Fire tube anti-floating reboiler

Abstract

The utility model relates to the technical field of dehydration and regeneration of natural gas, and provides a fire tube anti-floating reboiler. The fire tube anti-floating reboiler comprises a barrel and a fire tube, the fire tube is arranged in the barrel and connected with the barrel, the fire tube extends in the horizontal direction, a pressing assembly is arranged on the barrel and comprises a connecting piece and a crimping piece, the connecting piece is arranged at the position, corresponding to the fire tube, of the top of the barrel, one end of the crimping piece is connected with the connecting piece, and the other end of the crimping piece is connected with the barrel. And the other end is abutted against and matched with the top of the fire tube. According to the fire tube anti-floating reboiler provided by the invention, the downward pressure can be applied to the fire tube through the crimping piece to prevent the fire tube from floating upwards, so that the reboiler can run stably, the diameter of the fire tube is not limited by the buoyancy which can be borne by the fire tube any more, the single-set treatment capacity can be increased, the dehydration efficiency can be improved, and the production requirement can be met.

Description

Technical Field

[0001] The present application relates to the technical field of natural gas dehydration and regeneration, and in particular to a fire tube anti-floating reboiler. Background Art

[0002] The triethylene glycol dehydration process is one of the most commonly used dehydration methods in the natural gas industry. In recent years, the demand for gas has continued to increase, and the requirements for the processing capacity of a single unit have also become increasingly higher.

[0003] The reboiler is the core component in the triethylene glycol regeneration process. There is usually a fire tube inside the reboiler. The inlet of the fire tube is connected to the burner and the outlet is connected to the chimney. The flame and flue gas of the burner can heat the triethylene glycol rich liquid inside the reboiler after passing through the fire tube.

[0004] Due to the increase in the processing capacity of a single set of triethylene glycol dehydration and regeneration units, the diameter of the fire tube has continued to increase. After the unit was put into operation, as triethylene glycol entered the reboiler, the buoyancy of the fire tube was greater than its own gravity, causing it to float. However, due to the limitations of the reboiler's internal structure and processing technology, the fire tube could not be effectively connected inside the reboiler. Only the inlet and outlet were connected to the large flange cover of the reboiler. After the fire tube floated, it was easy to cause a series of problems such as leakage and deformation at the connection. Utility Model Content

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a fire tube anti-floating reboiler.

[0006] The present application provides a fire tube anti-floating reboiler, comprising a cylinder and a fire tube, wherein the fire tube is arranged in the cylinder and connected to the cylinder, and the fire tube is extended in the horizontal direction;

[0007] A compression assembly is provided on the cylinder, and the compression assembly includes a connecting piece and a crimping piece. The connecting piece is provided at a position corresponding to the fire tube at the top of the cylinder, one end of the crimping piece is connected to the connecting piece, and the other end abuts against the top of the fire tube.

[0008] Optionally, the connecting piece includes a hollow tube body, an opening is provided on the cylinder, the hollow tube body passes through the opening, and at least part of the hollow tube body is located outside the cylinder, the crimping piece is passed through the inside of the hollow tube body, and abuts against the top of the fire tube.

[0009] Optionally, the connector further includes a sealing cover, which is provided on an end of the hollow tube body located outside the cylinder and away from the opening, and an end of the crimping member away from the fire tube is connected to the sealing cover.

[0010] Optionally, one end of the crimping member away from the fire tube is detachably connected to the sealing cover.

[0011] Optionally, the sealing cover includes a first cover body and a second cover body;

[0012] The second cover is fixedly arranged at an end of the hollow tube located outside the cylinder and away from the opening, and the first cover and the second cover are connected by a fastener passing through the first cover and the second cover;

[0013] A first gasket is provided on one end of the crimping member facing the sealing cover, and the first gasket is detachably positioned between the first cover body and the second cover body.

[0014] Optionally, a second gasket is provided at one end of the crimping member facing the fire tube, the second gasket is an arc-shaped gasket, and the arc-shaped gasket is arranged to fit the outer side wall of the fire tube.

