Glass tube heat exchanger suitable for containing sulfur trioxide

Abstract

The invention discloses a heat exchanger suitable for a glass tube containing sulfur trioxide, and particularly relates to the technical field of sulfuric acid preparation heat exchange, the heat exchanger suitable for the glass tube containing sulfur trioxide is characterized in that the heat exchanger comprises a heat exchanger main frame, the bottom of the heat exchanger main frame is provided with a through hole for sulfur trioxide steam to enter and sulfuric acid liquid to flow down, and the through hole is communicated with the heat exchanger main frame. A process gas outlet is formed in the top of the heat exchanger main frame, a heat exchange cavity is formed in the heat exchanger main frame, a detachable modularized heat exchange module is arranged in the heat exchange cavity, and heat exchange is conducted on sulfur trioxide steam passing through the heat exchange module through a cooling medium circulating in the heat exchange module; the sulfuric acid corrosion resistance of the heat exchanger can be effectively improved through the PFA lining and the modified PTFE spraying pore plate, the heat exchanger is easy to install and deploy in various spaces through the detachable modularized heat exchange module, a fault module can be rapidly positioned and replaced during maintenance, the downtime is remarkably shortened, and the production continuity is powerfully guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange in sulfuric acid preparation, and specifically to a glass tube heat exchanger adapted to sulfur trioxide. Background Art

[0002] In many fields such as chemical production, heat exchange processes involving sulfuric acid media are often involved. Due to the strong corrosiveness of sulfuric acid, ordinary heat exchangers are extremely vulnerable to corrosion and damage after contacting sulfuric acid, resulting in shortened equipment life and increased maintenance costs, seriously affecting the continuity and stability of production. Traditional metal material heat exchangers are difficult to meet the requirements of working in a sulfuric acid environment for a long time. Although some corrosion-resistant metal materials are expensive, and even when using these materials, the corrosion problem is still difficult to completely solve under harsh sulfuric acid conditions such as high concentration and high temperature. And some existing non-metal heat exchangers have problems such as low heat exchange efficiency and inconvenient installation and maintenance, and cannot well meet the actual needs of industrial production. Therefore, we propose a glass tube heat exchanger and method adapted to sulfur trioxide to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a glass tube heat exchanger and method adapted to sulfur trioxide to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A glass tube heat exchanger adapted to sulfur trioxide, characterized in that: the heat exchanger includes a main frame of the heat exchanger, and a through port for the entry of sulfur trioxide steam and the downward flow of sulfuric acid liquid is provided at the bottom of the main frame of the heat exchanger, a process gas outlet is provided at the top of the main frame of the heat exchanger, a heat exchange cavity is provided inside the main frame of the heat exchanger, and a detachable modular heat exchange module is provided inside the heat exchange cavity, and the sulfur trioxide steam passing through the heat exchange module is heat-exchanged by the cooling medium flowing inside the heat exchange module;

[0005] The heat exchange module includes a glass heat exchange tube, and the middle part of the glass heat exchange tube is in a suspended state and in contact with sulfur trioxide steam;

[0006] The middle of the glass heat exchange tube is hollow along the axial direction, and the end diameter of the glass heat exchange tube gradually becomes smaller. The glass heat exchange tube includes heat transfer blades in the hollow part and a heat exchange and heat transfer chamber in the outer ring part;

[0007] The heat transfer blades extend along the axial direction, and the heat transfer blades are provided with mixing connection holes penetrating through the heat transfer blades. The inside of the heat exchange and heat transfer chamber is hollow and in a vacuum state. The end of the heat exchange and heat transfer chamber is in a spiral shape adapted to the end of the glass heat exchange tube, and a cooling working medium for vaporization heat transfer is filled in the heat exchange and heat transfer chamber, and a liquid absorption core for guiding the cooling working medium to the middle of the glass heat exchange tube is provided at the inside of the heat exchange and heat transfer chamber;

[0008] Inside the main frame of the heat exchanger, there is a first conveying line for conveying a cooling medium inside the glass heat exchange tube and a second conveying line for cooling the ends of the glass heat exchange tubes.

