Heat treatment device for shell ring near skirt of hydrogenation reactor

Abstract

The invention discloses a hydrogenation reactor near-skirt shell section heat treatment device, the near-skirt shell section comprises a connecting shell section and an end socket which are connected with each other, the connecting shell section is a shell section between a shell body and a skirt surface of a hydrogenation reactor, the device comprises cables, the cables comprise a first cable and a second cable, the first cable is wound on the connecting shell section, and the second cable is wound on the connecting shell section; the second cable is wound on a part of the outer surface of the sealing head from the skirt surface; the second cable fixer comprises a plurality of fixed flexible pipes, the plurality of fixed flexible pipes are uniformly distributed on the second cable in a radial pattern and are used for fixing the second cable, each fixed flexible pipe is coplanar with one axial surface of the hydrogenation reactor cylinder, one end of each fixed flexible pipe is connected with the skirt surface, and the other end of each fixed flexible pipe is connected with the boss of the hydrogenation reactor; the power supply comprises a first power supply and a second power supply; and the thermal insulation layer is laid between the hydrogenation reactor and the cable. According to the heat treatment device, temperature uniformity in heat treatment is achieved, the cable fixing problem in the actual operation process is solved, and the heating effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of local heat treatment and temperature uniformity control, and in particular to a heat treatment device for a cylinder section near a skirt of a hydrogenation reactor. Background Art

[0002] The hydrogenation process has been applied in industry since 1927. The crude oil is hydrogenated at about 175-455°C in the presence of catalyst and high-pressure hydrogen. Hydrocarbons are converted into low molecular weight products in the presence of high-pressure hydrogen and catalyst. The role of the hydrogenation reactor in the hydrogenation process is to provide a place for the crude oil and hydrogen to react in the presence of catalyst and certain temperature and pressure conditions.

[0003] With the booming development of tens of millions of tons of oil refining and millions of tons of ethylene, the specifications, structures and systems of hydrogenation reactors are becoming more and more complex. At present, the outer diameter of the largest hydrogenation reactor in my country has reached 6517 mm and the wall thickness is 352 mm! The larger the outer diameter and the thicker the wall, the more complex the structure, which puts higher requirements on its manufacturing, supervision, inspection, maintenance, upkeep and repair.

[0004] In terms of local heat treatment, traditional heating methods can no longer meet the needs of heat treatment. At the same time, traditional methods, such as cassette furnaces, cause serious environmental pollution. Induction heating local heat treatment, as a new type of heat treatment method, has many advantages such as cleanliness, economy and energy saving, easy automation control, good temperature uniformity, etc. It has greatly solved the problem of temperature control accuracy in local heat treatment of large-scale thick-walled containers.

[0005] However, induction heating is rarely used in the chemical industry and lacks theoretical design support. The realization of temperature uniformity requires continuous adjustment of the cable turn spacing based on real-time data. Once the structure is complex, the cable winding method is also a problem.

[0006] If local heat treatment is to be performed at the cylinder and the head of the hydrogenation reactor, that is, the cylinder section near the skirt, it is too close to the edge of the cylinder, and the heating belt specified in the standard exceeds the actual length, making it difficult to meet the heat treatment requirements. In addition, due to the change in radius at the head, it is also difficult to fix the cable, which will also affect the heating effect during actual operation.

[0007] Based on this technical background, the present invention studies a heat treatment device for the cylinder section near the skirt of a hydrogenation reactor.

[0008] In order to solve the above problems, the present invention intends to set an auxiliary heating belt at the end cap to supplement the length of the heating belt, meet the heat treatment requirements, and achieve its temperature uniformity. In addition, due to the change in radius at the end cap, the cable layout is also difficult. The present invention intends to design a set of heating tooling suitable for induction heating at the end cap to achieve its heating effect. Summary of the invention

[0009] In view of the deficiencies in the prior art, the present invention proposes a heat treatment device for the cylinder section near the skirt of a hydrogenation reactor, in which a first cable is wound around the connecting cylinder section, and a second cable is wound from the skirt surface around a portion of the outer surface of the head, so as to meet the heat treatment requirements and achieve temperature uniformity during the heat treatment; at the same time, the second cable fixer solves the cable fixing problem during actual operation and ensures the heating effect.

