Fractionating tower reboiler

Abstract

The utility model discloses a fractionating tower reboiler. The fractionating tower reboiler comprises a cylindrical shell, a backflow pipe and a liquid inlet pipe are arranged at the lower end of the outer side face of the cylindrical shell, a steam outlet pipe and a pressure relief pipe are arranged at the upper end of the outer side face of the cylindrical shell, a heat insulation plate is arranged at the left end of the inner side face of the cylindrical shell and divides the left end of the interior of the cylindrical shell into a backflow chamber, the backflow chamber is communicated with the backflow pipe, and an outer cover is installed at the right end of the cylindrical shell. A hot water inlet pipe and a cold water outlet pipe are arranged at the upper end and the lower end of the outer side face of the outer cover respectively, an independent water inlet cabin and an independent water outlet cabin are arranged in the outer cover, water inlet pipe bundles and water outlet pipe bundles are installed at the upper end and the lower end of the outer side face of the circular sealing cover plate respectively, and the end of each water inlet pipe bundle is connected with the end of one water outlet pipe bundle. According to the fractionating tower reboiler, the heat exchange tube bundle and the reboiler shell are designed in a split mode, when the heat exchange tube bundle needs to be cleaned, only the old heat exchange tube bundle needs to be taken down and replaced with the cleaned standby heat exchange tube bundle, and the use efficiency of the reboiler can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of petrochemical equipment, and in particular to a distillation tower reboiler. Background Art

[0002] Reboiler (also called reboiler) is one of the commonly used equipment in chemical process, which is often used together with fractionation tower and usually installed near the bottom of fractionation tower. The liquid phase at the bottom of the tower enters the reboiler through the bottom pipeline of the tower, and usually 25% to 30% of the liquid phase is vaporized in the reboiler. The vaporized two-phase flow is sent back to the fractionation tower, and the gas phase component in the return tower passes upward through the tower plate, while the liquid phase component falls back to the bottom of the tower, thereby realizing the heating and circulation of the bottom liquid.

[0003] In chemical enterprises, reboilers are mostly shell and tube heat exchangers. When in use, hot water flows through the tube bundle to heat the propane and propylene in the shell. Since there are salt impurities in the water in the tube bundle, the inner wall of the tube bundle will be scaled after long-term use. If it is not cleaned in time, it will seriously affect the heat exchange efficiency. The existing reboiler tube bundle and the reboiler shell are mostly welded together. When the tube bundle needs to be cleaned, it can only be cleaned online. The online cleaning time is long, which will seriously affect the normal operation of the reboiler. Summary of the invention

[0004] The present application provides a distillation tower reboiler, in which a heat exchange tube bundle and a reboiler shell are designed to be split. When the heat exchange tube bundle needs to be cleaned, it is only necessary to remove the old heat exchange tube bundle and replace it with a cleaned heat exchange tube bundle, which can effectively improve the use efficiency of the reboiler and effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a distillation tower reboiler, comprising a cylindrical shell; a reflux pipe and a liquid inlet pipe are provided at the lower end of the outer side surface of the cylindrical shell, a steam outlet pipe and a pressure relief pipe are provided at the upper end of the outer side surface of the cylindrical shell, an insulation board is provided at the left end of the inner side surface of the cylindrical shell, the insulation board isolates the left end of the inner part of the cylindrical shell into a reflux chamber, the reflux chamber is communicated with the reflux pipe, an outer cover is installed at the right end of the cylindrical shell, a hot water inlet pipe and a cold water outlet pipe are respectively provided at the upper and lower ends of the outer side surface of the outer cover, the right end of the cylindrical shell is sealed and connected with a circular sealing cover plate by bolts, a sealing partition is provided in the middle of the outer side surface of the circular sealing cover plate, the sealing partition divides the outer cover into an independent water inlet compartment and a water outlet compartment, and an inlet pipe bundle and an outlet pipe bundle are respectively installed at the upper and lower ends of the outer side surface of the circular sealing cover plate, and the end of each inlet pipe bundle is connected to the end of an outlet pipe bundle.

[0006] Preferably, a liquid level sensor 1 and a liquid level sensor 2 are respectively provided on the upper and lower sides of the left end of the outer side surface of the cylindrical shell.

[0007] Preferably, the pressure relief pipe includes a guide tube, which is communicated with the cylindrical shell through a stepped hole, a sealing cover plate is tightly pressed on the step of the stepped hole, and the sealing cover plate is connected to the guide tube through a strong spring.

