A heating furnace with a pull rod

Abstract

A heating furnace with a tie rod of the present invention comprises a furnace wall located on the peripheral side for enclosing a chamber, the furnace wall comprises columns and furnace wall panels, the furnace wall panels are fixed to the columns, a tie rod and a fixing structure are arranged between the opposite columns, the tie rod is fixed to the column and does not pass through the furnace wall panels, and the two ends of the tie rod are fixed to the column through the fixing structure. Compared with the prior art, the present invention does not need to open a hole in the furnace wall panel for the tie rod to pass through, and the fixing structure is fixed on the column, so the structure does not reduce the strength of the furnace wall, and plays a role in improving the overall strength of the furnace wall. Since the tie rod is arranged on the inner side of the furnace wall and does not pass through the furnace wall panel, after the installation of the entire equipment is completed, the tie rod does not need to be removed, and the previous process of blocking the opening is saved. The internal insulation structure can be completed before installation to avoid high-altitude work to install the insulation structure, so the entire installation process is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of heating furnaces in petroleum refining, petrochemical industry and other chemical industries, and in particular to a heating furnace with a pull rod. Background Art

[0002] Structural design and function of traditional heating furnace:

[0003] Heating furnaces are the leaders in petrochemical industry, including atmospheric pressure furnaces, pressure reducing furnaces, hydrogen production furnaces, reforming furnaces, coking furnaces, conversion furnaces and cracking furnaces. The function of tubular heating furnaces is to heat the medium (oil or gas) to the temperature required by the process.

[0004] The heating furnace is generally assembled from two main structures, the convection section and the radiation section. The convection section is provided with two opposite furnace walls, which include columns of I-beams, H-beams and other steel sections, and steel furnace wall panels welded and fixed on the columns. Insulation nails are distributed and welded on the steel plates, and heat-insulating and wear-resistant materials are cast between the insulation nails. The bracket installed on the furnace wall is used to support the tube sheet. The tube sheet is provided with through holes, and the furnace tube is supported through the through holes. The oil that needs to be heated flows through the furnace tube, and the high-temperature flue gas or hot air flows from bottom to top in the furnace outside the furnace tube. The heat is transferred to the oil or other media in the tube through the tube wall.

[0005] The furnace wall mentioned above includes furnace wall panels and columns. The side of the furnace wall panels are partially stacked and fixed with the columns. The columns are interconnected steel structures formed by various steel sections. They are force-bearing frames. The furnace wall panels are welded and fixed to the columns. The inner side of the furnace wall panels is provided with a thick lining and insulation layer (in the form of castables, insulation cotton, etc.). During installation, the two groups of columns are arranged opposite to each other. In order to prevent the furnace wall from deforming during transportation and installation, tie rods need to be provided on the furnace wall to play a role of fixed support. Existing tie rod structures such as Figure 1 and Figure 2 As shown, Figure 2 During transportation and installation, the tie rod is fixed. The opposite furnace wall plate 40 is penetrated with a hollow tube 20 inwardly, and the hollow tube 20 passes through the lining and the heat insulation layer. The column 10 is fixed with an H-shaped special-shaped steel 30. One side plate of the special-shaped steel 30 is fixed to the furnace wall plate 40. Both ends of the tie rod 70 are provided with external threads. After the two or three meter long tie rod passes through the special-shaped steel 30 and the hollow tube 20, each end of the tie rod 70 is fixed to the other side plate of the special-shaped steel 30 through two sets of nuts (washers). Such a structure can not only tighten the furnace wall outward, but also apply a locking force inward to the furnace wall to achieve a balanced and fixed effect.

[0006] After the equipment is installed and before the heating furnace enters the working state, it is necessary to unscrew the nuts at both ends of the tie rod, pull out the tie rod 70, fill the hollow tube 20 with the core material 60, and then use the plug 50 to plug the openings at both ends of the hollow tube 20, and a series of heat insulation measures are taken to prevent the internal heat from overflowing from this channel, forming a Figure 3 The structure shown.

[0007] However, the above structure has the following problems: since the furnace wall plate has holes for inserting the hollow tube 20 and the tie rod 70, the strength of the furnace wall plate is weakened. Since the tie rod needs to be removed and the insulation structure needs to be installed after the heating furnace is installed and before it enters the working state, the whole process is relatively complicated and the installation is inconvenient. Summary of the invention

[0008] In view of the above technical problems in the prior art, the present invention provides a heating furnace with a pull rod which ensures the overall strength of the furnace wall and has a convenient installation process.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A heating furnace with a tie rod is provided, comprising a furnace wall located on the peripheral side for enclosing a chamber, the furnace wall comprising columns and furnace wall plates, the furnace wall plates are fixed to the columns, tie rods and fixing structures are arranged between the opposite columns, the tie rods are fixed to the columns and do not pass through the furnace wall plates, and the two ends of the tie rods are fixed to the columns through the fixing structures.

