Liquid inlet pipe structure of rectifying tower

Abstract

The utility model belongs to the technical field of rectifying towers, and particularly relates to a liquid inlet pipe structure of a rectifying tower, which comprises a tower body and a liquid inlet pipe, the tower top is provided with a gas outlet, the tower bottom is provided with a liquid outlet, and the side surface is provided with a reflux inlet; the liquid inlet pipe is mounted on the side surface in the tower and comprises an outer pipe joint and a liquid inlet inner pipe; wherein the liquid inlet inner pipe comprises an inner layer and an outer layer, and the inner layer and the outer layer are both communicated with the outer pipe joint; the liquid inlet pipe is arranged to be of a double-layer structure comprising the inner layer and the outer layer, and the inner layer and the outer layer are both communicated with the outer pipe connector, so that when liquid enters through the liquid inlet pipe, the inner layer and the outer layer are both filled with liquid, when the liquid inlet pipe is in a high-temperature steam environment, the outer layer is heated, and the liquid in the outer layer absorbs heat and is vaporized; the influence of high-temperature steam on the inner layer can be relieved, the efficiency of feeding liquid from the inner layer is guaranteed, and the liquid feeding stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of distillation towers, and in particular relates to a liquid inlet pipe structure of a distillation tower. Background Art

[0002] As a separation equipment widely used in chemical, petroleum, pharmaceutical and food industries, the core function of distillation tower is to utilize the difference in volatility of each component in the mixture to achieve effective separation and purification of the mixture through countercurrent contact and mass transfer between the gas and liquid phases. During the operation of the distillation tower, the liquid inlet pipe serves as an important channel connecting the external material source with the tower. In actual operation, the liquid inlet pipe of the distillation tower is easily affected by the rising steam and faces a series of challenges.

[0003] Specifically, when the bottom reboiler heats the mixture to generate steam, the steam rises rapidly in the tower and exchanges heat with the air around the liquid inlet pipe and the tower wall. Since the liquid inlet pipe is directly exposed to the high-temperature steam environment, and part of the steam may directly impact or bypass the tower plate to contact the liquid inlet pipe, the temperature of the liquid inlet pipe increases significantly. When the temperature of the liquid inlet pipe exceeds the boiling point of the liquid material inside it, vaporization will occur. This phenomenon not only changes the physical state of the fluid in the liquid inlet pipe, but also causes the formation of gas-liquid two-phase flow in the liquid inlet pipe, which is easy to affect the outflow efficiency and stability of the liquid in the liquid inlet pipe, and thus affects the distillation, which needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid inlet pipe structure for a distillation tower in order to solve the above-mentioned technical problems, so as to avoid the liquid inlet pipe being exposed to the high-temperature steam environment in the tower body and being heated, thereby affecting the liquid outflow efficiency and stability.

[0005] In view of this, the utility model provides a liquid inlet pipe structure of a distillation tower, comprising:

[0006] The tower body has a gas outlet at the top, a liquid outlet at the bottom, and a reflux outlet at the side;

[0007] The liquid inlet pipe is installed on the side of the middle section of the tower body and includes an outer pipe joint and an inner liquid inlet pipe;

[0008] The liquid inlet inner tube comprises an inner layer and an outer layer, and both the inner layer and the outer layer are connected to the outer tube joint.

[0009] In the above technical solution, further:

[0010] The inner layer is provided with a plurality of threaded holes, and the outer layer is provided with a plurality of first circular holes coaxially arranged with the threaded holes;

[0011] Among them, nozzles are installed on the multiple threaded holes, and the multiple nozzles respectively pass through the multiple first circular holes and extend to the outer surface.

[0012] In the above technical solution, further:

[0013] A plurality of spray heads are arranged in two rows at equal intervals, and the two rows of spray heads are respectively inclined towards the inner wall of the tower body.

[0014] In the above technical solution, further:

[0015] A plurality of second round holes are also opened on the outer layer.

[0016] In the above technical solution, further:

[0017] A plurality of second round holes are vertically opened towards the top of the tower body.

[0018] In the above technical solution, further, it further includes:

[0019] Support blocks, which are installed between the inner layer and the outer layer and are used for the fixed connection between the inner layer and the outer layer.

