Spiral dry evaporator

Abstract

The utility model provides a spiral dry-type evaporator which comprises a left end socket, a shell and a right end socket which are sequentially connected from left to right, and a tube plate I, a tube plate II and a tube plate III are arranged in the shell from left to right at intervals. The shell is provided with a first inlet, a first outlet, a second outlet and a third outlet. A first spiral pipe set and a second spiral pipe set are further installed in the shell. A left liquid separator and a right liquid separator are respectively mounted in the left sealing head and the right sealing head; and a fourth outlet is further formed in the sealing head. According to the spiral dry type evaporator, the gas-liquid separator, the tube plate II and the tube plate III are arranged to conduct gas-liquid separation on refrigerants entering the first spiral tube set and the second spiral tube set, and the phenomenon that the refrigeration effect is reduced due to the fact that the gas-phase refrigerants enter the spiral dry type evaporator is avoided. The left liquid separator and the right liquid separator are arranged to distribute refrigerants entering the first spiral pipe set and the second spiral pipe set, and therefore the refrigerating effect of the refrigerants on cold water is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a spiral dry evaporator. Background Art

[0002] The evaporator is one of the four major components of a refrigeration system. Low-temperature refrigerant absorbs heat and boils within the evaporator, lowering the temperature of the refrigerant. Dry evaporators are the most commonly used type. Dry evaporators have a wide range of applications, primarily in central air conditioning and cold storage. Their theoretical research and technology are well-established, and their reliability is high. The refrigerant in the dry evaporator continuously vaporizes and absorbs heat as it flows through the tubes, while the refrigerant cools through the shell, releasing heat and cooling.

[0003] Before entering the dry evaporator, the refrigerant is often in a mixed gas-liquid state. Once inside the dry evaporator, gravity forces the liquid refrigerant to flow primarily through the lower heat exchange tubes, while the gaseous refrigerant flows primarily through the upper tubes. This uneven distribution of refrigerant across the tubes reduces the dry evaporator's heat transfer efficiency. Furthermore, as the liquid refrigerant absorbs heat and evaporates, the resulting refrigerant gas occupies space within the tubes, compromising the dry evaporator's heat transfer efficiency. Utility Model Content

[0004] The utility model provides a spiral dry evaporator, which is used to solve the problem of low heat exchange efficiency of the dry evaporator caused by uneven distribution of refrigerant in heat exchange tubes.

[0005] The utility model provides a spiral dry evaporator, comprising a left end cap, a shell, and a right end cap connected sequentially from left to right. Tube sheets I, II, and III are installed in the shell at intervals from left to right. A first inlet and a first outlet are provided on the shell between tube sheets I and II. A demister is installed horizontally in the middle of tube sheets II and III, with a second outlet and a third outlet provided on the upper and lower sides of the demister, respectively. A first spiral tube group is provided below the central axis of the shell, installed between tube sheets I and II. A second spiral tube group is provided above the central axis, installed between tube sheets I and II. A left liquid separator and a right liquid separator are installed in the left and right end caps, respectively. The outlets of the left and right liquid separators are connected to the first and second spiral tube groups, respectively. The inlet of the left liquid separator is connected to the gas-liquid separator, and the inlet of the right liquid separator is connected to the third outlet. A fourth outlet is also provided on the left end cap.

[0006] Optionally, the left liquid separator includes a left range dividing baffle horizontally disposed in the middle of the left end cap, a left liquid separator inlet pipe disposed below the left range dividing baffle, the inlet end of the left liquid separator inlet pipe extending through the side plate of the left end cap and connected to the gas-liquid separator, the outlet end of the left liquid separator inlet pipe connected to two left liquid separator pipes, each of which is connected to two left liquid separator branch pipes. A fan-shaped left first vertical plate is further disposed between the left end cap and the left range dividing baffle, and a plurality of left liquid separator chambers are formed between the left first vertical plate and tube sheet I by two left horizontal plates and a left second vertical plate, with the outlet end of each left liquid separator branch pipe communicating with a left liquid separator chamber in a one-to-one correspondence.

[0007] Optionally, the left liquid dispenser inlet tube is connected to at least two left liquid dispenser tubes, and each left liquid dispenser tube is connected to at least two left liquid dispenser branch tubes.