[0009] Preferably, the heat exchange module further includes modified PTFE spray hole plates on both sides. The modified PTFE spray hole plates are provided with inwardly penetrating mounting ear holes. The mounting ear holes are sleeved with PFA tube sleeves and welded on both sides. The glass heat exchange tubes are inserted into the PFA tube sleeves, and the ends of the glass heat exchange tubes extend out of the modified PTFE spray hole plates.

[0010] The ends of the modified PTFE spray hole plates are in contact with the inner wall of the main frame of the heat exchanger, forming an inner annular channel for the heat exchange of sulfur trioxide vapor. And the part where the main frame of the heat exchanger contacts the modified PTFE spray hole plate to form the inner ring is provided with a PFA lining.

[0011] Preferably, there are two groups of heat exchange chambers in the upper part of the main frame of the heat exchanger. Inside the lower part of the main frame of the heat exchanger, there is an inverted triangular collecting chamber. The bottom of the heat exchange chamber is communicated with the top of the collecting chamber, and the bottom of the collecting chamber is communicated with a through port.

[0012] Inside the collecting chamber, there is a sealing partition plate that can separately seal the heat exchange chamber. The sealing partition plate is in the middle of the through port, and its heat exchange chambers are all in an open state.

[0013] Preferably, a driving rotating shaft is rotatably connected inside the collecting chamber. The sealing partition plate is installed on the driving rotating shaft. Inside the lower part of the collecting chamber, there is an arc-shaped part that fits the outer circle rotation track of the sealing partition plate. At the upward end of the collecting chamber, there is a limiting inner convex part that limits the rotation of the sealing partition plate.

[0014] Preferably, the main frame of the heat exchanger includes a top end plate installed at the top by bolts and a mounting plate installed on the front of the upper part of the main frame of the heat exchanger by bolts. PFA linings are provided at the contact parts of the mounting plate and the top end plate with sulfur trioxide vapor.

[0015] Preferably, the second conveying line includes an air inlet chamber for blowing air upward from bottom to top provided in the lower part of the main frame of the heat exchanger. The air inlet chamber is located outside the collecting chamber, and an output through port at the top of the main frame of the heat exchanger.

[0016] A U-shaped cooling chamber is formed between the outside of the heat exchange module and the inner wall of the main frame of the heat exchanger. The air inlet chamber is communicated with the bottom of one end of the cooling chamber, and the output through port is communicated with the top of the other end of the cooling chamber.

[0017] Preferably, the first conveying line includes transfer conveying cavities on the left and right sides of the main frame of the heat exchanger, a centralized cavity between two groups of heat exchange cavities, and a connecting assembly for connecting the glass heat exchange tubes to the transfer conveying cavity and the centralized cavity respectively. An input notch is penetrated and provided in the upper part outside the transfer conveying cavity, and an output notch is penetrated and provided in the lower part at the rear of the centralized cavity.

[0018] Preferably, the connecting assembly includes a shunt cone, a connecting pipe, a positioning joint, a connecting sleeve, and a connecting head.

[0019] The positioning joint is installed on the inner wall of the main frame of the heat exchanger and is respectively communicated with the transfer conveying cavity and the centralized cavity. The two ends of the connecting sleeve are respectively threadedly connected with the positioning joint and the connecting head. The connecting head is installed on the outer side surface of the shunt cone, and the connecting pipe is installed on the inner side surface of the shunt cone.

[0020] Preferably, the end of the connecting pipe is inserted into the end of the glass heat exchange tube. An installation connecting column is installed outside the installation ear hole. The shunt cone is installed at the end of the installation connecting column through bolts, and a rubber sealing pad is provided at the insertion part. The connecting pipe and the connecting head are both communicated with the inside of the shunt cone;

[0021] Both ends of the connecting sleeve are provided with inwardly recessed threaded installation ring holes. The ends of the connecting pipe and the connecting head both extend into the threaded installation ring holes and are threadedly connected with the connecting sleeve.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. For the glass tube heat exchanger adapted to sulfur trioxide, the PFA lining and the modified PTFE sprayed orifice plate can effectively improve its sulfuric acid corrosion resistance. And through its detachable modular heat exchange module, it is easy to install and deploy in various spaces. During maintenance, the faulty module can be quickly located and replaced, significantly shortening the downtime and effectively ensuring the production continuity.

