Improved multi-stage chemical distillation tower

Abstract

The utility model discloses an improved multistage chemical distillation tower which comprises a liquid tank, a tower body is assembled on the liquid tank, a plurality of tower trays are uniformly distributed in the tower body, a preheating tray is assembled on the upper surface of the tower body, a preheating pipe fitting is arranged in the preheating tray, one end of the preheating pipe fitting is connected with a liquid inlet pipe, and the other end of the preheating pipe fitting is connected with a liquid outlet. The liquid outlet is formed in the upper end of the tower body, the tail end of the liquid inlet pipe penetrates through the liquid tank and extends into the liquid tank, and a water pump is mounted at the tail end of the liquid inlet pipe. In order to solve the potential safety hazard that the temperature of the distillation tower is relatively high, a preheating disc is arranged on the tower top, the preheating disc is communicated with the tower body, and a preheating pipe fitting is arranged in the preheating disc, so that a distilled solution does not directly enter the tower body; instead, the solution enters the preheating pipe fitting through the liquid inlet pipe to absorb a certain amount of high temperature at the upper end of the tower top and then is discharged into the tower body, so that the solution needing to be distilled is preheated, and the distillation efficiency is improved to a certain extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, in particular to an improved multi-stage chemical distillation tower. Background Art

[0002] In the prior art, multi-stage chemical distillation towers have certain deficiencies: the top temperature of the distillation tower is relatively high. When the crude distillation tower operates normally, the top temperature of the tower is relatively high. Generally, the top temperature of the tower shall not be lower than 93°C but shall not be too high. Due to insufficient real-time control of the top temperature of the distillation tower, there is a potential safety hazard of fire.

[0003] Chinese utility model patent CN217041345U discloses a multi-stage chemical distillation tower structure, which can monitor the temperature of the top of the distillation tower in real time by setting a cooling structure and using a temperature sensor. When the temperature is too high, a water pump can be used to spray the coolant in the water tank to the top of the distillation tower through a high-pressure nozzle, and then a driving motor can be used to drive the outer sleeve to slide in the vertical direction through a screw rod, so that the high-pressure nozzle can perform all-round cooling treatment on multiple positions of the distillation tower, thereby avoiding the safety hazard of fire caused by the high temperature at the top of the distillation tower due to long-term operation of the distillation tower.

[0004] The above technology uses spraying coolant to cool the top of the tower, but the addition of coolant will change the concentration of the liquid inside the distillation tower, so that excessive water will be produced during distillation, reducing the distillation efficiency. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In order to solve the problems existing in the above-mentioned background technology, the utility model adopts the following technical solutions.

[0007] An improved multi-stage chemical distillation tower comprises a liquid box, a tower body is mounted on the liquid box, and a plurality of tower plates are evenly distributed in the tower body, a preheating plate is mounted on the upper surface of the tower body, a preheating pipe is built in the preheating plate, a liquid inlet pipe is connected to one end of the preheating pipe, and a liquid outlet is connected to the other end of the preheating pipe, the liquid outlet is located at the upper end of the tower body, the end of the liquid inlet pipe passes through the liquid box and extends into the liquid box, and a water pump is installed at the end of the liquid inlet pipe.

[0008] Preferably, the preheating pipe comprises an upper spiral tube and a lower spiral tube, the upper spiral tube and the lower spiral tube are distributed up and down in the preheating disk, and the upper spiral tube and the lower spiral tube are connected end to end.

[0009] The other end of the upper spiral tube is connected to the liquid inlet tube; the other end of the lower spiral tube is connected to the liquid outlet, and the upper spiral tube and the lower spiral tube are not in contact.

[0010] The interior of the tower plate is divided into a plurality of cavities by the tower plate, and the side wall of each cavity is connected with a connecting pipe, and the port of the connecting pipe is equipped with a connecting flange.

[0011] Notches are cut on the tower plate, and baffles are arranged at the notches to seal the notches. The positions of the notches on the multiple tower plates are staggered.

[0012] A through hole is opened at the center of the tower plate, and a steam cap is connected to the upper surface of the through hole. The steam cap includes a fixed sleeve integrally connected to the upper surface of the tower plate, a connecting sleeve is movably connected inside the fixed sleeve, and a plurality of steam holes are opened in a circular manner at the lower end of the connecting sleeve.

[0013] An end cover is arranged on the upper surface of the connecting sleeve, and the diameter of the end cover is larger than the diameter of the fixing sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) In order to solve the potential safety hazard of fire caused by the high temperature of the distillation tower, the utility model installs a preheating plate on the top of the tower, which is connected to the tower body. A preheating pipe is built into the preheating plate. The solution used for distillation does not directly enter the tower body, but first enters the preheating pipe through the liquid inlet pipe to absorb a certain amount of the higher temperature at the top of the tower before being discharged into the tower body, thereby preheating the solution to be distilled, thereby improving the distillation efficiency to a certain extent.