[0020] In the above technical solution, further:

[0021] The inner liquid inlet pipe is detachably connected to the outer pipe joint, and a flange end is opened at one end of the inner liquid inlet pipe close to the outer pipe joint. The outer pipe joint is provided with a connecting portion at the inner wall of the tower body, and an installation hole is opened in the connecting portion.

[0022] The beneficial effects of the present utility model are as follows:

[0023] 1. By setting the liquid inlet pipe into a double-layer structure of an inner layer and an outer layer, and both the inner layer and the outer layer are communicated with the outer pipe joint, when liquid is introduced through the liquid inlet pipe, both the inner layer and the outer layer are filled with liquid. When the liquid inlet pipe is in a high-temperature steam environment, the outer layer is heated, and the liquid therein absorbs heat and vaporizes, which can slow down the influence of the high-temperature steam on the inner layer, ensure the efficiency of liquid inlet from the inner layer, and improve the stability of liquid inlet.

[0024] 2. By opening a plurality of threaded holes in the inner layer and a plurality of first round holes coaxial with them in the outer layer, a plurality of spray heads can be installed on the plurality of threaded holes in the inner layer, and the spray heads can extend through the plurality of first round holes to the surface of the liquid inlet pipe, thereby effectively ensuring the uniformity and stability of the liquid inlet of the liquid inlet pipe and improving the liquid inlet efficiency.

[0025] 3. By opening a plurality of second round holes on the outer layer, the gas formed by the vaporization of the liquid in the outer layer after being heated can flow out from the second round holes, and then new liquid is replenished in the outer layer, which can prevent the temperature of the outer layer from being too high and conducting heat to the inner layer, and has a good heat insulation effect on the inner layer.

[0026] 4. And initially, the second round hole can also serve as the liquid outlet, further ensuring the liquid inlet efficiency and uniformity. The vaporized gas flows out from the second round hole and rises together with the steam in the tower, which can effectively avoid waste of this part of heat, effectively improve the thermal efficiency of the steam, reduce heat loss, and the opening facing vertically towards the top of the tower can ensure the stability and uniformity of the rising steam, making up for the part of the steam blocked at the liquid inlet pipe in the tower. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the present utility model;

[0028] Figure 2 is a top view of the present utility model;

[0029] Figure 3 is the present utility model Figure 2 a cross-sectional view taken along line A-A in;

[0030] Figure 4 is the present utility model Figure 3 an enlarged view at B in;

[0031] Figure 5 is a cross-sectional view of the liquid inlet pipe of the present utility model;

[0032] The reference numerals in the figure are denoted as: 1, tower body; 2, gas outlet; 3, liquid outlet; 4, reflux port; 5, liquid inlet pipe; 50, outer pipe joint; 51, liquid inlet inner pipe; 510, inner layer; 511, outer layer; 512, threaded hole; 513, first round hole; 514, spray head; 515, second round hole; 52, support block; 53, flange end; 54, connecting part; 55, mounting hole. Detailed Embodiment

[0033] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0034] Embodiment 1:

[0035] This embodiment provides a structure of the liquid inlet pipe 5 of a rectification tower, including:

[0036] A tower body 1, with a gas outlet 2 opened at its top, a liquid outlet 3 opened at its bottom, and a reflux port 4 opened on its side;

[0037] A liquid inlet pipe 5, installed on the side of the middle section of the tower body 1, and including an outer pipe joint 50 and a liquid inlet inner pipe 51;

[0038] Among them, the liquid inlet inner tube 51 includes an inner layer 510 and an outer layer 511. Both the inner layer 510 and the outer layer 511 are communicated with the outer tube joint 50, and one end of the outer layer 511 away from the outer tube joint 50 is closed;

[0039] At the same time, the surface of the inner layer 510 can be coated with a heat-insulating coating material, and its specific material is adjusted according to the properties of the liquid in the liquid inlet pipe 5. This is a mature existing technology and will not be elaborated here.

