Quick start-up equipment for light component removal tower

Abstract

The utility model discloses light component removal tower quick-start equipment which comprises a distillation tower, a tower discharge pipe is installed at the bottom of the distillation tower, one end, far away from the distillation tower, of the tower discharge pipe is fixedly connected with a discharge branch pipe through a flange, meanwhile, a chemical pump is fixedly arranged on the discharge branch pipe, and a second valve is fixedly arranged on the discharge branch pipe. An inlet in one end of the chemical pump is communicated with the tower discharge pipe, an outlet in one end of the chemical pump is fixedly connected with a pressurizing pipe through a flange, and a third valve is mounted on the pressurizing pipe. According to the quick start-up equipment for the light component removal tower, an inlet of a chemical pump is connected to a discharge branch pipe communicated with the bottom of a distillation tower, and an outlet of the chemical pump is connected to the bottom of a second thermosyphon reboiler and mounted on a pressurizing pipe; and an external switch of the chemical pump is turned on, so that the light component-containing product in the distillation tower is forcibly conveyed into the second thermosyphon reboiler, the liquid level is well controlled, the operation time of returning to normal of the tower is shortened through forced conveying, and meanwhile, the energy consumption is saved.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a quick start-up device for a light removal tower. Background Technique

[0002] As shown in the instruction manual appendix Figure 1 As shown: The original reboiler of the light removal tower is a thermosyphon reboiler with a vertical structure. The thermosyphon reboiler is a natural circulation type. The liquid at the bottom of the distillation tower enters the reboiler and is heated to partially vaporize. The inlet pipeline of the reboiler is filled with liquid, while the outlet pipeline contains a vapor-liquid mixture; the vapor-liquid mixture after heating and vaporization automatically returns to the tower, and the reboiler can continuously circulate without a pump.

[0003] The above device has the following defects during actual use: It takes a long time to reach equilibrium during normal start-up, and it takes a long time from start-up to the product at the bottom of the tower being qualified. Because after parking, the light component materials in the tower all fall to the bottom of the tower, and it usually takes about 15 hours to extract the bottom light components, which greatly increases the normal operation time of the tower and also increases energy consumption. Content of the Utility Model

[0004] The purpose of the utility model is to provide a quick start-up device for a light removal tower to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, a quick start-up device for a light removal tower is provided, including a distillation tower. A tower discharge pipe is installed at the bottom of the distillation tower, and the end of the tower discharge pipe away from the distillation tower is fixedly connected to a discharge branch pipe through a flange. At the same time, a chemical pump is fixedly arranged on the discharge branch pipe, and a second valve is fixedly arranged on the discharge branch pipe. One end inlet of the chemical pump is communicated with the tower discharge pipe. One end outlet of the chemical pump is fixedly connected to a pressurization pipe through a flange. A third valve is installed on the pressurization pipe. At the same time, the bottom of a second thermosyphon reboiler is fixedly arranged at the end of the pressurization pipe. One end outlet of the chemical pump is communicated with the second thermosyphon reboiler. A first valve is installed on the tower discharge pipe, and the end of the tower discharge pipe is fixedly communicated with a first thermosyphon reboiler.

[0006] Preferably, the first thermosyphon reboiler and the second thermosyphon reboiler are arranged in parallel, and the size of the second thermosyphon reboiler is larger than that of the first thermosyphon reboiler. At the same time, the heat transfer area of the second thermosyphon reboiler is larger than that of the first thermosyphon reboiler.

[0007] Preferably, the tops of the first thermosyphon reboiler and the second thermosyphon reboiler are both communicated with the inside of the distillation tower through pipelines, and a fourth valve is installed on the pipeline at the top of the second thermosyphon reboiler.

[0008] Preferably, the liquid at the bottom of the distillation column is connected to the second thermosyphon reboiler through a column discharge pipe, a second valve, a discharge branch pipe, a chemical pump, and a pressurizing pipe.

[0009] Preferably, the liquid at the bottom of the distillation column is connected to the first thermosyphon reboiler through a column discharge pipe and a first valve.

