Cooling device for mixed solvent separation and recovery system

Abstract

The utility model discloses a cooling device for a mixed solvent separation and recovery system, and belongs to the technical field of new electronic material preparation devices. Comprising a cooling cylinder, a steam infusion port, a condensate discharge port, a cooling liquid infusion port, a cooling interlayer and a spacing layer plate, a cooling interlayer structure is arranged in the side wall of the cooling cylinder; a cooling liquid infusion port is formed below the cooling cylinder; the cooling liquid infusion port is communicated with the cooling interlayer; mixed solvent steam is fed into the cooling cylinder from the steam infusion port; condensed liquid of the mixed solvent steam is discharged from a condensed liquid discharging opening and is recycled; a plurality of spacing layer plates are arranged in the cooling cylinder, and the internal space of the cooling cylinder is divided into a plurality of steam flow channels by the spacing layer plates; the two ends of the spacing layer plate are not connected with the two ends of the cooling cylinder, and a certain distance is kept between the spacing layer plate and the cooling cylinder. According to the utility model, the problems of insufficient utilization of cooling resources and reduced condensation efficiency caused by non-uniform distribution of mixed solvent steam entering a cooling device at present are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new electronic material preparation devices, and particularly relates to a cooling device for a mixed solvent separation and recovery system. Background Art

[0002] A mixture of propylene glycol methyl ether acetate (PGMEA) and propylene glycol methyl ether (PGME) is an excellent dilution and cleaning solvent used in the electronics industry. After dilution and cleaning, waste diluent containing substances such as PGMEA, PGME and water is produced. PGMEA and PGME will form azeotropes with water; therefore, after diluting and cleaning electronic materials, the PGME+PGME mixed solvent needs to be recovered by distillation. The different vaporization points of different substances in the mixed liquid are used to recover the mixed solvent by heating and distillation; the mixed liquid is heated by distillation, and the mixed solvent therein reaches the vaporization point first, forming mixed solvent vapor. The mixed solvent vapor is introduced into a cooling device, and a lower temperature environment is formed in the cooling device; the mixed solvent vapor condenses in a low temperature environment to form a mixed solvent condensate, thereby realizing the recovery of the mixed solvent.

[0003] After the mixed solvent vapor enters the cooling device, most of the vapor will be concentrated in the area near the steam inlet, and then slowly move toward the outlet side, completing cooling and condensation during the movement; and most of the vapor will be concentrated in the upper area of ​​the cooling device, and then slowly descend; this will cause the steam in the cooling device to be unevenly distributed, and a large amount of steam will be concentrated on consuming the low-temperature cooling resources at the upper part of the cooling device, resulting in uneven distribution, some steam will not have time to condense quickly, and the cooling resources at the lower part will not be fully utilized. Utility Model Content

[0004] The utility model provides a cooling device for a mixed solvent separation and recovery system, which is divided into a plurality of flow channels. After the steam enters the cooling device, it is evenly distributed to each flow channel, so that the steam is evenly distributed in various areas from the moment it enters the cooling device; it is conducive to fully absorbing low-temperature cooling resources, breaking up the situation where a large amount of steam agglomerates, and also helping the steam to quickly cool and condense, reducing the amount of steam that cannot be condensed; it is conducive to achieving efficient recovery; the utility model solves the problem that the current mixed solvent steam is unevenly distributed after entering the cooling device, resulting in insufficient utilization of cooling resources and reduced condensation efficiency.

