Tower top heat exchanger convenient to disassemble, assemble and maintain

Abstract

The utility model provides a tower top heat exchanger convenient to disassemble, assemble and maintain, which comprises a shell, a water inlet arranged at the lower part of the shell, a water outlet arranged at the upper part of the shell, an upper tube plate arranged at the top end of the shell, a lower tube plate arranged at the bottom end of the shell, a heat exchange tube arranged between the upper tube plate and the lower tube plate, and a baffle plate arranged in the shell, a first butt joint ring is arranged at the top end of the fractionating tower body, a limiting groove is formed in the upper portion of the first butt joint ring, a second butt joint ring is arranged on the outer edge of the lower pipe plate, a limiting block matched with the limiting groove is arranged at the bottom of the second butt joint ring, and two sets of symmetrically-arranged U-shaped buckle devices are installed on the second butt joint ring. The [-shaped ring buckle device comprises a first ring arm and a second ring arm, one end of the first ring arm is rotatably connected with one end of the second ring arm, the other end of the first ring arm is rotatably connected with the second butt joint ring, and a bolt hole is formed in the other end of the second ring arm; and the height of the inner frame of the [-shaped buckle device is slightly higher than the thickness of the first butt joint ring and the second butt joint ring after the first butt joint ring and the second butt joint ring are meshed and mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of fractionation towers, in particular to a tower top heat exchanger which is easy to disassemble, assemble and maintain. Background Art

[0002] The distillation tower is a kind of equipment widely used in the field of petrochemical industry. It is mainly used to separate and purify petroleum to prepare products suitable for various purposes. The top heat exchanger is an important component of the existing distillation tower. The top heat exchanger can recover the heat of the material steam, cool and condense the steam at the top of the distillation tower, and convert the steam into liquid by condensation for reflux in the tower. It has the functions of improving energy utilization efficiency, reducing production costs, improving product quality and improving production stability.

[0003] Due to the complex composition of petroleum, some heavy hydrocarbon compounds in it have a large viscosity and a certain stickiness in their vapor. Therefore, after a long period of operation in the distillation tower, the steam will form various adhesions such as scaling, carbon deposits and oil stains on the heat exchange tube walls of the heat exchanger. These adhesions will not only affect the heat transfer efficiency of the heat exchanger, reduce its cooling and condensation effects, but also lead to a series of problems such as equipment pressure drop / increase, energy consumption and material consumption increase. Therefore, the top heat exchanger of the distillation tower needs to be disassembled regularly for cleaning and maintenance.

[0004] In the prior art, the top heat exchanger of the distillation tower is mainly installed by welding, bolting, etc. The top heat exchanger installed by welding is not conducive to disassembly and maintenance, while the heat exchanger installed by bolts will cause wear of the holes during repeated disassembly and assembly, resulting in increased maintenance costs. In addition, there are many bolts and the workload of disassembly and assembly is large. At the same time, since the heat exchanger is large in size and heavy in weight, the holes need to be aligned during installation, which makes the installation process inconvenient. Therefore, it is necessary to provide a top heat exchanger that is easy to disassemble and maintain. Utility Model Content

[0005] The utility model provides a tower top heat exchanger which is easy to disassemble and maintain, so as to solve the problem that the tower top heat exchanger of the fractionating tower in the prior art is not conducive to repeated disassembly and assembly, reduce the complicated work of equipment disassembly and assembly, and facilitate equipment maintenance.

[0006] The utility model is realized through the following technical solutions:

[0007] A tower top heat exchanger convenient for disassembly and maintenance, comprising a fractionating tower body and a tower top heat exchanger. The tower top heat exchanger includes a shell. An inlet is provided at the lower part of the shell, and a drain is provided at the upper part of the shell. An upper tube sheet is provided at the top end of the shell, and a lower tube sheet is provided at the bottom end of the shell. Heat exchange tubes are arranged between the upper tube sheet and the lower tube sheet. Baffle plates are arranged in the shell. A first docking ring is provided at the top end of the fractionating tower body, and a limiting groove is provided above the first docking ring. A second docking ring is provided at the outer edge of the lower tube sheet, and a limiting block matching the limiting groove is provided at the bottom of the second docking ring. Two groups of symmetrically arranged U-shaped ring buckle devices are installed on the second docking ring. The U-shaped ring buckle device includes a first ring arm and a second ring arm. One end of the first ring arm is rotatably connected to one end of the second ring arm, and the other end of the first ring arm is rotatably connected to the second docking ring. A pin hole is provided at the other end of the second ring arm. The inner frame height of the U-shaped ring buckle device is slightly higher than the thickness after the first docking ring and the second docking ring are meshed and installed.