[0008] Optionally, at least two left horizontal plates and at least one left second vertical plate are arranged between the left first vertical plate and tube plate I.

[0009] Optionally, the right and left liquid distributors are identical in structure except for their mounting locations, including a right splitter plate, a right liquid distributor inlet pipe, a right liquid distributor pipe, a right liquid distributor branch pipe, a right first vertical plate, a right horizontal plate between the right first vertical plate and tube sheet III, a right second vertical plate, and a right liquid distributor chamber. The inlet end of the right liquid distributor inlet pipe is connected to the third outlet.

[0010] Optionally, the first spiral tube group includes multiple first spiral tubes, and the second spiral tube group includes multiple second spiral tubes. The first spiral tubes and the second spiral tubes are exactly the same except for the length. They both include heat exchange tubes and mounting tubes connected at both ends of the heat exchange tubes. Spiral fins are installed on the outside of the heat exchange tubes.

[0011] Optionally, the length ratio of the installation tube to the heat exchange tube is 1:(15-20).

[0012] Optionally, the gas-liquid separator includes a separator body, a material inlet and a liquid discharge port are formed on the side wall of the separator body, a gas outlet is formed on the top, the gas outlet is connected to a conical barrel inside the separator body, a liquid discharge pipe is provided below the conical barrel, the liquid discharge pipe is connected to the liquid discharge port, and the liquid discharge port is connected to the inlet pipe of the left liquid separator.

[0013] Optionally, a plurality of wire mesh demisters are installed in the conical barrel.

[0014] Optionally, a plurality of baffles are alternately arranged between tube sheet I and tube sheet II.

[0015] The spiral dry evaporator provided by the utility model has the following beneficial effects: 1. By providing a gas-liquid separator to separate the refrigerant entering the first spiral tube group, the phenomenon of gas-phase refrigerant entering the first spiral tube group and reducing the refrigeration effect is avoided. By providing tube sheets II and III, the refrigerant exiting the first spiral tube group and about to enter the second spiral tube group is further separated into gas and liquid, effectively improving the operating efficiency of the spiral dry evaporator.

[0016] 2. The left liquid distributor is used to distribute the refrigerant entering the first spiral tube group, and the right liquid distributor is used to redistribute the refrigerant entering the second spiral tube group, so that the refrigerant enters the first spiral tube group and the second spiral tube group as evenly as possible, thereby improving the cooling effect of the refrigerant on the cold water.

[0017] 3. The setting of the left separation chamber in the left liquid distributor reduces the vertical and horizontal spans of the first spiral tube group, so that the refrigerant is distributed more evenly among the various parts of the first spiral tube group. The setting of the right separation chamber in the right liquid distributor reduces the vertical and horizontal spans of the second spiral tube group, so that the refrigerant is distributed more evenly among the various parts of the second spiral tube group.

[0018] 4. By arranging spiral fins on the outside of the heat exchange tube, not only the heat exchange area is increased, but also the spiral form causes the direction of the cold water in the shell to continuously change during the forward movement, causing secondary circulation, thereby enhancing its heat transfer performance.

[0019] 5. By installing a wire mesh demister in the conical barrel of the gas-liquid separator, the water foam contained in the gas can be removed to prevent it from entering the subsequent compressor and affecting the working efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a spiral dry evaporator provided in one embodiment of the present utility model;

[0022] Figure 2 A schematic structural diagram of a spiral dry evaporator provided by an embodiment of the present invention from another perspective;

[0023] Figure 3 A cross-sectional view of a spiral dry evaporator provided in one embodiment of the present utility model;

[0024] Figure 4 A schematic structural diagram of a left liquid dispenser provided in one embodiment of the present utility model;

[0025] Figure 5 A schematic structural diagram of a left liquid dispenser from another perspective provided by an embodiment of the present utility model;

[0026] Figure 6 A schematic structural diagram of a first spiral tube (second spiral tube) provided in one embodiment of the present utility model;

[0027] Figure 7 This is a structural diagram of a gas-liquid separator provided in one embodiment of the present utility model.

