Low-temperature evaporation condensing device

Abstract

The utility model discloses a low-temperature evaporation and condensation device and relates to the technical field of separation equipment. The device comprises a shell, a waste liquid box, an evaporation box and a steam box are sequentially and fixedly connected to the inner side of the shell from bottom to top, a condensation assembly is arranged on the uppermost portion in the shell, and a preheating assembly is further arranged on one side of the shell; the condensation assembly comprises a condensation box fixedly connected to the top of the steam box, and a plurality of first coiled pipes are fixedly connected to the interior of the condensation box from top to bottom at equal intervals. The steam heat in the condensing box is recycled through the first coiled pipe, inlet water of the steam box is preheated through the recycled heat, the problem that heat in steam is inconvenient to recycle in the prior art is solved, meanwhile, liquid in the preheating box is heated through the second coiled pipe and the third coiled pipe, and the heating efficiency is improved. And the raw materials in the feeding pipe are preheated through the preheating box, so that the problem that the to-be-evaporated raw materials are inconvenient to preheat at present is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of separation equipment, and particularly relates to a low-temperature evaporation and condensation device. Background Art

[0002] Separation equipment is mainly used for chemical reactions and material separation, heating and cooling, liquid extraction, gas absorption and other chemical and physical change processes in industrial production processes such as chemical industry, pharmacy, petroleum, food, etc. The low-temperature evaporation and condensation device is a relatively common separation equipment, which separates mixtures under high pressure and low temperature;

[0003] The prior art document with the publication number CN217780795U discloses a low-temperature evaporation and condensation system, including a heating device, an evaporation device, a condensation component and a suction device. In the evaporation device, the heated cooling medium is used to evaporate the waste liquid to form a waste liquid concentrate and vapor. In the condensation device, the cooled cooling medium is used to absorb the heat of the vapor to convert the vapor into a liquid. The suction device is used to suck the liquid in the third accommodation space into the liquid storage device, and is also used to suck the liquid in the liquid storage device to make the first accommodation space connected to the third accommodation space in a negative pressure state;

[0004] However, it still has the following drawbacks in actual use:

[0005] 1. In the above-mentioned low-temperature evaporation and condensation system, the evaporated steam is condensed by the condensation component, but it lacks a structure for recovering the heat in the steam, resulting in inconvenience in recovering and reusing the heat in the steam, thus causing relatively large heat loss;

[0006] 2. In the above-mentioned low-temperature evaporation and condensation system, the raw materials in the evaporation device are heated and evaporated by the heating device, so that the raw materials form a concentrate and vapor in the evaporation device, realizing the separation of the raw materials. However, it lacks a preheating structure, which is inconvenient for preheating the raw materials in the evaporation device, resulting in a long heating time and large energy consumption.

[0007] Therefore, we provide a low-temperature evaporation and condensation device to solve the above problems. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a low-temperature evaporation and condensation device, which recovers the heat of the steam in the condensation box through the first serpentine tube and preheats the water inlet of the steam box with the recovered heat, solving the problem that the existing heat in the steam is inconvenient to recover and reuse. At the same time, the liquid in the preheating box is heated through the second serpentine tube and the third serpentine tube, and the raw materials in the feed pipe are preheated through the preheating box, solving the problem that the existing raw materials to be evaporated are inconvenient to preheat.

[0009] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0010] The present utility model is a low-temperature evaporation and condensation device, including a housing. Inside the housing, a waste liquid tank, an evaporation tank, and a steam tank are fixedly connected in sequence from bottom to top. At the uppermost part inside the housing, a condensation component is provided, and a preheating component is also provided on one side of the housing;

[0011] The condensation component includes a condensation tank fixedly connected to the top of the steam tank. Inside the condensation tank, a plurality of first serpentine tubes are fixedly connected at equal intervals from top to bottom. The water inlet ends of the plurality of first serpentine tubes all penetrate through one outer wall of the condensation tank and are fixedly communicated with the same first water distributor. The top of the first water distributor is fixedly communicated with a water inlet pipe. The water outlet ends of the plurality of first serpentine tubes all penetrate through the other outer wall of the condensation tank and are fixedly communicated with the same first water combiner;

