A kind of hydrogenation reactor near skirt place cylinder section heat treatment device

Abstract

The application discloses a kind of hydrogenation reactor skirt near place cylinder section heat treatment device, skirt near place cylinder section includes mutually connected connecting cylinder section, end cover, connecting cylinder section is the cylinder section between the cylinder of hydrogenation reactor to skirt surface, the device includes: cable, including first cable and second cable, first cable is around set on connecting cylinder section, second cable is from skirt surface and is around set on the part outer surface of end cover;Second cable fixer, including multiple fixed flexible pipes, multiple fixed flexible pipes are radially distributed on second cable, and for fixing second cable, each fixed flexible pipe is coplanar with the axial surface of hydrogenation reactor cylinder, and one end is connected skirt surface, the other end is connected the boss of hydrogenation reactor;Power supply, including first power supply and second power supply;Heat insulation layer, lay between hydrogenation reactor and cable.The application proposes heat treatment device to realize the uniformity in heat treatment, solves the cable fixing problem in actual operation process, guarantees heating effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of local heat treatment and temperature uniformity control, and particularly relates to a heat treatment device for a skirt-adjacent cylinder section of a hydrogenation reactor. BACKGROUND

[0002] Hydrogenation process has been applied in industry since 1927. Raw oil is subjected to hydrogenation reaction at about 175-455 DEG C in the presence of catalyst and high-pressure hydrogen, and hydrocarbons are converted into low-molecular-weight products in the presence of high-pressure hydrogen and catalyst. The hydrogenation reactor provides a place for raw oil and hydrogen to react in the presence of catalyst and under certain temperature and pressure conditions.

[0003] With the vigorous development of ten-million-ton refining and million-ton ethylene, the specifications, structures and systems of hydrogenation reactors are becoming more and more complex. The largest hydrogenation reactor in China has an outer diameter of 6517 mm and a wall thickness of 352 mm. The larger the outer diameter and wall thickness and the more complex the structure, the higher the requirements for manufacturing, supervision, inspection, maintenance, repair and maintenance.

[0004] In terms of local heat treatment, the traditional heating method cannot meet the requirements of heat treatment. At the same time, traditional methods such as the car-type furnace cause serious environmental pollution, and induction heating local heat treatment as a new heat treatment method has many advantages such as cleanliness, economic energy saving, easy automation control, good temperature uniformity and the like, which greatly solves the problem of temperature control accuracy of local heat treatment of large-scale thick-walled vessels.

[0005] However, induction heating is less used in the chemical industry at present, and lacks theoretical design support. The realization of temperature uniformity needs to adjust the turn-to-turn spacing of the cable according to real-time data. Moreover, once the structure is complex, the cable winding method is also a difficult problem.

[0006] If the hydrogenation reactor cylinder and the head, i.e. the skirt-adjacent cylinder section, are subjected to local heat treatment, the heating band exceeds the actual length according to the standard due to being too close to the edge of the cylinder, and it is difficult to meet the heat treatment requirements. In addition, due to the change of radius at the head, cable fixation also has certain difficulty, and the heating effect is also affected in the actual operation process.

[0007] Based on this technical background, the present application researches a heat treatment device for a skirt-adjacent cylinder section of a hydrogenation reactor.

[0008] To solve the above problems, the present application proposes to set an auxiliary heating band at the head to supplement the length of the heating band, so as to meet the heat treatment requirements and realize the temperature uniformity. In addition, due to the change of radius at the head, cable arrangement also has certain difficulty, and the present application proposes to design a heating tool suitable for induction heating at the head to realize the heating effect. SUMMARY

[0009] In order to overcome the defects of the prior art, the present application provides a heat treatment device for a cylinder segment near a skirt of a hydrogenation reactor, which comprises a connecting cylinder segment and a head connected to each other, the connecting cylinder segment being a cylinder segment between a cylinder body and a skirt surface of the hydrogenation reactor, and the device comprises:

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

[0011] a cable comprising a first cable and a second cable, the first cable being wound on the connecting cylinder segment, and the second cable being wound on a part of an outer surface of the head from the skirt surface;

[0012] a second cable fixing device comprising a plurality of fixing flexible pipes, the plurality of fixing flexible pipes being radially and uniformly distributed on the second cable, and each fixing flexible pipe being coplanar with an axial surface of the cylinder body of the hydrogenation reactor, one end of each fixing flexible pipe being connected to the skirt surface, and the other end of each fixing flexible pipe being connected to a boss of the hydrogenation reactor;

[0013] a power supply comprising a first power supply and a second power supply, the first power supply being electrically connected to the first cable, and the second power supply being electrically connected to the second cable;

[0014] a heat preservation layer being laid between the hydrogenation reactor and the cable.

[0015] The present application has the following effects:

[0016] (1) The heat treatment device for a cylinder segment near a skirt of a hydrogenation reactor provided by the present application winds a first cable on a connecting cylinder segment and winds a second cable on a part of an outer surface of a head from a skirt surface, so as to meet the heat treatment requirements and realize the uniformity in heat treatment; meanwhile, a second cable fixing device solves the cable fixing problem in actual operation process and ensures the heating effect.

[0017] (2) The heat treatment device for a cylinder segment near a skirt of a hydrogenation reactor provided by the present application divides the cylinder segment near the skirt into a connecting cylinder segment and a head, and realizes an average maximum temperature difference of about 10℃ for the cylinder segment near the skirt by accurately calculating the winding width of the second cable, and the temperature difference of the heat preservation temperature is less than 10℃, which is much smaller than the required ±14℃, so as to solve the problem that the cylinder segment near the skirt of the hydrogenation reactor cannot meet the local heat treatment requirements.

[0018] (3) The hydrogenation reactor near the skirt heat treatment device of the present application, a plurality of fixed flexible pipes are radially distributed on the second cable, which can be bent to adapt to the structure of the head; one end of each fixed flexible pipe is adsorbed on the skirt surface by a cylindrical skirt magnet, and the other end is adsorbed on the outer plate surface of a clamping plate by a boss magnet, so as to effectively fix the cable around the different head radius; at the same time, the magnetism of the skirt magnet and the boss magnet can be the same or different, so that the fixed cable of the plurality of fixed flexible pipes is more flexible.

[0019] (4) The hydrogenation reactor near the skirt heat treatment device of the present application, a plurality of fixed flexible pipes are radially distributed on the second cable, which can be bent to adapt to the structure of the head; one end of each fixed flexible pipe is adsorbed on the skirt surface by a cylindrical skirt magnet, and the other end is adsorbed on the outer plate surface of a clamping plate by a boss magnet, so as to effectively fix the cable around the different head radius; at the same time, the magnetism of the skirt magnet and the boss magnet can be the same or different, so that the fixed cable of the plurality of fixed flexible pipes is more flexible.

[0020] (5) The hydrogenation reactor near the skirt heat treatment device of the present application, a plurality of fixed flexible pipes are radially distributed on the second cable, which can be bent to adapt to the structure of the head; one end of each fixed flexible pipe is adsorbed on the skirt surface by a cylindrical skirt magnet, and the other end is adsorbed on the outer plate surface of a clamping plate by a boss magnet, so as to effectively fix the cable around the different head radius; at the same time, the magnetism of the skirt magnet and the boss magnet can be the same or different, so that the fixed cable of the plurality of fixed flexible pipes is more flexible.

[0021] (6) The hydrogenation reactor near the skirt heat treatment device of the present application, a plurality of fixed flexible pipes are radially distributed on the second cable, which can be bent to adapt to the structure of the head; one end of each fixed flexible pipe is adsorbed on the skirt surface by a cylindrical skirt magnet, and the other end is adsorbed on the outer plate surface of a clamping plate by a boss magnet, so as to effectively fix the cable around the different head radius; at the same time, the magnetism of the skirt magnet and the boss magnet can be the same or different, so that the fixed cable of the plurality of fixed flexible pipes is more flexible.