[0016] (2) The preheating pipe in the utility model is composed of two sections of spiral pipes connected at the end. The larger surface area of ​​the spiral pipe is utilized to allow the solution to be distilled inside the spiral pipe to absorb as much heat as possible, thereby effectively alleviating the high temperature problem in the top area of ​​the tower.

[0017] (3) In order to achieve a slow rise of steam inside the tower body, thereby preventing high-temperature steam from quickly gathering at the upper end of the tower body and causing high-temperature accumulation, the utility model is provided with a steam cap on the tower plate. The steam cap is composed of a fixed sleeve and a connecting sleeve. The connecting sleeve can slide on the fixed sleeve. In the initial state, the steam can only move upward from the notch of the tower plate. However, since the notch is also a channel for the solution to flow downward, the steam rising space is small, and the steam gathers under the tower plate, causing the pressure and temperature to continue to rise. Once the pressure reaches a certain level, the connecting sleeve with an end cover will be lifted up. At this time, the steam can be discharged through the steam hole opened on the side of the connecting sleeve and continue to move to the upper layer of the tower body. The design of the steam cap ensures that the steam can only move upward at a large flow rate after reaching a certain pressure and temperature. This design slows down the movement speed of the steam, thereby reducing the temperature at the top of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the distillation tower in the utility model.

[0019] Figure 2 It is a schematic diagram of the assembly structure of the preheating pipe fitting in the utility model.

[0020] Figure 3 It is a cross-sectional view of the distillation tower in the utility model.

[0021] Figure 4 This is a diagram of the internal structure of the distillation tower in the utility model.

[0022] Figure 5 It is the internal plan view of the distillation tower in the utility model.

[0023] Figure 6 This is a structural diagram of the tower plate in the utility model.

[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0025] 1. Liquid tank; 2. Tower body; 21. Tower plate; 211. Baffle; 22. Steam cap; 221. Fixed sleeve; 222. Connecting sleeve; 2221. End cover; 2222. Steam hole; 23. Connecting pipe; 231. Connecting flange; 3. Preheating plate; 31. Preheating pipe fittings; 311. Upper spiral tube; 312. Lower spiral tube; 313. Liquid outlet; 314. Liquid inlet pipe. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0029] Figure 1 and Figure 2 The structure diagram of the improved multi-stage chemical distillation tower in this embodiment includes a liquid tank 1, a tower body 2 is mounted on the liquid tank 1, and a plurality of trays 21 are evenly distributed in the tower body 2. A preheating tray 3 is mounted on the upper surface of the tower body 2. A preheating pipe 31 is built in the preheating tray 3. One end of the preheating pipe 31 is connected to a liquid inlet pipe 314, and the other end of the preheating pipe 31 is connected to a liquid outlet 313. The liquid outlet 313 is located at the upper end of the tower body 2. In order to solve the safety hazard of fire caused by the high temperature of the tower body 2, a preheating tray 3 is installed on the top of the tower body 2 in this embodiment. The preheating tray 3 is communicated with the tower body 2, and the preheating pipe 31 is built in the preheating tray 3. The solution to be distilled does not directly enter the tower body 2, but first enters the preheating pipe fitting 31 through the liquid inlet pipe 314 to absorb a certain amount of the higher temperature at the top of the tower body 2 before being discharged into the tower body 2, thereby preheating the solution to be distilled, which improves the distillation efficiency to a certain extent. It should be noted that in the present application, the end of the liquid inlet pipe 314 can be connected to an external pipeline to introduce the solution to be distilled into the preheating pipe fitting 31, and the liquid inlet pipe 314 can also be made to extend through the liquid tank 1 to the inside, and a water pump is installed at the end of the liquid inlet pipe 314, and the solution in the liquid tank 1 is pumped out by the water pump and sent into the preheating pipe fitting 31 through the liquid inlet pipe 314.

[0030] See also Figure 4 and Figure 5The preheating pipe 31 in this embodiment includes an upper spiral pipe 311 and a lower spiral pipe 312, which are distributed up and down in the preheating plate 3, and the upper spiral pipe 311 and the lower spiral pipe 312 are connected end to end. The preheating pipe 31 in this embodiment is composed of the upper spiral pipe 311 and the lower spiral pipe 312 connected at the end, and the large surface area of ​​the upper spiral pipe 311 and the lower spiral pipe 312 is used to make the solution to be distilled therein absorb as much heat as possible, thereby effectively alleviating the high temperature problem in the tower top area; further, in this embodiment The specific connection status of the preheating pipe 31, the liquid inlet pipe 314 and the liquid outlet 313 is: the other end of the upper spiral tube 311 is connected to the liquid inlet pipe 314; the other end of the lower spiral tube 312 is connected to the liquid outlet 313, and the solution to be distilled enters the upper spiral tube 311 through the liquid inlet pipe 314. When the solution fills the upper spiral tube 311, it flows into the lower spiral tube 312. In this process, the solution absorbs heat to achieve preheating. It should be noted that in order to ensure the surface area of ​​the preheating pipe 31, the upper spiral tube 311 and the lower spiral tube 312 in this application are not in contact with each other.

