A flexible thin tube sheet vertical waste heat boiler

Abstract

The present invention discloses a vertical flexible thin tube sheet waste heat boiler, which relates to the technical field of waste heat boilers and aims to solve the problem that the tube sheet is easily damaged. The vertical flexible thin tube sheet waste heat boiler includes a tube box, a tube sheet, a shell side cylinder body and a first riser tube located in the tube box. One end of the first riser tube penetrates through the tube sheet and communicates with the space enclosed by the tube sheet and the shell side cylinder body. The other end of the first riser tube penetrates through the tube box and extends out, and the water vapor in the shell side cylinder body is led out through the first riser tube. The first riser tube is sealed with packing or connected through a flexible member between the first riser tube and the tube box, and / or, the first riser tube is sealed with packing or connected through a flexible member between the first riser tube and the tube sheet. The expansion deformation of at least one of the tube box, the first riser tube and the tube sheet is borne by the sealing member or the flexible member sealed with packing. The vertical flexible thin tube sheet waste heat boiler provided by the present invention is used to utilize the high-temperature logistics in the production process as a heat source to produce steam.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat boilers, and particularly to a flexible thin tube sheet vertical waste heat boiler. Background Art

[0002] A waste heat boiler, also known as a residual heat boiler, is a heat exchange device that uses high-temperature logistics in the production process as a heat source to produce steam. During the operation of a vertical fire tube waste heat boiler, from the lower end to the upper end of the shell side cylinder, the steam content gradually increases and the water content gradually decreases. As a result, near the upper tube sheet, if the design is improper, there is likely to be a phenomenon where there is only steam and almost no water, that is, the steam collection phenomenon at the upper end of the waste heat boiler. Once the steam collection phenomenon occurs, the heat transfer efficiency in this area will drop sharply, and at the same time, the temperatures of the heat exchange tubes and the upper tube sheet will rise sharply, easily causing damage to the tube sheet and tube explosion, resulting in damage to the waste heat boiler. Summary of the Invention

[0003] The purpose of the present invention is to provide a flexible thin tube sheet vertical waste heat boiler to improve the service life and reliability of the waste heat boiler.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A flexible thin tube sheet vertical waste heat boiler includes a tube box, a tube sheet, a shell side cylinder, and a first riser tube located in the tube box. One end of the first riser tube penetrates through the tube sheet and communicates with the space enclosed by the tube sheet and the shell side cylinder. The other end of the first riser tube penetrates through the tube box and extends out of the tube box, and the water vapor in the shell side cylinder is discharged through the first riser tube; the first riser tube and the tube box are sealed with packing or connected through a flexible member, and / or, the first riser tube and the tube sheet are sealed with packing or connected through a flexible member; the expansion deformation of at least one of the tube box, the first riser tube, and the tube sheet is borne by the sealing member or the flexible member for packing seal.

[0006] Compared with the prior art, in the flexible thin tube sheet vertical waste heat boiler provided by the present invention, one end of the first riser tube penetrates through the tube sheet and communicates with the space enclosed by the tube sheet and the shell side cylinder, and the other end penetrates through the tube box and extends out of the tube box, so that the water vapor inside the shell side cylinder can be discharged through the first riser tube, preventing damage to the tube sheet and tube explosion caused by steam collection inside the shell side cylinder, and improving the service life of the waste heat boiler; secondly, since the water vapor will move upward under the action of thermosiphon, when adopting the above structure, one end of the first riser tube is connected to the tube sheet and the other end opens upward, so that the water vapor inside the shell side cylinder can move upward along the inside of the first riser tube under the action of thermosiphon, further improving the discharge rate of the water vapor and effectively solving the steam collection problem of the waste heat boiler.

[0007] Based on the above structure, when there is a packing seal or connection through a flexible member between the first riser tube and the tube sheet, and / or between the first riser tube and the tube header, the packing seal or flexible member can bear the thermal expansion deformation of at least one of the tube header, the first riser tube, and the tube sheet, preventing deformation and damage of the tube header, the first riser tube, and the tube sheet after thermal expansion, and further improving the service life and reliability of the waste heat boiler.

[0008] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, the number of the first riser tubes is one, and the first riser tube is located at the center of the tube sheet;

[0009] Or, the number of the first riser tubes is multiple, and the multiple first riser tubes are arranged around the center position of the tube sheet. With such an arrangement, the discharge rate of water vapor in the shell side cylinder can be increased.

[0010] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, when the number of the first riser tubes is multiple, the multiple first riser tubes are evenly distributed around the center position of the tube sheet. With such an arrangement, the discharge rate of water vapor in the shell side cylinder can be further increased.