[0008] Preferably, both the reflux pipe and the liquid inlet pipe are equipped with electrically controlled valves.

[0009] Preferably, an annular sleeve is provided on a side of the outer side of the circular sealing cover plate close to the cylindrical shell, and the annular sleeve is sleeved with the inner side of the cylindrical shell.

[0010] Compared with the prior art, the beneficial effects of this application are:

[0011] 1. The reboiler of the fractionation tower adopts a split design for the heat exchange tube bundle and the reboiler shell. When the heat exchange tube bundle needs to be cleaned, just remove the old heat exchange tube bundle and replace it with a cleaned spare heat exchange tube bundle, which can effectively improve the use efficiency of the reboiler;

[0012] 2. The liquid to be heated enters the interior of the cylindrical shell through the liquid inlet pipe, and the hot water enters the water inlet tank through the hot water inlet pipe. The hot water in the water inlet tank is diverted and enters the water inlet pipe bundle. The hot water in the water inlet pipe bundle flows back to the water outlet tank through the water outlet pipe bundle, and is finally discharged through the cold water outlet pipe on the water outlet tank. The liquid to be heated contacts the water inlet pipe bundle and the water outlet pipe bundle, and the steam generated after the liquid boils is discharged through the steam outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of this application;

[0014] Figure 2 This is the main cross-sectional view of this application;

[0015] Figure 3 This is a right side cross-sectional view of this application;

[0016] Figure 4 It is a schematic diagram of the structure of the pressure relief pipe.

[0017] In the figure: 1 liquid level sensor 1, 2 liquid level sensor 2, 3 reflux pipe, 4 cylindrical shell, 5 liquid inlet pipe, 6 cold water outlet pipe, 7 hot water inlet pipe, 8 outer cover, 9 steam outlet pipe, 10 pressure relief pipe, 101 guide tube, 102 strong spring, 103 sealing cover plate, 104 stepped hole, 11 insulation board, 12 water inlet pipe bundle, 13 annular sleeve, 14 water outlet pipe bundle, 15 circular sealing cover plate, 16 sealing partition. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In the description of this application, if the orientation description is involved, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the attached Figure 2 The orientation or position relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present application. When a feature is referred to as being "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0020] See also Figure 1-4 The present application provides the following technical solutions: a fractionation tower reboiler, comprising a cylindrical shell 4; a reflux pipe 3 and a liquid inlet pipe 5 are provided at the lower end of the outer side surface of the cylindrical shell 4, a steam outlet pipe 9 and a pressure relief pipe 10 are provided at the upper end of the outer side surface of the cylindrical shell 4, and a heat insulation board 11 is provided at the left end of the inner side surface of the cylindrical shell 4, and the heat insulation board 11 isolates the left end of the inner side of the cylindrical shell 4 into a reflux chamber, and the reflux chamber is connected to the reflux pipe 3, and an outer cover 8 is installed at the right end of the cylindrical shell 4, and the outer surface of the outer cover 8 is provided. A hot water inlet pipe 7 and a cold water outlet pipe 6 are respectively provided at the lower two ends. The right end of the cylindrical shell 4 is sealed and connected with a circular sealing cover plate 15 by bolts. A sealing partition 16 is provided in the middle of the outer side surface of the circular sealing cover plate 15. The sealing partition 16 divides the outer cover 8 into independent water inlet compartments and water outlet compartments. The upper and lower ends of the outer side surface of the circular sealing cover plate 15 are respectively installed with an inlet pipe bundle 12 and an outlet pipe bundle 14. The end of each inlet pipe bundle 12 is connected to the end of an outlet pipe bundle 14.

[0021] Specifically, the liquid to be heated enters the interior of the cylindrical shell 4 through the liquid inlet pipe 5, the hot water enters the water inlet tank through the hot water inlet pipe 7, the hot water in the water inlet tank is diverted into the water inlet pipe bundle 12, the hot water in the water inlet pipe bundle 12 flows back to the water outlet tank through the water outlet pipe bundle 14, and is finally discharged through the cold water outlet pipe 6 on the water outlet tank. The liquid to be heated contacts the water inlet pipe bundle 12 and the water outlet pipe bundle 14, and the steam generated after the liquid boils is discharged through the steam outlet pipe 9.

[0022] Furthermore, a liquid level sensor 1 and a liquid level sensor 2 are respectively provided on the upper and lower sides of the left end of the outer side surface of the cylindrical shell 4.

