System for reducing blockage of reboiler and prolonging service cycle

Abstract

The utility model relates to a system for reducing blockage of a reboiler and prolonging the service cycle. The system comprises a rectifying tower and the reboiler, the bottom of the rectifying tower is connected with one end of a header pipe, the other end of the header pipe is connected with one end of a first branch pipe and one end of a second branch pipe, the other end of the first branch pipe and the other end of the second branch pipe are both connected with a liquid inlet of the reboiler, the first branch pipe and the second branch pipe are both provided with control valves, the second branch pipe is provided with a power pump, and the power pump is connected with the reboiler. The power pump is located on the rear side of the control valve. And a gas-liquid outlet of the reboiler is connected with the middle part of the rectifying tower through a liquid return pipe. According to the utility model, the branch pipe I and the branch pipe II are arranged, and the power pump is arranged on the branch pipe II to provide power, so that the liquid level in the reboiler is always kept in a full-flow state, the phenomenon that the tubes in the reboiler are heated unevenly is avoided, the liquid circulation volume is increased, the heat exchange efficiency is improved, and the service life of the reboiler is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to reboiler technical field especially relates to a system that reduces reboiler block and prolongs service life. BACKGROUND

[0002] Reboiler is an important component in rectifying tower, through heating, the liquid at the bottom of rectifying tower is vaporized to reboiler steam, thereby extracting the light component in the tower bottom liquid, and then improving the purity of distillate; in actual production, reboiler often appears the problems such as blockage, leakage and so on, need to stop work and overhaul or replace new equipment, and the operation cost of enterprise is increased.

[0003] After reboiler overhaul, it is found that the liquid level at the bottom of rectifying tower is consistent with the liquid level in reboiler, due to the long time of rectifying tower liquid level at low liquid level, the heating of column tube at gas-liquid surface is uneven, leading to the column tube at the region near gas-liquid surface in reboiler to be easily scaled and blocked or leaked.Based on the above reasons, a system that reduces reboiler block and prolongs service life is designed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a system that reduces reboiler block and prolongs service life to solve the technical problems in the background art.

[0005] To achieve the above object, the technical scheme adopted by the utility model is:

[0006] A system that reduces reboiler block and prolongs service life, comprising: rectifying tower and reboiler;One end of the bottom of the rectifying tower is connected with the total pipe, the other end of the total pipe is connected with one end of branch pipe one and branch pipe two, the other end of the branch pipe one and the branch pipe two is connected with the liquid inlet of the reboiler, and control valve is arranged on the branch pipe one and the branch pipe two, power pump is arranged on the branch pipe two, and the power pump is located at the rear side of the control valve;The gas-liquid outlet of the reboiler is connected with the middle part of the rectifying tower through the liquid return pipe.

[0007] As a further improvement of the utility model, liquid level sensor is arranged on the reboiler.

[0008] As a further improvement of the utility model, branch pipe two is connected with one end of branch pipe, the other end of the branch pipe is connected with the inlet of preheater, and the outlet of the preheater is connected with the liquid inlet of the reboiler through liquid outlet pipe;

[0009] Control valve is arranged on the branch pipe two and the branch pipe rear side of the branch pipe.

[0010] As a further improvement of the utility model, ultrasonic generator is arranged on the reboiler.

[0011] As a further improvement of this utility model, the reboiler is equipped with a thermometer.

[0012] As a further improvement of this utility model, the return pipe is equipped with a pressure gauge and a flow meter.

[0013] The beneficial effects of adopting the above technical solution are as follows:

[0014] This invention features a first branch pipe and a second branch pipe. A power pump is installed on the second branch pipe to provide power, ensuring that the liquid level inside the reboiler remains at full flow. This avoids uneven heating of the tubes inside the reboiler, increases the liquid circulation volume, improves heat exchange efficiency, and extends the service life of the reboiler. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention;

[0016] Figure 2 This is a schematic diagram of Embodiment 2 of the present invention;

[0017] The markings in the diagram are as follows: 1. Distillation column, 2. Reboiler, 3. Main pipe, 4. Branch pipe 1, 5. Branch pipe 2, 6. Control valve, 7. Power pump, 8. Return pipe, 9. Liquid level sensor, 10. Branch pipe, 11. Preheater, 12. Discharge pipe, 13. Thermometer, 14. Pressure gauge. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, a clear and complete description of this utility model will be provided below in conjunction with the accompanying drawings.

[0019] Example 1

[0020] like Figure 1 The system shown reduces reboiler clogging and extends its service life includes: a distillation column 1 and a reboiler 2; the bottom of the distillation column 1 is connected to one end of a main pipe 3, and the other end of the main pipe 3 is connected to one end of a branch pipe 4 and a branch pipe 5. The other ends of both branch pipes 4 and 5 are connected to the liquid inlet of the reboiler 2, and each branch pipe is equipped with a control valve 6. A power pump 7 is installed on branch pipe 5, and the power pump 7 is located behind the control valve 6; the gas-liquid outlet of the reboiler 2 is connected to the middle of the distillation column 1 through a return pipe 8. The liquid inlet is located at the lower part of the reboiler 2, and the gas-liquid outlet is located at the upper part of the reboiler 2.