[0022] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views.

[0024] Figure 1 The structure diagram of the hydrogenation reactor near the skirt heat treatment device of the present application.

[0025] Figure 2 The structure diagram of the hydrogenation reactor near the skirt heat treatment device of the present application. Figure 1 The structure diagram of the hydrogenation reactor near the skirt heat treatment device of the present application.

[0026] Figure 3 The head geometry calculation diagram of the winding width of the second cable of the hydrogenation reactor near the skirt heat treatment device of the present application.

[0027] Figure 4 The overall structure of the heat treatment device for the cylinder near the skirt of the hydrogenation reactor according to the present application is shown in the figure.

[0028] Figure 5 The front view structure of the second cable fixer fixing the near skirt surface of the flexible pipe in the heat treatment device for the cylinder near the skirt of the hydrogenation reactor according to the present application is shown in the figure.

[0029] Figure 6 The three-dimensional structure of the second cable fixer fixing the near skirt surface of the flexible pipe in the heat treatment device for the cylinder near the skirt of the hydrogenation reactor according to the present application is shown in the figure.

[0030] Figure 7 The three-dimensional structure of the near boss part of the second cable fixer in the heat treatment device for the cylinder near the skirt of the hydrogenation reactor according to the present application is shown in the figure.

[0031] Figure 8 The partial cross-sectional view of the near boss part of the second cable fixer in the heat treatment device for the cylinder near the skirt of the hydrogenation reactor according to the present application is shown in the figure.

[0032] Explanation of reference signs:

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

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

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

[0036] In the present application, the orientation words such as "upper" and "lower" used herein generally refer to the upper and lower of the device in the normal use state, for example, the figure surface direction of Figure 1 , and "inner" and "outer" refer to relative to the outline of the device. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", and "third" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0037] The application provides a heat treatment device for a cylinder section near a skirt of a hydrogenation reactor, as shown in the figure. Figures 1 to 8 The cylinder section near the skirt comprises a connecting cylinder section 2 and a head 3 connected with each other, and the connecting cylinder section 2 is a cylinder section between a cylinder body 1 of the hydrogenation reactor and a skirt surface.

[0038] The device comprises:

[0039] A cable, which comprises a first cable 4 and a second cable 5, the first cable 4 is wound on the connecting cylinder section 2, and the second cable 5 is wound on a part of the outer surface of the head 3 from the skirt surface;

[0040] A second cable fixing device, which comprises a plurality of fixing flexible pipes 7, the fixing flexible pipes 7 are radially and uniformly distributed on the second cable 5 and used for fixing the second cable 5, each fixing flexible pipe 7 is coplanar with an axial surface of the cylinder body 1 of the hydrogenation reactor, and one end of the fixing flexible pipe 7 is connected with the skirt surface and the other end is connected with a boss 8 of the hydrogenation reactor;

[0041] A power supply, which comprises a first power supply and a second power supply, the first power supply is electrically connected with the first cable 4, and the second power supply is electrically connected with the second cable 5;

[0042] An insulation layer, which is laid between the hydrogenation reactor and the cable.

[0043] In the application, the first cable 4 is wound on the connecting cylinder section 2, and the second cable 5 is wound on a part of the outer surface of the head 3 from the skirt surface, so that the heat treatment requirement is met and the temperature uniformity in the heat treatment is realized; meanwhile, the second cable fixing device solves the cable fixing problem in the actual operation process and guarantees the heating effect.

[0044] Preferably, the first cable 4 is uniformly wound on the connecting cylinder section 2 in a spiral manner, and the second cable 5 is uniformly wound on a part of the outer surface of the head 3 in a spiral manner from the skirt surface;

[0045] The winding width of the first cable 4 is the width of the connecting cylinder section 2;

[0046] The winding width of the second cable 5 is the distance between the plane where the winding end of the second cable 5 on the part of the outer surface of the head 3 is located and the plane where the skirt surface is located.

