A vertical concentrator reboiler

Abstract

The utility model discloses a vertical concentrator reboiler, and relates to the technical field of reboilers. The utility model comprises a cylinder, a heat exchange zone, and an upper head and a lower head respectively arranged at the upper and lower ends of the cylinder. The heat exchange zone comprises a heat exchange tube, a baffle for improving the heat exchange effect, a distance tube, and an upper tube sheet and a lower tube sheet respectively sealed and arranged at the upper and lower ends of the cylinder. The vertical concentrator reboiler of the utility model has unique advantages. The vertical structural form is adopted, which is conducive to maintaining the boiling in the tube as a nucleate boiling or a circulation state, maintaining the boiling heat transfer coefficient to the maximum, and can also quickly drain the condensate, further reduce the liquid film thickness, and improve the condensation heat transfer coefficient; the utility model is provided with an anti-impact baffle at the steam inlet, in order to prevent the impact of steam on the weld and the direct flushing of the steam on the tube to cause the vibration instability and corrosion of the tube, which has a good protective effect on the vertical concentrator reboiler.

Description

Technical Field

[0001] The utility model relates to the technical field of reboilers, in particular to a vertical concentrating reboiler. Background Art

[0002] Boiling heat transfer equipment is a commonly used equipment in chemical processes. In chemical processes, the heat exchanger installed at the bottom of the distillation tower to vaporize the bottom product is usually called a reboiler. Most reboilers are shell and tube heat exchangers. According to different needs in actual production, the boiling process can occur in both the shell side and the tube side.

[0003] In the conventional reboiler used in the existing chemical production, the liquid medium flows directly into the heat exchange tube after entering the upper tube box, resulting in a fast flow rate of the liquid and low heat exchange efficiency, which makes the vaporization effect unsatisfactory. In addition, the heat exchange effect is good at the periphery of the heat exchange tube close to the outer wall, while the heat exchange efficiency is poor near the center of the heat exchange tube, which will cause the heat exchange efficiency of the reboiler to be low. Traditionally, in order to obtain better vaporization efficiency, the length of the heat exchange tube can only be extended. The tube length of the reboiler is usually limited by the height of the tower skirt and the heat transfer area, making it difficult to repair and clean. When the boiling point is higher, the steam generation rate will be lower and the production cost will also be higher. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides a vertical concentrator reboiler to solve the problems existing in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vertical concentrating reboiler comprises a cylinder, a heat exchange area, and an upper head and a lower head respectively arranged at the upper and lower ends of the cylinder. The heat exchange area comprises heat exchange tubes, baffles for improving heat exchange effect, a distance tube, and an upper tube plate and a lower tube plate respectively sealed and arranged at the upper and lower ends of the cylinder.

[0007] Preferably, the cylinder consists of an upper cylinder and a lower cylinder connected by an expansion joint.

[0008] Preferably, the cylinder is provided with a condensate outlet, a steam inlet and a vent at intervals along its height direction in the heat exchange zone.

[0009] Preferably, the upper tube plate is connected to the upper cylinder and the upper head via a first flange, and the lower tube plate is connected to the lower cylinder and the lower head via a second flange.

[0010] Preferably, baffles are arranged on the fixed moment tube at intervals along the height direction of the cylinder.

[0011] Preferably, the heat exchange tube extends along the axial direction of the cylinder, passes through the baffle, and the upper and lower ends of the heat exchange tube are respectively installed on the upper tube plate and the lower tube plate and penetrate the upper tube plate and the lower tube plate. The upper tube plate and the lower tube plate are provided with through holes, and the heat exchange tube is expanded and installed in the through holes.

[0012] Preferably, the upper end of the distance tube is fixedly arranged on the upper tube plate, and the bottom end of the distance tube is sleeved on the pull rod fixed on the baffle by a nut. The distance tube is a round tube with a hollow cylindrical structure and a diameter larger than the pull rod.

[0013] Preferably, the baffles are arranged along the radial direction of the cylinder, and one baffle is connected to at least two distance tubes.

[0014] Preferably, ear seats are symmetrically arranged on the surface of the cylinder.

[0015] Preferably, an anti-collision baffle is provided at the steam inlet.