[0010] In order to achieve the above-mentioned object, the present invention provides a heat treatment device for the cylinder segment near the skirt of a hydrogenation reactor, wherein the cylinder segment near the skirt comprises a connecting cylinder segment and a head connected to each other, wherein the connecting cylinder segment is a cylinder segment between the cylinder body and the skirt surface of the hydrogenation reactor, and the device comprises:

[0011] The cable comprises a first cable and a second cable, wherein the first cable is wound around the connecting tube section, and the second cable is wound from the skirt surface around a part of the outer surface of the sealing head;

[0012] A second cable fixture, comprising a plurality of fixed flexible tubes, the plurality of fixed flexible tubes are radially distributed on the second cable and used to fix the second cable, each fixed flexible tube being coplanar with an axial surface of the hydrogenation reactor cylinder, and having one end connected to the skirt seat surface and the other end connected to the boss of the hydrogenation reactor;

[0013] A power source, comprising a first power source and a second power source, wherein the first power source is electrically connected to the first cable, and the second power source is electrically connected to the second cable;

[0014] The thermal insulation layer is laid between the hydrogenation reactor and the cable.

[0015] The effects of the present invention are:

[0016] (1) The heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed in the present invention winds the first cable around the connecting cylinder section, and the second cable is wound from the skirt surface around a part of the outer surface of the head, so as to meet the heat treatment requirements and realize the temperature uniformity during the heat treatment; at the same time, the second cable fixer solves the cable fixing problem in the actual operation process and ensures the heating effect.

[0017] (2) The heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed in the present invention divides the cylinder section near the skirt into a connecting cylinder section and a sealing head. By accurately calculating the winding width of the second cable, an average maximum temperature difference of about 10°C is achieved for the cylinder section near the skirt, and the insulation temperature difference is less than 10°C, which is far less than the required ±14°C, thereby solving the problem that the local heat treatment requirements cannot be met near the skirt of the hydrogenation reactor.

[0018] (3) In the heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed in the present invention, a plurality of fixed flexible tubes are evenly distributed on the second cable in a radial shape, and can be bent to adapt to the structural requirements of the head; one end of each fixed flexible tube is adsorbed on the skirt surface through a cylindrical skirt magnet, and the other end is adsorbed on the outer plate surface of a clamping plate through a boss magnet, so as to effectively fix the cables wound on different head radii; at the same time, the magnetism of the skirt magnet and the boss magnet can be the same or different, so that the method of fixing the cables with multiple fixed flexible tubes is more flexible.

[0019] (4) In the heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed in the present invention, each fixed flexible tube is provided with a plurality of cable clamping units for clamping the second cable. When all the cable clamping units on the plurality of fixed flexible tubes clamp the second cable, the spacing between the turns of the second cable can be flexibly adjusted by a cylindrical clamping ring sleeved on the outer surface of the fixed flexible tube.

[0020] (5) The heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed in the present invention achieves flexible clamping according to the diameter of the second cable by matching the external thread on the outer surface of the cylindrical clamp ring with the internal thread on the inner surface of the annular fixing ring.

[0021] (6) In the heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed by the present invention, the inner plate surface of each clamping plate fits the boss to fix it, and the other end surface absorbs a boss magnet, which solves the problem that the contact area between the outer arc structure of the boss and the magnet is too small to fix the flexible tube.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0024] Figure 1 The present invention provides a schematic structural diagram of a cylinder segment near the skirt of a hydrogenation reactor in a heat treatment device for a cylinder segment near the skirt of a hydrogenation reactor.

[0025] Figure 2 for Figure 1 A partial enlarged view of the structural schematic diagram of the cylinder section near the skirt of the medium hydrogenation reactor.

[0026] Figure 3 This is a schematic diagram of the head geometry calculation for the winding width of the second cable of the cylinder section heat treatment device near the skirt of the hydrogenation reactor proposed by the present invention.

[0027] Figure 4 This is a schematic diagram of the overall structure of the heat treatment device for the cylinder section near the skirt of the hydrogenation reactor proposed by the present invention.