[0011] Among them, the fixing structure includes a base plate and a connecting seat with an "Ω"-shaped cross-section, the two sides of the connecting seat are fixed to the column by a first stud and a first nut, the base plate is arranged between the connecting seat and the column, the first stud passes through the column, the base plate and the connecting seat in sequence, and the end of the pull rod is fixed to the top of the connecting seat.

[0012] Wherein, a heat-insulating gasket is arranged between the connecting seat and the bottom plate, and the first stud passes through the column, the bottom plate, the heat-insulating gasket and the connecting seat in sequence.

[0013] Wherein, the end of the pull rod is provided with an external thread, and the end of the pull rod passes through the connecting seat and is fixed by a locking nut.

[0014] Wherein, the connecting seat and the pull rod are an integrated structure.

[0015] Among them, the fixing structure includes a lug and a "Y"-shaped transition piece, the lug is fixed to the column through a second stud and a second nut, the opening of the transition piece is fixed to the lug through a third stud and a third nut, the transition piece is fixedly connected to the pull rod, and an insulation gasket is arranged between the transition piece and the lug and is sleeved on the third stud.

[0016] Wherein, the pull rod and the transition piece are an integrated structure.

[0017] Among them, the fixing structure includes a lug and a "U"-shaped transition piece, the lug is fixed to the column through a fourth stud and a fourth nut, the opening of the transition piece is fixed to the lug through a fifth stud and a fifth nut, the transition piece is fixedly connected to the pull rod, and an insulation gasket is arranged between the transition piece and the lug and is sleeved on the fifth stud.

[0018] Wherein, the end of the pull rod is provided with an external thread, and the end of the pull rod passes through the transition piece and is fixed by a nut.

[0019] Wherein, a primary cast lining is arranged below the fixed structure, and a secondary cast lining is arranged at the connection between the pull rod and the fixed structure.

[0020] Beneficial effects of the present invention:

[0021] A heating furnace with a tie rod of the present invention comprises a furnace wall located on the peripheral side for enclosing a chamber, the furnace wall comprises a column and a furnace wall plate, the furnace wall plate is fixed to the column, a tie rod and a fixing structure are arranged between the opposite columns, the tie rod is fixed to the column and does not pass through the furnace wall plate, and the two ends of the tie rod are fixed to the column through the fixing structure. Compared with the prior art, the present invention does not need to open a hole in the furnace wall plate for the tie rod to pass through, and the fixing structure is fixed on the column, so the structure does not reduce the strength of the furnace wall, and plays a role in improving the overall strength of the furnace wall. Since the tie rod is arranged on the inner side of the furnace wall and does not pass through the furnace wall plate, after the installation of the whole equipment is completed, the tie rod does not need to be removed, and the previous process of blocking the opening is saved. Also, since there is no need to remove the tie rod, the internal insulation structure can be made before installation, avoiding high-altitude work to install the insulation structure, so the whole installation process is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a heating furnace in the prior art under installation.

[0023] Figure 2 for Figure 1 Cross-sectional view along the S1-S1 direction.

[0024] Figure 3 It is a structural schematic diagram of a heating furnace in the working state in the prior art.

[0025] Figure 4 It is a structural schematic diagram of a heating furnace with a pull rod in an embodiment.

[0026] Figure 5 for Figure 4Cross-sectional view along the A1-A1 direction.

[0027] Figure 6 for Figure 5 Cross-sectional view along the A2-A2 direction.

[0028] Figure 7 This is a schematic diagram of the structure of a heating furnace with a pull rod in Example 2.

[0029] Figure 8 for Figure 7 Cross-sectional view along the B1-B1 direction.

[0030] Fig. 9 for Figure 8 Cross-sectional view along the B2-B2 direction.

[0031] Fig.10 This is a schematic diagram of the structure of a heating furnace with a pull rod in Example 3.

[0032] Fig.11 for Fig.10 Cross-sectional view along the C1-C1 direction.

[0033] Fig.12 for Fig.10 A cross-sectional view in another direction.

[0034] Fig.13 This is a schematic diagram of the structure of a heating furnace with a pull rod in Example 4.

[0035] Fig.14 for Fig.13 Cross-sectional view along the D1-D1 direction.

[0036] Fig.15 for Fig.14 Cross-sectional view along the D2-D2 direction.

[0037] Figures 1 to 3 Reference numerals:

[0038] The column 10 , the hollow tube 20 , the special-shaped steel 30 , the furnace wall plate 40 , the plug 50 , the core material 60 , and the pull rod 70 .