[0024] 2. For the glass tube heat exchanger adapted to sulfur trioxide, through the cooperation of the cooling working medium, the heat transfer blades and the mixed flow connection holes inside the heat exchange and heat transfer chamber, the effect of multiple heat exchanges can be achieved. And under the action of the cooling working medium inside the heat exchange and heat transfer chamber, the subsequent cooling medium temperature of the glass heat exchange tube can be avoided from being too high, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] Figure 1 Structural schematic diagram of the present invention;

[0027] Figure 2 Structural schematic diagram of the rear view in the present invention;

[0028] Figure 3 Structural schematic diagram of the front view opened in the present invention;

[0029] Figure 4 Structural schematic diagram of the front view cross-section in the present invention;

[0030] Figure 5 Structural schematic diagram of the top view opened in the present invention;

[0031] Figure 6 Structural schematic diagram of the connection of the heat exchange module in the present invention;

[0032] Figure 7 Structural schematic diagram of the cross-section of the glass heat exchange tube in the present invention;

[0033] Figure 8 Structural schematic diagram of the external cross-section of the glass heat exchange tube in the present invention;

[0034] Figure 9 Structural schematic diagram of the heat exchange and heat transfer chamber in the present invention;

[0035] Figure 10 Structural schematic diagram of the connection of the sealing partition plate in the present invention;

[0036] Figure 11 Structural schematic diagram of the cross-section of the connection of the heat exchange module in the present invention;

[0037] Figure 12 Structural schematic diagram of the connection of the modified PTFE spray orifice plate in the present invention;

[0038] Figure 13 Structural schematic diagram of location A in the present invention;

[0039] Figure 14 Structural schematic diagram of location B in the present invention.

[0040] In the figure: 1, main frame of the heat exchanger; 2, input notch; 3, process gas outlet; 4, output through port; 5, mounting plate; 6, output notch; 7, drive rotating shaft; 8, top end plate; 9, heat exchange module; 9a, modified PTFE spraying orifice plate; 9b, mounting ear hole; 9c, mounting connection column; 10, transfer cavity; 11, glass heat exchange tube; 11a, heat exchange and heat transfer chamber; 11b, heat transfer blade; 11c, mixed flow connection hole; 12, central cavity; 13, connection assembly; 13a, flow dividing cone; 13b, connecting pipe; 13c, positioning joint; 13d, connecting sleeve; 13e, connector; 14, collection cavity; 14a, arc-shaped part; 14b, limiting inner convex part; 15, sealing partition plate; 16, intake cavity; 17, PFA pipe sleeve. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Please refer to Figures 1 to 9 , the present invention provides a glass tube heat exchanger adapted to sulfur trioxide. The heat exchanger includes a main frame 1 of the heat exchanger. A through port for sulfur trioxide steam to enter and sulfuric acid liquid to flow downward is provided at the bottom of the main frame 1 of the heat exchanger. Sulfur trioxide steam enters the interior of the main frame 1 of the heat exchanger through the through hole and exchanges heat. After the sulfur trioxide steam exchanges heat, the sulfuric acid liquid flows down through the through hole. A process gas outlet 3 is provided at the top of the main frame 1 of the heat exchanger. The process gas after the sulfur trioxide steam exchanges heat is discharged from the process gas outlet 3. A heat exchange cavity is provided inside the main frame 1 of the heat exchanger. A detachable modular heat exchange module 9 is provided inside the heat exchange cavity. The sulfur trioxide steam passing through the heat exchange module 9 is exchanged heat by the cooling medium flowing inside the heat exchange module 9. That is, the sulfur trioxide steam medium flows outside the glass heat exchange tube 11, and the cooling medium flows inside the glass heat exchange tube 11, so that the cooling medium can absorb the heat of the sulfuric acid steam to achieve the heat exchange effect. When the sulfuric acid liquid flows down to the bottom of the glass heat exchange tube 11, the sulfuric acid liquid accumulated on the outer surface of the glass heat exchange tube 11 can wash to reduce the risk of impurities depositing and scaling on the heat exchange surface of the glass heat exchange tube 11, further ensuring high heat exchange efficiency;