[0015] Optionally, the fire tube is bent to form a first bent section and a second bent section arranged side by side, and the first bent section and the second bent section are connected by a connecting section;

[0016] An inlet and an outlet are provided on the cylinder. An end of the first bending section away from the connecting section is communicated with the inlet, and an end of the second bending section away from the connecting section is communicated with the outlet.

[0017] Optionally, there are two clamping assemblies, and the two clamping assemblies are respectively arranged at positions on the top of the cylinder corresponding to the axes of the first bending section and the second bending section.

[0018] Optionally, the cylinder includes a cylinder body and a cover body, the cylinder body is extended in a horizontal direction, the cover body is provided to cover one end of the cylinder body in the extension direction, and the fire tube is connected to the cover body.

[0019] Optionally, the fire tube anti-floating reboiler further includes a reinforcement ring, which is sleeved on the outside of the cylinder.

[0020] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0021] The fire tube anti-floating reboiler provided by the present application includes a cylinder and a fire tube. The fire tube is arranged in the cylinder and connected to the cylinder, and the fire tube is extended in the horizontal direction. The fire tube can resist its own gravity through buoyancy when there is no effective connection, and can keep the fire tube horizontal to a certain extent. A clamping assembly is provided on the cylinder, and the clamping assembly includes a connecting piece and a crimping piece. The connecting piece is provided at a position corresponding to the fire tube at the top of the cylinder, one end of the crimping piece is connected to the connecting piece, and the other end is abutted against the top of the fire tube. That is to say, downward pressure can be applied to the fire tube through the crimping piece. Even if the weight of the fire tube itself is less than the buoyancy, the crimping piece can prevent the fire tube from floating upward, so that the reboiler can operate smoothly. At the same time, the diameter of the fire tube is no longer limited by the buoyancy it can withstand, thereby increasing the processing capacity of a single set, improving the dehydration efficiency, and meeting production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a front view of a fire tube anti-floating reboiler according to an embodiment of the present invention;

[0025] Figure 2 This is a side view of a fire tube anti-floating reboiler according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic structural diagram of a connecting piece according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of a crimping piece according to an embodiment of the present invention.

[0028] In the figure: 1. Cylinder; 11. Cylinder body; 12. Cover; 2. Fire tube; 21. First bending section; 22. Second bending section; 23. Connecting section; 3. Connecting piece; 31. Hollow tube; 32. Sealing cover; 321. First cover; 322. Second cover; 4. Crimping piece; 41. First gasket; 42. Second gasket; 5. Reinforcement ring. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0031] The fire tube anti-floating reboiler is described in detail below through specific embodiments:

[0032] Reference Figures 1 to 4 As shown, some embodiments of the present invention provide a fire tube anti-floating reboiler, including a cylinder 1 and a fire tube 2. The fire tube 2 is arranged in the cylinder 1 and connected to the cylinder 1, and the fire tube 2 is extended in the horizontal direction. When there is no effective connection, the fire tube 2 can resist its own gravity through buoyancy, so that the fire tube 2 can remain horizontal to a certain extent.

[0033] In specific implementation, a compression assembly is provided on the cylinder 1, comprising a connector 3 and a crimping member 4. The connector 3 is provided at the top of the cylinder 1 at a position corresponding to the fire tube 2. One end of the crimping member 4 is connected to the connector 3, while the other end abuts against the top of the fire tube 2. In other words, the crimping member 4 can apply downward pressure to the fire tube 2. Even if the weight of the fire tube 2 itself is less than its buoyancy, the crimping member 4 can prevent the fire tube 2 from floating upward, allowing the reboiler to operate smoothly. At the same time, the diameter of the fire tube 2 is no longer limited by the buoyancy it can withstand, thereby increasing the processing capacity of a single set and improving dehydration efficiency to meet production needs.

[0034] Specifically, the fire tube 2 is extended in the horizontal direction and can be subjected to an upward buoyancy. The clamping assembly is arranged at the top of the fire tube 2 and can apply a downward limiting force to the fire tube 2. When the limiting force, the buoyancy and its own gravity are balanced, the fire tube 2 can remain horizontal, thereby avoiding deformation or leakage at the connection between the fire tube 2 and the cylinder 1 due to the floating of the fire tube 2.

