Methanol steam cooling device

Abstract

The utility model belongs to the technical field of steam cooling, and relates to a methanol steam cooling device which comprises an atmospheric tower body, an atmospheric tower return tank, an atmospheric tower air cooler, a fan, a first water cooler and a second water cooler, methanol steam flowing out of the top of the atmospheric tower body is sequentially cooled by the atmospheric tower air cooler and the atmospheric tower return tank and then enters the atmospheric tower body from the side part of the atmospheric tower body; the fan is arranged above the atmospheric tower air cooler, and a motor is connected and mounted on the fan; one end of the first water cooler and one end of the second water cooler are both communicated with the atmospheric tower air cooler; and the other end of the first water cooler and the other end of the second water cooler are both communicated with the atmospheric tower return tank. According to the utility model, the two water coolers which are connected in parallel are additionally arranged behind the air cooler, cooling water between the two water coolers is circulated, and meanwhile, the fan is arranged outside the air cooler; the consumption of cooling water is saved, the fan can be conveniently overhauled in time, and efficient cooling of methanol steam is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam cooling, and relates to a methanol steam cooling device. Background Art

[0002] In the methanol distillation process, methanol vapor is generated at the top of the methanol recovery column. Since this part of the methanol vapor contains methanol, in order to avoid waste of methanol resources and improve the distillation efficiency and quality of methanol, the gas phase at the top of the distillation column is condensed and cooled, and then recovered through a reflux drum and then refluxed to the methanol distillation system to achieve continuous reflux of methanol vapor.

[0003] At present, the cooling of methanol vapor mostly adopts the air-cooling mode of an air cooler. This operation mainly uses electric energy to drive a fan, and the fan dissipates heat from the fins of the air cooler, and the heat carried by the fins is dissipated into the atmosphere to achieve the condensation and cooling of methanol vapor. However, in a high-temperature environment in summer, due to the high air temperature, there is a technical problem of poor cooling effect when using an air cooler. Referring to the Chinese patent document with the application number CN201920473859.2, a methanol vapor condensation system is disclosed. By setting a water cooler in parallel with the air cooler, a flow control valve at the inlet of the water cooler, and a water spray system on the air cooler, the medium gas volume is coordinated and distributed between the water cooler and the air cooler to achieve methanol vapor condensation.

[0004] However, the following problems exist in the existing methanol vapor cooling: only one water cooler is used for indirect cooling at present. However, water cooling relies on heat exchange with cooling water to achieve cooling. Therefore, if we want to cope with the cooling of methanol vapor in a high-temperature environment, a large amount of cooling water needs to be consumed, thus increasing the cost; in the prior art, the axial flow fan is built inside the air cooler. During long-term use, when the fan fails, the maintenance is extremely inconvenient. If the air cooler stops running for a long time, it will affect the cooling effect. Summary of the Utility Model

[0005] Aiming at the technical problems existing in the above-mentioned background art, namely, the consumption of a large amount of cooling water, the increase in cost, and the extremely inconvenient maintenance of the fan in methanol vapor cooling, the utility model provides a high-efficiency methanol vapor cooling device.

[0006] In the utility model, two water coolers in parallel are added behind the air cooler, and the cooling water between the two water coolers circulates. At the same time, the fan is arranged outside the air cooler; not only the consumption of cooling water is saved, but also the fan can be conveniently maintained in time, realizing the high-efficiency cooling of methanol vapor.

[0007] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0008] A methanol vapor cooling device, comprising an atmospheric column body, an atmospheric column reflux drum, an atmospheric column air cooler, a fan, a first water cooler and a second water cooler; the methanol vapor flowing out from the top of the atmospheric column body is cooled by the atmospheric column air cooler and the atmospheric column reflux drum in sequence, and then enters the atmospheric column body from the side of the atmospheric column body; the fan is placed above the atmospheric column air cooler, and a motor is connected and installed on the fan; one end of the first water cooler and one end of the second water cooler are both communicated with the atmospheric column air cooler; the other end of the first water cooler and the other end of the second water cooler are both communicated with the atmospheric column reflux drum.

