-liquid pre-separation device and the second vapor-liquid pre-separation device of the present invention.

[0032] Figure 8 It is a schematic structural diagram of the first separator and the second separator of the present invention.

[0033] In the figure, 100, the first evaporator; 110, the raw steam inlet; 120, the first steam condensate outlet; 130, the first raw water inlet; 140, the first concentrated water outlet; 200, the first vapor-liquid pre-separation device; 210, the first intermediate steam outlet; 220, the spiral channel; 300, the first separator; 310, the first intermediate steam inlet; 320, the secondary steam outlet; 330, the first condensate outlet; 340, the corrugated plate demister; 400, the second evaporator; 410, the pure steam inlet; 420, the distilled water outlet; 430, the first concentrated water inlet; 440, the second concentrated water outlet; 500, the second vapor-liquid pre-separation device; 510, the second intermediate steam outlet; 600, second separator; 610, second intermediate steam inlet; 620, multiple steam outlets; 630, second condensate outlet; 700, condenser; 710, multiple steam inlets; 720, steam exhaust port; 730, distilled water inlet; 740, total distilled water outlet; 750, first raw water outlet; 760, second raw water inlet; 800, preheater; 810, second raw water outlet; 820, third raw water inlet; 830, second steam condensate outlet; 840, first steam condensate inlet; 900, cooler; 910, third raw water outlet; 920, total raw water inlet; 930, second steam condensate inlet; 940, total steam condensate outlet. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] like Figure 1-Figure 8 As shown, an energy-saving distilled water machine includes: a first evaporator 100, a first vapor-liquid pre-separation device 200, a first separator 300, a second evaporator 400, a second vapor-liquid pre-separation device 500 and a second separator 600.

[0041] Among them, the first evaporator 100 is provided with a raw steam inlet 110, a first steam condensate outlet 120, a first raw water inlet 130, a first concentrated water outlet 140, a first shell side (not shown in the figure) and a first tube side (not shown in the figure). The raw steam inlet 110 is connected to the first steam condensate outlet 120 through the first shell side, and the first raw water inlet 130 and the first concentrated water outlet 140 are both connected to the first tube side.

[0042] Among them, the first vapor-liquid pre-separation device 200 is connected to the first evaporator 100 and forms a first steam chamber (not shown in the figure), and the first vapor-liquid pre-separation device 200 is provided with a first intermediate steam outlet 210, and the first intermediate steam outlet 210 is connected to the first pipe side through the first steam chamber.

[0043] Among them, the first separator 300 is provided with a first intermediate steam inlet 310, a secondary steam outlet 320 and a second steam chamber (not shown in the figure), the first intermediate steam inlet 310 is connected to the first intermediate steam outlet 210, and the first intermediate steam inlet 310 is connected to the secondary steam outlet 320 through the second steam chamber.

[0044] Among them, the second evaporator 400 is provided with a pure steam inlet 410, a distilled water outlet 420, a first concentrated water inlet 430, a second concentrated water outlet 440, a second shell side (not shown in the figure) and a second tube side (not shown in the figure), the pure steam inlet 410 is connected with the secondary steam outlet 320, the pure steam inlet 410 is connected with the distilled water outlet 420 through the second shell side, and the first concentrated water inlet 430 and the second concentrated water outlet 440 are both connected with the second tube side.

[0045] Among them, the second vapor-liquid pre-separation device 500 is connected to the second evaporator 400 and forms a third steam chamber (not shown in the figure), and the second vapor-liquid pre-separation device 500 is provided with a second intermediate steam outlet 510, and the second intermediate steam outlet 510 is connected to the second pipe side through the third steam chamber.

[0046] In which, the second separator 600 is provided with a second intermediate steam inlet 610, multiple steam outlets 620 and a fourth steam chamber (not shown in the figure), the second intermediate steam inlet 610 is connected to the second intermediate steam outlet 510, and the second intermediate steam inlet 610 is connected to the multiple steam outlets 620 through the fourth steam chamber.

[0047] In this embodiment, raw steam is utilized to perform heat exchange with raw water, and the obtained pure steam is used as high-temperature steam to perform heat exchange with concentrated water obtained after evaporation of raw water. This not only enables the pure steam to be cooled to obtain distilled water, but also enables the concentrated water to be evaporated again to produce another portion of pure steam, which can be cooled to obtain another portion of distilled water, thereby greatly improving the distillation efficiency of the water distiller.