[0047] According to the application, the plane where the skirt surface is located is perpendicular to the axis of the cylinder body 1.

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

[0049] (1) The winding width of the heating cable of the cylinder body 1 is calculated according to the following formula:

[0050] Wp=(6-8)·m·δ1;

[0051] (2) The winding width of the supplementary heating cable required by the cylinder 1 is calculated according to the following formula:

[0052]

[0053] (3) The volume of the supplementary heating required at the head 3 is calculated according to the following formula:

[0054] V = Wp 补 * π (R 2 - (R - δ1) 2 );

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

[0056]

[0057] Wherein, 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 segment 2, Wp 补 is the winding width of the supplementary heating cable required by the cylinder 1, V is the volume of the supplementary heating required 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 top point 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 application, the cylinder segment near the skirt is divided into the connecting cylinder segment 2 and the head 3, and by accurately calculating the winding width of the second cable 5, the average maximum temperature difference of the cylinder segment near the skirt is about 10℃, and the temperature difference of the heat preservation temperature is less than 10℃, which is far less than the requirement of ±14℃, thereby solving the problem that the hydrogenation reactor near the skirt cannot meet the local heat treatment requirement.

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

[0061]

[0062] Wherein, 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 fixing device 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 body, and a plurality of through holes are uniformly distributed on the end face of the circular ring body;

[0065] Each clamping plate 11 is in the shape of a long strip plate, and a bolt hole is arranged on one side end face of the clamping plate 11.

[0066] The plurality of clamping plates 11 are evenly distributed and fixed to one side end surface of the fixing ring 10, and form a cylindrical shape;

[0067] The inner surface of the cylindrical shape formed by the plurality of clamping plates 11 is attached and fixed to the outer surface of the boss 8.

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

[0069] The inner side plate surface of each clamping plate 11 is attached and fixed to the outer surface of the boss 8;

[0070] The inner side plate surface of each clamping plate 11 is located on the inner surface of the cylindrical shape formed by the plurality of clamping plates 11.

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

[0072] The other side end surface of the skirt magnet 6 is adsorbed to the skirt surface, and the other side end surface of the boss magnet 12 is adsorbed to the outer side plate surface of one clamping plate 11;

[0073] The magnetism of the skirt magnet 6 and the boss magnet 12 is the same or different.

[0074] In the present application, the plurality of fixed flexible pipes 7 are evenly distributed radially on the second cable 5, which can be bent to adapt to the structure requirements at the head 3; one end of each fixed flexible pipe 7 is adsorbed to the skirt surface through the cylindrical skirt magnet 6, and the other end is adsorbed to the outer side plate surface of one clamping plate 11 through the boss magnet 12, so as to effectively fix the cable 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 way of fixing the cable by the plurality of fixed flexible pipes 7 is more flexible.

[0075] According to a preferred embodiment of the present application, a plurality of cable clamping units are arranged on each fixed flexible pipe 7, and the plurality of cable clamping units are used to clamp the second cable 5;

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

[0077] The clamping ring 101 is in a cylindrical shape, and an outer thread is arranged on the outer surface thereof, and the clamping ring 101 is sleeved on the outer surface of the fixed flexible pipe 7;

[0078] Each fixing ring 102 is in a circular ring body shape, and an inner thread is arranged on the inner surface thereof;

[0079] A pair of fixed rings 102 are sleeved on the clamping ring 101 and are independently rotated on the outer thread of the clamping ring 101 through the inner thread, for adjusting the relative distance and clamping the second cable 5 according to the diameter of the second cable 5.