[0009] Further defined, a first spiral tube is arranged along the axial direction of the first water cooler in the first water cooler; a first water inlet pipe and a first water outlet pipe are externally connected to the side wall of the first water cooler; a first water cooling cavity is formed between the outer wall of the first spiral tube and the inner wall of the first water cooler; the atmospheric column air cooler is communicated with the atmospheric column reflux drum through the first spiral tube; the first water inlet pipe is communicated with the first water outlet pipe through the first water cooling cavity.

[0010] Further defined, a second spiral tube is arranged along the axial direction of the second water cooler in the second water cooler; a second water inlet pipe and a second water outlet pipe are externally connected to the side wall of the second water cooler; a second water cooling cavity is formed between the outer wall of the second spiral tube and the inner wall of the second water cooler; the atmospheric column air cooler is communicated with the atmospheric column reflux drum through the second spiral tube; the second water inlet pipe is communicated with the second water outlet pipe through the second water cooling cavity.

[0011] Further defined, a first cut-off valve is arranged between the atmospheric column air cooler and the first water cooler; a second cut-off valve is arranged between the atmospheric column air cooler and the second water cooler.

[0012] Further defined, the methanol vapor cooling device further comprises a circulation pump; the input ends of the circulation pump are respectively communicated with the first water outlet pipe and the second water outlet pipe; the output ends of the circulation pump are respectively communicated with the first water inlet pipe and the second water inlet pipe.

[0013] Further defined, the methanol vapor cooling device further comprises a first heat dissipation pipe; both the first water outlet pipe and the second water outlet pipe pass through the first heat dissipation pipe and are communicated with the input end of the circulation pump.

[0014] Further defined, the methanol vapor cooling device further comprises a second heat dissipation pipe; the output ends of the circulation pump are respectively communicated with the first water inlet pipe and the second water inlet pipe after passing through the second heat dissipation pipe.

[0015] Further defined, stop valves are respectively arranged between the first water outlet pipe and the first heat dissipation pipe, between the second water outlet pipe and the first heat dissipation pipe, between the second heat dissipation pipe and the first water inlet pipe, and between the second heat dissipation pipe and the second water inlet pipe.

[0016] Further defined, heat dissipation fins are respectively arranged on the outer wall of the first heat dissipation pipe and the outer wall of the second heat dissipation pipe.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. In the present utility model, two parallel water coolers are added behind the air cooler, and the cooling water between the two water coolers circulates; at the same time, the fan is arranged outside the air cooler; not only the consumption of cooling water is saved, but also the fan is convenient for timely maintenance, realizing efficient cooling of methanol vapor.

[0019] 2. In the present utility model, a first spiral pipe is arranged along the axial direction of the first water cooler in the first water cooler, and a second spiral pipe is arranged along the axial direction of the second water cooler in the second water cooler. During the cooling process, the methanol vapor to be cooled flows through the first spiral pipe and the second spiral pipe. Due to the spiral winding of the spiral pipe, the length of the heat exchange tube bundle is increased, so that the residence time of the methanol vapor to be cooled in the first water cooler and the second water cooler is extended, improving the heat exchange and cooling efficiency.

[0020] 3. In the present utility model, a first cut-off valve is arranged between the air cooler of the atmospheric tower and the first water cooler; a second cut-off valve is arranged between the air cooler of the atmospheric tower and the second water cooler. The switching between the first water cooler and the second water cooler is conveniently controlled through the first cut-off valve and the second cut-off valve.

[0021] 4. In the present utility model, by arranging a circulation pump, a circulating flow state is formed between the water outlet and the water inlet of the two water coolers, greatly reducing the consumption of cooling water. Further, through the first heat dissipation pipe and the second heat dissipation pipe, the cooling water flowing out of the two water coolers is dissipated, and then returned to the water cooler, ensuring that the cooling water is at a low temperature and reducing the consumption of cooling water.