[0048] On the basis of the above embodiment, it also includes a condenser 700, and the condenser 700 is provided with multiple steam inlets 710, a steam exhaust port 720, a distilled water inlet 730, a total distilled water outlet 740, a first raw water outlet 750, a second raw water inlet 760, a first water chamber (not shown in the figure), a second water chamber (not shown in the figure) and a fifth steam chamber (not shown in the figure), the multiple steam inlets 710 are connected with the steam exhaust port 720 through the fifth steam chamber, the distilled water inlet 730 is connected with the total distilled water outlet 740 through the first water chamber, the fifth steam chamber is connected with the first water chamber, and the first raw water outlet 750 is connected with the second raw water inlet 760 through the second water chamber.

[0049] In this embodiment, the raw water is used to distill the pure steam discharged from the second separator 600 and entering the fifth steam chamber, and is combined with the distilled water obtained from the second evaporator 400 to finally obtain distilled water that meets the discharge requirements.

[0050] On the basis of the above embodiment, it also includes a preheater 800, and the preheater 800 is provided with a second raw water outlet 810, a third raw water inlet 820, a second steam condensate outlet 830, a first steam condensate inlet 840, a third water chamber (not shown in the figure) and a fourth water chamber (not shown in the figure), the first raw water outlet 750 is connected to the first raw water inlet 130, the second raw water outlet 810 is connected to the third raw water inlet 820 through the third water chamber, the first steam condensate inlet 840 is connected to the first steam condensate outlet 120, and the first steam condensate inlet 840 is connected to the second steam condensate outlet 830 through the fourth water chamber.

[0051] In this embodiment, the preheater 800 is set to preheat the raw water about to enter the first evaporator 100 using high-temperature steam condensate, thereby increasing the initial temperature of the raw water and improving the evaporation efficiency, and at the same time, the high-temperature steam condensate can be cooled.

[0052] On the basis of the above embodiment, it also includes a cooler 900, which is provided with a third raw water outlet 910, a total raw water inlet 920, a second steam condensate inlet 930, a total steam condensate outlet 940, a fifth water chamber (not shown in the figure) and a sixth water chamber (not shown in the figure), the second raw water outlet 810 is connected to the second raw water inlet 760, the third raw water outlet 910 is connected to the total raw water inlet 920 through the fifth water chamber, the second steam condensate inlet 930 is connected to the second steam condensate outlet 830, and the second steam condensate inlet 930 is connected to the total steam condensate outlet 940 through the sixth water chamber.

[0053] In this embodiment, the cooler 900 is set to cool the steam condensate to be discharged using the room temperature raw water just entering the machine, thereby reducing the temperature of the steam condensate to be discharged and increasing the initial temperature of the raw water.

[0054] Based on the above embodiment, the first separator 300 is also provided with a first condensate outlet 330, the first condensate outlet 330 is connected to the second steam chamber, the first raw water inlet 130 is connected to the first raw water outlet 750 to form a first mixing pipe (not marked in the figure), and the first condensate outlet 330 is connected to the first mixing pipe.

[0055] In this embodiment, the concentrated water discharged from the first concentrated water outlet 140 and the condensed water discharged from the first condensed water outlet 330 are combined in the mixing pipe and then participate in the next evaporation together, thereby reducing the waste of raw water.

[0056] On the basis of the above embodiment, the number of the second evaporator 400, the second vapor-liquid pre-separation device 500 and the second separator 600 are at least two and the number is the same, the multiple steam outlets 620 of the second separator 600 are connected to the pure steam inlet 410 of the adjacent second evaporator 400, and the first concentrated water inlet 430 of the second evaporator 400 is connected to the second concentrated water outlet 440 of the adjacent second evaporator 400 to form a second mixing pipe (not marked in the figure).

[0057] In this embodiment, multiple second evaporators 400, second vapor-liquid pre-separation devices 500 and second separators 600 are provided to perform multiple distillations, utilize the heat brought by the raw steam multiple times, and improve the overall evaporation efficiency of the water distiller.

[0058] On the basis of the above embodiment, the second separator 600 is further provided with a second condensate outlet 630 , and the second condensate outlet 630 is communicated with the fourth steam chamber, and the second condensate outlet 630 is communicated with the second mixing pipe.

[0059] In this embodiment, the concentrated water discharged from the second concentrated water outlet 440 and the condensed water discharged from the second condensed water outlet 630 are combined in the mixing pipe and then participate in the next evaporation together, thereby reducing the waste of raw water.

[0060] On the basis of the above-mentioned embodiment, the first vapor-liquid pre-separation device 200 and the second vapor-liquid pre-separation device 500 are further provided with a corrugated plate demister 340, the first steam chamber is connected with the first intermediate steam outlet 210 through the corrugated plate demister 340 in the first vapor-liquid pre-separation device 200, and the third steam chamber is connected with the second intermediate steam outlet 510 through the corrugated plate demister 340 in the first vapor-liquid pre-separation device 200.

