Rectifying tower steam recovery device

Abstract

The invention relates to the technical field of rectifying tower steam recovery, in particular to a rectifying tower steam recovery device which comprises a recovery tank, a recovery mechanism, a filtering mechanism and a heating mechanism, the recovery mechanism comprises two end plates, a partition plate, a first auxiliary assembly and a second auxiliary assembly, and the two end plates are arranged in the recovery tank; cooling pipes which are uniformly distributed are arranged between the two end plates, a plurality of spacing plates are arranged on the inner wall of the recovery tank, the plurality of spacing plates are positioned between the two end plates, the spacing plates are obtained by cutting fan-shaped parts of circular plates, the fan-shaped missing parts of two adjacent spacing plates are alternately arranged up and down, and the cooling pipes penetrate through holes formed in the adjacent spacing plates; the filtering mechanism is arranged between the water inlet pipe and the pipeline I; the heating mechanism is positioned on the outer side of the recovery tank. Cooling liquid in the heat exchange tubes is subjected to flowing laminar flow disturbance, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of distillation tower steam recovery, in particular to a distillation tower steam recovery device. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It utilizes the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, to transfer the light components (low boiling substances) in the liquid phase to the gas phase, and the heavy components (high boiling substances) in the gas phase to the liquid phase, thereby achieving the purpose of separation. During the use of the distillation tower, the steam at the top of the tower is liquefied through the steam recovery device, so that the liquid phase after the steam liquefaction is refluxed to the upper end of the device.

[0003] Patent document with publication number CN104771817A discloses a steam heat recovery device for a fatty acid distillation tower, comprising: a hot steam transmission pipeline, whose inlet is connected to the steam outlet of the fatty acid distillation tower; a hydrolysis tower water inlet pipeline; a heat exchanger, whose inlet is respectively connected to the hot steam transmission pipeline and the hydrolysis tower water inlet pipeline, and the outlet is respectively connected to the steam recovery pipeline and the hydrolysis tower water inlet; and a hydrolysis tower, whose outer surface has an insulation cavity, the steam inlet of the insulation cavity and the hot steam transmission pipeline are connected by a hot steam branch pipe, and the air outlet of the insulation cavity is connected to the steam recovery pipeline; wherein; the hydrolysis tower water inlet pipeline, the hot steam transmission pipeline and the hot steam branch pipe are respectively provided with a water inlet flow regulating valve, a hot steam flow regulating valve and an insulation steam flow regulating valve. The recovery device is equipped with a heat exchanger to use the steam from the fatty acid distillation tower to heat the water inlet to the hydrolysis tower, thereby achieving energy saving and consumption reduction. However, the heat exchange pipes in the heat exchanger are arranged uniformly in a ring shape, and the overall heat exchange component structure inside the heat exchanger is relatively simple, resulting in limited efficiency in recovering and cooling the steam from the distillation tower. Summary of the Invention

[0004] The present invention provides a distillation tower steam recovery device, which increases heat exchange efficiency by disturbing the laminar flow of cooling liquid in a heat exchange tube.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a distillation tower steam recovery device, comprising a recovery tank, a recovery mechanism, a filtering mechanism and a heating mechanism;

[0006] A feed pipe is provided through the upper left side of the recovery tank, a discharge pipe is provided through the lower right side of the recovery tank, a water inlet pipe is provided through the left end of the recovery tank, a pipe 1 is installed on the left end of the water inlet pipe, and a water outlet pipe is installed on the right end of the recovery tank;

[0007] The recovery mechanism includes end plates, spacer plates, auxiliary components 1 and 2. The end plates are two plates arranged in the recovery tank, and cooling pipes are evenly distributed between the two end plates. The spacer plates are multiple plates arranged on the inner wall of the recovery tank, and the multiple spacer plates are located between the two end plates. The spacer plates are obtained by cutting sector-shaped parts of circular plates. The sector-shaped missing parts of two adjacent spacer plates are arranged alternately up and down. The cooling pipes all pass through the holes opened in the adjacent spacer plates.

[0008] The filtering mechanism is arranged between the water inlet pipe and the pipe 1;

[0009] The heating mechanism is located outside the recovery tank.

[0010] Furthermore, an auxiliary component is provided in the cooling pipe, which includes a connecting seat. Multiple connecting seats are arranged side by side along the axis of the cooling pipe. The right side of the connecting seat is rotatably connected to a fan blade through a vertically adjacent rotating shaft. The spiral fan surfaces of two adjacent fan blades in the same cooling pipe are arranged in opposite directions.