[0043] The heat exchange module 9 includes a glass heat exchange tube 11. The middle part of the glass heat exchange tube 11 is in a suspended state and contacts with sulfur trioxide vapor. Through multiple groups of heat exchange modules 9 and the glass heat exchange tubes 11 thereon, the flow direction of sulfur trioxide vapor can be guided, avoiding direct and concentrated passage through the heat exchange cavity, having a relative effect of guiding sulfur trioxide vapor, making sulfur trioxide vapor relatively evenly fill the heat exchange cavity, ensuring relatively sufficient heat exchange of the glass heat exchange tube 11, and improving the heat exchange effect;

[0044] The middle of the glass heat exchange tube 11 is hollow along the axial direction, and the end diameter of the glass heat exchange tube 11 gradually becomes smaller, which can form an inclined surface or a curved surface to increase the contact area between the end of the glass heat exchange tube 11 and the outside. The glass heat exchange tube 11 includes heat transfer blades 11b in the hollow part and a heat exchange and heat transfer chamber 11a in the outer ring part. Through the heat transfer blades 11b, the contact area between the cooling medium and the glass heat exchange tube 11 can be increased to improve the heat exchange efficiency of the cooling medium;

[0045] The heat transfer blade 11b extends along the axial direction, and the heat transfer blade 11b is provided with a mixed flow connection hole 11c penetrating the heat transfer blade 11b. Through the communication of the mixed flow connection hole 11c, the space inside the glass heat exchange tube 11 can be connected, so as to avoid the isolation of the cooling medium flowing in the glass heat exchange tube 11, and avoid the heat concentration formed by the sulfur trioxide vapor mainly concentrating on the bottom of the glass heat exchange tube 11 when passing through the glass heat exchange tube 11. The cooling medium in the glass heat exchange tube 11 can transfer heat between them. The interior of the heat exchange chamber 11a is hollow and vacuum. The end of the heat exchange chamber 11a is spirally adapted to the end of the glass heat exchange tube 11, and the heat exchange chamber 11a is filled with a cooling medium for vaporizing heat transfer. A liquid wick for guiding the cooling medium to the middle of the glass heat exchange tube 11 is provided inside the heat exchange chamber 11a. By evacuating, the heat exchange chamber can be reduced. The boiling point of the cooling medium inside 11a makes it easier to vaporize, and it contacts with sulfur trioxide vapor through the middle section of the glass heat exchange tube 11, so that the cooling medium in the middle section of the heat exchange chamber 11a is vaporized and takes away its heat. Then, the vapor moves to the end of the glass heat exchange tube 11 under the action of air pressure, and condenses at the end of the glass heat exchange tube 11 to form liquid again. Under the action of capillary adsorption of the liquid wick, the liquid condensed at the end will flow to the middle section again, that is, heat exchange is repeated over and over. Since the latent heat of vaporization is extremely large, a large amount of heat can be transferred with a very small temperature difference, thereby achieving a better heat exchange effect. In addition, since the cooling medium flowing in the glass heat exchange tube 11 flows unidirectionally, the heat accumulated in the cooling medium increases in the subsequent flow, thereby reducing the heat exchange effect. At this time, the cooling medium can transfer the heat accumulated in the cooling medium, reducing the heat of the cooling medium in the subsequent flow, thereby improving the heat exchange effect.

[0046] The heat exchanger main frame 1 is provided with a first conveying line for conveying a cooling medium into the glass heat exchange tube 11 and a second conveying line for cooling the end of the glass heat exchange tube 11. The cooling medium can be conveyed into the glass heat exchange tube 11 through the first conveying line to perform heat exchange, and the end of the glass heat exchange tube 11 can be cooled through the second conveying line, so that a condensation area can be formed at the end of the heat exchange and heat transfer chamber 11a.