[0016] Technical effects and advantages of the utility model:

[0017] (1) The vertical concentrator reboiler provided by the utility model has unique advantages. The vertical structure is conducive to maintaining the boiling in the tube in a nucleate boiling or circulation state, maintaining the boiling heat transfer coefficient at the maximum, and can also quickly discharge the condensate, further reducing the liquid film thickness and improving the condensation heat transfer coefficient;

[0018] (2) The utility model arranges multiple groups of baffles on the fixed-moment tube at intervals along the height direction of the cylinder, which effectively increases the length of the shell-side fluid flow path, improves the heat exchange effect and supports the heat exchange tube;

[0019] (3) The utility model is provided with an anti-impact baffle at the steam inlet to prevent the steam from impacting the weld and directly flushing the pipe to cause vibration instability and corrosion of the pipe, which has a good protective effect on the vertical concentrator reboiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall structure diagram of the utility model;

[0021] Figure 2 It is a plan view of the utility model;

[0022] In the figure: 1. lower cylinder; 2. upper cylinder; 3. lower head; 4. first flange; 5. second flange; 6. expansion joint; 7. baffle; 8. distance tube; 9. heat exchange tube; 10. ear seat; 11. upper tube sheet; 12. upper head; 13. impact baffle; 14. tie rod; 15. liquid inlet; 16. condensate outlet; 17. steam inlet; 18. vent; 19. liquid outlet; 20. lower tube sheet. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0024] In the description of the present utility model, it should be understood that the terms "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] like Figure 1As shown, the utility model provides a vertical concentrating reboiler, including a cylinder, a lower end cap 3, a heat exchange zone and an upper end cap 12. The cylinder is composed of an upper cylinder 2 and a lower cylinder 1 connected by an expansion joint 6, which is used to compensate for the additional stress caused by the temperature difference between the upper and lower cylinders and the heat exchange tube 9. The upper end cap 12 is provided at the upper end of the upper cylinder 2, and the shape of the upper end cap 12 is a conical end cap. A liquid outlet 19 is provided on the upper end cap 12. The lower end cap 3 is provided at the lower end of the lower cylinder 1, and a liquid inlet 15 is provided on the lower end cap 3. The upper tube sheet 11 and the lower tube sheet 20 are sealed at the upper and lower ends of the cylinder, which are used to form a sealed heat exchange zone together with the cylinder. Condensate outlets 16, steam inlets 17 and vents 18 are provided on the cylinder at intervals along the height direction of the heat exchange zone. The vent 18 is used to exhaust the air in the shell when the reboiler is running. Baffles 7, spacer tubes 8 and heat exchange tubes 9 are provided in the heat exchange zone.

[0027] The upper tube sheet 11 is connected to the upper cylinder 2 and the upper head 12 via the first flange 4 , and the lower tube sheet 20 is connected to the lower cylinder 1 and the lower head 3 via the second flange 5 .

[0028] Baffles 7 are arranged at intervals on the fixed-moment tube 8 along the height direction of the cylinder to increase the length of the shell-side fluid flow, improve the heat exchange effect and support the heat exchange tube. The heat exchange tube 9 extends along the axial direction of the cylinder. The heat exchange tube 9 passes through the baffle 7. The upper and lower ends of the heat exchange tube 9 are respectively installed on the upper tube sheet 11 and the lower tube sheet 20 and penetrate the upper tube sheet 11 and the lower tube sheet 20. The upper tube sheet 11 and the lower tube sheet 20 are provided with through holes, and the heat exchange tube 9 is expanded and installed in the through holes.

[0029] The upper end of the distance tube 8 is fixed on the upper tube plate 11, and the bottom end of the distance tube 8 is sleeved on the tie rod 14 fixed on the baffle 7 by a nut. The distance tube 8 is a round tube with a hollow cylindrical structure and a diameter greater than the tie rod 14, and is used to axially evenly space multiple baffles 7 to prevent axial movement of the baffles 7.

[0030] The baffle 7 is fixed on the distance tube 8 by welding, and the number of the distance tube 8 can be set to multiple, and one baffle 7 is connected to at least two distance tubes 8, and the baffle 7 is arranged along the radial direction of the cylinder, and a steam channel is arranged between the baffle 11 and the inner wall of the cylinder, and the steam channels on the two adjacent baffles 7 are respectively arranged on the left and right sides of the cylinder, so that the steam flows in the heat exchange area in an S shape. The number of heat exchange tubes 9 can be set to multiple.