[0039] Figures 4 to 15 Reference numerals:

[0040] Furnace wall 1, column 11;

[0041] Tie rod 2;

[0042] Connecting seat 21, first stud 22, first nut 23, heat insulating washer 24, locking nut 25, bottom plate 26;

[0043] Lug 31, "Y"-shaped transition piece 32, second stud 33, second nut 34, third stud 35, third nut 36, thermal insulation washer 37;

[0044] A “U”-shaped transition piece 41 , a fourth stud 42 , a fourth nut 43 , a fifth stud 44 , a fifth nut 45 , and a thermal insulation washer 46 .

[0045] The primary pouring lining area 51 and the secondary pouring lining area 52 . DETAILED DESCRIPTION

[0046] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0047] Example 1

[0048] One of the heating furnaces with a pull rod in this embodiment, such as Figures 4 to 6 As shown, it includes a furnace wall 1 located on the peripheral side for enclosing a chamber, the furnace wall 1 includes columns 11 and furnace wall panels, the peripheral side portions of the furnace wall panels are partially laminated and welded to the columns 11, and tie rods 2 and fixing structures are arranged between the opposite columns 11, the tie rods 2 are arranged on the inner side of the furnace wall and do not pass through the furnace wall panels, and the two ends of the tie rods 2 are fixed to the columns 11 through the fixing structure, that is, the portions of the columns 11 that are not covered by the furnace wall panels. Specifically, the fixing structure includes a base plate 26 and a connecting seat 21 with an "Ω"-shaped cross-section. The two sides of the connecting seat 21 are fixed to the column 11 by a first stud 22 and two first nuts 23. The base plate 26 is arranged between the connecting seat 21 and the column 11. The first stud 22 passes through the column 11, the base plate 26 and the connecting seat 21 in sequence. The first nut 23 locks the two ends of the first stud 22 respectively. The end of the pull rod 2 is fixed to the top in the middle of the connecting seat 21. Such a fixing structure is well balanced in the lateral and longitudinal forces, and the overall balance and stability. In the working state, the pull rod 2 will not loosen even if it is impacted by a heat wave.

[0049] Compared with the prior art, the present invention does not need to open a hole in the furnace wall plate for the tie rod 2 to pass through, and the fixing structure is fixed on the column 11, so the structure will not reduce the strength of the furnace wall, and plays a role in improving the overall strength of the furnace wall 1. Since the tie rod 2 is arranged on the inner side of the furnace wall and does not pass through the furnace wall plate, after the installation of the entire equipment is completed, the tie rod 2 does not need to be removed, saving the previous process of blocking the opening. Also, since there is no need to remove the tie rod 2, the internal insulation structure can be completed before installation, avoiding high-altitude work to install the insulation structure, so the entire installation process is more convenient.

[0050] Specifically, a heat insulating gasket 24 is provided between the connecting seat 21 and the bottom plate 26, and the first stud 22 passes through the column 11, the bottom plate 26, the heat insulating gasket 24 and the connecting seat 21 in sequence. The heat insulating gasket 24 can reduce the heat transfer from the tie rod 2 and the connecting seat 21 to the furnace wall plate, thereby improving the heat insulation effect.

[0051] In this embodiment, the end of the pull rod 2 is provided with an external thread, and the end of the pull rod 2 passes through the connecting seat 21 and is fixed by a locking nut 25. The detachable connection structure between the pull rod 2 and the connecting seat 21 is convenient for installation.

[0052] A primary casting lining area 51 is provided below the fixed structure, and a secondary casting lining area 52 is provided at the connection between the tie rod 2 and the fixed structure.

[0053] Example 2

[0054] The second specific implementation of a heating furnace with a pull rod in this embodiment, the main technical scheme of this embodiment is the same as that of embodiment 1, and the features not explained in this embodiment are explained in embodiment 1, and will not be repeated here. The difference between this embodiment and embodiment 1 is that, see Figure 7 , Figure 8 and Fig. 9 As shown, the connecting seat 21 and the pull rod 2 are an integrated structure, which can be integrally cast or welded. The integrated structure can first fix the pull rod 2 and the mounting seat into a whole, and then install the whole to the inner side of the furnace wall, which is also very convenient to install.

[0055] Example 3

[0056] The third specific implementation of a heating furnace with a pull rod 2 in this embodiment, the main technical scheme of this embodiment is the same as that of embodiment 1, and the features not explained in this embodiment are explained in embodiment 1, and will not be repeated here. The difference between this embodiment and embodiment 1 is that a different fixing structure is designed, see Fig.10 , Fig.11 and Fig.12 As shown, the fixing structure includes a lug 31 and a "Y"-shaped transition piece 32, the lug 31 is fixed to the column 11 by a second stud 33 and a second nut 34, the opening of the transition piece is fixed to the lug 31 by a third stud 35 and a third nut 36, the transition piece 32 is fixedly connected to the pull rod 2, and a heat insulation gasket 37 is provided between the transition piece 32 and the lug 31 and is sleeved on the third stud 35.