[0035] In some embodiments, reference Figure 2 and Figure 3As shown, the connector 3 includes a hollow tube 31. The cylinder 1 has an opening through which the hollow tube 31 passes, with at least a portion of the hollow tube 31 located outside the cylinder 1. The crimping piece 4 is inserted into the hollow tube 31 and engages with the top of the fire tube 2. This arrangement allows the crimping piece 4 to enter the reboiler directly by inserting it into the hollow tube 31 from the outside, without disrupting the reboiler's internal structure. The crimping piece 4 then abuts against the top of the fire tube 2, applying resistance to the fire tube 2 to prevent it from floating upward. This arrangement results in a simple structure and easy installation.

[0036] Specifically, the hollow tube body 31 and the cylinder body 1 can be connected by welding to ensure the sealing of the cylinder body 1 while stabilizing the connection and avoiding problems such as leakage. The fixing effect is good and the processing difficulty is low.

[0037] It can be understood that the hollow tube body 31 is inserted into the opening, part of the hollow tube body 31 is located inside the cylinder 1, part of the hollow tube body 31 is located outside the cylinder 1, and part of the hollow tube body 31 can abut against the inner wall surface of the opening. Such an arrangement can avoid deformation of the opening on the cylinder 1 and the cylinder 1, thereby ensuring the structural strength of the cylinder 1.

[0038] Reference Figure 3 As shown, the connector 3 also includes a sealing cover 32, which is provided on the end of the hollow tube body 31 located outside the cylinder 1 and away from the opening, so as to seal the inside and outside of the cylinder 1 through the sealing cover 32, thereby preventing leakage and preventing external impurities from entering. The end of the crimping part 4 away from the fire tube 2 is connected to the sealing cover 32, and the crimping part 4 can also be fixed by the sealing cover 32, so that the fire tube 2 can be limited by the crimping part 4.

[0039] It can be understood that the crimping part 4 is supported between the sealing cover 32 and the fire tube 2. When the connecting part 3 is fixed to the outside of the cylinder 1, a limiting force can be applied to the crimping part 4, and the limiting force can be transmitted to the fire tube 2 through the crimping part 4. The buoyancy of the triethylene glycol rich liquid is offset by the limiting force, thereby preventing the fire tube 2 from floating and enabling the reboiler to operate stably.

[0040] In some embodiments, the end of the crimping member 4 away from the fire tube 2 is detachably connected to the sealing cover 32. The crimping member 4 can be assembled on the connecting member 3 according to actual needs to apply resistance to the fire tube 2 to prevent it from floating up when the fire tube 2 is subjected to greater buoyancy.

[0041] Specifically, the sealing cover 32 includes a first cover body 321 and a second cover body 322; the second cover body 322 is fixedly arranged at the end of the hollow tube body 31 located outside the cylinder 1 and away from the opening, and the first cover body 321 and the second cover body 322 are connected by fasteners passing through the first cover body 321 and the second cover body 322, that is, the first cover body 321 and the second cover body 322 are detachably connected, so that when the first cover body 321 and the second cover body 322 are separated, the crimping part 4 can enter the interior of the cylinder 1 and abut against the fire tube 2. After the crimping part 4 enters the cylinder 1, the first cover body 321 can be connected to the second cover body 322 to seal the hollow tube body 31 and realize the sealing of the cylinder 1.

[0042] Reference Figure 2 and Figure 4 As shown, a first gasket 41 is provided at one end of the crimping member 4 facing the sealing cover 32, and the first gasket 41 is detachably restrained between the first cover 321 and the second cover 322. It is understood that when the first gasket 41 abuts between the first cover 321 and the second cover 322, the first cover 321 and the second cover 322 can restrain the first gasket 41, thereby fixing the first gasket 41 between the first cover 321 and the second cover 322. The crimping member 4 can be fixed relative to the cylinder 1, thereby continuously and stably applying a restraining force to the fire tube 2.

