Environment-friendly efficient rectification device

Abstract

The utility model relates to the technical field of distillation devices, in particular to an environment-friendly efficient rectification device which comprises a tower body, the top of the tower body is connected with a condenser and a return tank through a first pipeline, the bottom of the tower body is connected with a reboiler through a second pipeline, and an expandable sealing piece is arranged at the joint of the second pipeline and used for blocking a gap at the joint. The sealing piece comprises an expandable sealing ring and two flange pieces which are connected with each other, the sealing ring is arranged between the two flange pieces, an annular cavity is formed in the sealing ring, the annular cavity is filled with gaseous media which expand when heated, and annular positioning grooves are correspondingly formed in the opposite faces of the two flange pieces. According to the environment-friendly efficient rectification device, the sealing rings in the flanges are heated by utilizing heat energy of circulating steam in the pipelines, so that a gaseous medium in the cavity of each sealing ring is heated to expand until a gap between the two flange sheets is filled, the sealing performance of the joint of the second pipeline between the tower body and the reboiler can be effectively improved, and pollution caused by steam leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation devices, in particular to an environmentally friendly and efficient distillation device. Background Art

[0002] Distillation is a separation process that uses the different volatilities of the components in a mixture to separate each other. Commonly used equipment includes plate distillation towers and packed distillation towers. The gas and liquid phases are in countercurrent contact to carry out interphase heat and mass transfer.

[0003] In pharmaceutical and fine chemical production, the sealing performance of distillation equipment is crucial to the entire distillation process. This is especially true at the piping connections between key equipment, such as distillation towers and reboilers. Poor sealing can easily lead to steam leaks, which can contain harmful substances and be directly released into the air, polluting the atmosphere. Utility Model Content

[0004] In order to solve the problem that the pipe connections of the existing distillation device are poorly sealed and easily cause steam leakage to pollute the environment, the utility model provides an environmentally friendly and efficient distillation device. By arranging an expandable seal at the pipe connection, the seal seals the gap after expansion, thereby improving the sealing performance.

[0005] The utility model provides an environmentally friendly, high-efficiency distillation device, comprising a tower body, the top of which is connected to a condenser and a reflux tank via a first pipe, and the bottom of which is connected to a reboiler via a second pipe. An expandable seal is provided at the connection of the second pipe to seal the gap at the connection. Steam is used to heat the seal to expand, effectively sealing the connection.

[0006] Furthermore, the sealing element comprises an expandable sealing ring and two mutually connected flanges, wherein the sealing ring is arranged between the two flanges and the expanded sealing ring is clamped between the two flanges.

[0007] Furthermore, an annular cavity is provided inside the sealing ring, and the annular cavity is filled with a gaseous medium that expands when heated. The gaseous medium can expand when heated.

[0008] Furthermore, the gaseous medium is any one of hydrogen, helium and ammonia, which can be selected according to needs and has good thermal expansion effect.

[0009] Furthermore, annular positioning grooves are correspondingly formed on the opposite surfaces of the two flanges, and the sealing rings are placed in the annular positioning grooves to position the sealing rings.

[0010] Furthermore, the annular positioning groove is provided with a plurality of grooves on its wall, the grooves being connected to the annular positioning groove, and the outer periphery of the sealing ring placed in the annular positioning groove forms a contoured portion. The cooperation between the grooves on the inner wall of the annular positioning groove and the contoured portion on the outer surface of the sealing ring further improves the sealing performance.

[0011] Furthermore, an annular heat conducting sheet is disposed within the annular cavity, and a heat conducting ring is disposed in the middle of the flange. The annular heat conducting sheet is connected to the heat conducting ring via a heat conducting connecting plate. There are at least three heat conducting connecting plates, which are evenly spaced around the circumference. Steam flowing through the pipeline heats the heat conducting ring, which then transfers heat energy to the annular heat conducting sheet via the heat conducting connecting plate, thereby better heating the gaseous medium within the sealing ring.