[0022] 5. Heat dissipation fins are respectively arranged on the outer wall of the first heat dissipation pipe and the outer wall of the second heat dissipation pipe, increasing the heat dissipation area, facilitating the heat dissipation of the cooling water, enabling the cooled water to return in time, improving the heat exchange effect, and accelerating the cooling process of the methanol vapor. Description of the Drawings

[0023] Figure 1 It is a front view structural schematic diagram of the methanol vapor cooling device provided by the present utility model;

[0024] Figure 2 It is a sectional view enlarged structural schematic diagram of the first water cooler and the second water cooler provided by the present utility model;

[0025] Figure 3 It is a connection schematic diagram of the first water cooler, the second water cooler and the circulation pump provided by the present utility model;

[0026] Figure 4Schematic enlarged structure diagram of the first heat dissipation pipe provided by the present utility model;

[0027] Wherein:

[0028] 1 - Atmospheric tower body; 2 - Atmospheric tower reflux pump; 3 - Atmospheric tower reflux tank; 4 - Atmospheric tower air cooler; 5 - Fan; 501 - Motor; 6 - First water cooler; 601 - First spiral pipe; 602 - First water inlet pipe; 603 - First water outlet pipe; 7 - Second water cooler; 701 - Second spiral pipe; 702 - Second water inlet pipe; 703 - Second water outlet pipe; 8 - First steam inlet pipe; 801 - First cut-off valve; 9 - Second steam inlet pipe; 901 - Second cut-off valve; 10 - First liquid outlet pipe; 11 - Second liquid outlet pipe; 12 - First stop valve; 13 - First circulation pipe; 14 - First heat dissipation pipe; 15 - Circulation pump; 16 - Second heat dissipation pipe; 17 - Second circulation pipe; 18 - Second stop valve; 19 - Third stop valve; 20 - Fourth stop valve; 21 - Heat sink. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] Embodiment 1

[0031] Refer to Figure 1 , the methanol vapor cooling device provided in this embodiment includes an atmospheric tower body 1, an atmospheric tower reflux tank 3, an atmospheric tower air cooler 4, a fan 5, a first water cooler 6, and a second water cooler 7; the top of the atmospheric tower body 1 is sequentially connected to the side of the atmospheric tower body 1 through the atmospheric tower air cooler 4 and the atmospheric tower reflux tank 3. After the methanol vapor flowing out from the top of the atmospheric tower body 1 is cooled by the atmospheric tower air cooler 4 and the atmospheric tower reflux tank 3 in sequence, it enters the atmospheric tower body 1 from the side of the atmospheric tower body 1. The fan 5 is placed above the atmospheric tower air cooler 4, and a motor 501 is connected and installed on the fan 5; one end of the first water cooler 6 and one end of the second water cooler 7 are both connected to the atmospheric tower air cooler 4; the other end of the first water cooler 6 and the other end of the second water cooler 7 are both connected to the atmospheric tower reflux tank 3.

[0032] In this embodiment, the atmospheric column body 1 is a methanol recovery column in the methanol rectification system, and methanol vapor is produced at the top of the column. The main function of the atmospheric column reflux drum 3 is to collect the cooled methanol vapor; then, the methanol condensate obtained by cooling is refluxed into the atmospheric column body 1 again through the atmospheric column reflux pump 2. By cooling the methanol vapor, the pressure at the top of the atmospheric column body 1 is reduced, the rectification efficiency of methanol is improved, and the quality of the refined methanol produced is ensured.

[0033] In this embodiment, the fan 5 is arranged outside the atmospheric column air cooler 4, and the fan 5 is arranged opposite to the fins provided on the outer wall of the atmospheric column air cooler 4, so as to drive the fan 5 by electric energy to complete the heat dissipation of the fins on the atmospheric column air cooler 4. Arranging the fan 5 outside the atmospheric column air cooler 4 facilitates the maintenance and replacement of the fan 5. Preferably, two fans 5 are arranged, one for standby. When one of the fans 5 fails, the other fan 5 can be quickly started to work.

[0034] In this embodiment, a motor 501 is connected to the fan 5, and the fan 5 is driven to work by the motor 501.

