CN218774316U - Four-effect evaporation separation device - Google Patents

Abstract

The utility model relates to a four-effect evaporation separation device, which comprises a shell, a heat exchange tube, a first-effect separation chamber, a second-effect separation chamber, a third-effect separation chamber and a four-effect separation chamber, wherein the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber and the four-effect separation chamber are sequentially arranged in the shell; two adjacent separation chambers are communicated, and a liquid injection pipeline, a hot gas inlet pipeline and a circulating liquid inlet pipeline are arranged on the first-effect separation chamber; the four-effect separation chamber is provided with a steam pipeline, a hot gas outlet pipeline and a circulating liquid outlet pipeline. The waste liquid of the utility model can reach the four-effect separation chamber through the liquid injection pipeline sequentially via the first-effect separation chamber, the second-effect separation chamber and the third-effect separation chamber, and the waste water in the four-effect separation chamber can enter the first-effect separation chamber sequentially via the circulating liquid outlet pipeline and the circulating liquid inlet pipeline, so that the circulation of the waste water can be realized; through set up the heat exchange tube in the casing, steam accessible steam inlet line is in proper order through heat exchange tube to steam pipeline of giving vent to anger, and this application only needs to set up the circulation evaporation that single circulating pump and heat exchanger can realize waste water, can reduce the steam heat and run off to guarantee the evaporation effect of waste water.

Description

Four-effect evaporation separation device

Technical Field

The utility model relates to a multi-effect evaporator technical field especially relates to a four-effect evaporation and separation device.

Background

The multi-effect evaporator is mainly applied to the treatment of high-concentration organic wastewater such as wine tank filtrate, fermentation raw stock waste liquid and the like in the fermentation industry, the sugar industry, the fruit juice and beverage industry, the pharmaceutical industry and the like, and inorganic wastewater in the chemical production industry and the like.

The multi-effect evaporator is designed by using the principle that the boiling temperature of water is different at different pressures. In the multi-effect evaporator, heating steam enters a first effect of the evaporator, secondary steam generated by the first effect enters a second effect as the heating steam of the second effect, the secondary steam generated by the second effect enters a third effect as the heating steam … of the third effect, and the like, so that the effect of saving energy consumption is achieved by utilizing the steam for multiple times.

And the four effect evaporator among the prior art includes four heat exchangers, four circulating pumps usually, and the structure is comparatively complicated, and because the mechanism is too much, leads to increasing the pipeline easily to lead to steam heat to run off, thereby influence the evaporation effect.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a four-effect evaporation separation device which can realize the circulation evaporation of the waste water only by arranging a single circulating pump and a heat exchanger, has a simple structure, can reduce the loss of steam heat and ensure the evaporation effect of the waste water.

A four-effect evaporation separation device comprises a shell, a first-effect separation chamber, a second-effect separation chamber, a third-effect separation chamber and a four-effect separation chamber, wherein the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber and the four-effect separation chamber are sequentially arranged in the shell;

partition plates are arranged between the first-effect separation chamber and the second-effect separation chamber, between the second-effect separation chamber and the third-effect separation chamber, and between the third-effect separation chamber and the fourth-effect separation chamber, and a through liquid inlet is formed in each partition plate;

the side wall of the primary effect separation chamber is provided with a liquid injection pipeline, a hot gas inlet pipeline and a circulating liquid inlet pipeline; the liquid injection pipeline and the circulating liquid inlet pipeline are communicated with the inside of the primary effect separation chamber and the outside of the shell;

a steam pipeline, a hot gas outlet pipeline and a circulating liquid outlet pipeline are arranged on the side wall of the four-effect separation chamber; the steam pipeline and the circulating liquid outlet pipeline are communicated with the inside of the four-effect separation chamber and the outside of the shell;

the heat exchange tube, the heat exchange tube set up in the casing, the heat exchange tube has relative first end and the second end that sets up, the first end of heat exchange tube with steam inlet pipe says and is linked together, the second end of heat exchange tube with steam outlet pipe says and is linked together.