[0012] Furthermore, an annular heating wire is installed in the annular cavity. The annular heating wire is fixed to the annular heat conducting plate and electrically connected to a heater located outside the flange via a wire. During initial startup of the distillation unit, the heater heats the gaseous medium in the annular cavity to achieve sealing.

[0013] The beneficial effects of the present invention are:

[0014] The utility model provides an environmentally friendly and efficient distillation device, which utilizes the thermal energy of the steam circulating in the pipeline to heat the sealing ring in the flange, so that the gaseous medium in the sealing ring cavity is heated and expanded to fill the gap between the two flanges, which can effectively improve the sealing performance of the second pipeline connection between the tower body and the reboiler, and prevent pollution caused by steam leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0016] Figure 1 It is a structural diagram of the distillation unit;

[0017] Figure 2 This is the external structure diagram of the seal;

[0018] Figure 3 This is a diagram of the internal structure of the seal;

[0019] Figure 4 This is an exploded view of the seal;

[0020] Figure 5 It is the matching diagram of the profiling part and the groove;

[0021] In the figure, 1. tower body, 2. condenser, 3. reflux tank, 4. reboiler, 5. sealing ring, 6. flange, 7. annular cavity, 8. annular positioning groove, 81. groove, 9. annular heat conducting plate, 10. heat conducting ring, 11. heat conducting connecting plate, 12. annular heating wire, 13. heater. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In order to improve the sealing of pipeline joints to avoid steam leakage, an environmentally friendly and efficient distillation device is designed, such as Figure 1 As shown, the tower body 1 includes a tower body 1, the top of the tower body 1 is connected to the condenser 2 and the reflux tank 3 through a first pipe, and the bottom of the tower body 1 is connected to the reboiler 4 through a second pipe. This part is a mature existing technology and has been disclosed in detail in the patent with authorization announcement number CN104667554B. It will not be described in detail in this technical solution.

[0024] like Figure 2 and 3 As shown, the core of this technical solution is that an expandable seal is provided at the connection of the second pipeline to seal the gap at the connection. That is, the connection between the second pipeline and the second pipeline is connected by a seal, the connection between the tower body 1 and the second pipeline is connected by a seal, and the connection between the reboiler 4 and the second pipeline is connected by a seal.

[0025] The seal includes an expandable sealing ring 5 and two mutually connected flanges 6, which can be fixed by screw connection. The flanges 6 are fixedly connected to the tower body 1, the reboiler 4 or the second pipeline. The sealing ring 5 is arranged between the two flanges 6. When the two flanges 6 are fixed to each other, the sealing ring 5 can be clamped between the two flanges 6, and the gap between the two flanges 5 can be sealed by the sealing ring 5.

[0026] An annular cavity 7 is provided within the sealing ring 5. This cavity is filled with a gaseous medium that expands upon heating, preferably any of hydrogen, helium, and ammonia. Steam heated by the reboiler 4 enters the tower body 1 through the second pipe. During its flow, the heat energy in the steam heats the gaseous medium within the annular cavity 7, causing it to expand and pressurize the sealing ring 5 outward, causing it to expand and extend toward the two flanges 6. This further enhances the sealing performance of the sealing ring 5 and the sealing of the second pipe connection.

[0027] like Figure 4 and 5As shown, annular positioning grooves 8 are correspondingly provided on the opposing surfaces of the two flanges 6, and the sealing ring 5 is placed in the annular positioning grooves 8. The groove walls of the annular positioning grooves 8 are further provided with a plurality of grooves 81, which are in communication with the annular positioning grooves 8. A contoured portion 51 is formed on the periphery of the sealing ring 5 placed in the annular positioning grooves 8. The annular positioning grooves 8 can be used to position the sealing ring 5, and the inner walls of the annular positioning grooves 8 can be provided with grooves 81. When the sealing ring 5 expands, the contoured portion 51 is formed at the portion where the sealing ring 5 and the flange 6 are in contact, under the shape limitation of the grooves 81. The cooperation between the contoured portion 51 and the grooves 81 can further improve the sealing performance between the flange 6 and the sealing ring 5. Compared with directly installing the prefabricated contoured portion 51 in the grooves 81, the expansion of the sealing ring 5 allows the sealing ring 5 to form the contoured portion 51 located in the grooves 81, which makes it easier to complete the installation of the sealing ring 5.