[0035] In this embodiment, the first water cooler 6 and the second water cooler 7 are arranged in parallel to form a parallel circuit. One end of the parallel circuit is connected to the atmospheric column air cooler 4, and the other end of the parallel circuit is connected to the atmospheric column reflux drum 3.

[0036] Preferably, the structures of the first water cooler 6 and the second water cooler 7 are the same. During water cooling, the cooling water and the methanol vapor to be cooled flow through different paths and in opposite directions. Exemplarily, the cooling water enters from the bottom and exits from the top and flows from right to left, and the methanol vapor to be cooled flows from left to right. A countercurrent is formed between the cooling water and the methanol vapor to be cooled, with a long contact time and a long heat exchange time, improving the cooling effect.

[0037] In this embodiment, there are the following two paths for the cooling process of the methanol vapor.

[0038] The first path: The atmospheric column body 1 is connected to the atmospheric column reflux drum 3 through the atmospheric column air cooler 4 and the first water cooler 6 in sequence. That is, the methanol vapor first passes through the atmospheric column air cooler 4, and the fan 5 is used to dissipate the heat of the fins of the atmospheric column air cooler 4 to conduct the first-stage heat exchange cooling on the methanol vapor; then it continues to pass through the first water cooler 6, and the cooling water is used to conduct the second-stage heat exchange cooling on the methanol vapor flowing into the first water cooler 6 (after the first-stage heat exchange cooling) to obtain methanol condensate.

[0039] The second path: The main body 1 of the atmospheric tower is connected to the reflux drum 3 of the atmospheric tower after passing through the air cooler 4 of the atmospheric tower and the second water cooler 7 in sequence. That is, the methanol vapor first passes through the air cooler 4 of the atmospheric tower, and the fins of the air cooler 4 of the atmospheric tower are dissipated by the fan 5 to perform the first-stage heat exchange and cooling on the methanol vapor; then it passes through the second water cooler 7, and the methanol vapor flowing into the second water cooler 7 (after the first-stage heat exchange and cooling) is subjected to the second-stage heat exchange and cooling by using cooling water to obtain methanol condensate.

[0040] During implementation, the above two paths perform two-stage cooling on the methanol vapor by combining air cooling and water cooling, greatly reducing the top pressure of the main body 1 of the atmospheric tower and improving the heat exchange efficiency; at the same time, it also saves the consumption of cooling water.

[0041] Select and switch according to the actual situation. To facilitate the switching between the two paths, a first cut-off valve 801 is provided between the air cooler 4 of the atmospheric tower and the first water cooler 6; a second cut-off valve 901 is provided between the air cooler 4 of the atmospheric tower and the second water cooler 7; according to the actual cooling requirement, the first cut-off valve 801 or / and the second cut-off valve 901 is opened to conduct the first water cooler 6 or / and the second water cooler 7, and the first path and / or the second path is adopted to complete the cooling. Especially in summer with high temperature, the first water cooler 6 and the second water cooler 7 are opened simultaneously. By paralleling two water coolers after the air cooler 4 of the atmospheric tower, the heat exchange efficiency is further improved, meeting the normal production in hot summer weather. In addition, during use, if the first water cooler 6 or the second water cooler 7 fails, the first cut-off valve 801 or the second cut-off valve 901 can also be switched to ensure the cooling efficiency of the methanol vapor and achieve flexible control.

[0042] Embodiment 2

[0043] See Figure 2 , on the basis of Embodiment 1, for the methanol vapor cooling device provided in this embodiment, a first spiral tube 601 is arranged along the axial direction of the first water cooler 6 in the first water cooler 6; a first water inlet pipe 602 and a first water outlet pipe 603 are externally connected to the side wall of the first water cooler 6; a first water cooling cavity is formed between the outer wall of the first spiral tube 601 and the inner wall of the first water cooler 6; the air cooler 4 of the atmospheric tower is connected to the reflux drum 3 of the atmospheric tower through the first spiral tube 601; the first water inlet pipe 602 is connected to the first water outlet pipe 603 through the first water cooling cavity.