[0023] Specifically, liquid level sensor 1 and liquid level sensor 2 are used to detect the liquid level in the reflux chamber. When the liquid level reaches liquid level sensor 1, the electric control valve on the reflux pipe 3 opens and the reflux pipe 3 discharges liquid. When the liquid level reaches liquid level sensor 2, the electric control valve on the reflux pipe 3 closes.

[0024] Furthermore, the pressure relief pipe 10 includes a guide tube 101 , which is communicated with the cylindrical shell 4 through a stepped hole 104 . A sealing cover plate 103 is tightly pressed on the step of the stepped hole 104 , and the sealing cover plate 103 is connected to the guide tube 101 through a strong spring 102 .

[0025] Specifically, when the pressure in the cylindrical housing 4 is too high due to pipeline blockage, the high-pressure gas pushes the sealing cover plate 103 open, and the pressure is released through the pressure relief pipe 10 .

[0026] Furthermore, both the reflux pipe 3 and the liquid inlet pipe 5 are installed with electrically controlled valves.

[0027] Specifically, the electrically controlled valve is used to control the opening and closing of the reflux pipe 3 and the liquid inlet pipe 5 .

[0028] Furthermore, an annular sleeve 13 is provided on the outer side of the circular sealing cover plate 15 close to the cylindrical shell 4 , and the annular sleeve 13 is sleeved with the inner side of the cylindrical shell 4 .

[0029] Specifically, the annular sleeve 13 is inserted into the cylindrical shell 4 to support the tube bundle.

[0030] When in use: the propane and propylene mixture enters the interior of the cylindrical shell 4 through the liquid inlet pipe 5, and the hot water enters the water inlet pipe bundle 12 and the water outlet pipe bundle 14 through the hot water inlet pipe 7. The water inlet pipe bundle 12 and the water outlet pipe bundle 14 are immersed in the liquid to be heated, and the steam generated after the liquid boils is discharged through the steam outlet pipe 9.

[0031] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fractionation tower reboiler, characterized in that: The invention comprises a cylindrical shell (4); a return pipe (3) and a liquid inlet pipe (5) are provided at the lower end of the outer side surface of the cylindrical shell (4); a steam outlet pipe (9) and a pressure relief pipe (10) are provided at the upper end of the outer side surface of the cylindrical shell (4); a heat insulation board (11) is provided at the left end of the inner side surface of the cylindrical shell (4); the heat insulation board (11) isolates the left end of the inner part of the cylindrical shell (4) into a return chamber; the return chamber is communicated with the return pipe (3); an outer cover (8) is installed at the right end of the cylindrical shell (4); and hot water outlet pipes (9) are provided at the upper and lower ends of the outer side surface of the outer cover (8). A water inlet pipe (7) and a cold water outlet pipe (6) are provided, and the right end of the cylindrical shell (4) is sealed and connected to a circular sealing cover plate (15) through bolts. A sealing partition plate (16) is provided in the middle of the outer side surface of the circular sealing cover plate (15). The sealing partition plate (16) divides the outer cover (8) into an independent water inlet compartment and a water outlet compartment. The upper and lower ends of the outer side surface of the circular sealing cover plate (15) are respectively installed with a water inlet pipe bundle (12) and a water outlet pipe bundle (14), and the end of each water inlet pipe bundle (12) is connected to the end of an outlet pipe bundle (14).

2. A fractionation tower reboiler according to claim 1, characterized in that: A liquid level sensor 1 (1) and a liquid level sensor 2 (2) are respectively provided on the upper and lower sides of the left end of the outer side surface of the cylindrical housing (4).

3. A fractionation tower reboiler according to claim 1, characterized in that: The pressure relief pipe (10) comprises a flow guide tube (101), the flow guide tube (101) being in communication with the cylindrical housing (4) via a stepped hole (104), a sealing cover plate (103) being tightly pressed on the step of the stepped hole (104), and the sealing cover plate (103) being connected to the flow guide tube (101) via a strong spring (102).

4. A fractionation tower reboiler according to claim 1, characterized in that: The reflux pipe (3) and the liquid inlet pipe (5) are both equipped with electric control valves.

5. A fractionation tower reboiler according to claim 1, characterized in that: An annular sleeve (13) is provided on the outer side of the circular sealing cover plate (15) close to the cylindrical shell (4), and the annular sleeve (13) is sleeved with the inner side of the cylindrical shell (4).

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