[0010] Preferably, the chemical pump is a high-temperature resistant pump, and the chemical pump is on the discharge branch pipe and is arranged between the second valve and the third valve.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The inlet of the chemical pump is connected to the discharge branch pipe communicating with the bottom of the distillation column, and the outlet of the chemical pump is connected to the bottom of the second thermosyphon reboiler installed on the pressurizing pipe; By turning on the external switch of the chemical pump, the light-component product in the distillation column is forcibly transported into the second thermosyphon reboiler, and the liquid level is controlled. Through forced transportation, the time for the tower to return to normal operation is reduced, and energy consumption is saved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic diagram of the operation of the thermosyphon reboiler in the prior art submitted in the background art;

[0013] Figure 2 FIG. is a front view of the structure of the present utility model;

[0014] Figure 3 FIG. is a schematic diagram of the second embodiment of the structure of the present utility model;

[0015] Figure 4 FIG. is a schematic diagram of the third embodiment of the structure of the present utility model;

[0016] Reference numerals in the figure: 1, distillation column; 2, first thermosyphon reboiler; 3, second thermosyphon reboiler; 4, chemical pump; 5, first valve; 51, second valve; 52, third valve; 53, fourth valve; 6, column discharge pipe; 7, discharge branch pipe; 8, pressurizing pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1: Please refer to Figure 2, the present utility model provides a quick start-up device for a light removal tower, which includes a distillation tower 1. A tower discharge pipe 6 is installed at the bottom of the distillation tower 1, and one end of the tower discharge pipe 6 away from the distillation tower 1 is fixedly connected to a discharge branch pipe 7 through a flange. At the same time, a chemical pump 4 is fixedly arranged on the discharge branch pipe 7, and a second valve 51 is fixedly arranged on the discharge branch pipe 7. One end inlet of the chemical pump 4 is communicated with the tower discharge pipe 6. One end outlet of the chemical pump 4 is fixedly connected to a pressurizing pipe 8 through a flange. A third valve 52 is installed on the pressurizing pipe 8. At the same time, the end of the pressurizing pipe 8 is fixedly arranged at the bottom of the second thermosiphon reboiler 3, and one end outlet of the chemical pump 4 is communicated with the second thermosiphon reboiler 3. A first valve 5 is installed on the tower discharge pipe 6, and the end of the tower discharge pipe 6 is fixedly communicated with the first thermosiphon reboiler 2.

[0019] Working principle: A first valve 5 is added to the liquid-phase tower discharge pipe 6 between the first thermosiphon reboiler 2 and the distillation tower 1, and a second thermosiphon reboiler 3 is added. It should be noted that the heat exchange area of the second thermosiphon reboiler 3 is larger than that of the first thermosiphon reboiler 2. At the same time, a high-temperature-resistant chemical pump 4 is added. The inlet of the chemical pump 4 is connected to the discharge branch pipe 7 communicating with the bottom of the distillation tower 1, and the outlet of the chemical pump 4 is connected to the bottom of the second thermosiphon reboiler 3 installed on the pressurizing pipe 8. Close the corresponding valves, turn on the external switch of the chemical pump 4, force the light-component product in the distillation tower 1 to be transported into the second thermosiphon reboiler 3, and control the liquid level. By forced transportation, the time for the tower to return to normal operation is reduced, and at the same time, energy consumption is saved.

[0020] As a preferred embodiment, the first thermosiphon reboiler 2 and the second thermosiphon reboiler 3 are connected in parallel, and the size of the second thermosiphon reboiler 3 is larger than that of the first thermosiphon reboiler 2. At the same time, the heat exchange area of the second thermosiphon reboiler 3 is larger than that of the first thermosiphon reboiler 2.

[0021] The tops of both the first thermosiphon reboiler 2 and the second thermosiphon reboiler 3 are communicated with the inside of the distillation tower 1 through pipes, and a fourth valve 53 is installed on the pipe at the top of the second thermosiphon reboiler 3.

[0022] The liquid at the bottom of the distillation tower 1 is communicated with the second thermosiphon reboiler 3 through the tower discharge pipe 6, the second valve 51, the discharge branch pipe 7, the chemical pump 4, and the pressurizing pipe 8.

[0023] As a preferred embodiment, the liquid at the bottom of the distillation tower 1 is communicated with the first thermosiphon reboiler 2 through the tower discharge pipe 6 and the first valve 5.

[0024] The chemical pump 4 is a high-temperature-resistant pump, and the chemical pump 4 is arranged on the discharge branch pipe 7 and is arranged between the second valve 51 and the third valve 52.