[0011] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, the flexible member includes a first part and a second part. The first part is connected to the first riser tube, one end of the second part is connected to the first part, and the other end is connected to the tube header or the tube sheet. There is an included angle between the first part and the second part. With such an arrangement, the ability of the flexible member to bear deformation can be further improved, preventing deformation and damage of the tube header, the first riser tube, and the tube sheet after thermal expansion.

[0012] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, the second part is an arc-shaped structural member. With such an arrangement, taking advantage of the strong ability of the arc-shaped structure to bear deformation, the ability of the flexible member to bear deformation can be further improved.

[0013] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, a baffle is provided at the fire-facing surface position of the first riser tube to block the erosion of the high-temperature medium on the first riser tube by the baffle. With such an arrangement, the erosion of the high-temperature medium on the first riser tube can be blocked by the baffle, further improving the service life of the first riser tube.

[0014] Optionally, in the above flexible thin tube sheet vertical waste heat boiler, a high-temperature medium inlet for the high-temperature medium to enter the inside of the tube header is provided on the tube header, and the opening direction of the high-temperature medium inlet is perpendicular to the surface of the baffle. With such an arrangement, the baffle is arranged facing the high-temperature medium inlet, and the erosion of the high-temperature medium on the first riser tube can be fully blocked.

[0015] Optionally, in the above-mentioned flexible thin tube sheet vertical waste heat boiler, a second riser is provided at one end of the shell side cylinder body close to the tube sheet to discharge the water vapor in the shell side cylinder body through the second riser. With this arrangement, the water vapor in the shell side cylinder body can be further discharged through the second riser, and the discharge rate of the water vapor in the shell side cylinder body can be increased.

[0016] Optionally, in the above-mentioned flexible thin tube sheet vertical waste heat boiler, a steel plate is provided at a position on the tube sheet close to the first riser to increase the stiffness of the tube sheet around the first riser through the steel plate. With this arrangement, the service life of the tube sheet can be further improved.

[0017] Optionally, in the above-mentioned flexible thin tube sheet vertical waste heat boiler, there are multiple steel plates, and the multiple steel plates are evenly distributed around the axis of the first riser; or, the steel plate is an annular steel plate sleeved outside the first riser. With this arrangement, the stiffness and service life of the tube sheet can be further improved. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of a vertical waste heat boiler using a flexible member in an embodiment of the present invention;

[0020] Figure 2 is Figure 1 an enlarged schematic diagram at A;

[0021] Figure 3 is a schematic diagram of a vertical waste heat boiler using a packing seal in an embodiment of the present invention;

[0022] Figure 4 is Figure 3 an enlarged schematic diagram at B.

[0023] Reference Signs:

[0024] 1 - tube box, 2 - tube sheet, 3 - shell side cylinder body, 4 - first riser, 5 - flexible member, 6 - baffle, 7 - second riser, 8 - downcomer, 9 - heat exchange tube, 10 - high temperature medium inlet, 11 - refractory lining, 12 - steel plate, 13 - seal, 14 - pressing block, 15 - positioning block. Detailed Embodiments

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. "Several" means one or more unless otherwise specifically defined.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "connected to" 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 directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Generally, there is a problem of steam collection at the upper tube sheet of a vertical fire-tube waste heat boiler. If the problem of steam collection at the upper tube sheet cannot be properly solved, film boiling will occur at the upper tube sheet and the adjacent tube bundle, resulting in damage to the upper tube sheet and the adjacent tube bundle due to overheating. Currently, common solutions include inclining the furnace wall, setting a flexible tube sheet and installing riser tubes on the furnace wall, and setting a water spray nozzle, etc. However, when using the method of inclining the furnace wall, steam collection at the high point will still form, which can relieve steam collection but cannot completely solve the problem. When using the method of setting a flexible tube sheet and installing riser tubes on the furnace wall, it is only applicable to boilers with a small volume. When using the method of setting a water spray nozzle, it is easy to cause damage to the tube sheet due to uneven pipe layout. In addition, when riser tubes are arranged in the tube box and are connected to the tube sheet for exhaust, due to the different thermal expansion directions of the riser tubes and the tube box or the tube sheet, deformation will occur after the riser tubes, the tube box or the tube sheet are heated and expanded, affecting the service life of the waste heat boiler.