[0008] The limiting groove is a trapezoidal groove, and the limiting block is an inverted trapezoidal block matching the trapezoidal groove.

[0009] Through holes corresponding to the pin holes are provided on the first docking ring and the second docking ring. The U-shaped ring buckle device is provided with a double-rod pin penetrating through the pin hole and the through hole.

[0010] Rubber rollers with an outer diameter slightly higher than the thickness of the frame plate are provided on the upper frame plate and the lower frame plate of the first ring arm and the second ring arm.

[0011] The connecting end of the first ring arm and the second docking ring is connected through a first rotating shaft, and the connecting end of the first ring arm and the second ring arm is connected through a second rotating shaft.

[0012] Openings capable of accommodating the second rotating shaft are provided on both sides of the first docking ring and the second docking ring.

[0013] There are two baffle plates, which are arranged opposite to each other left and right.

[0014] At least four fixed-distance tubes with the same height are provided at the top of the lower tube sheet, and the two baffle plates are respectively installed at the top end and the middle part of the fixed-distance tubes.

[0015] The limiting groove and the limiting block provided by the utility model can cooperate with each other. During installation, the tower top heat exchanger can be more directly aligned with the holes of the fractionating tower body through the meshing of the limiting groove and the limiting block, reducing the installation error. The U-shaped ring buckle device provided by the utility model is used to replace the traditional welding and bolt fixing methods of the tower top heat exchanger of the fractionating tower. The fixed installation of the tower top heat exchanger can be realized through the buckling of the first ring arm and the second ring arm, reducing the disassembly and assembly workload and the wear of the equipment during disassembly and assembly. At the same time, the U-shaped ring buckle devices are all replaceable parts, and can be directly replaced when worn during use. Description of the Drawings

[0016] Figure 1 Schematic diagram of the external structure of the present utility model;

[0017] Figure 2 Schematic diagram of the disassembled structure of the present utility model;

[0018] Figure 3 Schematic diagram of the buckled state of the U-shaped ring buckle device of the present utility model;

[0019] Figure 4 Schematic diagram of the opened state of the U-shaped ring buckle device of the present utility model;

[0020] Figure 5 Schematic diagram of the structure of the U-shaped ring buckle device of the present utility model;

[0021] Figure 6 Schematic diagram of the installation of the baffle plate of the present utility model.

[0022] In the figure: 100 - fractionating tower, 110 - first docking ring, 111 - limiting groove, 200 - top tower heat exchanger, 210 - housing, 211 - baffle plate, 212 - spacer tube, 220 - water inlet, 230 - water outlet, 240 - upper tube sheet, 250 - lower tube sheet, 251 - second docking ring, 252 - limiting block, 300 - U-shaped ring buckle device, 310 - first ring arm, 320 - second ring arm, 321 - pin hole, 330 - double-rod pin, 340 - rubber roller. Detailed implementation manners

[0023] For the convenience of those skilled in the art to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] As Figure 1 、 2 shown, a top tower heat exchanger convenient for disassembly and maintenance includes a fractionating tower 100 tower body and a top tower heat exchanger 200. The top tower heat exchanger 200 includes a housing 210. A water inlet 220 is provided at the lower part of the housing 210, and a water outlet 230 is provided at the upper part of the housing 210. When the equipment is working, the water inlet 220 is externally connected to a cooling water source, and the cooling water flows into the heat exchanger housing 210 through the water inlet 220 for cooling, and then flows out through the water outlet 230 to take away heat. An upper tube sheet 240 is provided at the top end of the housing 210, a lower tube sheet 250 is provided at the bottom end of the housing 210, and a heat exchange tube 260 is provided between the upper tube sheet 240 and the lower tube sheet 250. When the fractionating tower 100 is working, the material steam rises into the heat exchange tube 260, and the cooling water enters the housing 210 to cool the heat exchange tube 260. The heat exchange tube 260 exchanges heat with the material steam to condense it, thereby achieving the purpose of heat exchange.