[0044] Specifically, the first water cooler 6 is of a cylindrical structure and is placed horizontally. A first water outlet pipe 603 is externally connected to the upper side wall of the first water cooler 6, and a first water inlet pipe 602 is externally connected to the lower side wall of the first water cooler 6. The first water outlet pipe 603 is located at the left end, and the first water inlet pipe 602 is located at the right end, so that cooling water enters the first water cooling chamber in the first water cooler 6 in a flow mode of entering from the lower part and flowing out from the higher part and from right to left. A first spiral pipe 601 is arranged along the axial direction in the first water cooler 6. The spiral direction of the first spiral pipe 601 is the same as the axial direction of the first water cooler 6. The left end of the first spiral pipe 601 is communicated with the atmospheric tower air cooler 4 through a first steam inlet pipe 8, and the right end of the first spiral pipe 601 is communicated with the atmospheric tower reflux tank 3 through a first liquid outlet pipe 10. During implementation, since the cooling water flows in the first water cooling chamber, the methanol vapor to be cooled enters the first spiral pipe 601 through the first steam inlet pipe 8, and the methanol to be cooled spirally flows in the first spiral pipe 601, which prolongs the residence time of the methanol to be cooled in the first water cooler 6, makes the heat exchange more sufficient, and improves the heat exchange and cooling effect.

[0045] In this embodiment, a second spiral pipe 701 is arranged along the axial direction of the second water cooler 7 in the second water cooler 7; a second water inlet pipe 702 and a second water outlet pipe 703 are externally connected to the side wall of the second water cooler 7; a second water cooling chamber is formed between the outer wall of the second spiral pipe 701 and the inner wall of the second water cooler 7; the atmospheric tower air cooler 4 is communicated with the atmospheric tower reflux tank 3 through the second spiral pipe 701; the second water inlet pipe 702 is communicated with the second water outlet pipe 703 through the second water cooling chamber.

[0046] Specifically, the second water cooler 7 is of a cylindrical structure and is placed horizontally. A second water outlet pipe 703 is externally connected to the upper side wall of the second water cooler 7, and a second water inlet pipe 702 is externally connected to the lower side wall of the second water cooler 7. The second water outlet pipe 703 is located at the left end, and the second water inlet pipe 702 is located at the right end, so that cooling water enters the second water cooling chamber in the second water cooler 7 in a flow mode of entering from the lower part and flowing out from the higher part and from right to left. A second spiral pipe 701 is arranged along the axial direction in the second water cooler 7. The spiral direction of the second spiral pipe 701 is the same as the axial direction of the second water cooler 7. The left end of the second spiral pipe 701 is communicated with the atmospheric tower air cooler 4 through a second steam inlet pipe 9, and the right end of the second spiral pipe 701 is communicated with the atmospheric tower reflux tank 3 through a second liquid outlet pipe 11. During implementation, since the cooling water flows in the first water cooling chamber, the methanol vapor to be cooled enters the second spiral pipe 701 through the second steam inlet pipe 9, and the methanol to be cooled spirally flows in the second spiral pipe 701, which prolongs the residence time of the methanol to be cooled in the second water cooler 7, makes the heat exchange more sufficient, and improves the heat exchange and cooling effect.

[0047] In this embodiment, a first cut-off valve 801 is installed on the first steam inlet pipe 8, and a second cut-off valve 901 is installed on the second steam inlet pipe 9.

[0048] Example 3

[0049] Refer to Figure 3 , on the basis of Example 2, the methanol vapor cooling device provided in this example further includes a circulation pump 15; the input ends of the circulation pump 15 are respectively communicated with the first water outlet pipe 603 and the second water outlet pipe 703; the output ends of the circulation pump 15 are respectively communicated with the first water inlet pipe 602 and the second water inlet pipe 702.

[0050] In this example, the circulation pump 15 enables a circulation to be formed between the inlet and outlet of the cooling water in the first water cooler 6, and at the same time, a circulation is also formed between the inlet and outlet of the cooling water in the second water cooler 7, further saving the consumption of cooling water and reducing the processing cost.

