Top heat exchanger of petrochemical fractionating tower

Abstract

The utility model provides a tower top heat exchanger of a petrochemical fractionating tower, and mainly relates to the technical field of fractionating towers. A petrochemical fractionating tower top heat exchanger comprises a fractionating tower body, a supporting frame is fixedly arranged on the outer ring of the fractionating tower body, a shell is arranged in the supporting frame in a sliding mode, a circulating inlet is fixedly formed in the bottom of the shell, a steam outlet is fixedly formed in the top of the fractionating tower body, and the circulating inlet is formed in the steam outlet. A heat exchange pipe is fixedly arranged in the shell, clamping blocks are symmetrically arranged at the positions, close to the bottom, of the supporting frame, and the two clamping blocks abut against the outer ring of the fractionating tower body. The device has the advantages that the supporting frame is fixed to the tower top through the clamping blocks connected to the two sides in a threaded mode, and the device can be detached conveniently to be cleaned or repaired; and the shell moves downwards to apply pressure to the gasket, gaps at the connecting position are filled, the sealing performance is guaranteed, and petroleum steam leakage is prevented.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of fractionation towers, in particular to a petrochemical fractionation tower top heat exchanger. Background Art

[0002] A fractionation tower is a tower-type vapor-liquid device for distillation, also known as a distillation tower. In petrochemical industry, fractionation towers are often used to evaporate and stratify oil, and they play an important role in petrochemical production engineering. At present, a heat exchanger is usually installed on the top of the fractionation tower to condense oil vapor. During use, since oil is relatively viscous, there will be residues attached to the heat exchanger, which will reduce the efficiency of the heat exchanger over a long period of time. The existing heat exchangers are fixed to the top of the tower with bolts, etc., which is not convenient for disassembly, replacement and cleaning; at the same time, the sealing of the connection between the heat exchanger and the top of the tower is poor. For this reason, the present application proposes a heat exchanger at the top of a petrochemical fractionation tower. Utility Model Content

[0003] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0004] A petrochemical fractionation tower top heat exchanger comprises a fractionation tower body, a support frame is fixedly arranged on the outer ring of the fractionation tower body, a shell is slidably arranged inside the support frame, a circulation inlet is fixedly arranged at the bottom of the shell, a steam outlet is fixedly arranged on the top of the fractionation tower body, the circulation inlet is arranged inside the steam outlet, a heat exchange tube is fixedly arranged inside the shell, and clamping blocks are symmetrically arranged near the bottom of the support frame, and two of the clamping blocks are in contact with the outer ring of the fractionation tower body.

[0005] A first screw is fixedly arranged on the top of the shell, and the top of the support frame is rotatably connected to a first hand wheel. The first screw passes through the top of the support frame and is threadedly connected to the first hand wheel. Slide blocks are symmetrically fixedly arranged on the outer ring of the shell, and a slide groove is opened on the inner side of the support frame.

[0006] The circulation inlet is arranged in a conical shape, and the outer ring of the circulation inlet is abutted with a gasket, the gasket abuts against the inner wall of the steam outlet and is clamped at the top, the inner ring of the gasket is arranged in a conical shape, a guard ring is fixedly arranged at the bottom of the shell, the inner ring of the guard ring is arranged in a stepped shape, the guard ring abuts against the outer ring of the steam outlet, and the outer ring of the shell is fixedly provided with a circulation outlet.

[0007] The two clamping blocks are arranged in an arc shape, and second screws are fixedly arranged on the outer rings of the two clamping blocks. Second hand wheels are rotatably connected to both sides of the support frame, and the second screws pass through the support frame and are threadedly connected to the corresponding second hand wheels.

[0008] The outlet end and the inlet end of the heat exchange tube both pass through the side wall of the shell, and the heat exchange tube is arranged in a spiral shape.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model has a simple structure and is easy to install and use. After installation, the shell can be better fixed on the top of the distillation tower to ensure the safe operation of the equipment; the support frame is fixed on the top of the tower by clamping blocks connected by threads on both sides, which is convenient for disassembling the device for cleaning or repair; the shell moves downward to apply pressure to the gasket, fills the gap at the connection, ensures the sealing, and prevents the leakage of oil vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0012] Attached Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0013] Attached Figure 3 It is a structural schematic diagram of the utility model from a second viewing angle.

[0014] Numbers shown in the accompanying drawings: 1, distillation tower body; 101, steam outlet; 2, support frame; 201, slide; 3, shell; 301, circulation inlet; 302, first screw; 303, circulation outlet; 304, guard ring; 4, heat exchange tube; 5, clamping block; 501, second screw; 6, first hand wheel; 7, gasket; 8, second hand wheel. DETAILED DESCRIPTION

[0015] The utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by this application.

[0016] In conjunction with the accompanying drawings, a petrochemical distillation tower top heat exchanger includes a distillation tower body 1, a support frame 2 is fixedly arranged on the outer ring of the distillation tower body 1, a shell 3 is slidably arranged inside the support frame 2, a circulation inlet 301 is fixedly arranged at the bottom of the shell 3, a steam outlet 101 is fixedly arranged on the top of the distillation tower body 1, the circulation inlet 301 is arranged inside the steam outlet 101, a heat exchange tube 4 is fixedly arranged inside the shell 3, clamping blocks 5 are symmetrically arranged near the bottom of the support frame 2, two of the clamping blocks 5 are abutted against the outer ring of the distillation tower body 1, and the high-temperature steam in the distillation tower body 1 enters the shell 3 through the circulation inlet 301 and contacts with the heat exchange tube 4, so that the heat exchange medium in the heat exchange tube 4 exchanges heat with the high-temperature steam.