[0061] In this embodiment, the steam-water mixture evaporated by heat exchange of the raw water in the first steam chamber or the third steam chamber can be separated into gas and liquid by the corrugated plate demister 340 to remove micro-water droplets and mist, and then discharged.

[0062] Based on the above embodiment, the first separator 300 and the second separator 600 are provided with a spiral channel 220, the first intermediate steam inlet 310 is connected to the secondary steam outlet 320 through the spiral channel 220 in the first separator 300, and the second intermediate steam inlet 610 is connected to the multiple steam outlet 620 through the spiral channel 220 in the second separator 600.

[0063] In this embodiment, the steam in the first separator 300 or the second separator 600 can be spirally separated from the liquid through the spiral channel 220 to obtain pure steam, and then discharged from the pure steam outlet. Under the action of the centrifugal force of high-speed rotation, the separation factor can reach several hundred times the powerful centrifugal force of gravitational acceleration, and the mist of tiny water droplets with a diameter of <50μm contained in the steam can be centrifugally separated along the spiral tangent direction and thrown to the isolation cylinder wall, and then gathered downward along the cylinder wall and discharged at the bottom of the separation chamber, thereby achieving a significantly ideal separation effect.

[0064] like Figure 1-Figure 8As shown, in terms of the overall working principle, high-temperature raw steam enters the first shell from the raw steam inlet 110 and exchanges heat with the raw water, and then becomes high-temperature steam condensate, which is discharged from the first steam condensate outlet 120, and then enters the fourth water chamber from the first steam condensate inlet 840 and exchanges heat with the raw water, and then is discharged from the second steam condensate outlet 830, and then enters the sixth water chamber from the second steam condensate inlet 930 and exchanges heat with the raw water, and then is discharged from the steam condensate total outlet 940; at the same time, room-temperature raw water enters the fifth water chamber from the raw water total inlet 920 and exchanges heat with steam condensate, and then is discharged from the third raw water outlet 910. The raw water is discharged from the third raw water inlet 820, and then enters the third water chamber and exchanges heat with the steam condensate, and then is discharged from the second raw water outlet 810, and then enters the second water chamber from the second raw water inlet 760 and exchanges heat with the distilled water and the pure steam, and then is discharged from the first raw water outlet 750, and then enters the first pipe pass from the first raw water inlet 130 and exchanges heat with the raw steam, and obtains concentrated water and pure steam; wherein the concentrated water remaining after evaporation is discharged from the first concentrated water outlet 140; wherein the pure steam is generated in the first steam chamber and discharged from the first intermediate steam outlet 210, and then enters the second steam chamber from the first intermediate steam inlet 310 and separates the water from the first steam chamber. The condensed water discharged from the first condensed water outlet 330 and the pure steam continue to be discharged from the secondary steam outlet 320, and then enter the second shell side from the pure steam inlet 410 and undergo heat exchange with the concentrated water, and become distilled water and are discharged from the distilled water outlet 420; the concentrated water discharged from the first concentrated water outlet 140 and the condensed water discharged from the first condensed water outlet 330 merge and enter the second tube side from the first concentrated water inlet 430 and undergo heat exchange with the pure steam, and obtain new concentrated water and new pure steam, which are discharged in the same manner as described above in the second evaporator 400, the second vapor-liquid pre-separation device 500 and the second separator 60 arranged in sequence. 0 for distillation and concentration; in the last group, the concentrated water discharged from the second concentrated water outlet 440 and the condensed water discharged from the second condensed water outlet 630 are directly discharged out of the machine after merging, while the pure steam is discharged from the multiple steam outlets 620 and enters the multiple steam inlet 710, and undergoes heat exchange with the raw water in the fifth steam chamber, the obtained distilled water enters the first water chamber, and the pure steam is discharged from the steam exhaust port 720; the distilled water discharged from the distilled water outlet 420 of all the second evaporators 400 is merged and enters the first water chamber from the distilled water inlet 730, and is merged with the distilled water obtained by distillation in the fifth steam chamber to obtain the final distilled water from the distilled water total outlet 740.

