Heat exchanger structure of single cracking furnace

Abstract

The utility model relates to the technical field of quenching heat exchangers, in particular to a single cracking furnace heat exchanger structure which comprises a barrel-shaped shell, the barrel-shaped shell comprises a material changing cavity and a heat exchange cavity, a partition plate is fixedly installed in the middle of the barrel-shaped shell, a plurality of heat exchange insertion plates are inserted in the heat exchange cavity in a linear array mode, and channels are formed between the adjacent heat exchange insertion plates. The adjacent channels are arranged to be a medium flow channel and a refrigerant flow channel respectively, the two ends of the refrigerant flow channel are fixedly connected with sealing plates, circulation openings are formed in the positions, close to the two ends of the refrigerant flow channel, of the cylindrical shell, and a reversing end is installed at the end, away from the material changing cavity, of the heat exchange cavity and communicates with the two heat exchange cavity spaces. The heat exchange cavity is divided into the medium flow channels and the refrigerant flow channels by arranging the heat exchange insertion plates, the heat exchange insertion plates form the rectangular space, the heat exchange area of high-temperature pyrolysis gas and refrigerants is increased, the heat exchange insertion plates form a plurality of channels, and the influence on the flow speed is reduced.

Description

Technical Field

[0001] This application relates to the technical field of quench heat exchangers, and particularly to a heat exchanger structure for a single cracking furnace. Background Art

[0002] A single cracking furnace is a device used to carry out cracking reactions on hydrocarbons. During the cracking reaction in the cracking furnace, high-temperature cracking gas is generated, and it is necessary to rapidly cool the high-temperature cracking gas through a quench heat exchanger to reduce secondary reactions and thus reduce the loss of target olefins.

[0003] Currently, the main types of heat exchangers for single cracking furnaces are tubular heat exchangers and plate heat exchangers. Among them, the tubular heat exchanger has a large flow rate but a low heat exchange efficiency, while the plate heat exchanger has a high heat exchange efficiency but a small flow rate. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a heat exchanger structure for a single cracking furnace that can increase the flow rate and improve the heat exchange efficiency.

[0005] The above application purpose of this application is achieved through the following technical solutions:

[0006] A heat exchanger structure for a single cracking furnace, comprising:

[0007] A cylindrical shell, the cylindrical shell includes a material-changing chamber and a heat exchange chamber;

[0008] A partition plate, the partition plate is fixedly installed in the middle of the cylindrical shell, evenly dividing the material-changing chamber and the heat exchange chamber, and two material-changing chambers are respectively provided with a feed inlet and a discharge outlet;

[0009] Heat exchange inserts, a plurality of heat exchange inserts are linearly arrayed and inserted into the heat exchange chamber, and the heat exchange inserts are perpendicular to the partition plate;

[0010] A medium flow channel and a refrigerant flow channel, channels are formed between adjacent heat exchange inserts, and adjacent channels are respectively set as a medium flow channel and a refrigerant flow channel;

[0011] Sealing plates, the two ends of the refrigerant flow channel are fixedly connected with the sealing plates, and circulation ports are opened at positions of the cylindrical shell close to the two ends of the refrigerant flow channel;

[0012] A commutation end head, the commutation end head is installed at one end of the heat exchange chamber far from the material-changing chamber, and the commutation end head communicates the spaces of the two heat exchange chambers;

[0013] Among them, connection flanges are fixedly installed at the circulation port, the feed inlet and the discharge outlet.

[0014] Optionally, a plurality of baffle plates are installed in the refrigerant flow channel.

[0015] Optionally, the closing plate and the heat exchange insertion plate are integrated. A sealing plate is provided at the bottom of the refrigerant flow channel of the heat exchange insertion plate, and both sides of the cylindrical shell are provided with detachable sealing covers.

[0016] Optionally, a telescopic joint is provided between the side of the heat exchange insertion plate close to the partition plate and the heat exchange insertion plate after installation.

[0017] Optionally, the upper side of the heat exchange insertion plate is fixedly connected to the same grid plate, and the grid plate is hermetically connected to the side surface of the cylindrical shell.

[0018] Optionally, the reversing end is bolted to the cylindrical shell.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] By providing the heat exchange insertion plate to divide the heat exchange cavity into a medium flow channel and a refrigerant flow channel, the high-temperature pyrolysis gas and the refrigerant flow through the medium flow channel and the refrigerant flow channel in adjacent channels. The heat exchange insertion plate forms a rectangular space, increasing the heat exchange area between the high-temperature pyrolysis gas and the refrigerant. The heat exchange insertion plate forms multiple channels, reducing the influence of the plate heat exchanger on the flow rate.

[0021] A plurality of baffle plates are installed in the refrigerant flow channel, so that the refrigerant flows in an S shape in the refrigerant flow channel along the baffle plates, filling the space of the refrigerant flow channel with the refrigerant as much as possible, improving the contact with the high-temperature pyrolysis gas, and thus improving the utilization efficiency of the refrigerant.