[0025] As Figure 6As shown in the figure, there are two baffle plates 211 provided inside the housing 210, which are arranged opposite to each other left and right. At least four spacing tubes 212 with the same height are provided at the top of the lower tube sheet 250. The two baffle plates 211 are respectively installed at the top end and the middle part of the spacing tubes 212. The baffle plates 211 can support the heat exchange tubes 260 in the heat exchanger, playing a stabilizing effect. At the same time, when the cooling water flows in the heat exchanger, the baffle plates 211 can lengthen the flow path of the cooling water, reduce the formation of flow dead zones, and improve the heat exchange effect.

[0026] As Figure 1 , 2 As shown in the figure, a first docking ring 110 is provided at the top end of the tower body of the fractionating tower 100. A limiting groove 111 is provided above the first docking ring 110. An outer edge of the lower tube sheet 250 of the top tower heat exchanger 200 is provided with a second docking ring 251. A limiting block 252 matching the limiting groove 111 is provided at the bottom of the second docking ring 251. The limiting groove 111 is a trapezoidal groove, and the limiting block 252 is an inverted trapezoidal block matching the trapezoidal groove. When the top tower heat exchanger 200 is installed, the limiting groove 111 and the limiting block 252 are engaged with each other, so that the top tower heat exchanger 200 can be quickly and accurately placed at the installation position and the installation stability is improved. At the same time, the inclination angles on both sides of the trapezoidal groove and the inverted trapezoidal block enable the two to be engaged simply and quickly.

[0027] As Figure 2 , 3 As shown in Figures 4 and 5, two sets of symmetrically arranged U-shaped ring buckle devices 300 are installed on the second docking ring 251. The U-shaped ring buckle devices 300 are used to fix the installation of the top tower heat exchanger 200. The U-shaped buckles are conducive to buckling on the first docking ring 110 and the second docking ring 251. The U-shaped ring buckle device 300 includes a first ring arm 310 and a second ring arm 320. One end of the first ring arm 310 is rotatably connected to one end of the second ring arm 320. The other end of the first ring arm 310 is rotatably connected to the second docking ring 251. The connecting end of the first ring arm 310 and the second docking ring 251 is connected through a first rotating shaft. The connecting end of the first ring arm 310 and the second ring arm 320 is connected through a second rotating shaft. When the top tower heat exchanger 200 is placed on the top of the fractionating tower 100, the first docking ring 110 and the second docking ring 251 are engaged and aligned. The first ring arm 310 is rotated inward and buckled on the first docking ring 110 and the second docking ring 251. Then the second ring arm 320 is rotated inward, and the second ring arm 320 is buckled on the first docking ring 110 and the second docking ring 251. The two sets of U-shaped ring buckle devices 300 form a ring buckle surrounding the first docking ring 110 and the second docking ring 251, playing a role in fixing the installation.

[0028] As Figure 2 , 3As shown in Fig. 4, openings for accommodating the second rotating shaft are provided on both sides of the first docking ring 110 and the second docking ring 251, preventing the first docking ring 110 and the second docking ring 251 from blocking the rotating shaft when the U-shaped ring buckle device 300 is buckled, resulting in the inability to buckle. A pin hole 321 is provided at the other end of the second ring arm 320. Through holes are provided on the first docking ring 110 and the second docking ring 251 corresponding to the pin hole 321. The U-shaped ring buckle device 300 is provided with a double-rod pin 330 passing through the pin hole 321 and the through hole. After the double-rod pin 330 is inserted, the second ring arm 320 cannot be opened, locking both ends of the U-shaped ring buckle device 300 and ensuring the installation stability. The inner frame height of the U-shaped ring buckle device 300 is slightly higher than the thickness after the first docking ring 110 and the second docking ring 251 are meshed and installed, preventing the friction force between the U-shaped ring buckle device 300 and the surface of the equipment docking ring from being too large, resulting in difficulty in disassembly after installation. Rubber rollers 340 with an outer diameter slightly higher than the thickness of the frame plate are provided on the upper frame plate and the lower frame plate of the first ring arm 310 and the second ring arm 320. When installing and disassembling, the U-shaped ring buckle device 300 can be easily buckled on the equipment docking ring through the rubber rollers 340. At the same time, the rubber rollers 340 can prevent the problem of unstable installation caused by play. The outer diameter of the rubber rollers 340 is slightly larger, generating a relative pressure on the first docking ring 110 and the second docking ring 251 after installation, improving the tightness and stability of the installation.