[0005] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions:

[0006] A cooling device for a mixed solvent separation and recovery system, comprising: a cooling cylinder, a steam inlet, a condensate outlet, a coolant inlet, a cooling interlayer, and a spacer plate;

[0007] A cooling interlayer structure is provided inside the side wall of the cooling cylinder;

[0008] A cooling liquid infusion port is provided below the cooling cylinder; an upper opening of the cooling liquid infusion port is communicated with the cooling interlayer, and a lower opening of the cooling liquid infusion port is located outside the cooling cylinder;

[0009] The cooling cylinder is provided with a steam inlet, and the mixed solvent steam is fed into the cooling cylinder from the steam inlet;

[0010] A condensate discharge port is provided below the cooling cylinder, and the condensate of the mixed solvent vapor is discharged from the condensate discharge port and recovered;

[0011] A plurality of spacer plates are provided inside the cooling cylinder, and the spacer plates divide the internal space of the cooling cylinder into a plurality of interconnected steam flow channels;

[0012] The two ends of the spacer plate are not connected to the two ends of the cooling cylinder, and there is a certain distance between them.

[0013] Preferably, the steam lower opening at the lower end of the steam infusion port extends all the way to the bottommost layer of steam flow channel;

[0014] Except for the bottom layer of steam flow channel, the steam inlet is directly opposite to each layer of steam flow channel, and a steam side opening is opened on the side wall of the steam inlet.

[0015] Preferably, the coolant inlet passes through the spacer plate, and the upper end opening of the coolant inlet extends all the way to the steam flow channel of the first uppermost layer;

[0016] An annular cooling pipe is provided at the upper opening of the cooling liquid infusion port, and the annular cooling pipe is communicated with the cooling liquid infusion port;

[0017] Except for the steam flow channels in the first layer and the bottom layer, an annular cooling pipe is provided on the side wall of the coolant inlet located in each layer of the steam flow channel, and the annular cooling pipe is communicated with the coolant inlet.

[0018] Preferably, the cooling liquid infusion port is located on the side wall of the cooling interlayer and an interlayer opening is opened; the cooling liquid flows into the cooling interlayer from the interlayer opening.

[0019] Preferably, a plurality of liquid seepage holes are provided on the surface of the spacer layer;

[0020] The mixed solvent vapor condensed on the spacer layer can drip from the seepage holes.

[0021] Preferably, a steam reflux port is provided on the cooling cylinder and is located on the opposite side of the steam infusion port;

[0022] The lower end opening of the steam reflux port is communicated with the interior of the cooling cylinder;

[0023] The upper end opening of the steam reflux port is communicated with the steam infusion port through a reflux pipe.

[0024] Preferably, the bottom of the cooling cylinder is a sloped structure;

[0025] The condensate discharge port is located at the upper end opening inside the cooling cylinder and is arranged at the lowest point of the slope-shaped structure.

[0026] Preferably, a plurality of ridges are provided on the inner side wall of the cooling cylinder at equal intervals;

[0027] A guide groove is formed between two adjacent ridges;

[0028] The condensate attached to the inner wall of the cooling cylinder can flow along the guide groove to the bottom of the cooling cylinder.

[0029] Preferably, a drain port is provided below the cooling cylinder;

[0030] The upper end opening of the drain port is communicated with the interior of the cooling cylinder, and the lower end opening of the drain port is located outside the cooling cylinder;

[0031] A detachable sealing plug is provided in the drain port.

[0032] Preferably, a pressure gauge is provided above the cooling cylinder;

[0033] The pressure gauge is used to monitor the steam pressure in the cooling cylinder.

[0034] The beneficial effects of the utility model are:

[0035] The utility model provides a cooling device for a mixed solvent separation and recovery system. In the cooling cylinder, the space inside the cooling cylinder is divided into a plurality of steam flow channels by a spacer layer plate, and each steam flow channel has a corresponding opening on the steam inlet. Steam coming out of the corresponding opening can directly enter the corresponding steam flow channel. Steam is transported in different flow channels, which can achieve uniform distribution of steam in the cooling cylinder and make full use of low-temperature cooling resources.

[0036] A group of annular cooling pipes connected to the coolant inlet is correspondingly provided in each layer of the steam flow channel; the annular cooling pipes can accelerate the condensation of the mixed solvent vapor in the steam flow channel of the corresponding layer.

[0037] A plurality of seepage holes are provided on the surface of the spacer layer, and the mixed solvent condensate condensed on the surface of the spacer layer can drip from the seepage holes.