[0043] In specific implementation, the connecting piece 3 is fixed to the outside of the cylinder 1. When one end of the crimping piece 4 is connected to the connecting piece 3, the position of the crimping piece 4 is fixed relative to the cylinder 1, and the other end can provide a stable limiting effect to the fire tube 2, thereby preventing the fire tube 2 from floating up.

[0044] Of course, it should be noted that the sealing cover 32 can also be a structure of other forms, and this application does not limit this. As long as it can be set on the outside of the hollow tube body 31 and connected to the crimping part 4, so that the crimping part 4 can be fixed relative to the cylinder 1 and apply a stable limiting force to the fire tube 2, it will be fine.

[0045] In some embodiments, reference Figure 4 As shown, a second gasket 42 is provided on the end of the crimping member 4 facing the fire tube 2. The second gasket 42 is an arc-shaped gasket that is arranged to fit closely to the outer wall of the fire tube 2. It will be appreciated that the second gasket 42 fits the fire tube 2, ensuring a sufficient contact area between the second gasket 42 and the fire tube 2, thereby ensuring uniform force on the fire tube 2 and preventing damage to the fire tube 2 due to excessive local force.

[0046] In some embodiments, reference Figure 2 and Figure 3As shown, the fire tube 2 is bent to form a first bending section 21 and a second bending section 22 arranged side by side. The first bending section 21 and the second bending section 22 are connected by a connecting section 23, that is, the fire tube 2 can be formed into a U-shaped tube body. The inlet and outlet of the fire tube 2 for the entry and exhaust of flames and smoke are formed on the same side of the U-shaped tube body. The inlet and outlet are opened on the cylinder 1. The end of the first bending section 21 away from the connecting section 23 is connected to the inlet, and the end of the second bending section 22 away from the connecting section 23 is connected to the outlet.

[0047] In other words, the burner flame and flue gas enter the first bend section 21 of the fire tube 2 through the inlet, pass through the connecting section 23 and the second bend section 22, and then exit through the outlet. As the flame and flue gas pass through the fire tube 2, they heat the TEG-rich liquid within the cylinder 1, thereby dehydrating and regenerating the natural gas. Furthermore, the U-shaped tube disposed within the cylinder 1 increases the contact area between the fire tube 2 and the TEG-rich liquid compared to a straight tube, thereby improving production efficiency.

[0048] In a specific implementation, there are two clamping assemblies, each of which is disposed at a position corresponding to the axis of the first bend section 21 and the second bend section 22 at the top of the cylinder 1. This allows the two clamping assemblies to correspond to the first bend section 21 and the second bend section 22, respectively, and independently apply resistance to prevent the first bend section 21 and the second bend section 22 from floating upward. Specifically, the two clamping assemblies are disposed at the same position along the extension direction of the cylinder 1, so that the fire tube 2 is evenly stressed, ensuring smooth operation of the reboiler.

[0049] In some embodiments, the cylinder 1 includes a cylinder body 11 and a cover 12. The cylinder body 11 extends horizontally, and the cover 12 covers one end of the cylinder body 11 along the extension direction. The fire tube 2 is connected to the cover 12. In a specific implementation, the cover 12 is provided with an inlet and an outlet, which are sequentially connected to the first bend section 21 and the second bend section 22. The cylinder body 11 forms a relatively complete closed structure, which can ensure the normal operation of the dehydration and regeneration process.

[0050] Reference Figure 1 As shown, the fire tube 2 is arranged horizontally, one end of the fire tube 2 is connected to the cover body 12, and the clamping assembly abuts against the other end of the fire tube 2. Under the buoyancy and the limiting force of the clamping assembly, the fire tube 2 can maintain a horizontal state, thereby ensuring a stable connection between the fire tube 2 and the cover body 12, avoiding deformation or leakage at the connection between the fire tube 2 and the cover body 12 due to the floating of the fire tube 2.

[0051] In some embodiments, reference Figure 1 and Figure 2As shown, the fire tube anti-floating reboiler further includes a reinforcement ring 5, which is sleeved on the outside of the cylinder 1. Specifically, the reinforcement ring 5 is arranged near the weld between the connector 3 and the opening of the cylinder 1 to meet the opening reinforcement calculation requirements of the cylinder 1 pressure vessel. The reinforcement ring 5 is made of rolled steel and fixed to the outside of the cylinder 1 by welding. It also avoids increasing the overall thickness of the cylinder 1 due to the opening, achieving the purpose of cost saving.