[0031] Please refer to Figures 1 to 4 , the flexible thin tube sheet vertical waste heat boiler provided by the embodiment of the present invention includes a tube box 1, a tube sheet 2, a shell-side cylinder 3 and a first riser tube 4 located in the tube box 1. One end of the first riser tube 4 penetrates through the tube sheet 2 and communicates with the space enclosed by the tube sheet 2 and the shell-side cylinder 3. The other end of the first riser tube 4 penetrates through the tube box 1 and extends out, and the water vapor in the shell-side cylinder 3 is led out through the first riser tube 4. The first riser tube 4 is sealed with packing or connected through a flexible member 5 between the first riser tube 4 and the tube box 1, and / or, the first riser tube 4 is sealed with packing or connected through a flexible member 5 between the first riser tube 4 and the tube sheet 2. The expansion deformation of at least one of the tube box 1, the first riser tube 4 and the tube sheet 2 is borne by the sealing member 13 or the flexible member 5 for packing seal.

[0032] It should be noted that the tube box 1, the tube sheet 2 and the shell-side cylinder 3 in this embodiment can be connected in sequence along the vertical direction, or the tube box 1 can be connected to the shell-side cylinder 3, and the tube sheet 2 is fixed in the tube box 1 or the shell-side cylinder 3. The first riser tube 4 can be an integral structure with the tube sheet 2 or can be separately arranged. Packing seal is also called sealing packing, which is usually woven from relatively soft linear materials. Usually, the cross-section is a square, rectangular or circular strip-shaped object filled in the sealing cavity. When packing seal is used between the first riser tube 4 and the tube box 1 or the tube sheet 2, it can not only prevent water vapor from leaking between the first riser tube 4 and the tube box 1 or between the first riser tube 4 and the tube sheet 2, but also enable the sealing member 13 for packing seal to absorb the deformation after the first riser tube 4 and the tube box 1 or the first riser tube 4 and the tube sheet 2 are heated and expanded, preventing damage to the first riser tube 4, the tube box 1 and the tube sheet 2. A high-temperature medium inlet 10 for high-temperature medium to enter the tube box 1 is provided on the tube box 1 in this embodiment. Heat exchange tubes 9 are arranged in the shell-side cylinder 3, through holes are provided on the tube sheet 2, and the heat exchange tubes 9 pass through the through holes and communicate with the inside of the tube box 1.

[0033] During specific implementation: The high-temperature medium enters from the high-temperature medium inlet 10 on the tube sheet 1, flows into the heat exchange tubes 9 through the holes on the tube sheet 2, and uses the heat exchange tubes 9 to transfer heat to the external water, so that saturated water and saturated water vapor are formed in the shell-side cylinder 3. The water vapor moves upward and floats to the tube sheet 2, and then is discharged to the external steam drum through the first riser 4, thereby preventing the accumulation of water vapor at the tube sheet 2. The high-temperature medium in this embodiment is high-temperature gas.

[0034] From the structure and specific implementation process of the above-mentioned flexible thin tube sheet vertical waste heat boiler, it can be seen that one end of the first riser 4 penetrates the tube sheet 2 and communicates with the space enclosed by the tube sheet 2 and the shell-side cylinder 3, and the other end penetrates the tube box 1 and extends out of the tube box 1, so that the water vapor inside the shell-side cylinder 3 can be discharged through the first riser 4, preventing damage to the tube sheet 2 and tube explosion caused by steam accumulation inside the shell-side cylinder 3, and improving the service life of the waste heat boiler; Secondly, since the water vapor will move upward under the action of thermosiphon, when the above structure is adopted, one end of the first riser 4 is connected to the tube sheet 2 and the other end opens upward, so that the water vapor in the shell-side cylinder 3 can move upward along the inside of the first riser 4 under the action of thermosiphon, further improving the discharge rate of the water vapor and effectively solving the problem of steam accumulation in the waste heat boiler.

[0035] Based on the above structure, when the first riser 4 is connected to the tube box 1 by packing seal or through a flexible member 5, and / or when the first riser 4 is connected to the tube sheet 2 by packing seal or through a flexible member 5, the packing seal 13 or the flexible member 5 can bear the expansion deformation of at least one of the tube box 1, the first riser 4 and the tube sheet 2, preventing deformation and damage of the tube box 1, the first riser 4 and the tube sheet 2 after thermal expansion, and further improving the service life and reliability of the waste heat boiler.