[0011] Furthermore, an auxiliary component 2 is provided between the recovery tank and the discharge pipe, and the auxiliary component 2 includes a drain pipe and a guide seat. The drain pipes are evenly penetrated and arranged at the lower end of the inner wall of the recovery tank. The drain pipes are connected to the discharge pipe through a connecting pipe. The inner wall of the drain pipe is provided with a connecting seat 2 and a conical ring. The conical ring is located at the upper end of the adjacent connecting seat 2. The upper side of the connecting seat 2 is provided with a blocking seat through a telescopic column and a spring. The spring is sleeved on the outside of the telescopic column. The blocking seat is installed in cooperation with the center hole of the conical ring. The guide seats are evenly arranged at the lower end of the inner wall of the recovery tank. The guide seat is located between the drain pipes. The lower surface of the guide seat is arc-shaped. The thickness and width of the guide seat decrease successively from left to right. The left end of the guide seat is in contact with the partition plate, and the right end is located at the left edge of the drain pipe on the right side of the two adjacent drain pipes.

[0012] Furthermore, the filtering mechanism includes a filter shell, a pressure cover, a particulate filter plate and a limiting assembly. The filter shell is arranged between the water inlet pipe and pipe one. The pressure cover is sealed and assembled in the opening at the top of the filter shell. The particulate filter plate is inserted into the filter shell. The limiting assembly is used to press the pressure cover onto the filter shell.

[0013] Furthermore, the filtering mechanism also includes a rubber sealing ring, which is arranged around the gland and at the opening at the top of the filter shell. When the gland is assembled on the opening at the top of the filter shell, the rubber sealing ring on the gland is located below the rubber sealing ring at the opening at the top of the filter shell.

[0014] Furthermore, the limiting assembly includes a fixed shaft and a limiting seat. The fixed shaft is assembled at the upper end of the filter shell. The outer lower end of the fixed shaft is rotatably connected to the base through a bearing. A pressure plate is provided on the side of the base. The pressure plate corresponds to the position of the particulate filter plate. The outer end of the fixed shaft is movably sleeved with a torsion spring. The upper end of the torsion spring is fixedly connected to the disc at the upper end of the fixed shaft, and the lower end of the torsion spring is fixedly connected to the base. The limiting seat is located on one side of the base.

[0015] Furthermore, the heating mechanism includes a circular tube and a heating tube. The left end of the heating tube is connected to the right end of the water outlet pipe through pipe 2. A part of the heated water in the water outlet pipe enters the heating tube through pipe 2. The heat of the heated water is transferred between the heating tube and the circular tube. A spiral groove is provided on the outer side of the circular tube, and the heating tube is installed in the spiral groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The distillation tower steam recovery device disclosed in the present invention utilizes the water pressure on the fan surface through auxiliary component one to drive the water body in the corresponding part to rotate, thereby disrupting the laminar flow of the cooling liquid in the heat exchange tube, utilizing the partition plate to increase the recovery and liquefaction path of the distillation tower steam, and utilizing auxiliary component two to utilize the pressure difference between the liquid and the spring on the sealing seat, thereby self-controlling the opening and closing of the pipeline, and then timely collecting and discharging the liquefied distillation tower steam in the device, avoiding that part of the liquid continues to be heated by the distillation tower steam and vaporizing, and effectively improving the recovery and cooling efficiency of the device for the distillation tower steam.

[0018] 2. The distillation tower steam recovery device disclosed in the present invention filters scale in the cooling liquid through a filter element to avoid scale adhesion in the heat exchange pipe, further improving the device's recovery and cooling efficiency of the distillation tower steam, and can timely detect the impurity concentration in the cooling liquid through the detection element, and quickly replace the filter element through the elastic element according to the detection result, avoiding a decrease in the distillation tower steam recovery and cooling efficiency of the device due to a decrease in the filtering effect of the filter element on scale.