[0038] The bottom of the cooling cylinder is in a sloped structure, and the mixed solvent condensate collected at the bottom of the cooling cylinder can flow along the sloped bottom and eventually be discharged from the condensate discharge port, thereby accelerating the discharge and recovery efficiency of the condensate.

[0039] A steam reflux port is provided on the cold cutting cylinder, and the steam reflux port is connected to the steam infusion port; a small amount of mixed solvent steam that has not been cooled and condensed in the cooling cylinder can flow back from the steam reflux port to the steam infusion port for a second time to be cooled and condensed again.

[0040] Several ridges are arranged at equal intervals on the inner wall of the cooling cylinder, and guide grooves are formed between two adjacent ridges; the condensate attached to the inner wall of the cooling cylinder can be accelerated along the guide groove to gather at the bottom of the cooling cylinder, and finally be discharged along the sloped bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 This is a schematic diagram of the external overall structure of the utility model;

[0043] Figure 2 This is a schematic diagram of the overall internal cross-section structure of the utility model;

[0044] Figure 3 This is a schematic diagram of the planar structure of the utility model in which ridges are provided on the inner wall of the cooling cylinder to form guide grooves;

[0045] Figure 4 It is a side plan view schematic diagram of the connection structure between the spacer layer plate in the cooling cylinder and the inner wall of the cooling cylinder of the present invention.

[0046] In the accompanying drawings, the structural names represented by the reference numerals are:

[0047] 1-Cooling cylinder, 101-Flange, 102-Sealing cover, 103-Cooling interlayer, 104-Ridge, 2-Support plate, 3-Support, 4-Steam infusion port, 401-Steam side port, 402-Steam lower port, 5-Condensate discharge port, 6-Steam reflux port, 7-Reflux pipe, 701-Valve, 8-Cooling liquid infusion port, 801-Interlayer port, 802-Annular cooling pipe, 9-Drain port, 10-Pressure gauge, 11-Spacer plate. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Example 1

[0050] A cooling device for a mixed solvent separation and recovery system, comprising: a cooling cylinder 1, a steam inlet 4, a condensate outlet 5, a cooling liquid inlet 8, a cooling interlayer 103, and a spacer plate 11;

[0051] like Figure 1 As shown, the cooling cylinder 1 is a cylindrical structure with a hollow interior and an open structure on one side. The purpose of the reserved opening structure is to facilitate cleaning or maintenance of the cooling cylinder 1. A flange 101 is provided on the edge of the opening structure, and a sealing cover 102 is fixed to the flange 101 by screws and nuts.

[0052] Below the cooling cylinder 1, a supporting plate 2 is provided on each side close to the cooling cylinder 1, and a support 3 is provided below the supporting plate 2; the entire cooling cylinder 1 is supported by the supporting plate 2 and the support 3.

[0053] like Figure 2 As shown, a cooling interlayer 103 is provided inside the side wall of the cooling cylinder 1, which is used to pour the cooling liquid for cooling the cooling cylinder 1 into the cooling interlayer 103 structure; the outer surface of the cooling cylinder 1 can be coated with a thermal insulation material or covered with a thermal insulation material, so that the low temperature environment in the cooling cylinder 1 can be maintained for a long time; a cooling liquid infusion port 8 is provided below the cooling cylinder 1, and the upper end of the cooling liquid infusion port 8 is communicated with the cooling interlayer 103 structure, and the lower end opening of the cooling liquid infusion port 8 is located outside the cooling cylinder 1. The lower end opening of the cooling liquid infusion port 8 is connected to the cooling liquid pipeline, and the cooling liquid is poured into the cooling interlayer 103 structure through the cooling liquid pipeline, and the cooling liquid forms a low-temperature cooling environment in the cooling cylinder 1.