[0047] See also Figures 1 to 9 and Figures 11 to 13, the heat exchange module 9 further includes modified PTFE spray orifice plates 9a on both sides. The modified PTFE spray orifice plates 9a are provided with inwardly penetrating mounting ear holes 9b. The mounting ear holes 9b are sleeved with PFA pipe sleeves 17 and welded on both sides. The interference fit is achieved through double-sided welding to ensure the sealing performance and prevent the leakage of sulfuric acid vapor. The glass heat exchange tube 11 is inserted into the PFA pipe sleeve 17, and the end of the glass heat exchange tube 11 extends out of the modified PTFE spray orifice plate 9a, that is, the end of the glass heat exchange tube 11 is isolated from the heat exchange cavity by the modified PTFE spray orifice plate 9a, thereby avoiding the influence of the temperature of the heat exchange cavity on the condensation of the end of the glass heat exchange tube 11;

[0048] The end of the modified PTFE spray orifice plate 9a is in contact with the inner wall of the heat exchanger main frame 1 to form an inner annular channel for the heat exchange of sulfur trioxide vapor. The inner ring formed by the contact between the heat exchanger main frame 1 and the modified PTFE spray orifice plate 9a is provided with a PFA lining. PFA perfluoroalkoxy resin has excellent chemical stability, corrosion resistance and non-stickiness, which can effectively prevent the corrosion of the sulfuric acid vapor on the wall plate and ensure the long-term stable operation of the equipment.

[0049] Please refer to Figures 1 to 9 and Figures 11 to 13 , the upper part of the heat exchanger main frame 1 is provided with two groups of heat exchange cavities. The lower part of the heat exchanger main frame 1 is internally provided with an inverted triangular collecting cavity 14, which can play the role of collecting and gathering sulfuric acid liquid, making the collection of sulfuric acid more convenient. The bottom of the heat exchange cavity is communicated with the top of the collecting cavity 14, and the bottom of the collecting cavity 14 is communicated with the through port;

[0050] The collecting cavity 14 is provided with a sealing partition plate 15 that can separately seal the heat exchange cavity. The sealing partition plate 15 is in the middle of the through port, and its heat exchange cavities are all in an open state, that is, the sealing partition plate 15 can seal one heat exchange cavity, that is, only one heat exchange cavity can be in an open state at this time. At this time, the corresponding process gas outlet 3 and the mounting plate 5 can be disassembled to replace the corresponding heat exchange module 9, quickly realizing maintenance, and still being able to perform heat exchange during maintenance, ensuring the normal and continuous heat exchange. And during normal operation, both of its heat exchange cavities can be opened, so as to achieve the effect of efficient heat exchange.

[0051] Please refer to Figures 1 to 13, a transmission rotating shaft 7 is rotatably connected inside the collection chamber 14, the sealing partition plate 15 is installed on the transmission rotating shaft 7, an arc-shaped portion 14a that fits the outer circle rotation trajectory of the sealing partition plate 15 is provided inside the lower part of the collection chamber 14, and a limiting inner convex portion 14b for limiting the rotation of the sealing partition plate 15 is provided at the upward end of the collection chamber 14. When the sealing partition plate 15 rotates, the end of the sealing partition plate 15 can contact the arc-shaped portion 14a, and when the sealing partition plate 15 rotates to abut against the limiting inner convex portion 14b, the sealing partition plate 15 can close a single heat exchange chamber at this time.

[0052] Please refer to Figures 1 to 13 , the main heat exchanger frame 1 includes a top end plate 8 installed at the top by bolts, and a mounting plate 5 installed on the front of the upper part of the main heat exchanger frame 1 by bolts. PFA linings are provided at the contact positions between the mounting plate 5 and the top end plate 8 and sulfur trioxide steam. By disassembling the mounting plate 5 and the top end plate 8, the replacement and maintenance of the heat exchange module 9 can be realized.