[0019] 3. The distillation tower steam recovery device disclosed in the present invention, through the cooperation of pipeline components, utilizes heat transfer to transfer part of the heat generated in the distillation tower steam recovery process to act on the preheating treatment of the reboiled liquid in the liquid inlet pipe of the reboiler of the external distillation tower, thereby improving the subsequent reboil rate of the reboiled liquid in the external reboiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the distillation tower steam recovery device in the embodiment;

[0021] Figure 2 is a cross-sectional view of an embodiment recovery tank;

[0022] Figure 3 This is a structural diagram of the arrangement of multiple spacer plates in an embodiment;

[0023] Figure 4 It is a structural schematic diagram of the guide seat in the embodiment;

[0024] Figure 5 It is a structural diagram of the filtering mechanism of the embodiment;

[0025] Figure 6 It is a structural schematic diagram of the circular tube of the embodiment;

[0026] Figure 7 for Figure 2 Enlarged view of the area marked A;

[0027] Figure 8 for Figure 2 Enlarged view of the area marked B;

[0028] Figure 9 for Figure 5 Enlarged view of the area marked C.

[0029] In the figure: 10-recovery tank, 11-feed pipe, 12-discharge pipe, 13-water inlet pipe, 14-pipeline 1, 15-water outlet pipe, 16-solenoid valve, 17-liquid monitor.

[0030] 21-end plate, 22-partition plate, 23-cooling pipe, 241-connecting seat 1, 242-rotating shaft 1, 243-fan blade, 251-drain pipe, 252-guide seat, 253-connecting pipe, 254-connecting seat 2, 255-conical ring, 256-telescopic column, 257-spring, 258-blocking seat.

[0031] 31-filter housing, 32-pressure cover, 321-handle, 33-particulate filter plate, 331-finger buckle groove, 34-rubber sealing ring, 351-fixed shaft, 352-limiting seat, 353-base, 354-pressure plate, 355-torsion spring.

[0032] 41-round pipe, 42-heating pipe, 43-pipe 2. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 1-9, this embodiment provides a distillation tower steam recovery device, including a recovery tank 10, a recovery mechanism, a filtering mechanism and a heating mechanism.

[0035] A feed pipe 11 is provided on the upper left side of the recovery tank 10, a discharge pipe 12 is provided on the lower right side of the recovery tank 10, a water inlet pipe 13 is provided on the left end of the recovery tank 10, a pipe 14 is installed on the left end of the water inlet pipe 13, and a water outlet pipe 15 is installed on the right end of the recovery tank 10. Solenoid valves 16 are provided on the water inlet pipe 13, pipe 14 and water outlet pipe 15, and liquid monitors 17 are evenly distributed on the left end of the inner wall of the water outlet pipe 15.

[0036] The recovery mechanism includes end plates 21, spacers 22, auxiliary components 1 and 2. The end plates 21 are two plates installed in the recovery tank 10, with evenly distributed cooling pipes 23 between them. The spacers 22 are multiple plates installed on the inner wall of the recovery tank 10, with multiple spacers 22 located between the two end plates 21. The spacers 22 are obtained by cutting sector-shaped sections from circular plates, with the missing sector-shaped sections of two adjacent spacers 22 arranged alternately up and down. The cooling pipes 23 all pass through the holes opened in the adjacent spacers 22. The two end plates 21 and the inner arc wall of the recovery tank 10 form cavity 1, while cavity 2 forms between the end plates 21 and adjacent spacers 22, as well as between two adjacent spacers 22.

[0037] Auxiliary component 1 is located in the cooling tube 23, and includes a connecting seat 1 241. A plurality of connecting seats 241 are arranged side by side along the axis of the cooling tube 23. The right side of the connecting seat 1 241 is rotatably connected to the fan blade 243 through the vertically adjacent rotating shaft 1 242.

[0038] As a preferred solution of this embodiment, the spiral fan surfaces of two adjacent blades 243 in the same cooling tube 23 are arranged in opposite directions.

[0039] The auxiliary component 2 is located between the recovery tank 10 and the discharge pipe 12. The auxiliary component 2 includes a drain pipe 251 and a guide seat 252. The number of drain pipes 251 is half of the number of cavity 2. Two adjacent cavities 2 are provided with a drain pipe 251. The drain pipes 251 are uniformly arranged at the lower end of the inner wall of the recovery tank 10. The drain pipes 251 are connected to the discharge pipe 12 through a connecting pipe 253. The inner wall of the drain pipe 251 is provided with a connecting seat 254 and a conical ring 255. The conical ring 255 is located at the upper end of the adjacent connecting seat 254. The upper side of the connecting seat 254 is provided with a connecting seat 254. A sealing seat 258 is provided through a telescopic column 256 and a spring 257. The spring 257 is sleeved on the outside of the telescopic column 256. The sealing seat 258 is installed in conjunction with the center hole of the tapered ring 255. The guide seats 252 are evenly arranged on the lower end of the inner wall of the recovery tank 10. The guide seat 252 is located between the drainage pipes 251. The lower surface of the guide seat 252 is an arc-shaped design. The thickness and width of the guide seat 252 decrease successively from left to right. The left end of the guide seat 252 is in contact with the partition plate 22, and the right end is located at the left edge of the drainage pipe 251 on the right side of the two adjacent drainage pipes 251.