[0052] Reference Figure 1 As shown, there are two reinforcement rings 5 , which are respectively arranged on both sides of the opening of the cylinder 1 along the extending direction of the cylinder 1 to improve the structural strength of the cylinder 1 .

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0054] The above are merely specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to these embodiments herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A fire tube anti-floating reboiler, characterized in that: It comprises a cylinder (1) and a fire tube (2), wherein the fire tube (2) is arranged in the cylinder (1) and connected to the cylinder (1), and the fire tube (2) is extended in the horizontal direction; The cylinder (1) is provided with a compression assembly, which comprises a connecting piece (3) and a crimping piece (4). The connecting piece (3) is provided at a position corresponding to the fire tube (2) at the top of the cylinder (1). One end of the crimping piece (4) is connected to the connecting piece (3), and the other end is in abutment with the top of the fire tube (2).

2. The fire tube anti-floating reboiler according to claim 1, characterized in that: The connecting piece (3) comprises a hollow tube (31), an opening is provided on the cylinder (1), the hollow tube (31) passes through the opening, and at least a portion of the hollow tube (31) is located outside the cylinder (1), and the crimping piece (4) is passed through the interior of the hollow tube (31) and abuts against the top of the fire tube (2).

3. The fire tube anti-floating reboiler according to claim 2, characterized in that: The connecting member (3) further comprises a sealing cover (32), the sealing cover (32) being arranged on an end of the hollow tube (31) located outside the cylinder (1) and away from the opening, and the end of the crimping member (4) away from the fire tube (2) is connected to the sealing cover (32).

4. The fire tube anti-floating reboiler according to claim 3, characterized in that: One end of the crimping piece (4) away from the fire tube (2) is detachably connected to the sealing cover (32).

5. The fire tube anti-floating reboiler according to claim 4, characterized in that: The sealing cover (32) comprises a first cover body (321) and a second cover body (322); The second cover (322) is fixedly arranged at an end of the hollow tube (31) located outside the cylinder (1) and away from the opening, and the first cover (321) and the second cover (322) are connected by a fastener passing through the first cover (321) and the second cover (322); A first gasket (41) is provided at one end of the crimping member (4) facing the sealing cover (32), and the first gasket (41) is detachably positioned between the first cover body (321) and the second cover body (322).

6. The fire tube anti-floating reboiler according to any one of claims 1 to 5, characterized in that: A second gasket (42) is provided at one end of the crimping piece (4) facing the fire tube (2); the second gasket (42) is an arc-shaped gasket, and the arc-shaped gasket is arranged in contact with the outer side wall of the fire tube (2).

7. The fire tube anti-floating reboiler according to any one of claims 1 to 5, characterized in that: The fire tube (2) is bent to form a first bending section (21) and a second bending section (22) arranged side by side, and the first bending section (21) and the second bending section (22) are connected via a connecting section (23); An inlet and an outlet are provided on the cylinder (1); an end of the first bending section (21) away from the connecting section (23) is connected to the inlet, and an end of the second bending section (22) away from the connecting section (23) is connected to the outlet.

8. The fire tube anti-floating reboiler according to claim 7, characterized in that: There are two pressing assemblies, and the two pressing assemblies are respectively arranged at positions corresponding to the axes of the first bending section (21) and the second bending section (22) at the top of the cylinder (1).

9. The fire tube anti-floating reboiler according to any one of claims 1 to 5, characterized in that: The cylinder (1) comprises a cylinder body (11) and a cover body (12); the cylinder body (11) is extended in a horizontal direction; the cover body (12) is covered at one end of the cylinder body (11) in the extension direction; and the fire tube (2) is connected to the cover body (12).

10. The fire tube anti-floating reboiler according to any one of claims 1 to 5, characterized in that: The fire tube anti-floating reboiler further comprises a reinforcement ring (5), and the reinforcement ring (5) is sleeved on the outside of the cylinder (1).

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