[0029] Installation process: Place the top tower heat exchanger 200 on the top of the tower body of the fractionating tower 100. The U-shaped ring buckle device 300 is in an open state. After roughly aligning the limit groove 111 and the limit block 252, lower the top tower radiator. The limit groove 111 and the limit block 252 are meshed. At this time, the hole positions of the top tower heat exchanger 200 and the fractionating tower 100 are automatically aligned. Subsequently, first buckle the first ring arm 310 of the U-shaped ring buckle device 300, then buckle the second ring arm 320, and finally insert the double-rod pin 330 to lock the U-shaped ring buckle device 300. The equipment installation is completed. The installation process is simple and fast, without the need to carefully align the equipment, saving installation time. At the same time, the U-shaped ring buckle device 300 has a simple structure, which is convenient for production, replacement and maintenance, reducing the maintenance cost.

[0030] The above embodiments are the preferred implementation modes of the present invention, and are not intended to limit the present invention. Without departing from the inventive concept of the present invention, any obvious replacement is within the protection scope of the present invention.

Claims

1. A tower top heat exchanger that is easy to disassemble and maintain, comprising a distillation tower (100) tower body and a tower top heat exchanger (200), characterized in that: The top heat exchanger (200) includes a housing (210). A water inlet (220) is provided at the lower part of the housing (210), a drain outlet (230) is provided at the upper part of the housing (210), an upper tube sheet (240) is provided at the top end of the housing (210), a lower tube sheet (250) is provided at the bottom end of the housing (210), heat exchange tubes (260) are provided between the upper tube sheet (240) and the lower tube sheet (250), a baffle plate (211) is provided inside the housing (210). At the top end of the tower body of the fractionating tower (100), there is a first docking ring (110), and a limiting groove (111) is provided above the first docking ring (110). An outer edge of the lower tube sheet (250) is provided with a second docking ring (251), and a limiting block (252) matching the limiting groove (111) is provided at the bottom of the second docking ring (251). Two groups of symmetrically arranged U-shaped ring buckle devices (300) are installed on the second docking ring (251). The U-shaped ring buckle device (300) includes a first ring arm (310) and a second ring arm (320). One end of the first ring arm (310) is rotatably connected to one end of the second ring arm (320), the other end of the first ring arm (310) is rotatably connected to the second docking ring (251), and a pin hole (321) is provided at the other end of the second ring arm (320). The inner frame height of the U-shaped ring buckle device (300) is slightly higher than the thickness after the first docking ring (110) and the second docking ring (251) are meshed and installed.

2. The tower top heat exchanger that is easy to disassemble and maintain according to claim 1 is characterized in that: The limiting groove (111) is a trapezoidal groove, and the limiting block (252) is an inverted trapezoidal block matching the trapezoidal groove.

3. The tower top heat exchanger that is easy to disassemble and maintain according to claim 2 is characterized in that: Through holes corresponding to the pin hole (321) are provided on both sides of the first docking ring (110) and the second docking ring (251). The U-shaped ring buckle device (300) is provided with a double-rod pin (330) passing through the pin hole (321) and the through holes.

4. The tower top heat exchanger that is easy to disassemble and maintain according to claim 3 is characterized in that: Rubber rollers (340) with an outer diameter slightly higher than the thickness of the frame plate are provided on the upper frame plate and the lower frame plate of the first ring arm (310) and the second ring arm (320).

5. The tower top heat exchanger that is easy to disassemble and maintain according to claim 4 is characterized in that: The connecting end of the first ring arm (310) and the second docking ring (251) is connected through a first rotating shaft, and the connecting end of the first ring arm (310) and the second ring arm (320) is connected through a second rotating shaft.

6. The tower top heat exchanger that is easy to disassemble and maintain according to claim 5, characterized in that: Openings capable of accommodating the second rotating shaft are provided on both sides of the first docking ring (110) and the second docking ring (251).

7. The tower top heat exchanger that is easy to disassemble and maintain according to claim 6, characterized in that: There are two baffle plates (211), which are arranged opposite to each other left and right.

8. The tower top heat exchanger that is easy to disassemble and maintain according to claim 7 is characterized in that: At least four spacing tubes (212) with the same height are provided at the top of the lower tube sheet (250), and the two baffle plates (211) are respectively installed at the top end and the middle part of the spacing tubes (212).

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