[0012] The preheating component includes a preheating tank, a second serpentine tube, and a third serpentine tube. The preheating tank is fixedly connected to one outer wall of the evaporation tank. A feed pipe penetrates through the inside of the preheating tank, and one end of the feed pipe extends into the inside of the evaporation tank. The front and rear ends of the preheating tank are fixedly communicated with a second water distributor and a second water combiner respectively through a fourth connecting pipe. The second water distributor and the second water combiner are fixedly communicated with the two ends of the second serpentine tube and the third serpentine tube through a fifth connecting pipe. The second serpentine tube and the third serpentine tube are respectively fixedly connected to the lower inside of the waste liquid tank and the steam tank.

[0013] A further setting of the present utility model is that a plurality of liquid outlet pipes penetrate through the front end face of the evaporation tank at equal intervals. The bottom ends of the liquid outlet pipes penetrate through the front end face of the waste liquid tank and extend to the upper inside of the waste liquid tank. Liquid outlet valves are provided on the liquid outlet pipes. A second flow guide block is fixedly connected to the lower inside of the evaporation tank. An atomization removal tank is fixedly connected to the other outer wall of the evaporation tank. A second connecting pipe is fixedly communicated with the lower part of one outer wall of the atomization removal tank. The top end of the second connecting pipe penetrates through one outer wall of the condensation tank and extends into the inside of the condensation tank. An exhaust pipe penetrates through one side of the top of the condensation tank.

[0014] A further setting of the present utility model is that the front and rear ends of the lower inside of the waste liquid tank are both fixedly connected with a first flow guide block. A plurality of drain pipes penetrate through the center position of the bottom of the waste liquid tank at equal intervals. Drain valves are provided at the bottom ends of the drain pipes.

[0015] A further setting of the present utility model is that a steam outlet pipe penetrates through the upper part of the outer wall of the atomization removal tank close to the evaporation tank. The end of the steam outlet pipe away from the atomization removal tank penetrates through the outer wall of the evaporation tank and is fixedly communicated with a collection cover. The collection cover is located above the inside of the evaporation tank.

[0016] The further setting of the present utility model is as follows: The upper parts of the front and rear end faces of the steam box are both penetrated by first connecting pipes. The bottom ends of the first connecting pipes respectively penetrate the upper parts of the front and rear end faces of the evaporation box and are fixedly communicated with steam inlet pipes. The steam inlet pipes are respectively located at the front and rear ends of the upper part inside the evaporation box. One end of each steam inlet pipe is fixedly communicated with a plurality of nozzles at equal intervals.

[0017] The further setting of the present utility model is as follows: A plurality of fins are sleeved on the outer wall of the first serpentine pipe at equal intervals, and a plurality of through holes are uniformly formed in the outer wall of the fins.

[0018] The further setting of the present utility model is as follows: A third connecting pipe is fixedly communicated with the lower part of the outer wall of one side of the first water combining device. The bottom end of the third connecting pipe penetrates the lower part of the outer wall of one side of the steam box and extends to the lower part inside the steam box.

[0019] The further setting of the present utility model is as follows: The feed pipe includes a sixth connecting pipe penetrating the outer wall of one side of the preheating box. One end of the sixth connecting pipe located inside the preheating box is fixedly communicated with a third water distributor. One end of the third water distributor far away from the sixth connecting pipe is fixedly communicated with a plurality of branch pipes. One end of each of the plurality of branch pipes far away from the third water distributor is fixedly communicated with the same third water combining device. One end of the third water combining device far away from the branch pipes is fixedly communicated with a seventh connecting pipe. One end of the seventh connecting pipe far away from the third water combining device sequentially penetrates the outer walls of the preheating box and the evaporation box and extends to the inside of the evaporation box.

[0020] The present utility model has the following beneficial effects:

[0021] 1. By setting the condensation assembly in the present utility model, the steam generated after the evaporation of the raw materials enters the inside of the condensation box through the demisting box. At the same time, the heat in the steam is recovered through the first serpentine pipe in the condensation box, and the steam is condensed into water. The water heated in the first serpentine pipe enters the steam box through the first water combining device and the third connecting pipe for heating, realizing the recovery of the waste heat of the steam generated by low-temperature evaporation and reducing the heat loss.