[0028] Description of reference numerals:

[0029] 1-Left head, 2-Shell, 3-Right head, 4-Gas-liquid separator, 11-Fourth outlet, 12-Left liquid separator, 21-Tube sheet I, 22-Tube sheet II, 23-Tube sheet III, 24-First inlet, 25-First outlet, 26-Defoamer, 27-Second outlet, 28-Third outlet, 31-Right liquid separator, 41-Separator body, 42-Material inlet, 43-Drainage outlet, 44-Gas outlet, 45-Conical barrel, 46-Drainage Tube, 121-left splitter partition, 122-left liquid distributor inlet pipe, 123-left liquid distributor pipe, 124-left liquid distributor branch pipe, 125-left first vertical plate, 126-left horizontal plate, 127-left second vertical plate, 128-left liquid distributor chamber, 291-first spiral tube group, 292-second spiral tube group, 293-first spiral tube, 294-second spiral tube, 295-heat exchange tube, 296-installation tube, 297-spiral fin, 298-baffle. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts also fall within the scope of protection of the present invention.

[0031] like Figure 1-3As shown, the present invention provides a spiral dry evaporator comprising a left end cap 1, a shell 2, and a right end cap 3, connected sequentially from left to right. Tube sheets I 21, II 22, and III 23 are installed in intervals from left to right within the shell 2. A first inlet 24 and a first outlet 25 are provided on the shell 2 between tube sheets I 21 and II 22. A demister 26 is installed horizontally in the middle of tube sheets II 22 and III 23, with a second outlet 27 and a third outlet 28 formed on the upper and lower sides of the demister 26, respectively. Below the central axis of the shell 2, a first spiral tube group 291 is installed between tube sheets I 21 and II 22. Above the central axis, a second spiral tube group 292 is installed between tube sheets I 21 and II 22. A left liquid separator 12 and a right liquid separator 31 are installed in the left head 1 and the right head 3 respectively. The outlets of the left liquid separator 12 and the right liquid separator 31 are connected to the first spiral tube group 291 and the second spiral tube group 292 respectively. The inlet of the left liquid separator 12 is connected to the gas-liquid separator 4, and the inlet of the right liquid separator 31 is connected to the third outlet 28.

[0032] During operation, the refrigerant first enters the gas-liquid separator 4, where it separates the gas and liquid phases to prevent the gaseous refrigerant from entering the spiral dry evaporator and reducing the cooling effect. After the gas-liquid separation, the liquid refrigerant enters the left end cap 1 and is distributed in the left liquid distributor 12 within the left end cap 1, ensuring that the refrigerant enters the first spiral tube group 291 as evenly as possible.

[0033] While refrigerant is introduced into the first spiral tube group 291, cold water is added to the shell 2 through the first inlet 24. The cold water flows through the shell and eventually exits through the first outlet 25. The first inlet 24 is located near tube sheet II 22, and the first outlet 25 is located near tube sheet I 21. After cooling the cold water, the refrigerant in the first spiral tube group 291 exits the first spiral tube group 291 and enters the space between tube sheets II 22 and III 23. At this point, some of the refrigerant has already vaporized due to heat absorption. This vaporized refrigerant is discharged through the second outlet 27 at the top of the shell 2. During this discharge, the demister 26 removes any liquid foam from the vapor. The remaining liquid refrigerant is discharged through the third outlet 28 at the bottom and enters the right end cap 3. After redistribution by the right liquid distributor 31 within the right end cap 3, it enters the second spiral tube group 292 to further cool the cold water. After completing the refrigeration work, the refrigerant is vaporized and discharged from the spiral dry evaporator through the fourth outlet 21 .

[0034] The spiral dry evaporator provided by the utility model is provided with a gas-liquid separator 4 to separate the refrigerant entering the first spiral tube group 291 from gas and liquid, thereby preventing the phenomenon of gaseous refrigerant entering the first spiral tube group 291 and reducing the refrigeration effect. By providing a gas-liquid separator and providing tube sheets II 22 and III 23, the refrigerant exiting the first spiral tube group 291 and about to enter the second spiral tube group 292 is further separated from the gas and liquid, effectively improving the operating efficiency of the spiral dry evaporator.