[0028] Figure 5 The present invention is a schematic front view of the structure of one end of a fixed flexible tube near the skirt seat of a second cable fixture in the heat treatment device for the cylinder segment near the skirt seat of a hydrogenation reactor proposed by the present invention.

[0029] Figure 6 The present invention provides a schematic three-dimensional structure of one end of a fixed flexible tube near the skirt seat of a second cable fixture in a heat treatment device for a cylinder segment near the skirt seat of a hydrogenation reactor proposed by the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the portion near the boss of the second cable fixture in the cylinder segment heat treatment device near the skirt of the hydrogenation reactor proposed by the present invention.

[0031] Figure 8 The present invention is a partial cross-sectional schematic diagram of the portion near the boss of the second cable fixture in the cylinder segment heat treatment device near the skirt of the hydrogenation reactor proposed by the present invention.

[0032] Description of reference numerals:

[0033] 1-cylinder body, 2-connecting cylinder section, 3-head, 4-first cable, 5-second cable, 6-skirt magnet, 7-flexible tube, 8-boss, 9-fastening bolt, 10-fixing ring, 11 clamping plate, 12-boss magnet.

[0034] 101-clamping ring, 102-fixing ring. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0036] In the present invention, unless otherwise specified, directional words such as "upper" and "lower" generally refer to the upper and lower parts of a device in normal use. Figure 1 In the drawing direction, "inside" and "outside" refer to the outline of the device. In addition, the terms "first, second, third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first, second, third" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] The present invention provides a heat treatment device for the cylinder section near the skirt of a hydrogenation reactor, such as Figures 1 to 8 As shown, the cylinder section near the skirt seat includes a connecting cylinder section 2 and a head 3 connected to each other. The connecting cylinder section 2 is the cylinder section between the cylinder 1 and the skirt seat surface of the hydrogenation reactor. The device includes:

[0038] Cables, including a first cable 4 and a second cable 5, wherein the first cable 4 is wound around the connecting tube section 2, and the second cable 5 is wound around a portion of the outer surface of the end cap 3 from the skirt surface;

[0039] The second cable fixture comprises a plurality of fixed flexible tubes 7, which are evenly distributed on the second cable 5 in a radial shape and are used to fix the second cable 5, each fixed flexible tube 7 is coplanar with an axial surface of the hydrogenation reactor cylinder 1, and one end of each fixed flexible tube 7 is connected to the skirt seat surface, and the other end is connected to the boss 8 of the hydrogenation reactor;

[0040] A power supply, including a first power supply and a second power supply, the first power supply is electrically connected to the first cable 4, and the second power supply is electrically connected to the second cable 5;

[0041] The insulation layer is laid between the hydrogenation reactor and the cable.

[0042] In the present invention, the first cable 4 is wound on the connecting cylinder section 2, and the second cable 5 is wound from the skirt surface on a portion of the outer surface of the head 3, so as to meet the heat treatment requirements and realize the temperature uniformity during the heat treatment; at the same time, the second cable fixer solves the cable fixing problem in the actual operation process and ensures the heating effect.

[0043] Preferably, the first cable 4 is spirally and evenly wound on the connecting cylinder section 2, and the second cable 5 is spirally and evenly wound on a part of the outer surface of the head 3 from the skirt seat surface;

[0044] The winding width of the first cable 4 is the width of the connecting barrel section 2;

[0045] The winding width of the second cable 5 is the distance between the plane where the end point of the second cable 5 is wound on a part of the outer surface of the sealing head 3 and the plane where the skirt surface is located.

[0046] According to the present invention, the plane where the skirt seat surface is located is perpendicular to the axis of the cylinder 1;

[0047] The plane where the end point of the second cable 5 wound around a portion of the outer surface of the sealing head 3 is located is perpendicular to the axis of the cylinder 1 .