[0022] 2. By setting the preheating assembly in the present utility model, clear water is added into the preheating box. The clear water is evenly distributed into the second serpentine pipe and the third serpentine pipe through the second water distributor. The waste heat of the waste liquid in the waste liquid box is recovered through the second serpentine pipe, and a part of the heat in the steam box is absorbed through the third serpentine pipe, so that the water in the second serpentine pipe and the third serpentine pipe is heated. The heated water returns to the preheating box through the second water combining device and preheats the raw materials in the feed pipe, facilitating the preheating of the raw materials for low-temperature evaporation, thereby shortening the heating time of the raw materials and reducing the energy consumption.

[0023] Certainly, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the low-temperature evaporation and condensation device.

[0026] Figure 2 It is a schematic diagram of the structure of the waste liquid tank of the present utility model.

[0027] Figure 3 It is a partial cross-sectional view of the evaporation tank of the present utility model.

[0028] Figure 4 It is a schematic diagram of the structure of the demisting tank of the present utility model.

[0029] Figure 5 It is a schematic diagram of the structure of the steam tank of the present utility model.

[0030] Figure 6 It is a schematic diagram of the structure of the condensation component of the present utility model.

[0031] Figure 7 It is a schematic diagram of the structure of the first serpentine tube of the present utility model.

[0032] Figure 8 For the present utility model Figure 7 Local enlarged view of part A in.

[0033] Figure 9 It is a schematic diagram of the structure of the preheating component of the present utility model.

[0034] Figure 10 It is a schematic diagram of the structure of the preheating tank of the present utility model.

[0035] Figure 11 It is a schematic diagram of the structure of the feed pipe of the present utility model.

[0036] In the drawings, the list of components represented by each reference numeral is as follows:

[0037] 1 - housing, 2 - waste liquid tank, 201 - first diversion block, 202 - drain pipe, 203 - drain valve, 3 - evaporation tank, 301 - liquid outlet pipe, 302 - liquid outlet valve, 303 - second diversion block, 304 - demisting tank, 304a - steam outlet pipe, 304b - collection hood, 4 - steam tank, 401 - first connecting pipe, 402 - steam inlet pipe, 403 - nozzle, 5 - condensation assembly, 501 - condensation tank, 501a - second connecting pipe, 501b - exhaust pipe, 502 - first serpentine pipe, 502a - fin, 502b - through hole, 503 - first water divider, 503a - water inlet pipe, 504 - first water combiner, 504a - third connecting pipe, 6 - preheating assembly, 601 - preheating tank, 601a - fourth connecting pipe, 601b - second water divider, 601c - second water combiner, 601d - fifth connecting pipe, 602 - feed pipe, 602a - sixth connecting pipe, 602b - third water divider, 602c - branch pipe, 602d - third water combiner, 602e - seventh connecting pipe, 603 - second serpentine pipe, 604 - third serpentine pipe. Detailed implementation manner

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown in

[0041] Specifically, the condensation box 501 is fixedly connected to the top of the steam box 4. Inside the condensation box 501, a plurality of first serpentine tubes 502 are fixedly connected at equal intervals from top to bottom. The water inlet ends of the plurality of first serpentine tubes 502 all penetrate through one outer wall of the condensation box 501 and are fixedly connected and communicated with the same first water distributor 503. The top of the first water distributor 503 is fixedly connected and communicated with a water inlet pipe 503a. The water outlet ends of the plurality of first serpentine tubes 502 all penetrate through the other outer wall of the condensation box 501 and are fixedly connected and communicated with the same first water combiner 504. The condensation box 501 is provided to condense the steam in the evaporation box 3. The first serpentine tubes 502 are provided to recycle and reuse the heat of the steam in the condensation box 501. The first water distributor 503 is provided to evenly distribute the water inlet of the steam box 4 into the first serpentine tubes 502. The water inlet pipe 503a is provided to externally connect the first water distributor 503 to a water tank. The first water combiner 504 is provided to combine the water in the first serpentine tubes 502 and transport it into the steam box 4.