[0051] In this example, the methanol vapor cooling device further includes a first radiating pipe 14; both the first water outlet pipe 603 and the second water outlet pipe 703 pass through the first radiating pipe 14 and are communicated with the input end of the circulation pump 15. The methanol vapor cooling device further includes a second radiating pipe 16; the output end of the circulation pump 15 is respectively communicated with the first water inlet pipe 602 and the second water inlet pipe 702 after passing through the second radiating pipe 16.

[0052] During use, when the cooling water circulates in the first water cooler 6 and the second water cooler 7, since the cooling water flowing out from the first water outlet pipe 603 and the cooling water flowing out from the second water outlet pipe 703 both absorb the heat of the methanol vapor, the two outlet waters respectively flow through the first radiating pipe 14 for heat dissipation, and then enter the second radiating pipe 16 through the circulation pump 15 for secondary heat dissipation. The cooling water with reduced temperature then enters the corresponding first water cooler 6 and second water cooler 7 from the first water inlet pipe 602 and the second water inlet pipe 702 respectively. Through two-stage heat dissipation, the temperature of the cooling water flowing out from the two water coolers (the cooling water that absorbs the heat of the methanol vapor) is reduced to the greatest extent, realizing the circulation of the cooling water and saving the consumption of the cooling water.

[0053] In this example, to facilitate the entry and exit of the cooling water in the first radiating pipe 14 and the second radiating pipe 16, a first circulation pipe 13 and a second circulation pipe 17 are provided. One end of the first circulation pipe 13 is respectively communicated with the first water outlet pipe 603 and the second water outlet pipe 703, and the other end of the first circulation pipe 13 is communicated with the first radiating pipe 14; one end of the second circulation pipe 17 is communicated with the second radiating pipe 16, and the other end of the second circulation pipe 17 is respectively communicated with the first water inlet pipe 602 and the second water inlet pipe 702.

[0054] In this example, stop valves are respectively provided between the first water outlet pipe 603 and the first radiating pipe 14, between the second water outlet pipe 703 and the first radiating pipe 14, between the second radiating pipe 16 and the first water inlet pipe 602, and between the second radiating pipe 16 and the second water inlet pipe 702.

[0055] Preferably, a first check valve 12 is provided between the first water outlet pipe 603 and the first radiating pipe 14, a second check valve 18 is provided between the second radiating pipe 16 and the first water inlet pipe 602, and a third check valve 19 is provided between the second water outlet pipe 703 and the first radiating pipe 14; a fourth check valve 20 is provided between the second radiating pipe 16 and the second water inlet pipe 702, which facilitates the conduction and closing between each pipeline.

[0056] Taking the simultaneous opening of the first water cooler 6 and the second water cooler 7 as an example to illustrate the circulating heat dissipation process. Open the circulating pump 15, the first check valve 12, the second check valve 18, the third check valve 19 and the fourth check valve 20, so that the cooling water inside the first water cooler 6 and the water inside the second water cooler 7 both flow out through the first circulating pipe 13, and successively pass through the first radiating pipe 14, the circulating pump 15 and the second radiating pipe 16, and then flow back through the second circulating pipe 17 to form a circulating flow state, which not only realizes the cooling of the cooling water, but also can adjust the two water coolers to the antifreeze standby state, achieving the purpose of saving circulating water.

[0057] See Figure 4 , in order to improve the heat dissipation efficiency of the first radiating pipe 14 and the second radiating pipe 16, heat dissipation fins 21 are respectively provided on the outer wall of the first radiating pipe 14 and the outer wall of the second radiating pipe 16.

[0058] Preferably, there are a plurality of heat dissipation fins 21, which are arranged at equal intervals along the axial direction of the first radiating pipe 14 on the outer wall of the first radiating pipe 14; at the same time, they are also arranged at equal intervals along the axial direction of the second radiating pipe 16 on the outer wall of the second radiating pipe 16. By arranging the heat dissipation fins 21, the heat dissipation area is enlarged, which is convenient for dissipating the heat absorbed by the cooling water, reducing the supplement of the cooling water, and improving the heat exchange efficiency of the water cooler while saving water.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all 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.