[0035] like Figure 4 and Figure 5 As shown, the left liquid separator 12 further includes a left range dividing baffle 121 horizontally arranged in the middle of the left end plate 1. A left liquid separator inlet pipe 122 is arranged below the left range dividing baffle 121. The inlet end of the left liquid separator inlet pipe 122 passes through the side plate of the left end plate 1 and is connected to the gas-liquid separator 4. The outlet end of the left liquid separator inlet pipe 122 is connected to two left liquid separator pipes 123, and each left liquid separator pipe 123 is connected to two left liquid separator branches 124. A fan-shaped left first vertical plate 125 is also installed between the left end plate 1 and the left range dividing baffle 121. Between the left first vertical plate 125 and the tube sheet I 21, two left horizontal plates 126 and a left second vertical plate 127 form a plurality of left liquid separator chambers 128. The outlet end of each left liquid separator branch pipe 124 is connected to a left liquid separator chamber 128 in a one-to-one correspondence. Furthermore, the left liquid distributor inlet pipe 122 is connected to at least two left liquid distributor pipes 123, and each left liquid distributor pipe 123 is connected to at least two left liquid distributor branch pipes 124. Furthermore, at least two left horizontal plates 126 and at least one left second vertical plate 127 are provided between the left first vertical plate 125 and the tube plate I 21.

[0036] The specific working process of the left liquid separator 12 is as follows: liquid refrigerant enters the left liquid separator inlet pipe 122, then passes through the left liquid separator pipe 123 and the left liquid separator branch pipe 124 in sequence. Finally, multiple refrigerant streams flow out of the left liquid separator branch pipe 124, one by one entering the left liquid separator chamber 128. From there, they enter the first spiral tube group 291 to begin cooling. The left splitter baffle 121 in the middle of the left endpiece 1 divides the left endpiece 1 into two independent spaces: the upper half is where the gaseous refrigerant is discharged after completing the cooling process, while the lower half is where the left liquid separator 12 separates the refrigerant. The left first vertical plate 125 separates the tube sheet I 21 from the left endpiece 1 to facilitate subsequent liquid separation. Multiple left liquid separation chambers 128 are formed by two left horizontal plates 126 and one left second vertical plate 127. The setting of the left liquid separation chambers 128 reduces the vertical and horizontal spans of the first spiral tube group 291, so that the refrigerant is distributed more evenly in various parts of the first spiral tube group 291.

[0037] Furthermore, the right liquid distributor 31 is identical to the left liquid distributor 12 except for its mounting location. It includes the right splitter baffle, right liquid distributor inlet pipe, right liquid distributor pipe, right liquid distributor branch pipe, right first vertical plate, right horizontal plate and right second vertical plate between the right first vertical plate and tube sheet III 23, and right liquid distributor chamber. The inlet end of the right liquid distributor inlet pipe communicates with the third outlet 28.

[0038] The working principle of the right liquid separator 31 is exactly the same as that of the left liquid separator 12 and will not be described in detail here. The only difference is that the refrigerant entering the left liquid separator 12 comes from the gas-liquid separator 4, and the refrigerant entering the right liquid separator 31 comes from the first spiral tube group 291.

[0039] like Figure 3 and Figure 6 As shown, first spiral tube group 291 includes multiple first spiral tubes 293, and second spiral tube group 292 includes multiple second spiral tubes 294. First and second spiral tubes 293 and 294 are identical except for their length. They both include heat exchange tubes 295 and mounting tubes 296 connecting the ends of the heat exchange tubes 295. Spiral fins 297 are mounted on the outside of the heat exchange tubes 295. Furthermore, the length ratio of the mounting tubes 296 to the heat exchange tubes 295 is 1:(15-20). Furthermore, multiple baffles 298 are alternately disposed between tube sheet I 21 and tube sheet II 22.

[0040] The first and second spiral tubes 293 and 294 are identical except for their length. A specific description will be given using the first spiral tube 293 as an example: the heat exchange tube 295 in the first spiral tube 293 is the primary heat exchange area. The spiral fins 297 on the outside of the heat exchange tube not only increase the heat exchange area, but also, due to their spiral form, cause the cold water in the shell 2 to continuously change direction as it moves forward, causing secondary circulation and thus enhancing its heat transfer performance. The mounting tubes 296 connecting the two ends of the heat exchange tube 295 are smooth tubes to facilitate the installation of the first spiral tube 293. Furthermore, the mounting tubes 296 should be of a length that is convenient for installation and should not be too long to avoid compromising the heat exchange effect.