[0042] Further, a plurality of liquid outlet pipes 301 penetrate through the front end face of the evaporation box 3 at equal intervals. The bottom ends of the liquid outlet pipes 301 penetrate through the front end face of the waste liquid tank 2 and extend to the upper inner side of the waste liquid tank 2. Liquid outlet valves 302 are arranged on the liquid outlet pipes 301. A second diversion block 303 is fixedly connected to the lower part inside the evaporation box 3. A demisting box 304 is fixedly connected to the other outer wall of the evaporation box 3. A second connecting pipe 501a is fixedly connected and communicated with the lower part of one outer wall of the demisting box 304. The top end of the second connecting pipe 501a penetrates through one outer wall of the condensation box 501 and extends into the condensation box 501. An exhaust pipe 501b penetrates through one side of the top of the condensation box 501;

[0043] First diversion blocks 201 are fixedly connected to the front and rear ends of the lower inner side of the waste liquid tank 2. A plurality of drain pipes 202 penetrate through the center position of the bottom of the waste liquid tank 2 at equal intervals. Drain valves 203 are arranged at the bottom ends of the drain pipes 202;

[0044] A steam outlet pipe 304a penetrates through the upper part of the outer wall of the demisting box 304 close to the evaporation box 3. One end of the steam outlet pipe 304a far from the demisting box 304 penetrates through the outer wall of the evaporation box 3 and is fixedly connected and communicated with a collecting hood 304b. The collecting hood 304b is located above the inside of the evaporation box 3;

[0045] First connecting pipes 401 penetrate through the upper parts of the front and rear end faces of the steam box 4. The bottom ends of the first connecting pipes 401 respectively penetrate through the upper parts of the front and rear end faces of the evaporation box 3 and are fixedly connected and communicated with steam inlet pipes 402. The steam inlet pipes 402 are respectively located at the front and rear ends of the upper inner side of the evaporation box 3. One end of each steam inlet pipe 402 is fixedly connected and communicated with a plurality of nozzles 403 at equal intervals;

[0046] A plurality of fins 502a are sleeved on the outer wall of the first serpentine tube 502 at equal intervals, and a plurality of through holes 502b are uniformly formed on the outer wall of the fins 502a;

[0047] A third connecting pipe 504a is fixedly communicated with the lower part of the outer wall of one side of the first water mixer 504, and the bottom end of the third connecting pipe 504a penetrates through the lower part of the outer wall of one side of the steam box 4 and extends to the lower part inside the steam box 4.

[0048] The operation process of this embodiment is as follows: First, add raw materials into the evaporation box 3, and provide steam to the evaporation box 3 through the steam box 4. The raw materials in the evaporation box 3 are heated by the steam in the steam box 4, so that the raw materials evaporate. The steam generated after the evaporation of the raw materials enters the inside of the condensation box 501 through the demisting box 304. At the same time, the heat in the steam is recovered through the first serpentine tube 502 in the condensation box 501, and the steam is condensed into water. The heated water in the first serpentine tube 502 enters the steam box 4 through the first water mixer 504 and the third connecting pipe 504a for heating, and the waste liquid or concentrated liquid generated after the evaporation of the raw materials enters the waste liquid box 2, realizing the low-temperature evaporation of the raw materials.

[0049] Embodiment 2

[0050] Please refer to Figure 1 、 Figure 9 、 Figure 10 and Figure 11 As shown in, it is the second embodiment of the present utility model. This embodiment is based on the previous embodiment, but different from the previous embodiment is that a preheating assembly 6 is further provided on one side of the housing 1. The preheating assembly 6 includes a preheating box 601, a feed pipe 602, a second serpentine tube 603 and a third serpentine tube 604. The water in the preheating box 601 is heated through the second serpentine tube 603 and the third serpentine tube 604, and the raw materials in the feed pipe 602 are preheated through the preheating box 601, and the raw materials are provided to the evaporation box 3 through the feed pipe 602, solving the problem that the existing raw materials for low-temperature evaporation are not easy to preheat.