[0031] The ear seats 10 are symmetrically arranged on the surface of the cylinder, and the plane in which they are located is perpendicular to the central axis of the cylinder to maintain the vertical installation of the vertical concentrating reboiler; an anti-impact baffle 13 is arranged at the steam inlet 17 to prevent the impact of steam on the weld and the direct scouring of the pipe by steam to cause vibration instability and corrosion of the pipe, which has a good protective effect on the vertical concentrating reboiler.

[0032] like Figure 2 As shown, multiple groups of heat exchange tubes 9 are arranged along the direction extending from the steam inlet 17 to the vent 18, and each group of heat exchange tubes 9 includes 3 heat exchange tubes 9 arranged in an equilateral triangle. The number of heat exchange tubes 9 ranges from a few to hundreds, and the specific number should be selected according to the volume of the cylinder and the heat exchange load requirement of the vertical concentrator reboiler. The heat exchange tubes 9 are made of TA2, which has excellent heat transfer performance, good corrosion resistance, erosion resistance and wear resistance, as well as good strength and rigidity, which can improve the heat exchange power of the vertical concentrator reboiler and increase the effective heat exchange area.

[0033] When the utility model is in use, the feed liquid enters the heat exchange tube 9 from the feed liquid inlet 15 at the bottom of the lower cylinder 1, and the high-temperature steam enters the cylinder from the steam inlet 17, and exchanges heat with the feed liquid in the heat exchange tube 9, heating and vaporizing the feed liquid, and the vaporized gaseous medium is discharged from the feed liquid outlet 19 of the upper cylinder 2 to be collected by the vertical concentrator reboiler, and the steam is discharged from the condensed water outlet 16 after heat exchange. When the internal air pressure is too high, the air pressure in the cylinder can be released through the vent 18, thereby ensuring the normal operation of the cylinder.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical concentrator reboiler, characterized in that: The invention comprises a cylinder, a heat exchange area, and an upper head (12) and a lower head (3) respectively arranged at the upper and lower ends of the cylinder. The heat exchange area comprises a heat exchange tube (9), a baffle (7) for improving the heat exchange effect, a distance tube (8), and an upper tube plate (11) and a lower tube plate (20) respectively sealed at the upper and lower ends of the cylinder.

2. The vertical concentrator reboiler according to claim 1, characterized in that: The cylinder body is composed of an upper cylinder body (2) and a lower cylinder body (1) connected via an expansion joint (6).

3. The vertical concentrator reboiler according to claim 1, characterized in that: The cylinder is provided with a condensate outlet (16), a steam inlet (17) and a vent (18) at intervals along its height direction in the heat exchange area.

4. The vertical concentrator reboiler according to claim 1, characterized in that: The upper tube plate (11) is connected to the upper cylinder (2) and the upper head (12) via a first flange (4), and the lower tube plate (20) is connected to the lower cylinder (1) and the lower head (3) via a second flange (5).

5. The vertical concentrator reboiler according to claim 1, characterized in that: Baffles (7) are arranged on the distance tube (8) at intervals along the height direction of the cylinder.

6. The vertical concentrator reboiler according to claim 1, characterized in that: The heat exchange tube (9) extends along the axial direction of the cylinder, passes through the baffle (7), and the upper and lower ends of the heat exchange tube (9) are respectively installed on the upper tube plate (11) and the lower tube plate (20) and penetrate the upper tube plate (11) and the lower tube plate (20). The upper tube plate (11) and the lower tube plate (20) are provided with through holes, and the heat exchange tube (9) is expanded and installed in the through holes.

7. The vertical concentrator reboiler according to claim 1, characterized in that: The upper end of the distance tube (8) is fixedly arranged on the upper tube plate (11), and the lower end of the distance tube (8) is sleeved on a tie rod (14) fixed on the baffle (7) by a nut. The distance tube (8) is a round tube with a hollow cylindrical structure and a diameter greater than that of the tie rod (14).

8. The vertical concentrator reboiler according to claim 1, characterized in that: The baffles (7) are arranged along the radial direction of the cylinder, and one baffle (7) is connected to at least two distance tubes (8).

9. The vertical concentrator reboiler according to claim 1, characterized in that: Ear seats (10) are also symmetrically arranged on the surface of the cylinder.

10. The vertical concentrating reboiler according to claim 3, characterized in that: An impact baffle (13) is provided at the steam inlet (17).

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