[0022] After long-term use, it is necessary to clean the inside of the heat exchanger, especially the channels through which the medium and the refrigerant flow. By integrally setting the closing plate and the heat exchange insertion plate and providing a sealing plate, it is convenient to take out the heat exchange insertion plate part from the position of the sealing cover for cleaning, and it is also convenient to clean the inside of the cylindrical shell. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0024] Figure 2 is the structural schematic diagram of the heat exchange cavity part of the embodiment of the present application.

[0025] Reference numerals: 1, cylindrical shell; 11, charging cavity; 111, feeding port; 112, discharging port; 113, circulation port; 12, heat exchange cavity; 13, sealing cover;

[0026] 2, partition plate;

[0027] 31, heat exchange insertion plate; 311, medium flow channel; 312, refrigerant flow channel; 313, baffle plate; 32, closing plate; 33, grid plate;

[0028] 4. Commutation end Specific embodiments

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Please refer to Figure 1 and Figure 2 , which is a single cracking furnace heat exchanger structure disclosed in the embodiments of the present application, including a cylindrical shell 1. The cylindrical shell 1 includes a material-changing chamber 11 and a heat exchange chamber 12. A partition plate 2 is fixedly installed in the middle of the cylindrical shell 1. The partition plate 2 evenly divides the material-changing chamber 11 and the heat exchange chamber 12. An inlet 111 and an outlet 112 are respectively arranged in the two material-changing chambers 11. A plurality of heat exchange inserts 31 are inserted in a linear array in the heat exchange chamber 12. The heat exchange inserts 31 are perpendicular to the partition plate 2. Channels are formed between adjacent heat exchange inserts 31. The adjacent channels are respectively set as a medium flow channel 311 and a refrigerant flow channel 312. Both ends of the refrigerant flow channel 312 are fixedly connected with a closing plate 32. Circulation ports 113 are opened at positions of the cylindrical shell 1 near both ends of the refrigerant flow channel 312. A commutation end 4 is installed at one end of the heat exchange chamber 12 away from the material-changing chamber 11. The commutation end 4 communicates the spaces of the two heat exchange chambers 12. Connecting flanges are fixedly installed at the circulation ports 113, the inlet 111 and the outlet 112.

[0031] Specifically, the inlet 111 and the outlet 112 are arranged on both sides of one end of the cylindrical shell 1, and the space is separated by the partition plate 2, so that the medium flows in a U shape in the cylindrical shell 1. Heat exchange inserts 31 are arranged in the heat exchange chamber 12. The heat exchange inserts 31 are divided into a medium flow channel 311 and a refrigerant flow channel 312 through the arrangement of the circulation ports 113 and the closing plates 32, so that the medium flows along the cylindrical shell 1 from the inlet 111 to the outlet 112, and the refrigerant circulates through the circulation ports 113 along the refrigerant flow channel 312.

[0032] In this way, by arranging the heat exchange inserts 31 to divide the heat exchange chamber 12 into a medium flow channel 311 and a refrigerant flow channel 312, the high-temperature cracking gas and the refrigerant flow in adjacent channels through the medium flow channel 311 and the refrigerant flow channel 312. The heat exchange inserts 31 form a rectangular space, increasing the heat exchange area between the high-temperature cracking gas and the refrigerant. The heat exchange inserts 31 form a plurality of channels, reducing the influence of the plate heat exchanger on the flow rate.

[0033] In some feasible ways, the cylindrical shell 1 is rectangular cylindrical, the partition plate 2 and the heat exchange insertion plate 31 are both rectangular plates. The side of the charging cavity 11 is provided with a feeding port 111 and a discharging port 112. Two circulation ports 113 are provided on both sides of the heat exchange cavity 12, and the two circulation ports 113 are used for circulating the refrigerant. The reversing end 4 is in the shape of a U-shaped shell. The high-temperature pyrolysis gas enters the part of the heat exchange cavity 12 near the discharging port 112 from the reversing end 4 after passing through the part of the heat exchange cavity 12 near the feeding port 111. The arrangement of the two groups of refrigerant flow channels 312 enables the high-temperature pyrolysis gas to be cooled twice separately, further accelerating its cooling speed and improving the cooling effect.

[0034] As a specific implementation manner of a single cracking furnace heat exchanger structure provided by the application, a plurality of baffle plates 313 are installed in the refrigerant flow channel 312.

[0035] Overall, installing a plurality of baffle plates 313 in the refrigerant flow channel 312 enables the refrigerant to flow in an S shape in the refrigerant flow channel 312 along the baffle plates 313, making the space in the refrigerant flow channel 312 as full of refrigerant as possible, improving the contact with the high-temperature pyrolysis gas, and thus improving the utilization efficiency of the refrigerant.

[0036] In some feasible ways, the baffle plate 313 is in the shape of a rectangular plate, and openings are provided on different sides of adjacent baffle plates 313, enabling the refrigerant to flow from one side of the refrigerant flow channel 312 to the other side as much as possible and filling the space of the refrigerant flow channel 312.