[0036] Specifically, the seal 13 of the packing seal is a woven linear material. When the packing seal is used between the first riser 4 and the header 1, the seal 13 of the packing seal is located between the first riser 4 and the header 1. After the first riser 4 and the header 1 are heated and expanded, they will squeeze the seal 13, and the seal 13 will deform freely under force, enabling the first riser 4 and the header 1 to expand freely after being heated without being squeezed against each other and causing deformation. When the first riser 4 and the header 1 are connected by the flexible member 5, the flexible characteristics of the flexible member 5 can be utilized to transfer the expansion energy of the first riser 4 and the header 1 to the flexible member 5, and the expansion of the first riser 4 and the header 1 can be absorbed through the deformation of the flexible member 5, so that the first riser 4 and the header 1 will not be squeezed against each other and cause deformation after being heated. When the packing seal is used between the first riser 4 and the tube sheet 2, the seal 13 of the packing seal is located between the first riser 4 and the tube sheet 2. After the first riser 4 and the tube sheet 2 are heated and expanded, they will squeeze the seal 13, and the seal 13 will deform freely under force, enabling the first riser 4 and the tube sheet 2 to expand freely after being heated without being squeezed against each other and causing deformation. When the first riser 4 and the tube sheet 2 are connected by the flexible member 5, the flexible characteristics of the flexible member 5 can be utilized to transfer the expansion energy of the first riser 4 and the tube sheet 2 to the flexible member 5, and the expansion of the first riser 4 and the tube sheet 2 can be absorbed through the deformation of the flexible member 5, so that the first riser 4 and the tube sheet 2 will not be squeezed against each other and cause deformation after being heated.

[0037] In addition, since the medium in the first riser 4 is a steam-water mixture, when the first riser 4 is in the high-temperature environment of the header 1, when heat is transferred from the tube wall of the first riser 4 to the inside of the tube, a phase change reaction of water converting into steam will occur inside the first riser 4, realizing the conversion and transfer of heat. Since a phase change reaction occurs inside the tube, the temperature in the first riser 4 will not be too high, so that the first riser 4 will not be damaged due to high temperature. Among them, in this embodiment, the temperature inside the first riser 4 can be calculated by the numerical analysis method to be only 50°C to 80°C higher than the saturated water temperature. The numerical analysis method is to use computer software to perform stress analysis, process analysis and temperature field analysis through numerical simulation to obtain the temperature inside the first riser 4.

[0038] As a possible implementation manner, the first riser 4 is arranged near the center position of the tube sheet 2. Since the steam accumulation is the most serious at the center position of the tube sheet 2, when the first riser 4 is arranged near the center position of the tube sheet 2, the discharge rate of water vapor can be increased, preventing the accumulation of water vapor. Specifically, as Figure 1As shown, when the number of the first riser tubes 4 is one, the first riser tube 4 is located at the center position of the tube sheet 2. When the number of the first riser tubes 4 is multiple, the multiple first riser tubes 4 are arranged around the center position of the tube sheet 2. With this structure, the discharge rate of water vapor in the shell-side cylinder 3 can be fully increased, and the problem of steam accumulation at the tube sheet 2 can be effectively prevented. Preferably, the first riser tube 4 is arranged perpendicular to the surface of the tube sheet 2, that is, preferably the first riser tube 4 is arranged vertically in this embodiment to improve the exhaust efficiency of the first riser tube 4.

[0039] In an alternative manner, when the number of the first riser tubes 4 is multiple, the multiple first riser tubes 4 are evenly distributed around the center position of the tube sheet 2, that is, the multiple first riser tubes 4 are evenly distributed in the circumferential direction and form an annular structure, and the center position of the tube sheet 2 is located at the center of the annular structure. With this structure, by exhausting gas through multiple riser tubes at the same time, and the multiple riser tubes can evenly discharge the gas near the tube sheet 2, so that the discharge rate of water vapor in the shell-side cylinder 3 can be further increased, and the accumulation of water vapor at the tube sheet 2 can be effectively prevented.

[0040] As Figure 4 shown, in this embodiment, a positioning block 15 is fixedly connected to the tube header 1. A sealing member 13 with packing seal is arranged between the positioning block 15 and the outer wall of the first riser tube 4. A transverse protrusion is arranged at the bottom of the positioning block 15, and the sealing member 13 is stacked on the transverse protrusion. This embodiment further includes a pressing block 14. The pressing block 14 includes a base and a top rod. The top rod extends into the space between the positioning block 15 and the outer wall of the first riser tube 4 and abuts against the sealing member 13. The base is detachably connected to the positioning block 15, preferably by screw connection, so as to tightly press the sealing member 13 through the cooperation of the pressing block 14 and the transverse protrusion, so that the sealing member 13 is tightly pressed between the positioning block 15 and the outer wall of the first riser tube 4 to achieve good sealing.