[0031] See also Figure 2-Figure 4 Since different distillates in the solution require different temperatures, the interior of the tower body 2 is divided into multiple cavities by the tower tray 21, and the distilled products need to be collected in time. Therefore, the present application is connected to the side wall of each cavity with a connecting pipe 23, and the port of the connecting pipe 23 is equipped with a connecting flange 231. The connecting flange 231 is connected to the external collecting pipe to collect the distillate generated by each layer of the cavity lock in the tower tray 21.

[0032] See also Figure 4 In order to ensure that the solution can fill each cavity of the tower body 2 from top to bottom at one time, the present embodiment cuts a notch on the tower plate 21 for the solution to flow downward. At the same time, in order to ensure that each tower plate 21 can store a certain amount of solution, the present application provides a baffle 211 at the notch to seal the notch. Furthermore, in order to ensure that the solution can accurately fall on each tower plate 21 when flowing downward through the notch, the present embodiment staggers the opening positions of the notches on multiple tower plates 21.

[0033] See also Figure 6In order to achieve a slow rise of the steam inside the tower body 2, thereby preventing the high-temperature steam from quickly gathering at the upper end of the tower body 2 and causing high-temperature accumulation, a through hole is opened at the center of the tower plate 21 in this embodiment, and a steam cap 22 is connected to the upper surface of the through hole. The steam cap 22 includes a fixed sleeve 221 integrally connected to the upper surface of the tower plate 21, and a connecting sleeve 222 is movably sleeved in the fixed sleeve 221. The lower end of the connecting sleeve 222 is circularly opened with a plurality of steam holes 2222. In the initial state, the steam can only move upward from the notch of the tower plate 21. However, since the notch is also a channel for the solution to flow downward, the steam rising space is small, and the steam is below the tower plate 21. The steam gathers, causing the pressure and temperature to continue to rise. When the steam pressure reaches a certain level, the connecting sleeve 222 is lifted up, and the steam can be discharged through the steam hole 2222 opened on the side of the connecting sleeve 222. The steam cap 22 can make the whole body move upward at a large flow rate only after reaching a certain pressure and temperature, thereby slowing down the steam movement and reducing the temperature at the top of the tower body 2. Furthermore, in order to facilitate the connecting sleeve 222 to slide on the fixed sleeve 221 without falling off, and to ensure that the rising force of the steam can act on the connecting sleeve 222, the present application provides an end cover 2221 on the upper surface of the connecting sleeve 222, and the diameter of the end cover 2221 is larger than the diameter of the fixed sleeve 221.

[0034] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An improved multi-stage chemical distillation tower, comprising a liquid box (1), a tower body (2) mounted on the liquid box (1), and a plurality of tower trays (21) uniformly distributed in the tower body (2), Features: The upper surface of the tower body (2) is equipped with a preheating disk (3), the preheating disk (3) having a preheating pipe (31) built therein, one end of the preheating pipe (31) being connected to a liquid inlet pipe (314), and the other end of the preheating pipe (31) being connected to a liquid outlet (313), the liquid outlet (313) being located at the upper end of the tower body (2), the end of the liquid inlet pipe (314) penetrating the liquid tank (1) and extending into the liquid tank (1), and a water pump being installed at the end of the liquid inlet pipe (314).

2. An improved multi-stage chemical distillation tower according to claim 1, characterized in that: The preheating pipe (31) comprises an upper spiral tube (311) and a lower spiral tube (312), the upper spiral tube (311) and the lower spiral tube (312) are distributed up and down in the preheating disk (3), and the upper spiral tube (311) and the lower spiral tube (312) are connected end to end.

3. An improved multi-stage chemical distillation tower according to claim 2, characterized in that: The other end of the upper spiral tube (311) is connected to the liquid inlet tube (314); the other end of the lower spiral tube (312) is connected to the liquid outlet (313), and the upper spiral tube (311) and the lower spiral tube (312) are not in contact with each other.

4. An improved multi-stage chemical distillation tower according to claim 2, characterized in that: The interior of the tower tray (21) is divided into a plurality of cavities by the tower tray (21), and a side wall of each cavity is connected to a connecting pipe (23), and a port of the connecting pipe (23) is equipped with a connecting flange (231).

5. An improved multi-stage chemical distillation tower according to claim 2, characterized in that: A notch is cut on the tower plate (21), and a baffle (211) is provided at the notch to seal the notch. The positions of the notches on the multiple tower plates (21) are staggered.

6. An improved multi-stage chemical distillation tower according to claim 5, characterized in that: A through hole is provided at the center of the tower plate (21), and a steam cap (22) is connected to the upper surface of the through hole. The steam cap (22) comprises a fixed sleeve (221) integrally connected to the upper surface of the tower plate (21), a connecting sleeve (222) is movably sleeved inside the fixed sleeve (221), and a plurality of steam holes (2222) are provided at the lower end of the connecting sleeve (222) in a circular pattern.

7. An improved multi-stage chemical distillation tower according to claim 6, characterized in that: An end cover (2221) is provided on the upper surface of the connecting sleeve (222), and the diameter of the end cover (2221) is greater than the diameter of the fixing sleeve (221).

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