[0017] The first screw rod 302 is fixedly arranged on the top of the shell 3, and the top of the support frame 2 is rotatably connected to the first hand wheel 6. The first screw rod 302 passes through the top of the support frame 2 and is threadedly connected to the first hand wheel 6. Slide blocks are symmetrically fixedly arranged on the outer ring of the shell 3, and a slide groove 201 is opened on the inner side of the support frame 2. The slide block is slidably connected to the inner wall of the slide groove 201. This structural design drives the shell 3 to move up and down.

[0018] The circulation inlet 301 is arranged in a conical shape, and the outer ring of the circulation inlet 301 is abutted with a gasket 7, and the gasket 7 abuts against the inner wall of the steam outlet 101 and is clamped at the top. The inner ring of the gasket 7 is arranged in a conical shape, and a protective ring 304 is fixedly arranged at the bottom of the shell 3. The inner ring of the protective ring 304 is arranged in a stepped shape, and the protective ring 304 abuts against the outer ring of the steam outlet 101. This structural arrangement ensures sealing to prevent leakage of petroleum vapor. The outer ring of the shell 3 is fixedly provided with a circulation outlet 303, and the circulation outlet 303 is connected to an external condensation device.

[0019] The two clamping blocks 5 are arranged in an arc shape, and the outer circles of the two clamping blocks 5 are fixedly provided with second screws 501. The two sides of the support frame 2 are rotatably connected with second hand wheels 8. The second screws 501 pass through the support frame 2 and are threadedly connected with the corresponding second hand wheels 8. The clamping blocks 5 are driven to move by rotating the second hand wheels 8, thereby fixing the support frame 2 on the distillation tower body 1.

[0020] The outlet end and the inlet end of the heat exchange tube 4 both pass through the side wall of the shell 3 and are respectively connected to the inlet and outlet of the external circulating water source. The heat exchange tube 4 is arranged in a spiral shape.

[0021] When the device is in use, it is placed on the top of the distillation tower body 1 so that the circulation inlet 301 is inserted into the steam outlet 101, and the second hand wheels 8 on both sides are rotated to drive the two clamping blocks 5 to move toward the middle and abut against the outer ring of the distillation tower body 1, thereby fixing the support frame 2 on the top of the distillation tower body 1, and the first hand wheel 6 is rotated to drive the shell 3 to move downward, and the circulation inlet 301 applies force to the gasket 7, thereby filling the gap between the circulation inlet 301 and the steam outlet 101 to prevent steam leakage at the connection; when cleaning and maintaining the device, the first hand wheel 6 and the second hand wheel 8 are loosened in turn to remove the device from the top of the distillation tower body 1.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A petrochemical fractionation tower top heat exchanger, comprising a fractionation tower body (1), characterized in that: A support frame (2) is fixedly arranged on the outer ring of the distillation tower body (1), a shell (3) is slidably arranged inside the support frame (2), a circulation inlet (301) is fixedly arranged at the bottom of the shell (3), a steam outlet (101) is fixedly arranged on the top of the distillation tower body (1), the circulation inlet (301) is arranged inside the steam outlet (101), a heat exchange tube (4) is fixedly arranged inside the shell (3), and clamping blocks (5) are symmetrically arranged near the bottom of the support frame (2), and two of the clamping blocks (5) are in contact with the outer ring of the distillation tower body (1).

2. A petrochemical fractionation tower top heat exchanger according to claim 1, characterized in that: A first screw rod (302) is fixedly arranged on the top of the shell (3), and the top of the support frame (2) is rotatably connected to a first hand wheel (6). The first screw rod (302) passes through the top of the support frame (2) and is threadedly connected to the first hand wheel (6). Slide blocks are symmetrically fixedly arranged on the outer ring of the shell (3), and a slide groove (201) is opened on the inner side of the support frame (2).

3. A petrochemical fractionation tower top heat exchanger according to claim 1, characterized in that: The circulation inlet (301) is arranged in a conical shape, the outer ring of the circulation inlet (301) is abutted with a gasket (7), the gasket (7) abuts against the inner wall of the steam outlet (101) and is clamped at the top, the inner ring of the gasket (7) is arranged in a conical shape, a guard ring (304) is fixedly arranged at the bottom of the shell (3), the inner ring of the guard ring (304) is arranged in a stepped shape, the guard ring (304) abuts against the outer ring of the steam outlet (101), and the outer ring of the shell (3) is fixedly arranged with a circulation outlet (303).

4. A petrochemical fractionation tower top heat exchanger according to claim 1, characterized in that: The two clamping blocks (5) are arranged in an arc shape, and the outer rings of the two clamping blocks (5) are fixedly provided with second screw rods (501). The two sides of the support frame (2) are rotatably connected with second hand wheels (8), and the second screw rods (501) pass through the support frame (2) and are threadedly connected with the corresponding second hand wheels (8).

5. A petrochemical fractionation tower top heat exchanger according to claim 1, characterized in that: The outlet end and the inlet end of the heat exchange tube (4) both pass through the side wall of the shell (3), and the heat exchange tube (4) is arranged in a spiral shape.

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