[0053] Please refer to Figures 1 to 13 , the second conveying line includes an air inlet chamber 16 for blowing air from bottom to top provided at the lower part of the main heat exchanger frame 1, the air inlet chamber 16 is located outside the collection chamber 14, and an output port 4 at the top of the main heat exchanger frame 1;

[0054] A U-shaped cooling chamber is formed between the outer side of the heat exchange module 9 and the inner wall of the main heat exchanger frame 1. The air inlet chamber 16 is communicated with the bottom of one end of the cooling chamber, and the output port 4 is communicated with the top of the other end of the cooling chamber. Then, air can be blown from the air inlet chamber 16 to the cooling chamber, and then the end of the glass heat exchange tube 11 can be cooled to form a condensation area.

[0055] Please refer to Figures 1 to 13 , the first conveying line includes transfer chambers 10 on the left and right sides of the main heat exchanger frame 1, a central chamber 12 between two groups of heat exchange chambers, and a connection assembly 13 for connecting the glass heat exchange tubes 11 to the transfer chambers 10 and the central chamber 12 respectively. An input slot 2 is provided through the upper part of the outside of the transfer chamber 10, and an output slot 6 is provided through the lower part of the rear side of the central chamber 12. By conveying the cooling medium into the transfer chamber 10 from the input slot 2, then conveying it into the glass heat exchange tube 11, finally flowing into the central chamber 12, and outputting from the output slot 6.

[0056] Please refer to Figures 1 to 14 , the connection assembly 13 includes a shunt cone 13a, a connecting pipe 13b, a positioning joint 13c, a connecting sleeve 13d, and a connecting head 13e;

[0057] The positioning joint 13c is installed on the inner wall of the main frame 1 of the heat exchanger, and is respectively communicated with the transfer cavity 10 and the centralized cavity 12. The two ends of the connecting sleeve 13d are respectively threadedly connected with the positioning joint 13c and the connecting head 13e. Through the connection of the connecting sleeve 13d, the heat exchange module 9 can be smoothly connected to the positioning joint 13c, so that the glass heat exchange tube 11 can be communicated with the transfer cavity 10. The connecting head 13e is installed on the outer side of the flow dividing cone 13a, and the connecting pipe 13b is installed on the inner side of the flow dividing cone 13a. The cooling medium in the transfer cavity 10 is transported into the positioning joint 13c, and is transported to the flow dividing cone 13a through the connecting sleeve 13d and the connecting head 13e.

[0058] Please refer to Figures 1 to 14 , the end of the connecting pipe 13b is inserted into the end of the glass heat exchange tube 11. An installation connecting column 9c is installed on the outer side of the installation ear hole 9b. The flow dividing cone 13a is installed at the end of the installation connecting column 9c through bolts, so that the connecting component 13 can be smoothly disassembled, facilitating the maintenance of the glass heat exchange tube 11. And a rubber gasket is provided at the insertion part. The connecting pipe 13b and the connecting head 13e are both communicated with the inside of the flow dividing cone 13a;

[0059] Both ends of the connecting sleeve 13d are provided with inwardly recessed threaded installation ring holes. The ends of the connecting pipe 13b and the connecting head 13e both extend into the threaded installation ring holes and are threadedly connected with the connecting sleeve 13d.

[0060] In summary, for this glass tube heat exchanger adapted to sulfur trioxide, during use, the cooling medium is transported from the input notch 2 into the transfer cavity 10, and then the cooling medium is transported into the inside of the flow dividing cone 13a through the positioning joint 13c and the connecting head 13e, and then is transported to the inside of the glass heat exchange tube 11 through the connecting pipe 13b, and flows into the centralized cavity 12 from the connecting component 13 at the other end of the glass heat exchange tube 11, and flows out from the output notch 6. The sulfur trioxide vapor enters the collection cavity 14 from the through hole, is guided into the heat exchange cavity, and finally the heat exchange gas is discharged from the process gas outlet 3, and the condensed sulfuric acid liquid flows out from the through hole;