Claims

1. A methanol vapor cooling device, characterized in that, It includes an atmospheric column body (1), an atmospheric column reflux drum (3), an atmospheric column air cooler (4), a fan (5), a first water cooler (6) and a second water cooler (7); the methanol vapor flowing out from the top of the atmospheric column body (1) is cooled by the atmospheric column air cooler (4) and the atmospheric column reflux drum (3) in sequence and then enters the atmospheric column body (1) from the side of the atmospheric column body (1). The fan (5) is placed above the atmospheric column air cooler (4), and a motor (501) is connected and installed on the fan (5); one end of the first water cooler (6) and one end of the second water cooler (7) are both communicated with the atmospheric column air cooler (4); the other end of the first water cooler (6) and the other end of the second water cooler (7) are both communicated with the atmospheric column reflux drum (3).

2. The methanol vapor cooling device according to claim 1, wherein A first spiral tube (601) is arranged along the axial direction of the first water cooler (6) inside the first water cooler (6); a first water inlet pipe (602) and a first water outlet pipe (603) are externally connected to the side wall of the first water cooler (6); a first water cooling cavity is formed between the outer wall of the first spiral tube (601) and the inner wall of the first water cooler (6); the atmospheric column air cooler (4) is communicated with the atmospheric column reflux drum (3) through the first spiral tube (601); the first water inlet pipe (602) is communicated with the first water outlet pipe (603) through the first water cooling cavity.

3. The methanol vapor cooling device according to claim 2, wherein A second spiral tube (701) is arranged along the axial direction of the second water cooler (7) inside the second water cooler (7); a second water inlet pipe (702) and a second water outlet pipe (703) are externally connected to the side wall of the second water cooler (7); a second water cooling cavity is formed between the outer wall of the second spiral tube (701) and the inner wall of the second water cooler (7); the atmospheric column air cooler (4) is communicated with the atmospheric column reflux drum (3) through the second spiral tube (701); the second water inlet pipe (702) is communicated with the second water outlet pipe (703) through the second water cooling cavity.

4. The methanol vapor cooling device according to claim 1, characterized in that, A first cut-off valve (801) is arranged between the atmospheric column air cooler (4) and the first water cooler (6); a second cut-off valve (901) is arranged between the atmospheric column air cooler (4) and the second water cooler (7).

5. The methanol vapor cooling device according to claim 3, characterized in that, The methanol vapor cooling device further includes a circulation pump (15); the input ends of the circulation pump (15) are respectively communicated with the first water outlet pipe (603) and the second water outlet pipe (703); the output ends of the circulation pump (15) are respectively communicated with the first water inlet pipe (602) and the second water inlet pipe (702).

6. The methanol vapor cooling device according to claim 5, characterized in that, The methanol vapor cooling device further includes a first heat dissipation pipe (14); the first water outlet pipe (603) and the second water outlet pipe (703) both pass through the first heat dissipation pipe (14) and are communicated with the input end of the circulation pump (15).

7. The methanol vapor cooling device according to claim 6, characterized in that The methanol vapor cooling device further includes a second heat dissipation pipe (16); the output end of the circulation pump (15) is respectively communicated with the first water inlet pipe (602) and the second water inlet pipe (702) after passing through the second heat dissipation pipe (16).

8. The methanol vapor cooling device according to claim 7, wherein A check valve is respectively arranged between the first water outlet pipe (603) and the first heat dissipation pipe (14), between the second water outlet pipe (703) and the first heat dissipation pipe (14), between the second heat dissipation pipe (16) and the first water inlet pipe (602), and between the second heat dissipation pipe (16) and the second water inlet pipe (702).

9. The methanol vapor cooling device according to claim 7, characterized in that, Heat dissipation fins (21) are respectively arranged on the outer walls of the first heat dissipation pipe (14) and the second heat dissipation pipe (16).

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