In one embodiment, the four-effect evaporation separation device further comprises a demisting mechanism, and the demisting mechanism is detachably connected in the steam pipeline.

In one embodiment, defoaming agent feeding mechanisms are arranged in the first-effect separation chamber, the second-effect separation chamber and the third-effect separation chamber and used for adding defoaming agents into wastewater in the first-effect separation chamber, the second-effect separation chamber and the third-effect separation chamber.

In one embodiment, the heat exchange tube extends curvilinearly in a length direction thereof.

In one embodiment, the heat exchange tube is helical or S-shaped.

In one embodiment, the heat exchange tube comprises a first spiral tube formed in the first effect separation chamber, a second spiral tube formed in the second effect separation chamber, a third spiral tube formed in the third effect separation chamber, and a fourth spiral tube formed in the fourth effect separation chamber, and the first spiral tube, the second spiral tube, the third spiral tube, and the fourth spiral tube are sequentially communicated.

In one embodiment, the four-effect evaporative separation device further comprises a first vent line, a second vent line, and a third vent line; each partition plate is provided with a through air vent; the third partition board is respectively a first partition board, a second partition board and a third partition board, and the first ventilation pipeline is communicated with the ventilation port on the first partition board and the second spiral pipe; the second ventilation pipeline is communicated with the ventilation port on the second partition plate and the third spiral pipe; and the third ventilation pipeline is communicated with the ventilation port on the third partition plate and the fourth spiral pipe.

In one embodiment, the first, second, third and fourth volutes are all helical or S-shaped.

In one embodiment, the air ports on the first partition plate, the second partition plate and the third partition plate are spaced from each other in a first direction, the air ports on the first partition plate and the third partition plate are spaced from the air ports on the second partition plate in a second direction, and the first direction is perpendicular to the second direction.

In one embodiment, the first partition, the second partition and the third partition divide the cavity in the housing along the first direction to form the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber and the fourth-effect separation chamber in sequence.

In the scheme, the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber and the fourth-effect separation chamber are sequentially arranged in the shell, two adjacent separation chambers are communicated through the liquid inlet, waste liquid can enter the first-effect separation chamber through the liquid injection pipeline and sequentially enter the second-effect separation chamber and the third-effect separation chamber to the fourth-effect separation chamber, and waste water in the fourth-effect separation chamber can sequentially enter the first-effect separation chamber through the circulating liquid outlet pipeline and the circulating liquid inlet pipeline, so that the circulation of the waste water can be realized; the heat exchange tube is arranged in the shell, one end of the heat exchange tube is communicated with the hot gas inlet pipeline, the other end of the heat exchange tube is communicated with the hot gas outlet pipeline, hot gas can pass through the hot gas inlet pipeline to the interior of the heat exchange tube, and the hot gas can sequentially pass through the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber and the fourth-effect separation chamber to the hot gas outlet pipeline so as to exchange heat with wastewater in the four separation chambers, so that the wastewater in the four separation chambers is heated and evaporated; through being provided with steam conduit on the lateral wall at the quadruple effect separator, steam accessible steam conduit in the quadruple effect separator arranges to the casing outside, and this application simple structure only needs to set up the circulation evaporation that single circulating pump and heat exchanger can realize waste water, can reduce the steam heat and run off to guarantee the evaporation effect of waste water.

Drawings

Fig. 1 is a schematic connection diagram of a four-effect evaporation separation apparatus according to an embodiment of the present invention.