[0054] A steam infusion port 4 is provided above the cooling cylinder 1 and on the left side of the cooling cylinder 1. The steam lower port 402 at the lower end of the steam infusion port 4 is located inside the cooling cylinder 1, and the upper end opening of the steam infusion port 4 is located outside the cooling cylinder 1. A flange is provided at the edge of the upper end opening of the steam infusion port 4, and an infusion pipeline is connected to the flange by screws and nuts. The infusion pipeline is then connected to the mixed solvent steam pipeline, and the mixed solvent steam enters the cooling cylinder 1 through the steam infusion port 4.

[0055] A condensate discharge port 5 is provided below the cooling cylinder 1 and close to the right side of the cooling cylinder 1. The mixed solvent vapor enters the cooling cylinder 1. Under the action of low-temperature cooling, the mixed solvent vapor forms condensate. These condensates are the mixed solvent condensates that need to be recovered. The condensate gathered at the bottom of the cooling cylinder is discharged and collected from the condensate discharge port 5.

[0056] The steam inlet 4 is located on the left side above the cooling cylinder 1. After the mixed solvent vapor enters the cooling cylinder 1, most of the vapor will be concentrated in the area at the steam inlet, and then slowly diffuse and move toward the outlet side to complete cooling and condensation; and most of the vapor will be concentrated in the upper area of ​​the cooling cylinder 1, and then slowly descend; this will cause uneven distribution of steam in the cooling device, and a large amount of steam will concentrate on consuming the low-temperature cooling resources on the upper side of the cooling device, resulting in uneven distribution, and some steam will not have time to condense quickly, while the cooling resources on the lower side cannot be fully utilized.

[0057] like Figure 2 As shown, in this embodiment, two spacer plates 11 are provided inside the cooling cylinder 1. The two spacer plates 11 divide the interior of the cooling cylinder 1 into three steam flow channels. Steam can pass through each steam flow channel. This forced separation makes the steam distribution in the cooling cylinder 1 more uniform.

[0058] like Figure 4 As shown, both sides of the spacer plate 11 are connected to the side walls of the cooling cylinder 1; Figure 2 As shown, there is no connection between the two ends of the spacer layer 11 and the two ends of the cooling cylinder 1, and a certain distance is maintained between the two ends of the spacer layer 11 and the inner wall of the cooling cylinder 1, that is, the spacer layer 11 does not form three completely enclosed spaces in the cooling cylinder 1, so that the low-temperature cold air in the cooling cylinder 1 can diffuse in the cooling cylinder 1.

[0059] In order to make the mixed solvent vapor evenly distributed in the steam flow channel as soon as it enters the cooling cylinder 1, Figure 2As shown, as a preferred embodiment, the steam lower port 402 at the lower end of the steam inlet 4 is designed to extend all the way to the lowest steam flow channel; except for the lowest steam flow channel, each of the remaining steam flow channels facing the steam inlet 4 and located at the side wall of the steam inlet 4 are provided with a steam side port 401. When steam enters the cooling cylinder 1 from the steam inlet 4, the mixed solvent steam output from the steam lower port 402 enters the steam flow channel at the bottom layer, and the mixed solvent steam output from each of the remaining steam side ports 401 enters the corresponding steam flow channel. In this way, the steam input into the cooling cylinder 1 can be evenly distributed to various areas within the cooling cylinder 1, avoiding the concentrated accumulation of steam, making full use of the low-temperature cooling resources within the cooling cylinder 1, allowing the mixed solvent steam to complete cooling and condensation as much as possible, and improving the cooling and condensation efficiency of the mixed solvent.

[0060] The mixed solvent vapor is cooled and condensed in each steam flow channel to form a condensate, a part of which adheres to the side wall of the cooling cylinder 1 and flows to the spacer plate 11; the other part condenses directly on the spacer plate 11; these mixed solvent condensates flow from the spacer plate 11 to the bottom of the cooling cylinder 1, and are then discharged from the condensate outlet 5.