[0048] According to the present invention, the winding width of the second cable 5 is calculated by the following steps:

[0049] (1) Calculate the winding width of the heating cable of cylinder 1 according to the following formula:

[0050] Wp=(6-8)·m·δ1;

[0051] (2) Calculate the winding width of the additional heating cable required for the cylinder 1 according to the following formula:

[0052]

[0053] (3) Calculate the volume of the head 3 that needs to be supplemented with heating according to the following formula:

[0054] V=Wp 补 *π(R 2 -(R-δ1) 2 );

[0055] (4) Calculate the winding width of the second cable 5 according to the following formula:

[0056]

[0057] Among them, the value of m is 1-3, Wp is the winding width of the heating cable of the cylinder 1, Hr is the width of the connecting cylinder section 2, Wp 补 is the winding width of the additional heating cable required for the cylinder 1, V is the volume required for additional heating at the head 3, R is the outer diameter of the cylinder 1, R1 is the outer diameter of the bottom surface of the head 3, H1 is the vertical distance from the vertex of the outer surface of the head 3 to the plane where the skirt surface is located, H is the winding width of the second cable 5, δ1 is the wall thickness of the cylinder 1, and δ2 is the wall thickness of the head 3;

[0058] The bottom surface of the head 3 is coplanar with the skirt surface.

[0059] In the present invention, the cylinder section near the skirt is divided into a connecting cylinder section 2 and a sealing head 3. By accurately calculating the winding width of the second cable 5, an average maximum temperature difference of about 10°C is achieved in the cylinder section near the skirt, and the insulation temperature difference is lower than 10°C, which is far less than the required ±14°C, thereby solving the problem that the local heat treatment requirements cannot be met near the skirt of the hydrogenation reactor.

[0060] According to a preferred embodiment of the present invention, the winding turn spacing of the second cable 5 is calculated according to the following formula:

[0061]

[0062] Among them, X1 is the winding turn spacing of the first cable 4, and X2 is the winding turn spacing of the first cable 4.

[0063] Preferably, the second cable fixture further comprises a fixing ring 10 and a plurality of clamping plates 11;

[0064] The fixing ring 10 is in the shape of a circular ring, and a plurality of through holes are evenly distributed on the end surface of the circular ring;

[0065] Each clamping plate 11 is in the shape of a long strip, and a bolt hole is arranged on one end surface thereof;

[0066] A plurality of clamping plates 11 are evenly distributed and fixed on one end surface of the fixing ring 10 and are surrounded into a cylindrical shape;

[0067] The inner surface of the cylinder surrounded by the plurality of clamping plates 11 is fitted and fastened to the outer surface of the boss 8 .

[0068] According to the present invention, each clamping plate 11 is fixed to the fixing ring 10 by a fastening bolt 9, and a fastening bolt 9 passes through a through hole of the fixing ring 10 and is connected to a bolt hole of the clamping plate 11;

[0069] The inner surface of each clamping plate 11 is fitted and fastened to the outer surface of the boss 8;

[0070] The inner plate surface of each clamping plate 11 is located on the inner surface of the cylinder surrounded by the plurality of clamping plates 11 .

[0071] Preferably, one end of each fixed flexible tube 7 is connected to one end surface of the cylindrical skirt magnet 6, and the other end is connected to one end surface of the cylindrical boss magnet 12;

[0072] The other end surface of the skirt seat magnet 6 is adsorbed on the skirt seat surface, and the other end surface of the boss magnet 12 is adsorbed on the outer plate surface of a clamping plate 11;

[0073] The magnetic properties of the skirt magnet 6 and the boss magnet 12 may be the same or different.

[0074] In the present invention, multiple fixed flexible tubes 7 are radially distributed on the second cable 5, and can be bent to adapt to the structural requirements of the head 3; one end of each fixed flexible tube 7 is adsorbed on the skirt surface through a cylindrical skirt magnet 6, and the other end is adsorbed on the outer plate surface of a clamping plate 11 through a boss magnet 12, so as to effectively fix the cables wound on different radii of the head 3; at the same time, the magnetism of the skirt magnet 6 and the boss magnet 12 can be the same or different, so that the method of fixing the cables with multiple fixed flexible tubes 7 is more flexible.