[0040] The filtration mechanism includes a filter housing 31, a gland 32, a particle filter plate 33 and a limiting assembly. The filter housing 31 is arranged between the water inlet pipe 13 and the pipe 14. The gland 32 is sealed and assembled in the opening at the top of the filter housing 31. The particle filter plate 33 is inserted into the filter housing 31. The limiting assembly is used to press the gland 32 onto the filter housing 31.

[0041] As a preferred solution of this embodiment, a handle 321 is provided on the top of the pressure cover 32 , and a finger lock groove 331 is provided on the top of the particle filter plate 33 .

[0042] The filtering mechanism also includes a rubber sealing ring 34, which is arranged around the pressure cover 32 and at the opening at the top of the filter shell 31. When the pressure cover 32 is assembled on the opening at the top of the filter shell 31, the rubber sealing ring 34 on the pressure cover 32 is located below the rubber sealing ring 34 at the opening at the top of the filter shell 31.

[0043] The limiting assembly includes a fixed shaft 351 and a limiting seat 352. The fixed shaft 351 is assembled on the upper end of the filter shell 31. The outer lower end of the fixed shaft 351 is rotatably connected to the base 353 through a bearing. A pressure plate 354 is provided on the side of the base 353. The pressure plate 354 corresponds to the position of the particulate filter plate 33. The outer end of the fixed shaft 351 is movably sleeved with a torsion spring 355. The upper end of the torsion spring 355 is fixedly connected to the disc at the upper end of the fixed shaft 351, and the lower end of the torsion spring 355 is fixedly connected to the base 353. The limiting seat 352 is located on one side of the base 353.

[0044] The heating mechanism is located on the outside of the recovery tank 10. The heating mechanism includes a circular tube 41 and a heating tube 42. The left end of the heating tube 42 is connected to the right end of the outlet pipe 15 through the second pipe 43. A part of the heated water in the outlet pipe 15 enters the heating tube 42 through the second pipe 43. The heat of the heated water is transferred between the heating tube 42 and the circular tube 41. A spiral groove is provided on the outside of the circular tube 41, and the heating tube 42 is installed in the spiral groove.

[0045] The working principle of the distillation tower steam recovery device provided by the present invention is as follows:

[0046] First, the feed pipe 11 is connected to the steam at the top of the distillation tower through an external pipeline, and the discharge pipe 12 is connected to the steam cooling reflux port of the distillation tower through an external pipeline. Then the circular tube 41 is connected in series between the reboiler of the distillation tower and the recovery tank. The left end of the pipe 14 is connected to the external cooling liquid, and the right end of the water outlet pipe 15 and the right end of the heating pipe 42 are connected to the factory's domestic water pipeline.

[0047] When the steam at the top of the distillation tower is recovered and cooled, the cooling liquid enters the recovery tank 10 through the pipe 14 and flows from left to right along the multiple cooling pipes 23. At the same time, the steam at the top of the distillation tower enters the recovery tank 10 through the feed pipe 11. The cooling liquid in the cooling pipe 23 exchanges heat with the steam from the distillation tower. The partition plate 22 in the device cooperates with the wall of the recovery tank 10 and the cooling pipe 23 to form a vertical steam path diagram that fluctuates from left to right (as shown in FIG. Figure 3 The cooling liquid in the cooling tube 23 is moved from left to right by the cooling liquid, and the cooling liquid is squeezed and contacted with the fan surface of the fan blade 243 by the water flow, and the fan blade 243 is squeezed and contacted around the corresponding rotating shaft 242 by the water flow. The cooling liquid in the cooling tube 23 is disturbed during the unidirectional rotation of the fan blade 243, and the laminar flow state of the cooling liquid in the cooling tube 23 is broken, so that the cooling liquid in the center of the cooling tube 23 can move to the part close to the wall of the cooling tube 23 through the flow, and the cooling liquid in the center of the cooling tube 23 can also absorb the heat of the distillation tower steam through the wall of the cooling tube 23, thereby improving the heat exchange efficiency of the cooling liquid to the distillation tower steam in the cavity.