[0061] As a preferred embodiment, in order to speed up the rate at which the condensate on the spacer plate 11 drops to the bottom of the cooling cylinder 1, as Figure 2 As shown, a plurality of seepage holes are opened on the surface of the spacer plate 11 , and the condensate attached to the spacer plate 11 can drip downward from the seepage holes, thereby accelerating the condensate to gather at the bottom of the cooling cylinder 1 .

[0062] like Figure 1 As shown, a drain port 9 is provided below the cooling cylinder 1; the upper end of the drain port 9 communicates with the interior of the cooling cylinder 1, while the lower end of the drain port 9 is located outside the cooling cylinder 1. A removable sealing plug is provided within the drain port 9. After the mixed solvent recovery operation is completed, the drain port 9 is opened to discharge the residual steam in the cooling cylinder 1. The cooling cylinder 1 is then cleaned, and the wastewater is discharged from the drain port 9 after the cleaning is complete.

[0063] A pressure gauge 10 is provided above the cooling cylinder 1 ; the pressure gauge 10 is used to monitor the steam pressure in the cooling cylinder 1 .

[0064] Example 2

[0065] Based on Example 1, in Example 1, the low-temperature cooling environment in the cooling cylinder 1 is completely achieved by the coolant poured into the cooling interlayer 103; the cold air formed by the coolant in the cooling interlayer 103 gradually diffuses in the various steam flow channels in the cooling cylinder 1, and finally creates a low-temperature cooling environment in the cooling cylinder 1.

[0066] In order to further improve the cooling and condensation efficiency of the mixed solvent vapor in each steam flow channel, Figure 2 As shown, the coolant inlet 8 passes through the two spacer plates 11, and the upper end opening of the coolant inlet 8 extends all the way to the steam flow channel of the first layer at the top; an annular cooling pipe 802 is provided at the upper end opening of the coolant inlet 8, and the annular cooling pipe 802 is communicated with the coolant inlet 8;

[0067] An annular cooling pipe 802 is provided on the side wall of each layer of the steam flow channel at the coolant inlet 8. The annular cooling pipe 802 communicates with the coolant inlet 8. Through the coolant inlet 8, coolant can be poured into the annular cooling pipe 802 in each layer of the steam flow channel. In addition to cooling the entire low-temperature environment within the cooling cylinder 1, the annular cooling pipe 802 provided in each steam flow channel can cool and condense the mixed solvent vapor, greatly improving the condensation efficiency of the mixed solvent.

[0068] The cooling liquid inlet port 8 is located on the side wall of the cooling interlayer 103 and an interlayer opening 801 is opened; the cooling liquid in the cooling liquid inlet port 8 flows into the cooling interlayer 103 through the interlayer opening 801 .

[0069] Example 3

[0070] Based on Example 1, the mixed solvent vapor enters the cooling cylinder 1, and most of the vapor condenses at low temperature to form cooling condensate; however, there may be a small amount of vapor that has not yet condensed.

[0071] like Figure 2 As shown, a steam return port 6 is provided on the cooling cylinder 1 and on the opposite side of the steam inlet 4; the lower end opening of the steam return port 6 is communicated with the interior of the cooling cylinder 1; in this embodiment, two groups of steam return ports 6 are provided; the upper end opening of the steam return port 6 is communicated with the steam inlet 4 through a reflux pipe 7.

[0072] A small amount of mixed solvent vapor that has not been cooled and condensed in the cooling cylinder 1 can flow back from the steam reflux port 6 to the steam inlet port 4 for a second time and be cooled and condensed again.

[0073] Example 4

[0074] Based on Example 1, in Example 1, the mixed solvent condensate will eventually gather at the bottom of the cooling cylinder 1 and be discharged and recovered from the condensate discharge port 5; however, the bottom of the cooling cylinder 1 is a horizontal structure, and the condensate gathered at the bottom flows slowly, which makes the overall discharge rate of the condensate slow.

[0075] like Figure 2As shown, the bottom of the cooling drum 1 is designed to have a sloped structure; the condensate outlet 5 is located at the upper end of the cooling drum 1 and is positioned at the lowest point of the slope. Condensate collected at the bottom of the cooling drum flows along the sloped bottom, increasing the efficiency of condensate discharge from the condensate outlet 5.