[0040] It can be seen from this embodiment that by setting the liquid inlet pipe 5 into a double-layer structure of the inner layer 510 and the outer layer 511, and both the inner layer 510 and the outer layer 511 are communicated with the outer tube joint 50, when liquid enters through the liquid inlet pipe 5, both the inner layer 510 and the outer layer 511 are filled with liquid. When the liquid inlet pipe 5 is in a high-temperature steam environment, the outer layer 511 is heated, and the liquid therein absorbs heat and vaporizes, which can slow down the influence of the high-temperature steam on the inner layer 510, ensure the efficiency of liquid inlet from the inner layer 510, and improve the stability of liquid inlet;

[0041] The heat-insulating coating material coated on the surface of the inner layer 510 can reduce the heat conduction from the outer layer 511 to the inner layer 510, and by integrating the heat-insulating coating, the service life of the heat-insulating coating can be effectively extended.

[0042] Embodiment 2:

[0043] This embodiment provides a structure of the liquid inlet pipe 5 of a rectification column. In addition to including the technical solutions of the above embodiment, it also has the following technical features:

[0044] The inner layer 510 is provided with a plurality of threaded holes 512, and the outer layer 511 is provided with a plurality of first circular holes 513 coaxially arranged with the threaded holes 512;

[0045] Among them, a plurality of spray nozzles 514 are installed on the plurality of threaded holes 512, and the plurality of spray nozzles 514 respectively pass through the plurality of first circular holes 513 and extend to the surface of the outer layer 511.

[0046] It can be seen from this embodiment that by providing a plurality of threaded holes 512 in the inner layer 510 and a plurality of first circular holes 513 coaxially arranged therewith in the outer layer 511, a plurality of spray nozzles 514 can be installed on the plurality of threaded holes 512 in the inner layer 510, and the spray nozzles 514 can pass through the plurality of first circular holes 513 and extend to the surface of the liquid inlet pipe 5, thereby effectively ensuring the uniformity and stability of liquid inlet of the liquid inlet pipe 5 and improving the liquid inlet efficiency.

[0047] Embodiment 3:

[0048] This embodiment provides a structure of the liquid inlet pipe 5 of a rectification column. In addition to including the technical solutions of the above embodiment, it also has the following technical features:

[0049] A plurality of spray nozzles 514 are arranged in two rows at equal intervals, and the two rows of spray nozzles 514 are respectively inclined towards the inner wall of the tower body 1;

[0050] Among them, the inclination angle of the two rows of spray nozzles 514 can be 45°, that is, the two rows of spray nozzles 514 are arranged perpendicular to each other;

[0051] At the same time, the plurality of spray nozzles 514 can adopt atomizing spray nozzles 514, that is, further expand the distribution area in the tower body 1 to ensure uniformity.

[0052] It can be seen from this embodiment that by arranging the plurality of spray nozzles 514 in two rows and inclining them 45° towards the inner wall side of the tower body 1, the uniformity of liquid outflow can be further improved, the contact efficiency between the liquid and the rising steam and the heat transfer efficiency can be ensured, and the rectification effect can be improved.

[0053] Embodiment 4:

[0054] This embodiment provides a structure of the liquid inlet pipe 5 of a rectification tower. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0055] A plurality of second round holes 515 are also opened on the outer layer 511.

[0056] It can be seen from this embodiment that by opening a plurality of second round holes 515 on the outer layer 511, the gas formed by vaporization of the liquid in the outer layer 511 can flow out from the second round holes 515, and then new liquid can be replenished in the outer layer 511, which can avoid the temperature of the outer layer 511 being too high and conducting heat to the inner layer 510, and play a good heat insulation effect on the inner layer 510;

[0057] And in the initial stage, the second round holes 515 can also be used as the liquid outlet 3 to further ensure the liquid inlet efficiency and uniformity. The vaporized gas flows out from the second round holes 515 and rises together with the steam in the tower, which can effectively avoid waste of this part of heat, effectively improve the thermal efficiency of the steam, and reduce heat loss.

[0058] Embodiment 5:

[0059] This embodiment provides a structure of the liquid inlet pipe 5 of a rectification tower. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0060] A plurality of second round holes 515 are vertically opened towards the top of the tower body 1.

[0061] It can be seen from this embodiment that by vertically opening a plurality of second round holes 515 towards the top of the tower body 1, the stability and uniformity of the rising steam can be ensured, the influence on the rising of the rising steam can be avoided, and the part of the steam blocked at the liquid inlet pipe 5 in the tower can be compensated.