[0051] Specifically, the preheating box 601 is fixedly connected to the outer wall of one side of the evaporation box 3. A feed pipe 602 penetrates through the inside of the preheating box 601, and one end of the feed pipe 602 extends into the inside of the evaporation box 3. The front and rear ends of the preheating box 601 are respectively fixedly communicated with a second water distributor 601b and a second water combiner 601c through a fourth connecting pipe 601a. The second water distributor 601b and the second water combiner 601c are fixedly communicated with both ends of a second serpentine pipe 603 and a third serpentine pipe 604 through a fifth connecting pipe 601d. The second serpentine pipe 603 and the third serpentine pipe 604 are respectively fixedly connected to the inner sides below the waste liquid tank 2 and the steam tank 4. The preheating box 601 is provided to preheat the raw materials in the feed pipe 602. The fourth connecting pipe 601a is provided to communicate the preheating box 601 with the second water distributor 601b and the second water combiner 601c, and a circulating water pump is further provided at one end of the fourth connecting pipe 601a located inside the preheating box 601. The second water distributor 601b is provided to evenly distribute the water in the preheating box 601 into the second serpentine pipe 603 and the third serpentine pipe 604. The second water combiner 601c is provided to convey the hot water in the second serpentine pipe 603 and the third serpentine pipe 604 into the preheating box 601. The fifth connecting pipe 601d is provided to communicate between the second water distributor 601b, the second water combiner 601c and the second serpentine pipe 603, the third serpentine pipe 604. The feed pipe 602 is provided to supply raw materials to the inside of the evaporation box 3. The second serpentine pipe 603 and the third serpentine pipe 604 are provided to supply hot water to the preheating box 601.

[0052] Further, the feed pipe 602 includes a sixth connecting pipe 602a penetrating through the outer wall of one side of the preheating box 601. One end of the sixth connecting pipe 602a located inside the preheating box 601 is fixedly communicated with a third water distributor 602b. One end of the third water distributor 602b away from the sixth connecting pipe 602a is fixedly communicated with a plurality of branch pipes 602c. One ends of the plurality of branch pipes 602c away from the third water distributor 602b are all fixedly communicated with the same third water combiner 602d. One end of the third water combiner 602d away from the branch pipes 602c is fixedly communicated with a seventh connecting pipe 602e. One end of the seventh connecting pipe 602e away from the third water combiner 602d sequentially penetrates through the outer walls of the preheating box 601 and the evaporation box 3 and extends into the inside of the evaporation box 3.

[0053] The remaining structures are the same as those in Embodiment 1.

[0054] The operation process of this embodiment is as follows: First, add clear water into the preheating tank 601. The clear water is evenly distributed into the second serpentine tube 603 and the third serpentine tube 604 through the second water distributor 601b. The waste heat of the waste liquid in the waste liquid tank 2 is recovered through the second serpentine tube 603, and a part of the heat in the steam tank 4 is absorbed through the third serpentine tube 604, so that the water in the second serpentine tube 603 and the third serpentine tube 604 is heated. The heated water returns to the preheating tank 601 again through the second water combiner 601c and preheats the raw materials in the feed pipe 602. The preheated raw materials then flow into the evaporation tank 3 for low-temperature evaporation.

[0055] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Low-temperature evaporation and condensation device, comprising a housing (1), wherein a waste liquid tank (2), an evaporation tank (3) and a steam tank (4) are fixedly connected in sequence from bottom to top inside the housing (1), and it is characterized in that: At the uppermost part inside the housing (1), a condensation component (5) is provided, and a preheating component (6) is also provided on one side of the housing (1). The condensation component (5) includes a condensation box (501) fixedly connected to the top of the steam box (4). Inside the condensation box (501), a plurality of first serpentine tubes (502) are fixedly connected at equal intervals from top to bottom. The water inlet ends of the plurality of first serpentine tubes (502) all penetrate through one outer wall of the condensation box (501) and are fixedly communicated with the same first water distributor (503). The top of the first water distributor (503) is fixedly communicated with a water inlet pipe (503a). The water outlet ends of the plurality of first serpentine tubes (502) all penetrate through the other outer wall of the condensation box (501) and are fixedly communicated with the same first water combiner (504). The preheating component (6) includes a preheating box (601), a second serpentine tube (603) and a third serpentine tube (604). The preheating box (601) is fixedly connected to one outer wall of the evaporation box (3). A feed pipe (602) penetrates through the inside of the preheating box (601), and one end of the feed pipe (602) extends into the inside of the evaporation box (3). The front and rear ends of the preheating box (601) are fixedly communicated with a second water distributor (601b) and a second water combiner (601c) respectively through a fourth connecting pipe (601a). The second water distributor (601b) and the second water combiner (601c) are fixedly communicated with the two ends of the second serpentine tube (603) and the third serpentine tube (604) through a fifth connecting pipe (601d). The second serpentine tube (603) and the third serpentine tube (604) are respectively fixedly connected to the inner lower sides of the waste liquid tank (2) and the steam box (4).