[0080] In the present application, a plurality of cable clamping units on each fixed flexible tube 7 are arranged for clamping the second cable 5, and all the cable clamping units on the plurality of fixed flexible tubes 7 can clamp the second cable 5 at the same time, and the flexible adjustment of the turn-to-turn spacing of the second cable 5 can be realized through the sleeving of the cylindrical clamping ring 101 on the outer surface of the fixed flexible tube 7.

[0081] In the present application, the flexible clamping according to the diameter of the second cable 5 is realized through the cooperation of the outer thread on the outer surface of the cylindrical clamping ring 101 and the inner thread on the inner surface of the annular fixed ring 102.

[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 fixed 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 side plate surface of one clamping plate 11.

[0085] In the present application, the inner side plate surface of each clamping plate 11 is attached to the boss 8 for fixing, and the other end surface is attached to one of the boss magnets 12, which solves the problem that the outer side arc structure of the boss 8 and the magnet contact surface are too small to fix the flexible tube 7.

[0086] The present application will be described in more detail through a specific embodiment.

[0087] Embodiment 1

[0088] In this embodiment, the local heat treatment is carried out on the weld position of the connecting cylinder section 2 of a certain hydrogenation reactor, the outer diameter R of the cylinder body 1 is 2261.5 mm, the outer diameter R1 of the bottom surface of the head 3 is 2422 mm, the width Hr of the connecting cylinder section 2 is 332 mm, the vertical distance H1 from the top point of the outer surface of the head 3 to the plane where the skirt surface is located is 2282.5 mm, the wall thickness δ1 of the cylinder body 1 is 261.5 mm, the wall thickness δ2 of the head 3 is 160 mm, Wp is the winding width of the heating cable of the cylinder body 1, Wp 补 Wp is the winding width of the heating cable of the cylinder body 1, V is the volume of the head 3 that needs to be supplemented by heating, and H is the winding width of the second cable 5.

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

[0090] The cable includes a first cable 4 and a second cable 5. The first cable 4 is spirally and evenly wound on the connecting cylinder 2, and the second cable 5 is spirally and evenly wound on a portion of the outer surface of the end cap 3 from the skirt seat surface.

[0091] The second cable holder includes multiple fixed flexible tubes 7. Eight fixed flexible tubes 7 are radially distributed on the second cable 5 and are used to fix the second cable 5. Each fixed flexible tube 7 is coplanar with one axial surface of the hydrogenation reactor body 1, and one end of it is connected to the skirt seat surface, and the other end is connected to the boss 8 of the hydrogenation reactor.

[0092] The power supply includes a first power supply and a second power supply, the first power supply being electrically connected to a first cable 4, and the second power supply being electrically connected to a second cable 5;

[0093] An insulation layer is laid between the hydrogenation reactor and the cable;

[0094] like Figure 4 As shown, eight fixed flexible tubes 7 fix the second cable 5 at the 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 directions of the end cap 3;

[0095] The winding width of the first cable 4 is the width of the connecting 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 outer surface of part of the end cap 3 and the plane where the skirt surface is located.

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

[0098] The plane where the end point of the second cable 5 is wound on the outer surface of part of the end cap 3 is perpendicular to the axis of the cylinder 1.

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

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

[0101] Wp=(6-8)·m·δ1;

[0102] For the weld at the connecting cylinder section 2, local heat treatment shall be performed. The winding width of the heating cable of cylinder 1 shall be determined in accordance with CSTM group standard T / CSTM 00546-2021 "Specification for Local Weld Thickness Heat Treatment of Pressure Equipment" 5.2.3c.

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

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

[0105] Wherein, the coefficient 6-8 takes the minimum value 6, the value of m is 1, the calculation result is rounded up, Wp takes 1600 mm, at this time the winding width of the cable on one side of the hydrogenation reactor near the skirt is required to be 800 mm, and the connecting cylinder segment 2 width Hr = 332 mm, which cannot meet the requirement. Therefore, an auxiliary heating band, i.e. the winding width H of the second cable 5, needs to be arranged at the head 3.