[0048] At the same time, since the spiral fan surfaces of the two horizontally adjacent fan blades 243 in the cooling tube 23 are opposite, when the cooling liquid passing through one fan blade 243 rotates in a certain direction, when the cooling liquid passes through the next fan blade 243, the cooling liquid at this part rotates in the opposite direction due to the opposite influence of the spiral fan surface, thereby causing the cooling liquid in the cooling tube 23 to rotate alternately in forward and reverse directions during the process of moving from left to right, further improving the heat absorption effect of the cooling liquid on the distillation tower steam in the cavity one, and at the same time releasing the heat of the distillation tower steam passing through each cavity two. The steam liquefied liquid of the distillation tower falls along the two walls of the corresponding cavity and flows from left to right along the slope of the guide seat 252 laid at the bottom of the cavity to the corresponding discharge pipe 251 or the discharge pipe 12. The steam liquefied liquid of the distillation tower in the discharge pipe 251 continuously gathers above the blocking seat 258 and the conical ring 255. The steam liquefied liquid of the distillation tower applies a vertical downward pressure to the blocking seat 258. When the pressure overcomes the vertical upward compressive elastic force applied by the spring 257 to the blocking seat 258 (the spring 257 The sealing seat 258 is always in a compressed state), and the sealing seat 258 moves vertically downward relative to the vertically adjacent conical ring 255, thereby releasing the elastic sealing of the sealing seat 258 on the conical ring 255, and the distillation tower vapor liquefied liquid in the discharge pipe 251 passes through the conical ring 255 and flows into the discharge pipe 12 via the discharge pipe 251 and the connecting pipe 253. When the distillation tower vapor liquefied liquid above the sealing seat 258 and the conical ring 255 is discharged to the distillation tower vapor liquefied liquid, the downward pressure exerted by the sealing seat 258 by the sealing seat 258 is less than the upward elastic pressure exerted by the spring 257 on the sealing seat 258. Force type, the sealing seat 258 seals the conical ring 255 again, and the sealing between the two prevents the distillation tower steam in the cavity two from entering the discharge pipe 12 through the gap. At the same time, the liquid after the distillation tower steam accumulated in the cavity two is liquefied is discharged in time through the auxiliary component two, thereby preventing the distillation tower steam liquefied liquid from being heated by the distillation tower steam again and continuing to vaporize due to being stored in the cavity two for a long time, thereby indirectly improving the cooling and recovery efficiency of the device for the distillation tower steam, and the cooling liquid in the cooling pipe 23 absorbs heat and is discharged to the water outlet pipe 15.

[0049] A portion of the heated water in the outlet pipe 15 enters the heating pipe 42 through the pipe 2 43. Through the heat transfer between the heating pipe 42 and the circular pipe 41, the reboiled liquid in the liquid inlet pipe of the reboiler of the external distillation tower is preheated to improve its subsequent reboiling rate. The other portion of the heated water and the heated water after use are supplied to the factory through the external factory domestic water pipe for domestic hot water supply, so that the heat generated in the steam liquefaction process of the distillation tower is reasonably utilized and resources are saved. The cooling pipe 23, the circular pipe 41 and the pipe 2 43 can all be made of copper metal to improve the heat transfer effect between the pipe bodies.

[0050] The cooling liquid entering the water inlet pipe 13 uses the adsorption capacity of activated carbon through the particle filter plate 33 to filter out scale impurities in the cooling liquid, thereby preventing scale in the water from adhering to the wall of the cooling pipe 23 and reducing the heat transfer effect of the cooling pipe 23.

[0051] Replacement operation of the particulate filter plate 33: First, the staff rotates the base 353 forward around the axis of the fixed shaft 351, releases the pressure limit on the pressure cover 32, and pulls the particulate filter plate 33 out of the pressure cover 32. During this process, the upper end of the torsion spring 355 increases the torque as the base 353 rotates. After replacing the new particulate filter plate 33, the pressure cover 32 is re-covered and the base 353 is released. The base 353 resets the torque through the torsion spring 355 and rotates again around the axis of the fixed shaft 351 to the top of the pressure cover 32, thereby vertically limiting the installation of the pressure cover 32, and at the same time, the reset and flipping stroke of the base 353 is laterally limited by the limit seat 352.