[0057] In this embodiment, the pull rod 2 and the transition piece 32 are an integrated structure. The integrated structure allows the pull rod 2 and the mounting seat to be fixed as a whole, and then the whole is installed on the inner side of the furnace wall, and the installation is also very convenient.

[0058] Example 4

[0059] The fourth specific implementation of a heating furnace with a pull rod in this embodiment, the main technical scheme of this embodiment is the same as that of embodiment 1, and the features not explained in this embodiment are explained in embodiment 1, and will not be repeated here. The difference between this embodiment and embodiment 1 is that a different fixing structure is designed, see Fig.13 , Fig.14 and Fig.15 As shown, the fixing structure includes a lug 31 and a "U"-shaped transition piece 41, the lug 31 is fixed to the column 11 by a fourth stud 42 and a fourth nut 43, the opening of the transition piece 41 is fixed to the lug 31 by a fifth stud 44 and a fifth nut 45, the transition piece 41 is fixedly connected to the pull rod 2, and a heat insulation gasket 46 is provided between the transition piece 41 and the lug 31 and is sleeved on the fifth stud 44.

[0060] In this embodiment, the end of the pull rod 2 is provided with an external thread, and the end of the pull rod 2 is fixed by a nut after passing through the transition piece. The detachable connection structure between the pull rod 2 and the connecting seat 21 is convenient for installation.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A heating furnace with a tie rod, comprising a furnace wall located on the peripheral side for enclosing a chamber, characterized in that: The furnace wall comprises columns and furnace wall panels, the peripheral side portions of the furnace wall panels are partially laminated and welded to the columns, a tie rod and a fixing structure are arranged between the opposite columns, the tie rod is arranged on the inner side of the furnace wall, the tie rod is fixed to the columns and does not pass through the furnace wall panels, and both ends of the tie rod are fixed to the portions of the columns not covered by the furnace wall panels through the fixing structure; A heat-insulating gasket capable of reducing heat transfer between the pull rod and the furnace wall plate is arranged in the fixing structure.

2. A heating furnace with a tie rod according to claim 1, characterized in that: The fixing structure includes a base plate and a connecting seat with an "Ω"-shaped cross-section. The two sides of the connecting seat are fixed to the column by a first stud and a first nut. The base plate is arranged between the connecting seat and the column. The first stud passes through the column, the base plate and the connecting seat in sequence. The end of the pull rod is fixed to the top of the connecting seat.

3. A heating furnace with a tie rod according to claim 2, characterized in that: A heat-insulating gasket is arranged between the connecting seat and the bottom plate, and the first stud passes through the column, the bottom plate, the heat-insulating gasket and the connecting seat in sequence.

4. A heating furnace with a tie rod according to claim 2, characterized in that: The end of the pull rod is provided with an external thread, and the end of the pull rod passes through the connecting seat and is fixed by a locking nut.

5. The heating furnace with a tie rod according to claim 2, characterized in that: The connecting seat and the pull rod are an integrated structure.

6. A heating furnace with a tie rod according to claim 1, characterized in that: The fixing structure includes a lug and a "Y"-shaped transition piece, the lug is fixed to the column by a second stud and a second nut, the opening of the transition piece is fixed to the lug by a third stud and a third nut, the transition piece is fixedly connected to the pull rod, and a thermal insulation gasket is provided between the transition piece and the lug and is sleeved on the third stud.

7. A heating furnace with a tie rod according to claim 6, characterized in that: The pull rod and the transition piece are an integrated structure.

8. The heating furnace with a tie rod according to claim 1, characterized in that: The fixing structure includes a lug and a "U"-shaped transition piece, the lug is fixed to the column by a fourth stud and a fourth nut, the opening of the transition piece is fixed to the lug by a fifth stud and a fifth nut, the transition piece is fixedly connected to the pull rod, and a thermal insulation gasket is provided between the transition piece and the lug and is sleeved on the fifth stud.

9. A heating furnace with a tie rod according to claim 8, characterized in that: The end of the pull rod is provided with an external thread, and the end of the pull rod passes through the transition piece and is fixed by a nut.

10. A heating furnace with a tie rod according to any one of claims 1 to 9, characterized in that: A primary cast lining is arranged below the fixed structure, and a secondary cast lining is arranged at the connection between the pull rod and the fixed structure.

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