[0076] Example 5

[0077] Based on Example 1, in Example 1, part of the condensate of the mixed solvent vapor is attached to the inner wall of the cooling cylinder, in order to make the condensate on the inner wall more easily aggregated, thereby accelerating the flow rate along the inner wall; Figure 3 As shown, in this embodiment, a plurality of ridges 104 are arranged at equal intervals on the inner wall of the cooling cylinder 1; a guide groove is formed between two adjacent ridges 104; the condensate attached to the inner wall of the cooling cylinder is concentrated in each backflow groove, and can be accelerated along the flow channel of the guide groove to gather to each spacing layer plate 11, and finally gather at the bottom of the cooling cylinder 1.

[0078] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0079] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cooling device for a mixed solvent separation and recovery system, characterized in that: include: Cooling cylinder, steam inlet, condensate outlet, coolant inlet, cooling interlayer, spacer plate; A cooling interlayer structure is provided inside the side wall of the cooling cylinder; A cooling liquid infusion port is provided below the cooling cylinder; an upper opening of the cooling liquid infusion port is communicated with the cooling interlayer, and a lower opening of the cooling liquid infusion port is located outside the cooling cylinder; The cooling cylinder is provided with a steam inlet, and the mixed solvent steam is fed into the cooling cylinder from the steam inlet; A condensate discharge port is provided below the cooling cylinder, and the condensate of the mixed solvent vapor is discharged from the condensate discharge port and recovered; A plurality of spacer plates are provided inside the cooling cylinder, and the spacer plates divide the internal space of the cooling cylinder into a plurality of interconnected steam flow channels; The two ends of the spacer plate are not connected to the two ends of the cooling cylinder, and there is a certain distance between them.

2. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: The steam lower opening at the lower end of the steam infusion port extends all the way to the bottom layer of steam flow channel; Except for the bottom layer of steam flow channel, the steam inlet is directly opposite to each layer of steam flow channel, and a steam side opening is opened on the side wall of the steam inlet.

3. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: The coolant inlet passes through the spacer plate, and the upper end opening of the coolant inlet extends all the way to the steam flow channel of the first uppermost layer; An annular cooling pipe is provided at the upper opening of the cooling liquid infusion port, and the annular cooling pipe is communicated with the cooling liquid infusion port; Except for the steam flow channels in the first layer and the bottom layer, an annular cooling pipe is provided on the side wall of the coolant inlet located in each layer of the steam flow channel, and the annular cooling pipe is communicated with the coolant inlet.

4. The cooling device for a mixed solvent separation and recovery system according to claim 3, characterized in that: The cooling liquid infusion port is located on the side wall of the cooling interlayer and an interlayer opening is opened; the cooling liquid flows into the cooling interlayer from the interlayer opening.

5. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A plurality of liquid seepage holes are provided on the surface of the spacer layer.

6. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A steam reflux port is provided on the cooling cylinder and on the opposite side of the steam infusion port; The lower end opening of the steam reflux port is communicated with the interior of the cooling cylinder; The upper end opening of the steam reflux port is communicated with the steam infusion port through a reflux pipe.

7. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: The bottom of the cooling cylinder is a sloped structure; The condensate discharge port is located at the upper end opening inside the cooling cylinder and is arranged at the lowest point of the slope-shaped structure.

8. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A plurality of ridges are arranged at equal intervals on the inner wall of the cooling cylinder; A guide groove is formed between two adjacent ridges.

9. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A drain port is provided below the cooling cylinder; The upper end opening of the drain port is communicated with the interior of the cooling cylinder, and the lower end opening of the drain port is located outside the cooling cylinder; A detachable sealing plug is provided in the drain port.

10. The cooling device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A pressure gauge is provided above the cooling cylinder; the pressure gauge is used to monitor the steam pressure in the cooling cylinder.

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