[0075] According to a preferred embodiment of the present invention, each fixed flexible tube 7 is provided with a plurality of cable clamping units, and the plurality of cable clamping units are used to clamp the second cable 5;

[0076] Each cable clamping unit includes a clamping ring 101 and a pair of fixing rings 102;

[0077] The clamping ring 101 is cylindrical, and its outer surface is provided with external threads, and is sleeved on the outer surface of the fixed flexible pipe 7;

[0078] Each fixing ring 102 is in the shape of a torus, and an internal thread is provided on its inner surface;

[0079] A pair of fixing rings 102 are sleeved on the clamping ring 101 and are independently rotated on the external threads of the clamping ring 101 through internal threads, so as to adjust the relative distance according to the diameter of the second cable 5 to clamp the second cable 5 .

[0080] In the present invention, each fixed flexible tube 7 is provided with a plurality of cable clamping units for clamping the second cable 5. When all the cable clamping units on the plurality of fixed flexible tubes 7 clamp the second cable 5, the spacing between the turns of the second cable 5 can be flexibly adjusted by a cylindrical clamping ring 101 sleeved on the outer surface of the fixed flexible tube 7.

[0081] In the present invention, the external thread on the outer surface of the cylindrical clamping ring 101 cooperates with the internal thread on the inner surface of the annular fixing ring 102 , thereby achieving flexible clamping according to the diameter of the second cable 5 .

[0082] Preferably, the number of the plurality of fixed flexible tubes 7 is equal to the number of the plurality of clamping plates 11;

[0083] The number of the plurality of through holes of the fixing ring 10 is equal to the number of the plurality of clamping plates 11;

[0084] The end surface diameter of the boss magnet 12 is not greater than the width of the outer surface of one clamping plate 11 .

[0085] In the present invention, the inner plate surface of each clamping plate 11 fits the boss 8 to fix it, and the other end surface absorbs a boss magnet 12, which solves the problem that the contact surface between the outer arc structure of the boss 8 and the magnet is too small to fix the flexible tube 7.

[0086] The present invention is described in more detail below through a specific embodiment.

[0087] Example 1

[0088] In this embodiment, local heat treatment is performed on the weld position of the connecting cylinder section 2 of a hydrogenation reactor. The outer diameter of the cylinder 1 is R=2261.5mm, the outer diameter of the bottom surface of the head 3 is R1=2422mm, the width of the connecting cylinder section 2 is Hr=332mm, the vertical distance from the vertex of the outer surface of the head 3 to the plane where the skirt seat surface is located is H1=2282.5mm, the wall thickness of the cylinder 1 is δ1=261.5mm, the wall thickness of the head 3 is δ2=160mm, Wp is the winding width of the heating cable of the cylinder 1, Wp 补 is the winding width of the cylinder 1 that requires additional heating cable, V is the volume that requires additional heating at the head 3, and H is the winding width of the second cable 5.

[0089] like Figures 1 to 8This embodiment provides a heat treatment device for the cylinder section near the skirt of a hydrogenation reactor. The cylinder section near the skirt includes a connecting cylinder section 2 and a head 3 connected to each other. The connecting cylinder section 2 is a cylinder section between the cylinder 1 and the skirt surface of the hydrogenation reactor. The device includes:

[0090] The cable comprises a first cable 4 and a second cable 5. The first cable 4 is spirally and evenly wound on the connecting cylinder section 2, and the second cable 5 is spirally and evenly wound on a part of the outer surface of the head 3 from the skirt seat surface;

[0091] The second cable fixture comprises a plurality of fixed flexible tubes 7, eight of which are radially distributed on the second cable 5 and are used to fix the second cable 5, each of which is coplanar with an axial surface of the hydrogenation reactor cylinder 1, and one end of which is connected to the skirt seat surface and the other end is connected to the boss 8 of the hydrogenation reactor;

[0092] A power supply, including a first power supply and a second power supply, the first power supply is electrically connected to the first cable 4, and the second power supply is electrically connected to the second cable 5;

[0093] Insulation layer, laid between the hydrogenation reactor and the cable;

[0094] like Figure 4 As shown, eight fixed flexible tubes 7 are used to fix the second cable 5 at 12 o'clock, 1.5 o'clock, 3 o'clock, 4.5 o'clock, 6 o'clock, 7.5 o'clock, 9 o'clock, and 10.5 o'clock of the sealing head 3;