[0025] Example 2: As Figure 3 shown: The structure of this example is basically the same as that of Example 1, the difference is that: a valve is added to the liquid phase pipeline between the first thermosiphon reboiler 2 and the distillation column 1, and at the same time a high-temperature chemical pump 4 is added. The inlet of the pump is connected to the upper end of the valve; it is connected to the liquid phase pipeline at the bottom of the distillation column 1, the outlet of the pump is connected to the lower end of the valve; it is connected to the liquid phase pipeline at the bottom of the first thermosiphon reboiler 2. Close the valve and start the chemical pump 4 to forcibly transport the light component product in the distillation column 1 into the reboiler. Through forced transportation, the time for the tower to return to normal operation is reduced, and at the same time, energy consumption is saved.

[0026] Example 3: As Figure 4 shown: The structure of this example is basically the same as that of Example 1, the difference is that: a valve is added to the liquid phase pipeline between the first thermosiphon reboiler 2 and the distillation column 1, and a second thermosiphon reboiler 3 is added. The second thermosiphon reboiler 3 in this example is a kettle reboiler; the heat exchange volume of this kettle reboiler is larger than that of the first thermosiphon reboiler 2; the kettle reboiler is installed at a low position so that the liquid in the distillation column 1 can all flow into the interior of the kettle reboiler. The inlet of the pump is connected to the upper end of the valve and the liquid phase pipeline at the tower end; the outlet of the pump is connected to the lower end of the valve and the liquid phase pipeline at the reboiler end; close the valve and start the chemical pump 4 to forcibly transport the light component product in the distillation column 1 into the interior of the kettle reboiler. Through forced transportation, the time for the tower to return to normal operation is reduced, and at the same time, energy consumption is saved.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightness removal tower quick start-up device, comprising a distillation tower (1), characterized in that: A tower discharge pipe (6) is installed at the bottom of the distillation tower (1), and one end of the tower discharge pipe (6) away from the distillation tower (1) is fixedly connected to a discharge branch pipe (7) via a flange. A chemical pump (4) is fixedly installed on the discharge branch pipe (7), and a second valve (51) is fixedly installed on the discharge branch pipe (7). An inlet of one end of the chemical pump (4) is connected to the tower discharge pipe (6). An outlet of one end of the chemical pump (4) is fixedly connected to a boosting pipe (8) via a flange, and a third valve (52) is installed on the boosting pipe (8). At the same time, the bottom of the second thermosyphon reboiler (3) is fixedly installed at the end of the boosting pipe (8), and one outlet of the chemical pump (4) is connected to the second thermosyphon reboiler (3). A first valve (5) is installed on the tower discharge pipe (6), and an end of the tower discharge pipe (6) is fixedly connected to the first thermosyphon reboiler (2).

2. A lightness removal tower quick start-up equipment according to claim 1, characterized in that: The first thermosyphon reboiler (2) and the second thermosyphon reboiler (3) are arranged in parallel, and the size of the second thermosyphon reboiler (3) is larger than the size of the first thermosyphon reboiler (2), and the heat exchange area of ​​the second thermosyphon reboiler (3) is larger than the heat exchange area of ​​the first thermosyphon reboiler (2).

3. A lightness removal tower quick start-up equipment according to claim 1, characterized in that: The tops of the first thermosyphon reboiler (2) and the second thermosyphon reboiler (3) are both connected to the interior of the distillation tower (1) via pipelines, and a fourth valve (53) is installed on the pipeline at the top of the second thermosyphon reboiler (3).

4. A lightness removal tower quick start-up equipment according to claim 1, characterized in that: The liquid at the bottom of the distillation tower (1) is connected to the second thermosyphon reboiler (3) via a tower discharge pipe (6), a second valve (51), a discharge branch pipe (7), a chemical pump (4), and a booster pipe (8).

5. The quick start-up equipment of a lightness removal tower according to claim 1 is characterized in that: The liquid at the bottom of the distillation tower (1) is connected to the first thermosyphon reboiler (2) via a tower discharge pipe (6) and a first valve (5).

6. A lightness removal tower quick start-up equipment according to claim 1, characterized in that: The chemical pump (4) is a high temperature resistant pump, and the chemical pump (4) is arranged on the discharge branch pipe (7) between the second valve (51) and the third valve (52).

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