[0106] (2) The winding width of the shell 1 required to supplement the heating cable is calculated according to the following formula:

[0107]

[0108] (3) The volume required to supplement the heating at the head 3 is calculated 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) The winding width of the second cable 5 is calculated according to the following formula:

[0112]

[0113] Substituting R1, H1, δ2 and V, H = 760.5 mm is calculated, which is 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 requirement and material;

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

[0117]

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

[0119] The second cable fixer 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 uniformly distributed on the end face 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 side end face thereof;

[0122] The eight clamping plates 11 are uniformly distributed and fixed on one side end face of the fixing ring 10, and form a cylindrical shape;

[0123] The inner surface of the cylindrical shape formed by the eight clamping plates 11 is attached and fixed to the outer surface of the boss 8;

[0124] As shown in Figure 4 , the eight clamping plates 11 are fixed in the directions of 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 one fastening bolt 9 passes through a through hole of the fixing ring 10 and is connected to the bolt hole of the clamping plate 11;

[0126] The inner side surface of each clamping plate 11 is attached and fixed to the outer surface of the boss 8;

[0127] The inner side surface of each clamping plate 11 is located on the inner surface of the cylindrical shape formed by the plurality of clamping plates 11;

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

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

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

[0131] A plurality of cable clamping units are arranged on each fixed flexible pipe 7, and the plurality of cable clamping units are used to clamp the second cable 5;

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

[0133] The clamping ring 101 is in a cylindrical shape, and an outer thread is arranged on the outer surface of the clamping ring 101, and the clamping ring 101 is sleeved on the outer surface of the fixed flexible pipe 7;

[0134] Each fixing ring 102 is in a circular ring shape, and an inner thread is arranged on the inner surface of the fixing ring 102;

[0135] A pair of fixing rings 102 are sleeved on the clamping ring 101, and are independently rotated on the outer thread of the clamping ring 101 through the inner thread, for clamping the second cable 5 according to the diameter of the second cable 5 to adjust the relative distance;

[0136] The number of the plurality of fixed flexible pipes 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 less than the width of the outer side surface of one clamping plate 11.

[0139] The partial heat treatment device for the near skirt of the hydrogenation reactor of the embodiment is used to perform partial heat treatment on the welding seam position of the connecting cylinder section 2 of a certain hydrogenation reactor, and the maximum temperature difference of the outer wall 1# and the outer wall 2# of the welding seam center on both sides of the 6 o'clock position of the cylinder body 1, the outer wall 3# and the outer wall 4# and the inner wall 1# and the inner wall 2# of the inner and outer walls 65 mm away from the welding seam center changes with time, and the temperature is shown in Table 1. From Table 1, it can be seen that the average maximum temperature difference is about 10℃, and when the temperature reaches the holding temperature, the temperature difference is less than 10℃, which is much smaller than the requirement of ±14℃, and the uniformity meets the heat treatment requirements.

[0140] Table 1 Temperature of points on the welding seam and the periphery of the cylinder body changes with 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 above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious 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 at a near-skirt of a hydrogenation reactor, the cylinder segment at the near-skirt comprising a connecting cylinder segment, a head, the connecting cylinder segment being a cylinder segment between a cylinder of the hydrogenation reactor and a skirt surface, characterized in that, The device comprises: a cable, comprising a first cable and a second cable, the first cable being spirally and uniformly wound on the connecting cylinder segment, and the second cable being spirally and uniformly wound on a part of the outer surface of the head from the skirt surface; a second cable fixer, comprising a plurality of fixing flexible tubes, the plurality of fixing flexible tubes being radially and uniformly distributed on the second cable and used for fixing the second cable, each fixing flexible tube being coplanar with one axial surface of the hydrogenation reactor cylinder body, and one end of each fixing flexible tube being connected to the skirt surface and the other end being connected to the boss of the hydrogenation reactor; a power supply, comprising a first power supply and a second power supply, the first power supply being electrically connected to the first cable, and the second power supply being electrically connected to the second cable; a thermal insulation layer, being laid between the hydrogenation reactor and the cable.