[0095] The winding width of the first cable 4 is the width of the connecting barrel section 2;

[0096] The winding width of the second cable 5 is the distance between the plane where the end point of the second cable 5 is wound on the partial outer surface of the end cap 3 and the plane where the skirt surface is located;

[0097] The plane where the skirt seat surface is located is perpendicular to the axis of the cylinder 1;

[0098] The plane where the end point of the second cable 5 is wound around a portion of the outer surface of the end cap 3 is located is perpendicular to the axis of the cylinder 1;

[0099] The winding width of the second cable 5 is calculated by the following steps:

[0100] (1) Calculate the winding width of the heating cable of cylinder 1 according to the following formula:

[0101] Wp=(6-8)·m·δ1;

[0102] For the weld position of the connecting cylinder section 2, local heat treatment is performed. The winding width of the cylinder 1 heating cable is determined according to CSTM group standard T / CSTM 00546-2021 "Heat Treatment Procedure for Local Weld Thickness of Pressure Equipment" 5.2.3 c;

[0103] For the wall thickness of cylinder 1 δ1=261.5mm>70mm, when medium frequency induction heating is adopted, the minimum winding width of the heating cable of cylinder 1 is

[0104] Wp=6*1*261.5=1569mm

[0105] Among them, the coefficient 6-8 takes the minimum value of 6, the value of m is 1, the calculation result is rounded up, and Wp takes 1600mm. At this time, the cable winding width on one side of the hydrogenation reactor near the skirt needs to be 800mm, while the width of the connecting cylinder section 2 Hr=332mm, which cannot meet its requirements. Therefore, it is necessary to set an auxiliary heating belt at the head 3, that is, the winding width H of the second cable 5.

[0106] (2) Calculate the winding width of the additional heating cable required for the cylinder 1 according to the following formula:

[0107]

[0108] (3) Calculate the volume of the head 3 that needs to be supplemented with heating according to the following formula:

[0109] V=Wp 补 *π(R 2 -(R-δ1) 2 )=468*π*(2261.5 2 -(2261.5-261.5) 2 )=

[0110] 1.638*10 9 mm 3 ;

[0111] (4) Calculate the winding width of the second cable 5 according to the following formula:

[0112]

[0113] Substituting R1, H1, δ2 and V, we get H = 760.5 mm, rounded to 760 mm;

[0114] The bottom surface of the head 3 is coplanar with the skirt surface;

[0115] The winding turn spacing of the first cable 4 is approximately 50 mm according to the actual hydrogenation reactor structure, heat treatment requirements, and material engineering;

[0116] The winding turn spacing of the second cable 5 is calculated according to the following formula:

[0117]

[0118] Among them, X1 is the winding turn spacing of the first cable 4, and X2 is the winding turn spacing of the first cable 4; the first cable 4 is wound on the connecting cylinder section 2 at a turn spacing of 50mm; the second cable 5 is wound on the outer surface of the head 3 at a winding width of 760mm and a turn spacing of 80mm;

[0119] The second cable fixture for fixing the second cable 5 further comprises a fixing ring 10 and eight clamping plates 11;

[0120] The fixing ring 10 is in the shape of a circular ring, and a plurality of through holes are evenly distributed on the end surface of the circular ring;

[0121] Each clamping plate 11 is in the shape of a long strip, and a bolt hole is arranged on one end surface thereof;

[0122] Eight clamping plates 11 are evenly distributed and fixed on one end surface of the fixing ring 10 and are formed into a cylindrical shape;

[0123] The inner surface of the cylinder surrounded by the eight clamping plates 11 is fitted and fastened to the outer surface of the boss 8;

[0124] like Figure 4 As shown, eight clamping plates 11 are fixed at 12 o'clock, 1.5 o'clock, 3 o'clock, 4.5 o'clock, 6 o'clock, 7.5 o'clock, 9 o'clock, and 10.5 o'clock of the head 3;

[0125] Each clamping plate 11 is fixed to the fixing ring 10 by a fastening bolt 9, and a fastening bolt 9 passes through a through hole of the fixing ring 10 and is connected to a bolt hole of the clamping plate 11;