[0028] To better heat the sealing ring 5, an annular heat conducting sheet 9 is installed within the annular cavity 7. A heat conducting ring 10 is located in the center of the flange 6. The annular heat conducting sheet 9 is connected to the heat conducting ring 10 via a heat conducting connecting plate 11. There are at least three heat conducting connecting plates 11, which are evenly spaced around the circumference. The annular heat conducting sheet 9, heat conducting connecting plates 11, and heat conducting ring 10 are preferably made of copper. When steam flows within the seal, it heats the heat conducting ring 10. The heat conducting ring 10 then transfers the heat energy to the annular heat conducting sheet 9 through the heat conducting connecting plates 11, effectively heating the gaseous medium within the annular cavity 7.

[0029] To enable autonomous heating of the annular cavity 7, an annular heating wire 12 is provided within the annular cavity 7. The annular heating wire 12 is electrically connected via a wire to a heater 13 disposed on the exterior of the flange 6. Upon initial startup of the high-efficiency distillation unit, heater 13 can be activated to heat the gaseous medium within the annular cavity 7.

[0030] This technical solution uses the thermal energy of steam to heat the gaseous medium inside the sealing ring 5, so that the sealing ring 5 expands to fill the gap between the two flanges 6, which can effectively improve the sealing performance of the second pipe connection between the tower body 1 and the reboiler 4.

[0031] The above description is only illustrative and not restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all of them will fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly and efficient distillation device, comprising a tower body (1), wherein the top of the tower body (1) is connected to a condenser (2) and a reflux tank (3) via a first pipeline, and the bottom of the tower body (1) is connected to a reboiler (4) via a second pipeline, characterized in that: An expandable seal is provided at the connection of the second pipe to seal the gap at the connection.

2. An environmentally friendly and efficient distillation device according to claim 1, characterized in that: The sealing member comprises an expandable sealing ring (5) and two flanges (6) connected to each other, wherein the sealing ring (5) is arranged between the two flanges (6).

3. An environmentally friendly and efficient distillation device according to claim 2, characterized in that: An annular cavity (7) is provided inside the sealing ring (5), and the annular cavity (7) is filled with a gaseous medium that expands due to heat.

4. An environmentally friendly and efficient distillation device according to claim 3, characterized in that: The gaseous medium is any one of hydrogen, helium and ammonia.

5. The environmentally friendly and efficient distillation device according to claim 2, characterized in that: Annular positioning grooves (8) are correspondingly provided on the opposite surfaces of the two flanges (6), and the sealing ring (5) is placed in the annular positioning grooves (8).

6. The environmentally friendly and efficient distillation device according to claim 5, characterized in that: A plurality of grooves (81) are further provided on the groove wall of the annular positioning groove (8), and the plurality of grooves (81) are communicated with the annular positioning groove (8). The outer periphery of the sealing ring (5) placed in the annular positioning groove (8) forms a contoured portion (51).

7. The environmentally friendly and efficient distillation device according to claim 3, characterized in that: An annular heat conducting plate (9) is provided in the annular cavity (7), a heat conducting ring (10) is provided in the middle of the flange (6), the annular heat conducting plate (9) is connected to the heat conducting ring (10) via a heat conducting connecting plate (11), and at least three heat conducting connecting plates (11) are provided and are evenly distributed in the circumferential direction.

8. The environmentally friendly and efficient distillation device according to claim 7, characterized in that: An annular heating wire (12) is also provided in the annular cavity (7), and the annular heating wire (12) is electrically connected to a heater (13) provided outside the flange (6) via a wire.

Images