[0037] As another specific implementation manner of a single cracking furnace heat exchanger structure provided by the application, the closing plate 32 and the heat exchange insertion plate 31 are integrated. A sealing plate is provided at the bottom of the refrigerant flow channel 312 of the heat exchange insertion plate 31, and both sides of the cylindrical shell 1 are provided with detachable sealing covers 13.

[0038] Combined with the specific use scenario, after long-term use, it is necessary to clean the inside of the heat exchanger, especially the channels through which the medium and the refrigerant flow. By integrally setting the closing plate 32 and the heat exchange insertion plate 31 and providing a sealing plate, it is convenient to take out the part of the heat exchange insertion plate 31 from the position of the sealing cover 13 for cleaning, and at the same time, it is also convenient to clean the inside of the cylindrical shell 1.

[0039] Further, a telescopic joint is provided between the side of the heat exchange insertion plate 31 close to the partition plate 2 after the heat exchange insertion plate 31 is installed and the heat exchange insertion plate 31.

[0040] It should be understood that there are two kinds of media, hot and cold, in the heat exchanger. During use, the heat exchange insertion plate 31 may expand and contract due to the temperature difference. By providing a telescopic joint, a certain space is provided for its change.

[0041] Further, the upper side of the heat exchange insertion plate 31 is fixedly connected to the same grid plate 33, and the grid plate 33 is hermetically connected to the side of the cylindrical shell 1.

[0042] It should be understood that by setting the grid plate 33 to connect the heat exchange insertion plates 31 of the same group, the heat exchange insertion plates can be integrally taken out from the position of the sealing cover plate 13, further improving the convenience during cleaning and maintenance.

[0043] Furthermore, the reversing end 4 is bolted to the cylindrical shell 1.

[0044] It should be understood that by bolt-connecting the reversing end 4, the convenience during cleaning and maintenance is further improved.

[0045] In some feasible ways, the closing plate 32, the heat exchange insertion plate 31, and the sealing plate form a rectangular box-shaped grid plate 33 which is installed at the opening end of the rectangular box. The blank space of the grid plate 33 faces the opening. Rectangular openings are provided at both ends of the sealing cover plate 13, and the rectangular opening positions are set as circulation ports 113. The grid plate 33 is placed on the cylindrical shell 1, and the sealing cover plate 13 is placed on the grid plate 33, and they are hermetically connected to each other in pairs and fixed by bolts.

[0046] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A single cracking furnace heat exchanger structure, characterized in that: include: A cylindrical shell (1), wherein the cylindrical shell (1) comprises a material exchange chamber (11) and a heat exchange chamber (12); A partition plate (2), the partition plate (2) being fixedly mounted in the middle of the cylindrical shell (1) and equally dividing the material exchange chamber (11) and the heat exchange chamber (12), the two material exchange chambers (11) being respectively provided with a material inlet (111) and a material outlet (112); A heat exchange plug plate (31), wherein a plurality of the heat exchange plug plates (31) are inserted into the heat exchange cavity (12) in a linear array, and the heat exchange plug plates (31) are perpendicular to the partition plate (2); A medium flow channel (311) and a refrigerant flow channel (312), wherein channels are formed between adjacent heat exchange plug plates (31), and the adjacent channels are respectively configured as the medium flow channel (311) and the refrigerant flow channel (312); A closing plate (32), the closing plate (32) being fixedly connected at both ends of the refrigerant flow channel (312), and a circulation port (113) being provided in the cylindrical shell (1) at positions close to both ends of the refrigerant flow channel (312); a reversing end head (4), the reversing end head (4) being installed at one end of the heat exchange chamber (12) away from the material exchange chamber (11), the reversing end head (4) being in communication with the two spaces of the heat exchange chamber (12); The circulation port (113), the material inlet (111) and the material outlet (112) are all fixedly mounted with connecting flanges.

2. A single cracking furnace heat exchanger structure according to claim 1, characterized in that: A plurality of baffles (313) are installed in the refrigerant flow channel (312).

3. The single cracking furnace heat exchanger structure according to claim 1, characterized in that: The closing plate (32) is integrated with the heat exchange plug plate (31); a sealing plate is provided at the bottom of the refrigerant flow channel (312) of the heat exchange plug plate (31); and removable sealing cover plates (13) are provided on both sides of the cylindrical shell (1).

4. A single cracking furnace heat exchanger structure according to claim 3, characterized in that: After the heat exchange plug plate (31) is installed, an expansion joint is provided between the side of the heat exchange plug plate (31) close to the partition plate (2).

5. The single cracking furnace heat exchanger structure according to claim 3, characterized in that: The upper side of the heat exchange plug plate (31) is fixedly connected to the same grid plate (33), and the grid plate (33) is sealedly connected to the side of the cylindrical shell (1).

6. The single cracking furnace heat exchanger structure according to claim 3, characterized in that: The reversing end head (4) is bolted to the cylindrical housing (1).

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