[0021] In this embodiment, rectifying tower 1 and reboiler 2 have two kinds of circulation connection. First, control valve 6 on branch pipe 1 4 is opened, control valve 6 on branch pipe 2 5 is closed, and the liquid at the bottom of rectifying tower 1 flows into reboiler 2 through main pipe 3 and branch pipe 1 4 in turn; reboiler 2 is provided with steam inlet and steam condensate outlet, and the liquid flowing into reboiler 2 is heated by steam to form gas-liquid mixture, which flows into rectifying tower 1 through liquid return pipe 8, and the gas flows upward through the tray, and the liquid drops back to the bottom; this circulation is suitable for the case that the liquid level in rectifying tower 1 is equal to or higher than the top height in reboiler 2, which ensures that reboiler 2 keeps full flow and avoids the phenomenon that the liquid level in reboiler 2 is low and the heating of the tubes is uneven. Second, control valve 6 on branch pipe 2 5 is opened, control valve 6 on branch pipe 1 4 is closed, and the liquid at the bottom of rectifying tower 1 flows into reboiler 2 through main pipe 3 and branch pipe 2 5 in turn; power pump 7 provides power to keep the liquid level in reboiler 2 always in full flow, thereby avoiding the phenomenon that the tubes in reboiler 2 are unevenly heated, and at the same time, increasing the liquid circulation amount and improving the heat exchange efficiency, thereby prolonging the service life of reboiler 2; the liquid in reboiler 2 is heated by steam, and the gas-liquid mixture flows into rectifying tower 1 through liquid return pipe 8.

[0022] In order to observe the liquid level and temperature in reboiler 2, liquid level sensor 9 and thermometer 13 are arranged on reboiler 2. In addition, pressure gauge 14 and flow meter are arranged on liquid return pipe 8 to observe the gas-liquid mixture.

[0023] In order to clean the scale in reboiler 2 and increase the service life of reboiler 2, ultrasonic generator is arranged on reboiler 2 to regularly perform ultrasonic vibration treatment on the inside of reboiler 2 to clean the scale.

[0024] Embodiment 2

[0025] In embodiment 2, the same structure as in embodiment 1 is given the same symbol, and the same description is omitted, and the difference between embodiment 2 and embodiment 1 is the structure of branch pipe 2 5.

[0026] In this embodiment, one end of branch pipe 2 5 is connected with branch pipe 1 0, the other end of branch pipe 1 0 is connected with the inlet of preheater 1 1, the outlet of preheater 1 1 is connected with the liquid inlet of reboiler 2 through liquid outlet pipe 1 2; control valve 6 is arranged on branch pipe 1 0 and branch pipe 2 5 on the rear side of branch pipe 1 0. Control valve 6 on the front side of power pump 7 is used to control whether the liquid in rectifying tower 1 flows through branch pipe 2 5, and control valve 6 on the rear side is used to control whether the liquid enters reboiler 2 after being preheated.

[0027] In order to avoid the fouling in the reboiler 2, the preheater 11 is arranged. In use, the control valve 6 on the branch pipe one 4 is opened, the control valve 6 on the front side of the power pump 7 on the branch pipe two 5 is opened, the control valve 6 on the rear side of the power pump 7 is closed, and the power valve on the branch pipe 10 is opened; the liquid in the rectifying tower 1 enters the reboiler 2 through the branch pipe two 5, the branch pipe 10, the preheater 11 and the liquid outlet pipe 12 for heating; since the liquid is preliminarily heated in the preheater 11, the liquid flowing into the reboiler 2 has relatively uniform heat and high temperature, and is not easy to form the fouling on the inner wall of the reboiler 2; the liquid in the reboiler 2 is heated by the steam for the second time, and then the gas-liquid mixture flows to the rectifying tower 1 through the liquid return pipe 8. Whether the preheater 11 is used or not can be determined by the staff according to the specific conditions and the liquid composition.

[0028] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A system for reducing fouling and extending the life cycle of a reboiler, the system comprising: It includes: rectifying tower (1) and reboiler (2); the bottom of the rectifying tower (1) is connected with one end of the total pipe (3), the other end of the total pipe (3) is connected with one end of branch pipe one (4) and branch pipe two (5), the other end of the branch pipe one (4) and the branch pipe two (5) are connected with the liquid inlet of the reboiler (2), and the branch pipe one (4) and the branch pipe two (5) are respectively provided with control valves (6), the branch pipe two (5) is provided with a power pump (7), and the power pump (7) is located at the rear side of the control valve (6); the gas-liquid outlet of the reboiler (2) is connected with the middle part of the rectifying tower (1) through a liquid return pipe (8).

2. The system of claim 1, wherein: The reboiler (2) is provided with a liquid level sensor (9).

3. The system of claim 1, wherein: The branch pipe two (5) is connected with one end of the branch pipe (10), the other end of the branch pipe (10) is connected with the inlet of the preheater (11), the outlet of the preheater (11) is connected with the liquid inlet of the reboiler (2) through a liquid outlet pipe (12); The branch pipe (10) and the branch pipe two (5) at the rear side of the branch pipe (10) are respectively provided with control valves (6).

4. The system of claim 1, wherein: The reboiler (2) is provided with an ultrasonic generator.

5. The system of claim 1, wherein: The reboiler (2) is provided with a thermometer (13).

6. The system of claim 1, wherein: The liquid return pipe (8) is provided with a pressure gauge (14) and a flowmeter.

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