[0052] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steam recovery device for a distillation tower, comprising a recovery tank, a recovery mechanism, a filtering mechanism, and a heating mechanism, characterized in that: A feed pipe is provided through the upper left side of the recovery tank, a discharge pipe is provided through the lower right side of the recovery tank, a water inlet pipe is provided through the left end of the recovery tank, a pipe 1 is installed on the left end of the water inlet pipe, and a water outlet pipe is installed on the right end of the recovery tank; The recovery mechanism includes end plates, spacer plates, auxiliary components 1 and 2. The end plates are two plates arranged in the recovery tank, and cooling pipes are evenly distributed between the two end plates. The spacer plates are multiple plates arranged on the inner wall of the recovery tank, and the multiple spacer plates are located between the two end plates. The spacer plates are obtained by cutting sector-shaped parts of circular plates. The sector-shaped missing parts of two adjacent spacer plates are arranged alternately up and down. The cooling pipes all pass through the holes opened in the adjacent spacer plates. The filtering mechanism is arranged between the water inlet pipe and the pipe 1; The heating mechanism is located outside the recovery tank.

2. The distillation tower steam recovery device according to claim 1, characterized in that: An auxiliary component is set in the cooling pipe, which includes a connecting seat. Multiple connecting seats are arranged side by side along the axis of the cooling pipe. The right side of the connecting seat is rotatably connected to a fan blade through a vertically adjacent rotating shaft. The spiral fan surfaces of two adjacent fan blades in the same cooling pipe are arranged in opposite directions.

3. The distillation tower steam recovery device according to claim 1, characterized in that: An auxiliary component 2 is set between the recovery tank and the discharge pipe. The auxiliary component 2 includes a drain pipe and a guide seat. The drain pipes are evenly penetrated and arranged at the lower end of the inner wall of the recovery tank. The drain pipes are connected to the discharge pipe through connecting pipes. The inner walls of the drain pipes are provided with a connecting seat 2 and a conical ring. The conical rings are located at the upper ends of adjacent connecting seats 2. The upper sides of the connecting seats 2 are provided with sealing seats through telescopic columns and springs. The spring sleeve is arranged on the outside of the telescopic column. The sealing seats are installed in cooperation with the center holes of the conical rings. The guide seats are evenly arranged at the lower end of the inner wall of the recovery tank. The guide seats are located between the drain pipes. The lower surface of the guide seat is arc-shaped. The thickness and width of the guide seat decrease successively from left to right. The left end of the guide seat is in contact with the partition plate, and the right end is located at the left edge of the drain pipe on the right side of the two adjacent drain pipes.

4. The distillation tower steam recovery device according to claim 1, characterized in that: The filtration mechanism includes a filter shell, a gland, a particle filter plate and a limit assembly. The filter shell is arranged between the water inlet pipe and pipe one. The gland is sealed and assembled in the opening at the top of the filter shell. The particle filter plate is inserted into the filter shell. The limit assembly is used to press the gland onto the filter shell.

5. The distillation tower steam recovery device according to claim 4, characterized in that: A handle is provided on the top of the pressure cover, and a finger buckle groove is provided on the top of the particle filter plate.

6. The distillation tower steam recovery device according to claim 4, characterized in that: The filter mechanism also includes a rubber sealing ring, which is arranged around the gland and at the opening at the top of the filter shell. When the gland is assembled on the opening at the top of the filter shell, the rubber sealing ring on the gland is located below the rubber sealing ring at the opening at the top of the filter shell.

7. The distillation tower steam recovery device according to claim 4, characterized in that: The limiting assembly includes a fixed shaft and a limiting seat. The fixed shaft is assembled at the upper end of the filter shell. The outer lower end of the fixed shaft is rotatably connected to the base through a bearing. A pressure plate is provided on the side of the base. The pressure plate corresponds to the position of the particulate filter plate. The outer end of the fixed shaft is movably sleeved with a torsion spring. The upper end of the torsion spring is fixedly connected to the disc at the upper end of the fixed shaft, and the lower end of the torsion spring is fixedly connected to the base. The limiting seat is located on one side of the base.

8. The distillation tower steam recovery device according to claim 1, characterized in that: The heating mechanism includes a circular tube and a heating tube. The left end of the heating tube is connected to the right end of the water outlet pipe through pipe 2. A part of the heated water in the water outlet pipe enters the heating tube through pipe 2. The heat is transferred between the heating tube and the circular tube by the heated water. A spiral groove is provided on the outside of the circular tube, and the heating tube is installed in the spiral groove.

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