Description of the reference numerals

10. A four-effect evaporation separation device; 100. a housing; 110. a first side wall; 120. a second side wall; 130. a third side wall; 140. a fourth side wall; 200. a heat exchange pipe; 210. a first spiral pipe; 220. a second spiral pipe; 230. a third spiral pipe; 240. a fourth spiral pipe; 300. a four-effect separation mechanism; 310. a primary separation chamber; 311. a liquid injection pipeline; 312. a hot gas inlet duct; 313. a circulating liquid inlet pipeline; 320. a two-effect separation chamber; 330. a triple effect separation chamber; 340. a four-effect separation chamber; 341. a steam pipe; 342. a hot gas outlet pipeline; 343. a circulating liquid outlet pipeline; 350. a partition plate; 351. a liquid through port; 352. a vent; 400. a demisting mechanism; 500. a defoaming agent feeding mechanism; 600. a first vent line; 700. a second vent line; 800. a third vent line.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "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 convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may 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 intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1, an embodiment of the present invention provides a four-effect evaporation separation apparatus 10, which includes a casing 100, a heat exchange tube 200 and a four-effect separation mechanism 300, wherein the four-effect separation mechanism 300 includes a first-effect separation chamber 310, a second-effect separation chamber 320, a third-effect separation chamber 330 and a four-effect separation chamber 340, which are sequentially disposed in the casing 100. The first-effect separation chamber 310 and the second-effect separation chamber 320, the second-effect separation chamber 320 and the third-effect separation chamber 330, and the third-effect separation chamber 330 and the fourth-effect separation chamber 340 are communicated with each other. The heat exchange pipe 200 is disposed inside the case 100.

Referring to fig. 1, partitions 350 are disposed between the first-effect separation chamber 310 and the second-effect separation chamber 320, between the second-effect separation chamber 320 and the third-effect separation chamber 330, and between the third-effect separation chamber 330 and the fourth-effect separation chamber 340. The three partitions 350 divide the cavity in the casing 100 along the first direction to form a first-effect separation chamber 310, a second-effect separation chamber 320, a third-effect separation chamber 330 and a fourth-effect separation chamber 340. Specifically, the three partition plates 350 are uniformly disposed in the housing 100 at intervals along the first direction. The first direction is the X direction.

More specifically, the housing 100 includes a first sidewall 110, a second sidewall 120, a third sidewall 130, and a fourth sidewall 140, wherein the first sidewall 110 is disposed opposite to the third sidewall 130, the second sidewall 120 is disposed opposite to the fourth sidewall 140, the first sidewall 110 is disposed perpendicular to the second sidewall 120, and the third sidewall 130 is disposed perpendicular to the fourth sidewall 140. The three partition plates 350 have two opposite ends, and the two ends of the three partition plates 350 are respectively connected to the second side wall 120 and the fourth side wall 140 of the casing 100. The extending direction of the partition 350 is perpendicular to the first direction. I.e., the partition 350 is vertically disposed within the case 100.

Referring to fig. 1, each partition 350 is provided with a through liquid port 351, such that the first-effect separation chamber 310 and the second-effect separation chamber 320, the second-effect separation chamber 320 and the third-effect separation chamber 330, and the third-effect separation chamber 330 and the fourth-effect separation chamber 340 are communicated with each other through the liquid port 351 and the vent 352.

The side wall of the first-effect separation chamber 310 is provided with a liquid injection pipeline 311, a hot gas inlet pipeline 312 and a circulating liquid inlet pipeline 313. The liquid injection pipeline 311 and the circulating liquid inlet pipeline 313 are communicated with the inside of the single-effect separation chamber 310 and the outside of the shell 100. Specifically, the liquid injection pipe 311, the hot gas inlet pipe 312 and the circulation liquid inlet pipe 313 are all opened on the first side wall 110 of the casing 100. Waste liquid is injected into the first-effect separation chamber 310 through the liquid injection pipeline 311, and the waste water entering the first-effect separation chamber 310 can enter the second-effect separation chamber 320 through a liquid through port 351 between the first-effect separation chamber 310 and the second-effect separation chamber 320; the wastewater entering the secondary-effect separation chamber 320 can enter the tertiary-effect separation chamber 330 through a liquid inlet 351 between the secondary-effect separation chamber 320 and the tertiary-effect separation chamber 330; the wastewater entering the three-effect separation chamber 330 can enter the four-effect separation chamber 340 through the liquid inlet 351 between the three-effect separation chamber 330 and the four-effect separation chamber 340.