[0041] The baffle 298 is used to increase the residence time of the cold water in the shell 2 to improve the cooling efficiency.

[0042] like Figure 7 As shown, the gas-liquid separator 4 further includes a separator body 41. A material inlet 42 and a liquid discharge port 43 are provided on the sidewall of the separator body 41. A gas outlet 44 is provided at the top. The gas outlet 44 is connected to a conical barrel 45 inside the separator body 41. A liquid discharge pipe 46 is provided below the conical barrel 45, and the liquid discharge pipe 46 is connected to the liquid discharge port 43. The liquid discharge port 43 is connected to the left liquid separator inlet pipe 122. Furthermore, multiple wire mesh demisters are installed in the conical barrel 45.

[0043] The air inlet end of the conical barrel 45 in the gas-liquid separator 4 must be positioned below the material inlet 42. Under the action of a pump or compressor, the gas-liquid two-phase mixed refrigerant enters the gas-liquid separator 4 from the material inlet 42. After hitting the conical barrel 45, the gas-phase refrigerant is turned back and pressed into the conical barrel 45 and discharged from the gas outlet 44. The liquid-phase refrigerant falls under the action of gravity and is discharged through the drain pipe 46 and the drain port 43 to achieve gas-liquid separation. The multiple wire mesh demisters installed in the conical barrel 45 can remove water foam entrained in the gas to prevent it from entering the subsequent compressor and affecting the working efficiency of the compressor.

[0044] The complete working principle of the spiral dry evaporator provided by the utility model is as follows:

[0045] like Figure 1-7 As shown, the gas-liquid two-phase mixed refrigerant enters the gas-liquid separator 4 from the material inlet 42 under the action of a pump or compressor. After hitting the conical barrel 45, the gas-phase refrigerant is turned back and pressed into the conical barrel 45 and discharged from the gas outlet 44. The liquid-phase refrigerant falls under the action of gravity and is discharged through the drain pipe 46 and the drain port 43, achieving gas-liquid separation.

[0046] After the refrigerant undergoes gas-liquid separation, the liquid phase enters the left separator inlet pipe 122, then flows through the left separator pipe 123 and the left separator branch pipe 124. Finally, multiple refrigerant streams flow out of the left separator branch pipe 124, one by one entering the left separator chamber 128. From there, they enter the first spiral tube group 291 to begin cooling. While the refrigerant is being introduced into the first spiral tube group 291, cold water is added to the shell 2 through the first inlet 24. The cold water, deflected by the baffle 298, continuously flows through the shell side, ultimately flowing out through the first outlet 25. The first inlet 24 is located near tube sheet II 22, and the first outlet 25 is located near tube sheet I 21. After cooling the cold water, the refrigerant in the first spiral tube group 291 exits the first spiral tube group 291 and enters the space between tube sheets II 22 and III 23. At this point, some of the refrigerant has already vaporized due to heat absorption. This vaporized refrigerant is discharged through the second outlet 27 above the shell 2. During the discharge process, the demister 26 removes liquid foam from the gas. The remaining liquid refrigerant is discharged through the third outlet 28 below and enters the right end cap 3. After being redistributed by the right liquid distributor 31 in the right end cap 3, it enters the second spiral tube group 292 to cool the cold water again. After completing the refrigeration process, the refrigerant is vaporized and discharged from the spiral dry evaporator through the fourth outlet 21.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral dry evaporator, characterized in that: The invention comprises a left end cap (1), a shell (2) and a right end cap (3) connected in sequence from left to right, wherein a tube sheet I (21), a tube sheet II (22) and a tube sheet III (23) are installed in the shell (2) at intervals from left to right; a first inlet (24) and a first outlet (25) are provided on the shell (2) between the tube sheet I (21) and the tube sheet II (22); a demister (26) is horizontally installed in the middle of the tube sheet II (22) and the tube sheet III (23); a second outlet (27) and a third outlet (28) are respectively provided on the upper and lower sides of the demister (26); a first spiral tube group (291) installed between the tube sheet I (21) and the tube sheet II (22) is provided below the central axis of the shell (2); and a second spiral tube group (292) installed between the tube sheet I (21) and the tube sheet II (22) is provided above the central axis; A left liquid separator (12) and a right liquid separator (31) are installed in the left head (1) and the right head (3), respectively. The outlets of the left liquid separator (12) and the right liquid separator (31) are connected to the first spiral tube group (291) and the second spiral tube group (292), respectively. The inlet of the left liquid separator (12) is connected to the gas-liquid separator (4), and the inlet of the right liquid separator (31) is connected to the third outlet (28). A fourth outlet (11) is also provided on the left head (1).