Claims

1. An energy-saving distilled water machine, characterized in that: include: a first evaporator, which is provided with a live steam inlet, a first steam condensate outlet, a first raw water inlet, a first concentrated water outlet, a first shell side and a first tube side, the live steam inlet is connected with the first steam condensate outlet through the first shell side, and the first raw water inlet and the first concentrated water outlet are both connected with the first tube side; a first vapor-liquid pre-separation device, which is connected to the first evaporator and forms a first steam chamber, the first vapor-liquid pre-separation device is provided with a first intermediate steam outlet, and the first intermediate steam outlet is connected to the first tube side through the first steam chamber; a first separator, which is provided with a first intermediate steam inlet, a secondary steam outlet and a second steam chamber, wherein the first intermediate steam inlet is connected to the first intermediate steam outlet, and the first intermediate steam inlet is connected to the secondary steam outlet through the second steam chamber; A second evaporator is provided with a pure steam inlet, a distilled water outlet, a first concentrated water inlet, a second concentrated water outlet, a second shell side and a second tube side, wherein the pure steam inlet is connected to the secondary steam outlet, the pure steam inlet is connected to the distilled water outlet through the second shell side, and the first concentrated water inlet and the second concentrated water outlet are both connected to the second tube side; a second vapor-liquid pre-separation device, which is connected to the second evaporator and forms a third steam chamber, the second vapor-liquid pre-separation device is provided with a second intermediate steam outlet, and the second intermediate steam outlet is connected to the second tube side through the third steam chamber; a second separator, which is provided with a second intermediate steam inlet, multiple steam outlets and a fourth steam chamber, wherein the second intermediate steam inlet is connected to the second intermediate steam outlet, and the second intermediate steam inlet is connected to the multiple steam outlets through the fourth steam chamber; The condenser is provided with multiple steam inlets, a steam exhaust port, a distilled water inlet, a total distilled water outlet, a first raw water outlet, a second raw water inlet, a first water chamber, a second water chamber, and a fifth steam chamber, wherein the multiple steam inlets are connected with the steam exhaust port through the fifth steam chamber, the distilled water inlet is connected with the total distilled water outlet through the first water chamber, the fifth steam chamber is connected with the first water chamber, and the first raw water outlet is connected with the second raw water inlet through the second water chamber; The distilled water discharged from the distilled water outlets of all the second evaporators merges and enters the first water chamber from the distilled water inlet; Pure steam is discharged from multiple steam outlets and enters multiple steam inlets, and undergoes heat exchange with raw water in the fifth steam chamber. The obtained distilled water enters the first water chamber, and pure steam is discharged from the steam exhaust port. It also includes a preheater, the preheater is provided with a second raw water outlet, a third raw water inlet, a second steam condensate outlet, a first steam condensate inlet, a third water chamber and a fourth water chamber, the first raw water outlet is connected to the first raw water inlet, the second raw water outlet is connected to the third raw water inlet through the third water chamber, the first steam condensate inlet is connected to the first steam condensate outlet, and the first steam condensate inlet is connected to the second steam condensate outlet through the fourth water chamber; It also includes a cooler, the cooler is provided with a third raw water outlet, a raw water total inlet, a second steam condensate inlet, a steam condensate total outlet, a fifth water chamber and a sixth water chamber, the second raw water outlet is connected to the second raw water inlet, the third raw water outlet is connected to the raw water total inlet through the fifth water chamber, the second steam condensate inlet is connected to the second steam condensate outlet, and the second steam condensate inlet is connected to the steam condensate total outlet through the sixth water chamber; Normal temperature raw water enters the fifth water chamber from the raw water main inlet and exchanges heat with steam condensate, then is discharged from the third raw water outlet, then enters the third water chamber from the third raw water inlet and exchanges heat with steam condensate.

2. An energy-saving distilled water machine as claimed in claim 1, characterized in that: The first separator is also provided with a first condensate outlet, which is connected to the second steam chamber, the first raw water inlet is connected to the first raw water outlet to form a first mixing pipe, and the first condensate outlet is connected to the first mixing pipe.

3. An energy-saving distilled water machine as claimed in claim 1, characterized in that: The number of the second evaporator, the second vapor-liquid pre-separation device and the second separator is at least two and the number is the same. The multiple steam outlets of the second separator are connected to the pure steam inlet of the adjacent second evaporator, and the first concentrated water inlet of the second evaporator is connected to the second concentrated water outlet of the adjacent second evaporator to form a second mixing pipe.

4. An energy-saving distilled water machine as claimed in claim 3, characterized in that: The second separator is further provided with a second condensate outlet, the second condensate outlet is communicated with the fourth steam chamber, and the second condensate outlet is communicated with the second mixing pipe.

5. The energy-saving distilled water machine according to claim 1, characterized in that: The first vapor-liquid pre-separation device and the second vapor-liquid pre-separation device are also provided with a corrugated plate demister, the first steam chamber is connected with the first intermediate steam outlet through the corrugated plate demister in the first vapor-liquid pre-separation device, and the third steam chamber is connected with the second intermediate steam outlet through the corrugated plate demister in the first vapor-liquid pre-separation device.

6. An energy-saving distilled water machine as claimed in claim 1, characterized in that: The first separator and the second separator are provided with a spiral channel, the first intermediate steam inlet is connected to the secondary steam outlet through the spiral channel in the first separator, and the second intermediate steam inlet is connected to the multiple steam outlet through the spiral channel in the second separator.

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