2. The apparatus of claim 1, wherein, The first cable is spirally and uniformly wound on the connecting cylinder segment, and the second cable is spirally and uniformly wound on a part of the outer surface of the head from the skirt surface; The winding width of the first cable is the width of the connecting cylinder segment; The winding width of the second cable is the distance between the plane where the second cable is wound on a part of the outer surface of the head and the plane where the skirt surface is located.

3. The apparatus of claim 2, wherein, The plane where the skirt surface is located is perpendicular to the axis of the cylinder body; The plane where the second cable is wound on a part of the outer surface of the head is perpendicular to the axis of the cylinder body.

4. The apparatus of claim 3, wherein, The winding width of the second cable is calculated by the following steps: (1) The winding width of the cylinder body heating cable is calculated according to the following formula: Wp=(6-8)·m·δ1; (2) The winding width of the cylinder body required for supplementary heating cable is calculated according to the following formula: ； (3) The volume required for supplementary heating at the head is calculated according to the following formula: ； (4) The winding width of the second cable is calculated according to the following formula: V； wherein m is a value of 1-3, Wp is the winding width of the cylinder heating cable, is the connection cylinder segment width, is the winding width of the cylinder required to supplement the heating cable, V is the volume required to supplement the heating 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 top point of the outer surface of the head to the plane of the skirt surface, 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 apparatus of claim 4, wherein, The winding turn spacing of the second cable is calculated according to the following formula: X2 = 1 Wherein, X1 is the winding turn spacing of the first cable, and X2 is the winding turn spacing of the second cable.

6. The apparatus of claim 1, wherein, The second cable fixer 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 uniformly distributed on the circular ring end surface of the fixing ring; Each clamping plate is in the shape of a long strip, and a bolt hole is arranged on one side end surface of each clamping plate; The plurality of clamping plates are uniformly distributed and fixed on one side end surface of the fixing ring, and form a cylindrical shape; The inner surface of the cylindrical shape formed by the plurality of clamping plates is fitted and fastened on the outer surface of the boss.

7. The apparatus of claim 6, wherein, Each clamping plate is fixed on the fixing ring by one fastening bolt, and the one fastening bolt is connected to the bolt hole of the clamping plate through one through hole of the fixing ring; The inner side surface of each clamping plate is fitted and fastened on the outer surface of the boss; The inner side surface of each clamping plate is located on the inner surface of the cylindrical shape formed by the plurality of clamping plates.

8. The apparatus of claim 7, wherein, One end of each fixing flexible tube is connected to one side end surface of a cylindrical skirt magnet, and the other end is connected to one side end surface of a cylindrical boss magnet; The other side end surface of the skirt magnet is adsorbed on the skirt surface, and the other side end surface of the boss magnet is adsorbed on the outer side surface of one clamping plate; The magnetism of the skirt magnet and the boss magnet is the same or different.

9. The apparatus of claim 8, wherein, A plurality of cable clamping units are arranged on each fixed flexible pipe, and the plurality of cable clamping units are used for clamping the second cable; Each cable clamping unit comprises a clamping ring and a pair of fixing rings; The clamping ring is in a cylindrical shape, and an outer surface of the clamping ring is provided with external threads and is sleeved on an outer surface of the fixed flexible pipe where the clamping ring is arranged; Each fixing ring is in a circular ring body shape, and an inner surface of the fixing ring is provided with internal threads; The pair of fixing rings are sleeved on the clamping ring, and are independently rotated on the external threads of the clamping ring through the internal threads, respectively, for adjusting the relative distance to clamp the second cable according to the diameter of the second cable.

10. The apparatus of claim 9, wherein, The number of the plurality of fixed flexible pipes is equal to the number of the plurality of clamping plates; 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 surface diameter of the boss magnet is not greater than the width of the outer side plate surface of one clamping plate.

Images