Referring to fig. 1, a steam pipe 341, a hot gas outlet pipe 342 and a circulating liquid outlet pipe 343 are disposed on the sidewall of the four-effect separation chamber 340; the steam pipeline 341 and the circulation liquid outlet pipeline 343 are communicated with the inside of the four-effect separation chamber 340 and the outside of the shell 100. Specifically, the steam pipe 341 opens in the second sidewall 120 of the casing 100. The hot gas outlet pipe 342 is opened at the third sidewall 130 of the casing 100. The circulation outlet pipe 343 is opened in the fourth side wall 140 of the housing 100.

The waste liquid entering the four-effect separation chamber 340 can enter the one-effect separation chamber 310 through the circulating liquid outlet pipeline 343 and the circulating liquid inlet pipeline 313 in sequence, so that the circulation of the waste water can be completed. It is to be understood that: a circulation pump may be provided outside, and the waste liquid in the four-effect separation chamber 340 may be pumped into the one-effect separation chamber 310 by the circulation pump.

Referring to fig. 1, the heat exchange tube 200 has a first end and a second end opposite to each other, the first end of the heat exchange tube 200 is communicated with the hot gas inlet pipe 312, and the second end of the heat exchange tube 200 is communicated with the hot gas outlet pipe 342. That is, the first-effect separation chamber 310, the second-effect separation chamber 320, the third-effect separation chamber 330 and the fourth-effect separation chamber 340 all have a part of the heat exchange tubes 200 therein.

Hot gas can pass through the hot gas inlet pipeline 312 to the inside of the heat exchange tube 200, and the hot gas can sequentially pass through the first-effect separation chamber 310, the second-effect separation chamber 320, the third-effect separation chamber 330 and the fourth-effect separation chamber 340 to the hot gas outlet pipeline 342 to exchange heat with the wastewater in the first-effect separation chamber 310, the second-effect separation chamber 320, the third-effect separation chamber 330 and the fourth-effect separation chamber 340, so that the wastewater in the first-effect separation chamber 310, the second-effect separation chamber 320, the third-effect separation chamber 330 and the fourth-effect separation chamber 340 can be heated and evaporated. The steam in the four-effect separation chamber 340 may be discharged to the outside of the casing 100 through the steam pipe 341. It is to be understood that: a heat exchanger may be provided at the outside to supply hot gas to the inside of the heat exchange pipe 200 through a hot gas inlet duct 312.

Referring to fig. 1, according to some embodiments of the present application, optionally, the four-effect evaporation separation device 10 further includes a defogging mechanism 400 disposed in the steam conduit 341 for intercepting fine droplets, and the steam in the four-effect separation chamber 340 can be discharged out of the casing 100 through the steam conduit 341.

Specifically, the defogging mechanism 400 includes a defogging mesh disposed within a vapor conduit 341, and the vapor conduit 341 is coupled to the second sidewall 120 of the housing 100. The defogging silk screen is used for intercepting tiny fog drops, and the water drops on the defogging silk screen are accumulated to a little or a great extent and finally fall into the four-effect separation chamber 340 again.

More specifically, the steam pipe 341 is detachably coupled to the second sidewall 120 of the casing 100, and the defogging net is detachably coupled to the inside of the steam pipe 341. By detachably connecting the steam pipe 341 to the second sidewall 120 of the casing 100, the defogging mesh can be detachably connected to the steam pipe 341, which facilitates the quick assembly, disassembly and maintenance of the steam pipe 341 and the defogging mesh.

Referring to fig. 1, according to some embodiments of the present disclosure, an antifoaming agent feeding mechanism 500 is optionally disposed in each of the first-effect separation chamber 310, the second-effect separation chamber 320, and the third-effect separation chamber 330, and is configured to add an antifoaming agent to wastewater in each of the first-effect separation chamber 310, the second-effect separation chamber 320, and the third-effect separation chamber 330. Specifically, the three-effect defoaming agent feeding mechanism 500 is respectively disposed on the top of the first-effect separation chamber 310, the second-effect separation chamber 320, and the third-effect separation chamber 330. It should be noted that: the top of the first-effect separation chamber 310, the second-effect separation chamber 320 and the third-effect separation chamber 330 is the second side wall 120 of the casing 100.