[0126] The inner surface of each clamping plate 11 is fitted and fastened to the outer surface of the boss 8;

[0127] The inner plate surface of each clamping plate 11 is located on the inner surface of the cylinder surrounded by the multiple clamping plates 11;

[0128] One end of each fixed flexible tube 7 is connected to one end surface of a cylindrical skirt magnet 6, and the other end is connected to one end surface of a cylindrical boss magnet 12;

[0129] The other end surface of the skirt seat magnet 6 is adsorbed on the skirt seat surface, and the other end surface of the boss magnet 12 is adsorbed on the outer plate surface of a clamping plate 11;

[0130] The magnetic properties of the skirt magnet 6 and the boss magnet 12 are different;

[0131] Each fixed flexible tube 7 is provided with a plurality of cable clamping units, and the plurality of cable clamping units are used for clamping the second cable 5;

[0132] Each cable clamping unit includes a clamping ring 101 and a pair of fixing rings 102;

[0133] The clamping ring 101 is cylindrical, and its outer surface is provided with external threads, and is sleeved on the outer surface of the fixed flexible pipe 7;

[0134] Each fixing ring 102 is in the shape of a torus, and an internal thread is provided on its inner surface;

[0135] A pair of fixing rings 102 are sleeved on the clamping ring 101 and are independently rotated on the external threads of the clamping ring 101 through internal threads, and are used to adjust the relative distance according to the diameter of the second cable 5 to clamp the second cable 5;

[0136] The number of the plurality of fixed flexible tubes 7 is equal to the number of the plurality of clamping plates 11;

[0137] The number of the plurality of through holes of the fixing ring 10 is equal to the number of the plurality of clamping plates 11;

[0138] The end surface diameter of the boss magnet 12 is smaller than the width of the outer surface of one clamping plate 11 .

[0139] The heat treatment device for the cylinder segment near the skirt of the hydrogenation reactor of this embodiment is used to perform local heat treatment on the weld position of the cylinder segment 2 of a hydrogenation reactor. The maximum temperature difference of the outer wall 1# and the outer wall 2# at the weld center on both sides at the 6 o'clock position of the cylinder 1 weld, the outer wall 3#, the outer wall 4#, the inner wall 1#, and the inner wall 2# on both sides at 65mm from the weld center over time is shown in Table 1. It can be seen from Table 1 that the average maximum temperature difference is about 10°C, and the maximum temperature difference is less than 10°C when the insulation temperature is reached, which is far less than the required ±14°C requirement, and the temperature uniformity meets the heat treatment requirements.

[0140] Table 1 Temperature changes of the cylinder weld and surrounding points over time

[0141] Serial number time Outer wall 1# Outer wall 2# Outer wall 3# Outer wall 4# Inner wall 1# Inner wall 2# 1 50h 617 615 610 608 603 605 2 55h 656 653 649 648 639 633 3 60h 693 689 685 678 673 667 4 65h 704 702 699 695 687 682

[0142] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A heat treatment device for a cylinder segment near the skirt of a hydrogenation reactor, wherein the cylinder segment near the skirt comprises a connecting cylinder segment and a head connected to each other, wherein the connecting cylinder segment is a cylinder segment between the cylinder body and the skirt surface of the hydrogenation reactor, characterized in that: The device comprises: The cable comprises a first cable and a second cable, wherein the first cable is wound around the connecting tube section, and the second cable is wound from the skirt surface around a part of the outer surface of the sealing head; A second cable fixture, comprising a plurality of fixed flexible tubes, the plurality of fixed flexible tubes are radially distributed on the second cable and used to fix the second cable, each fixed flexible tube being coplanar with an axial surface of the hydrogenation reactor cylinder, and having one end connected to the skirt seat surface and the other end connected to the boss of the hydrogenation reactor; A power source, comprising a first power source and a second power source, wherein the first power source is electrically connected to the first cable, and the second power source is electrically connected to the second cable; The thermal insulation layer is laid between the hydrogenation reactor and the cable.