[0062] Example 6:

[0063] This example provides a structure of the liquid inlet pipe 5 of a distillation column. In addition to including the technical solutions of the above examples, it also has the following technical features, including:

[0064] Support blocks 52 are installed between the inner layer 510 and the outer layer 511 and are used for the fixed connection between the inner layer 510 and the outer layer 511;

[0065] Among them, the support blocks 52 are installed on the side of the inner layer 510 and the outer layer 511 close to the outer pipe joint 50, and a plurality of them are arranged at equal intervals in a circumferential direction, and welding can be used.

[0066] It can be seen from this example that through the setting of the support blocks 52, the structural strength and stability between the inner layer 510 and the outer layer 511 are effectively improved, and the liquid inlet of the outer layer 511 can be avoided from being affected, which is convenient for liquid inlet and liquid supplement in the outer layer 511.

[0067] Example 7:

[0068] This example provides a structure of the liquid inlet pipe 5 of a distillation column. In addition to including the technical solutions of the above examples, it also has the following technical features:

[0069] The liquid inlet inner pipe 51 is detachably connected to the outer pipe joint 50. One end of the liquid inlet inner pipe 51 close to the outer pipe joint 50 is provided with a flange end 53, and the outer pipe joint 50 is provided with a connection part 54 at the inner wall of the tower body 1, and a mounting hole 55 is opened in the connection part 54;

[0070] Among them, the outer pipe joint 50 and the tower body 1 can be welded, the flange end 53 and the liquid inlet inner pipe 51 can be welded, and the mounting hole 55 is a threaded hole 512, and the flange end 53 and the connection part 54 can be fixedly connected by bolts.

[0071] It can be seen from this example that by providing the connection part 54 at the inner wall of the tower body 1 for the outer pipe joint 50 and providing the flange end 53 at one end of the liquid inlet inner pipe 51, the detachable installation and connection of the liquid inlet inner pipe 51 are facilitated. Furthermore, it is convenient to disassemble and clean the liquid inlet inner pipe 51, improving the convenience, and the connection part 54 facilitates the connection of bolts and the connection strength and stability after installation.

[0072] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the specific embodiments described above. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A liquid inlet pipe structure of a distillation tower, characterized in that: include: A tower body (1) is provided with a gas outlet (2) at the top, a liquid outlet (3) at the bottom, and a reflux outlet (4) at the side; A liquid inlet pipe (5) is installed on the side of the middle section of the tower body (1) and comprises an outer pipe joint (50) and a liquid inlet inner pipe (51); The liquid inlet inner tube (51) comprises an inner layer (510) and an outer layer (511), and both the inner layer (510) and the outer layer (511) are connected to the outer tube joint (50), and one end of the outer layer (511) away from the outer tube joint (50) is closed.

2. The liquid inlet pipe structure of the distillation tower according to claim 1, characterized in that: The inner layer (510) is provided with a plurality of threaded holes (512), and the outer layer (511) is provided with a plurality of first circular holes (513) coaxially arranged with the threaded holes (512); Wherein, each of the plurality of threaded holes (512) is provided with a nozzle (514), and the plurality of nozzles (514) respectively pass through the plurality of first circular holes (513) and extend to the surface of the outer layer (511).

3. The liquid inlet pipe structure of the distillation tower according to claim 2, characterized in that: The plurality of nozzles (514) are arranged in two rows at equal intervals, and the two rows of nozzles (514) are respectively arranged to be inclined toward the inner wall of the tower body (1).

4. The liquid inlet pipe structure of the distillation tower according to claim 1, characterized in that: The outer layer (511) is also provided with a plurality of second circular holes (515).

5. The liquid inlet pipe structure of the distillation tower according to claim 4, characterized in that: A plurality of the second circular holes (515) are vertically opened toward the top of the tower body (1).

6. The liquid inlet pipe structure of the distillation tower according to claim 1, characterized in that: Also includes: The support block (52) is installed between the inner layer (510) and the outer layer (511) and is used for fixing the inner layer (510) and the outer layer (511).

7. The liquid inlet pipe structure of the distillation tower according to claim 1, characterized in that: The liquid inlet inner tube (51) is detachably connected to the outer tube joint (50), and a flange end (53) is provided at one end of the liquid inlet inner tube (51) close to the outer tube joint (50), while the outer tube joint (50) is provided with a connecting portion (54) located on the inner wall of the tower body (1), and a mounting hole (55) is provided in the connecting portion (54).

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