More specifically, the defoaming agent feeding mechanism 500 includes a defoaming pipeline and a rotary nozzle disposed at one end of the defoaming pipeline and communicated with the inside of the defoaming pipeline. The other end of the defoaming duct is disposed on the second sidewall 120 of the casing 100, and the inside of the defoaming duct is communicated with the outside of the casing 100.

The defoaming agent can enter the separation chamber through the defoaming pipeline and the rotary nozzle in sequence so as to eliminate bubbles generated in the separation chamber. Through setting up rotary nozzle, rotary nozzle can spout the defoaming agent and scatter the waste water liquid level, has added the effort that the foam was beaten to the liquid pearl on the basis of defoaming agent self defoaming, has further strengthened defoaming effect.

Referring to fig. 1, according to some embodiments of the present application, optionally, a heat exchange tube 200 extends curvilinearly in its length direction. In one embodiment, the heat exchange tube 200 is helical. In another embodiment, the heat exchange tube 200 is S-shaped. By arranging the heat exchange pipe 200 in a spiral or S-shape, the amount of heat exchange with the waste water can be increased, and the evaporation waste water can be further heated.

Referring to fig. 1, according to some embodiments of the present application, the heat exchange pipe 200 optionally includes a first spiral pipe 210 formed in a first-effect separation chamber 310, a second spiral pipe 220 formed in a second-effect separation chamber 320, a third spiral pipe 230 formed in a third-effect separation chamber 330, and a fourth spiral pipe 240 formed in a fourth-effect separation chamber 340. The first solenoid 210, the second solenoid 220, the third solenoid 230, and the fourth solenoid 240 are in communication in sequence.

Specifically, in one embodiment, the first volute 210, the second volute 220, the third volute 230, and the fourth volute 240 are each helical. In another embodiment, the first volute 210, the second volute 220, the third volute 230 and the fourth volute 240 are S-shaped.

Referring to fig. 1, according to some embodiments of the present application, the four-effect evaporative separation apparatus 10 further includes a first vent line 600, a second vent line 700, and a third vent line 800. Each partition 350 is provided with a vent 352 therethrough. The three partitions 350 are a first partition 350, a second partition 350, and a third partition 350, respectively. The first ventilation line 600 is connected to the ventilation hole 352 of the first partition 350 and the second spiral pipe 220. The second vent line 700 communicates with the vent 352 of the second partition 350 and the third coil 230. The third vent line 800 communicates with the vent 352 of the third partition 350 and the fourth coil 240.

Steam is generated when the waste water in the one-effect separation chamber 310, the two-effect separation chamber 320, the three-effect separation chamber 330 and the four-effect separation chamber 340 is heated and evaporated. The steam in the primary separation chamber 310 can enter the second spiral pipe 220 in the secondary separation chamber 320 through the vent 352 on the first partition 350 and the first vent pipe 600. The steam in the second-effect separation chamber 320 can enter the second spiral pipe 220 in the third-effect separation chamber 330 through the vent 352 on the second partition 350 and the second vent pipe 700. Steam in the three-effect separation chamber 330 can enter the fourth spiral pipe 240 in the four-effect separation chamber 340 through the vent 352 in the third partition 350 and the third vent line 800. The steam generated by each effect can be used as the heating steam of the next effect, the use of an external heat exchange source can be reduced, and the effect of energy conservation can be achieved.

Referring to fig. 1, according to some embodiments of the present application, optionally, the vent holes 352 on the first partition 350, the vent holes 352 on the second partition 350, and the vent holes 352 on the third partition 350 are spaced apart in the first direction. In the second direction, the air ports 352 and 352 of the first and third partitions 350 and 350 are spaced apart from the air ports 352 and 352 of the second partition 350. The first direction is perpendicular to the second direction. The second direction is the Y direction.