2. The device according to claim 1, characterized in that The first cable is spirally and evenly wound on the connecting tube section, and the second cable is spirally and evenly wound on a part of the outer surface of the head from the skirt seat surface; The winding width of the first cable is the width of the connecting tube section; The winding width of the second cable is the distance between a plane where the end point of the second cable wound on a portion of the outer surface of the head is located and a plane where the skirt seat surface is located.

3. The device according to claim 2, characterized in that The plane where the skirt seat surface is located is perpendicular to the axis of the cylinder; The plane where the end point of the second cable wound around a portion of the outer surface of the head is located is perpendicular to the axis of the cylinder.

4. The device according to claim 3, characterized in that The winding width of the second cable is calculated by the following steps: (1) Calculate the winding width of the cylinder heating cable according to the following formula: Wp=(6-8)·m·δ1; (2) Calculate the winding width of the additional heating cable required for the cylinder according to the following formula: (3) Calculate the volume of the head that needs to be heated additionally according to the following formula: V=Wp 补 *π(R 2 -(R-δ1) 2 ); (4) Calculate the winding width of the second cable according to the following formula: Among them, the value of m is 1-3, Wp is the winding width of the cylinder heating cable, Hr is the width of the connecting cylinder section, Wp 补 is the winding width of the additional heating cable required for the cylinder, V is the volume that needs to be heated at the head, R is the outer diameter of the cylinder, R1 is the outer diameter of the bottom surface of the head, H1 is the vertical distance from the vertex of the outer surface of the head to the plane where the skirt surface is located, H is the winding width of the second cable, δ1 is the wall thickness of the cylinder, and δ2 is the wall thickness of the head; The bottom surface of the head is coplanar with the skirt surface.

5. The device according to claim 4, characterized in that The winding turn spacing of the second cable is calculated according to the following formula: Among them, X1 is the winding turn spacing of the first cable, and X2 is the winding turn spacing of the first cable.

6. The device according to claim 1, characterized in that The second cable fixture further comprises a fixing ring and a plurality of clamping plates; The fixing ring is in the shape of a circular ring, and a plurality of through holes are evenly distributed on the end surface of the circular ring; Each clamping plate is in the shape of a long strip, and a bolt hole is arranged on one end surface thereof; The plurality of clamping plates are evenly distributed and fixed on one end surface of the fixing ring and are surrounded into a cylindrical shape; The cylindrical inner surface surrounded by the plurality of clamping plates is fitted and fastened to the outer surface of the boss.

7. The device according to claim 6, characterized in that Each clamping plate is fixed to the fixing ring by a fastening bolt, and the fastening bolt passes through a through hole of the fixing ring and is connected to a bolt hole of the clamping plate; The inner side surface of each clamping plate is fitted and fastened to the outer surface of the boss; The inner plate surface of each clamping plate is located on the inner surface of the cylinder surrounded by the multiple clamping plates.

8. The device according to claim 7, characterized in that One end of each fixed flexible tube is connected to one end surface of a cylindrical skirt magnet, and the other end is connected to one end surface of a cylindrical boss magnet; The other end surface of the skirt seat magnet is adsorbed on the skirt seat surface, and the other end surface of the boss magnet is adsorbed on the outer plate surface of a clamping plate; The magnetic properties of the skirt magnet and the boss magnet are the same or different.

9. The device according to claim 8, characterized in that A plurality of cable clamping units are arranged on each fixed flexible tube, and the plurality of cable clamping units are used for clamping the second cable; Each cable clamping unit includes a clamping ring and a pair of fixing rings; The clamping ring is cylindrical, and its outer surface is provided with external threads, and is sleeved on the outer surface of the fixed flexible pipe; Each fixing ring is in the shape of a torus, and an internal thread is arranged on its inner surface; The pair of fixing rings are sleeved on the clamping ring and are independently rotated on the external threads of the clamping ring through internal threads, so as to adjust the relative distance according to the diameter of the second cable to clamp the second cable.

10. The device according to claim 9, characterized in that The number of the plurality of fixed flexible tubes is equal to the number of the plurality of clamps; The number of the plurality of through holes of the fixing ring is equal to the number of the plurality of clamping plates; The end face diameter of the boss magnet is not greater than the width of the outer side surface of a clamping plate.

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