2. The spiral dry evaporator according to claim 1, characterized in that: The left liquid separator (12) comprises a left dividing partition (121) horizontally arranged in the middle of the left end cap (1); a left liquid separator inlet pipe (122) is arranged below the left dividing partition (121); the inlet end of the left liquid separator inlet pipe (122) passes through the side plate of the left end cap (1) and is connected to the gas-liquid separator (4); the outlet end of the left liquid separator inlet pipe (122) is connected to two left liquid separator pipes (123); each of the left liquid separator pipes (123) is connected to two left liquid separator branch pipes (124); A fan-shaped left first vertical plate (125) is also installed between the left head (1) and the left dividing partition (121). Two left horizontal plates (126) and a left second vertical plate (127) form a plurality of left liquid separation chambers (128) between the left first vertical plate (125) and the tube sheet I (21). The outlet end of each left liquid separation branch pipe (124) is connected to the left liquid separation chamber (128) in a one-to-one correspondence.

3. The spiral dry evaporator according to claim 2, characterized in that: The left liquid distributor inlet pipe (122) is connected to at least two left liquid distributor pipes (123), and each left liquid distributor pipe (123) is connected to at least two left liquid distributor branch pipes (124).

4. The spiral dry evaporator according to claim 2, characterized in that: At least two left horizontal plates (126) and at least one left second vertical plate (127) are provided between the left first vertical plate (125) and the tube plate I (21).

5. The spiral dry evaporator according to claim 2, characterized in that: The right liquid distributor (31) and the left liquid distributor (12) are identical in structure except for the installation position, and include a right splitting partition, a right liquid distributor inlet pipe, a right liquid distributor pipe, a right liquid distributor branch pipe, a right first vertical plate, a right horizontal plate between the right first vertical plate and the tube plate III, a right second vertical plate, and a right liquid distributor chamber; The inlet end of the right liquid dispenser inlet pipe is communicated with the third outlet (28).

6. The spiral dry evaporator according to claim 1, characterized in that: The first spiral tube group (291) includes a plurality of first spiral tubes (293), and the second spiral tube group (292) includes a plurality of second spiral tubes (294). The first spiral tubes (293) and the second spiral tubes (294) are identical except for their lengths. Both of them include a heat exchange tube (295) and mounting tubes (296) connected at both ends of the heat exchange tube (295). Spiral fins (297) are mounted on the outer side of the heat exchange tube (295).

7. The spiral dry evaporator according to claim 6, characterized in that: The length ratio of the installation tube (296) to the heat exchange tube (295) is 1:(15-20).

8. The spiral dry evaporator according to claim 2, characterized in that: The gas-liquid separator (4) comprises a separator body (41), a material inlet (42) and a liquid discharge port (43) are provided on the side wall of the separator body (41), a gas outlet (44) is provided on the top, the gas outlet (44) is communicated with a conical barrel (45) inside the separator body (41), a liquid discharge pipe (46) is provided below the conical barrel (45), and the liquid discharge pipe (46) is communicated with the liquid discharge port (43); The liquid discharge port (43) is in communication with the left liquid distributor inlet pipe (122).

9. The spiral dry evaporator according to claim 8, characterized in that: A plurality of wire mesh demisters are installed in the conical barrel (45).

10. The spiral dry evaporator according to any one of claims 1 to 9, characterized in that: A plurality of baffles (298) are alternately arranged between the tube sheet I (21) and the tube sheet II (22).

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