It is to be understood that: by arranging the air vents 352 and 352 in the first, second, and third partition plates 350 and 352 in a staggered manner in the first direction, the path through which the wastewater in the first-effect separation chamber 310 flows from the first-effect separation chamber 310 to the fourth-effect separation chamber 340 can be increased, and the evaporated wastewater can be further heated.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A four-effect evaporation separation device is characterized by comprising a shell, and a first-effect separation chamber, a second-effect separation chamber, a third-effect separation chamber and a four-effect separation chamber which are sequentially arranged in the shell;

partition plates are arranged between the first-effect separation chamber and the second-effect separation chamber, between the second-effect separation chamber and the third-effect separation chamber, and between the third-effect separation chamber and the fourth-effect separation chamber, and a through liquid inlet is formed in each partition plate;

a liquid injection pipeline, a hot gas inlet pipeline and a circulating liquid inlet pipeline are arranged on the side wall of the primary separating chamber; the liquid injection pipeline and the circulating liquid inlet pipeline are communicated with the inside of the primary effect separation chamber and the outside of the shell;

a steam pipeline, a hot gas outlet pipeline and a circulating liquid outlet pipeline are arranged on the side wall of the four-effect separation chamber; the steam pipeline and the circulating liquid outlet pipeline are communicated with the inside of the four-effect separation chamber and the outside of the shell;

the heat exchange tube, the heat exchange tube set up in the casing, the heat exchange tube has relative first end and the second end that sets up, the first end of heat exchange tube with steam inlet pipe says and is linked together, the second end of heat exchange tube with steam outlet pipe says and is linked together.

2. The four-effect evaporative separation device of claim 1, further comprising a demisting mechanism removably connected within the vapor conduit.

3. The four-effect evaporation separation device according to claim 1, wherein defoaming agent feeding mechanisms are arranged in the first-effect separation chamber, the second-effect separation chamber and the third-effect separation chamber, and are used for adding defoaming agents into wastewater in the first-effect separation chamber, the second-effect separation chamber and the third-effect separation chamber.

4. The four-effect evaporative separation apparatus of claim 1, wherein the heat exchange tubes extend curvilinearly in their length.

5. The four-effect evaporative separation apparatus of claim 1, wherein the heat exchange tubes are helical or S-shaped.

6. The four-effect evaporation separation device according to claim 1, wherein the heat exchange tube comprises a first spiral tube formed in the first-effect separation chamber, a second spiral tube formed in the second-effect separation chamber, a third spiral tube formed in the third-effect separation chamber, and a fourth spiral tube formed in the fourth-effect separation chamber, and the first spiral tube, the second spiral tube, the third spiral tube, and the fourth spiral tube are sequentially communicated.

7. The four-effect evaporative separation device of claim 6, further comprising a first vent line, a second vent line, and a third vent line; each partition plate is provided with a through air vent; the third partition board is respectively a first partition board, a second partition board and a third partition board, and the first ventilation pipeline is communicated with the ventilation port on the first partition board and the second spiral pipe; the second ventilating pipeline is communicated with a ventilating opening in the second partition plate and a third spiral pipe; and the third ventilation pipeline is communicated with the ventilation port on the third partition plate and the fourth spiral pipe.

8. The four-effect evaporative separation apparatus according to claim 6 or 7, wherein the first, second, third and fourth coils are each helical or S-shaped.

9. The four-effect evaporative separation device of claim 7, wherein the vents on the first partition, the vents on the second partition, and the vents on the third partition are spaced apart in a first direction, and wherein the vents on the first partition and the vents on the third partition are spaced apart from the vents on the second partition in a second direction, the first direction being perpendicular to the second direction.

10. The four-effect evaporation separation device according to claim 9, wherein the first partition, the second partition, and the third partition sequentially divide the cavity in the housing along the first direction to form the first-effect separation chamber, the second-effect separation chamber, the third-effect separation chamber, and the four-effect separation chamber.

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