2. The low-temperature evaporation and condensation device according to claim 1, characterized in that, On the front end face of the evaporation box (3), a plurality of liquid outlet pipes (301) penetrate through at equal intervals. The bottom ends of the liquid outlet pipes (301) penetrate through the front end face of the waste liquid tank (2) and extend to the inner upper side of the waste liquid tank (2). Liquid outlet valves (302) are arranged on the liquid outlet pipes (301). A second flow guiding block (303) is fixedly connected to the lower part inside the evaporation box (3). An atomizing removal box (304) is fixedly connected to the other outer wall of the evaporation box (3). A second connecting pipe (501a) is fixedly communicated with the lower part of one outer wall of the atomizing removal box (304). The top end of the second connecting pipe (501a) penetrates through one outer wall of the condensation box (501) and extends into the inside of the condensation box (501). An exhaust pipe (501b) penetrates through one side of the top of the condensation box (501).

3. The low-temperature evaporation and condensation device according to claim 2, wherein, At the front and rear ends of the inner lower side of the waste liquid tank (2), first flow guiding blocks (201) are fixedly connected. At the central position of the bottom of the waste liquid tank (2), a plurality of drain pipes (202) penetrate through at equal intervals. Drain valves (203) are arranged at the bottom ends of the drain pipes (202).

4. The low-temperature evaporation and condensation device according to claim 2, characterized in that, Above the outer wall of one side of the demisting box (304) close to the evaporation box (3), a steam outlet pipe (304a) penetrates through, and one end of the steam outlet pipe (304a) far from the demisting box (304) penetrates through the outer wall of the evaporation box (3) and is fixedly communicated with a collection hood (304b). The collection hood (304b) is located above the inside of the evaporation box (3).

5. The low-temperature evaporation and condensation device according to claim 1, wherein Above the front and rear end faces of the steam box (4), first connecting pipes (401) penetrate through. The bottom ends of the first connecting pipes (401) penetrate through the upper parts of the front and rear end faces of the evaporation box (3) respectively and are fixedly communicated with steam inlet pipes (402). The steam inlet pipes (402) are respectively located at the front and rear ends of the upper part inside the evaporation box (3), and one end of each steam inlet pipe (402) is fixedly communicated with a plurality of nozzles (403) at equal intervals.

6. The low-temperature evaporation and condensation device according to claim 1, characterized in that, A plurality of fins (502a) are sleeved on the outer wall of the first serpentine pipe (502) at equal intervals, and a plurality of through holes (502b) are uniformly formed in the outer wall of the fins (502a).

7. The low-temperature evaporation and condensation device according to claim 1, characterized in that, A third connecting pipe (504a) is fixedly communicated with the lower part of the outer wall of one side of the first water combiner (504). The bottom end of the third connecting pipe (504a) penetrates through the lower part of the outer wall of one side of the steam box (4) and extends to the lower part inside the steam box (4).

8. The low-temperature evaporation and condensation device according to claim 1, characterized in that The feed pipe (602) includes a sixth connecting pipe (602a) penetrating through the outer wall of one side of the preheating box (601). One end of the sixth connecting pipe (602a) located inside the preheating box (601) is fixedly communicated with a third water distributor (602b). One end of the third water distributor (602b) far from the sixth connecting pipe (602a) is fixedly communicated with a plurality of branch pipes (602c). One end of each of the plurality of branch pipes (602c) far from the third water distributor (602b) is fixedly communicated with the same third water combiner (602d). One end of the third water combiner (602d) far from the branch pipes (602c) is fixedly communicated with a seventh connecting pipe (602e). One end of the seventh connecting pipe (602e) far from the third water combiner (602d) penetrates through the outer walls of the preheating box (601) and the evaporation box (3) in sequence and extends to the inside of the evaporation box (3).

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