[0061] When the sulfur trioxide vapor passes through the glass heat exchange tube 11, it transfers heat through the glass heat exchange tube 11 to the cooling medium passing through the inside of the glass heat exchange tube 11 and takes away the heat therein. When transferring heat on the glass heat exchange tube 11, the cooling working medium inside the heat exchange and heat transfer chamber 11a evaporates. The vaporized cooling medium condenses at the end of the glass heat exchange tube 11, and under the capillary adsorption of the liquid absorption core and the guidance of gravity, the cooling working medium can flow back to the middle section of the heat exchange and heat transfer chamber 11a in the form of liquid again, and the heat transfer efficiency of the cooling medium in the glass heat exchange tube 11 can be improved by the heat transfer blades 11b which can increase the contact area of the cooling medium in the glass heat exchange tube 11;

[0062] By blowing air into the intake cavity 16 and blowing air to the end of the glass heat exchange tube 11, the end of the glass heat exchange tube 11 is air-cooled to reduce the temperature of the end of the glass heat exchange tube 11, ensuring that the cooling working fluid in the heat exchange and heat transfer chamber 11a can be smoothly condensed;

[0063] By rotating the output notch 6, driven by the rotation of the output notch 6, the sealing partition plate 15 can be rotated. When the sealing partition plate 15 abuts against the limiting inner convex portion 14b, one heat exchange cavity can be closed at this time, that is, only one heat exchange cavity can be in an open state at this time. At this time, the corresponding process gas outlet 3 and the mounting plate 5 can be disassembled to replace the corresponding heat exchange module 9, quickly realizing maintenance, and still being able to perform heat exchange during maintenance, ensuring the normal and continuous progress of heat exchange.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A glass tube heat exchanger suitable for containing sulfur trioxide, characterized in that: The heat exchanger comprises a heat exchanger main frame (1), the bottom of the heat exchanger main frame (1) is provided with a through hole for sulfur trioxide vapor to enter and sulfuric acid liquid to flow down, the top of the heat exchanger main frame (1) is provided with a process gas outlet (3), the interior of the heat exchanger main frame (1) is provided with a heat exchange cavity, the interior of the heat exchange cavity is provided with a detachable modular heat exchange module (9), and the sulfur trioxide vapor passing through the heat exchange module (9) is heat-exchanged by a cooling medium flowing inside the heat exchange module (9); The heat exchange module (9) comprises a glass heat exchange tube (11), the middle portion of the glass heat exchange tube (11) being suspended in contact with sulfur trioxide vapor; The middle of the glass heat exchange tube (11) is hollow along the axial direction, and the diameter of the end of the glass heat exchange tube (11) gradually decreases. The glass heat exchange tube (11) comprises heat transfer blades (11b) in the hollow part and a heat exchange chamber (11a) in the outer ring part; The heat transfer blade (11b) extends along the axial direction, and the heat transfer blade (11b) is provided with a mixed flow connection hole (11c) penetrating the heat transfer blade (11b); the interior of the heat exchange and heat transfer chamber (11a) is hollow and vacuum; the end of the heat exchange and heat transfer chamber (11a) is in a spiral shape adapted to the end of the glass heat exchange tube (11); the heat exchange and heat transfer chamber (11a) is filled with a cooling medium for vaporizing heat transfer; and a liquid wick for guiding the cooling medium to the middle of the glass heat exchange tube (11) is provided inside the heat exchange and heat transfer chamber (11a); The heat exchanger main frame (1) is provided with a first conveying line for conveying cooling medium in the glass heat exchange tube (11) and a second conveying line for cooling the end of the glass heat exchange tube (11).

2. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 1, characterized in that: The heat exchange module (9) further comprises modified PTFE spray-coated orifice plates (9a) on both sides, the modified PTFE spray-coated orifice plates (9a) being provided with mounting ears (9b) penetrating inward, the mounting ears (9b) being sleeved with a PFA pipe sleeve (17) and welded on both sides, the glass heat exchange tube (11) being inserted into the PFA pipe sleeve (17), and the end of the glass heat exchange tube (11) extending out of the modified PTFE spray-coated orifice plates (9a); The end of the modified PTFE sprayed orifice plate (9a) contacts the inner wall of the heat exchanger main frame (1) to form an inner ring-shaped channel for heat exchange with sulfur trioxide steam, and the heat exchanger main frame (1) contacts the modified PTFE sprayed orifice plate (9a) to form an inner ring provided with a PFA lining.

3. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 2, characterized in that: The upper part of the heat exchanger main frame (1) is provided with two groups of heat exchange chambers, and the lower part of the heat exchanger main frame (1) is provided with an inverted triangle-shaped collecting chamber (14), the bottom of the heat exchange chamber is connected to the top of the collecting chamber (14), and the bottom of the collecting chamber (14) is connected to the opening; A sealing partition plate (15) capable of sealing a heat exchange chamber independently is provided in the collecting chamber (14); the sealing partition plate (15) is located in the middle of the through opening, and the heat exchange chambers are all in an open state.

4. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 3, characterized in that: The collection chamber (14) is rotatably connected to a transmission shaft (7), the sealing partition plate (15) is mounted on the transmission shaft (7), the lower part of the collection chamber (14) is provided with an arc-shaped portion (14a) that matches the rotation trajectory of the outer ring of the sealing partition plate (15), and the collection chamber (14) is provided with a limiting inner convex portion (14b) that limits the rotation of the sealing partition plate (15) at the upward end of the collection chamber (14).

5. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 4, characterized in that: The heat exchanger main frame (1) comprises a top end plate (8) mounted on the top by bolts, and a mounting plate (5) mounted on the front side of the upper part of the heat exchanger main frame (1) by bolts, and the mounting plate (5) and the top end plate (8) are both provided with PFA linings at the places where they are in contact with sulfur trioxide steam.

6. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 4, characterized in that: The second transmission line comprises an air intake cavity (16) for supplying air from bottom to top, which is arranged at the bottom of the heat exchanger main frame (1), the air intake cavity (16) is located outside the collecting cavity (14), and an output port (4) is located at the top of the heat exchanger main frame (1); A U-shaped cooling chamber is formed between the outer side of the heat exchange module (9) and the inner wall of the heat exchanger main frame (1); the air inlet chamber (16) is connected to the bottom of one end of the cooling chamber, and the outlet port (4) is connected to the top of the other end of the cooling chamber.

7. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 4, characterized in that: The first conveying line comprises a transfer conveying cavity (10) located on the left and right sides of a heat exchanger main frame (1), a central cavity (12) located between the two groups of heat exchange cavities, and a connecting assembly (13) for connecting the glass heat exchange tube (11) to the transfer conveying cavity (10) and the central cavity (12) respectively, an input slot (2) is penetrated through the upper part of the outer side of the transfer conveying cavity (10), and an output slot (6) is penetrated through the lower part of the rear side of the central cavity (12).

8. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 7, characterized in that: The connection assembly (13) comprises a flow dividing cone (13a), a connection pipe (13b), a positioning joint (13c), a connection sleeve (13d), and a connection head (13e). The positioning joint (13c) is installed on the inner wall of the heat exchanger main frame (1), and is respectively connected to the transfer cavity (10) and the central cavity (12); the two ends of the connecting sleeve (13d) are respectively threadedly connected to the positioning joint (13c) and the connecting head (13e); the connecting head (13e) is installed on the outer side of the diverter cone (13a); and the connecting pipe (13b) is installed on the inner side of the diverter cone (13a).

9. A glass tube heat exchanger adapted to contain sulfur trioxide according to claim 8, characterized in that: The end of the connecting pipe (13b) is plugged into the end of the glass heat exchange tube (11); a mounting connecting column (9c) is installed on the outside of the mounting ear hole (9b); the diverter cone (13a) is installed on the end of the mounting connecting column (9c) by means of bolts; a rubber sealing gasket is provided at the plugging point; the connecting pipe (13b) and the connector (13e) are both connected to the inside of the diverter cone (13a); Both ends of the connecting sleeve (13d) are provided with inwardly recessed threaded mounting ring holes, and the ends of the connecting pipe (13b) and the connecting head (13e) extend into the threaded mounting ring holes and are threadedly connected to the connecting sleeve (13d).

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