[0041] As a possible implementation manner, the flexible member 5 includes a first part and a second part. The first part is connected to the first riser tube 4, one end of the second part is connected to the first part, and the other end is connected to the tube header 1 or the tube sheet 2. An included angle exists between the first part and the second part. By optimizing the structure of the flexible member 5, when the first riser tube 4 and the tube header 1 are heated and expanded to apply forces to both ends of the flexible member 5, or the first riser tube 4 and the tube sheet 2 are heated and expanded to apply forces to both ends of the flexible member 5, the thermal expansion can be absorbed by deforming the first part and the second part to reduce the included angle between them, so that the ability of the flexible member 5 to bear deformation can be further improved, and deformation and damage of the tube header 1, the first riser tube 4 and the tube sheet 2 after thermal expansion can be prevented.

[0042] In some embodiments, the second part is an arc-shaped structural member. Since the arc-shaped structure has a strong ability to bear bending deformation, when the first riser 4 and the header 1 expand due to heat and apply forces to both ends of the flexible member 5, or when the first riser 4 and the tube sheet 2 expand due to heat and apply forces to both ends of the flexible member 5, the second part can absorb the thermal expansion by means of bending deformation, thereby further improving the ability of the flexible member 5 to bear deformation and preventing the header 1, the first riser 4, and the tube sheet 2 from being deformed and damaged after thermal expansion.

[0043] To prevent the first riser 4 from being damaged due to the erosion of high-temperature medium, in this embodiment, a baffle 6 is provided at the fire-facing surface position of the first riser 4 to block the erosion of the high-temperature medium on the first riser 4. With this structure, the baffle 6 is arranged between the first riser 4 and the high-temperature medium inlet 10 of the header 1. The baffle 6 can make the high-temperature gas medium in the header 1 as evenly distributed as possible, protect the heated surface of the outer surface of the central tube through the baffle 6, prevent the high-temperature gas medium from eroding the first riser 4, so that the first riser 4 does not exchange heat too quickly, thereby preventing the high-temperature damage of the first riser 4 and improving the service life of the first riser 4.

[0044] In an alternative manner, a high-temperature medium inlet 10 for the high-temperature medium to enter the interior of the header 1 is provided on the header 1, and the opening direction of the high-temperature medium inlet 10 is perpendicular to the surface of the baffle 6. With this structure, the baffle 6 is arranged facing the high-temperature medium inlet 10, which can fully block the erosion of the high-temperature medium on the first riser 4. In this embodiment, it is preferably that the high-temperature medium inlet 10 is horizontally arranged, and the baffle 6 is closely attached to the outer wall of the first riser 4 in the vertical direction.

[0045] As a possible implementation, a second riser 7 is provided at one end of the shell-side cylinder 3 close to the tube sheet 2 to discharge the water vapor in the shell-side cylinder 3 through the second riser 7. With this structure, the water vapor in the shell-side cylinder 3 can be further discharged through the second riser 7, and the discharge rate of the water vapor in the shell-side cylinder 3 can be improved. In this embodiment, a plurality of second risers 7 are arranged on the shell-side cylinder 3 in the circumferential direction to fully improve the exhaust efficiency of the second riser 7; in addition, since one end of the first riser 4 is connected to the tube sheet 2 and the other end is connected to the header 1 for exhaust, the second riser 7 does not need to be set as high as possible in order to discharge the water vapor, preventing the structure stability of the waste heat boiler from being affected when the position of the second riser 7 is too high.

[0046] In an alternative embodiment, a countercurrent component is provided inside the shell-side cylinder 3 for increasing the flow velocity of the steam-water mixture at a local position. Since the steam inside the shell-side cylinder 3 will move to the upper tube sheet 2 and increase the local flow velocity of the steam-water mixture through the countercurrent component, it avoids the formation of a dead layer of steam and prevents the formation of a gas film on the heating surface, thus preventing film boiling and improving the service life of the waste heat boiler. At the same time, since the local flow velocity of the steam-water mixture inside the shell-side cylinder 3 increases, the second riser 7 does not need to be set as high as possible in order to discharge more steam and water, further improving the safety of the waste heat boiler.

[0047] As a possible implementation, a steel plate 12 is provided at a position on the tube sheet 2 close to the first riser 4 to increase the stiffness of the tube sheet 2 around the first riser 4 through the steel plate 12. When the tube sheet 2 expands due to heat, the deformation at the connection position between the tube sheet 2 and the first riser 4 can be consistent with the deformation around the first riser 4 on the tube sheet 2, preventing the tube sheet 2 from cracking due to uneven self-deformation and further improving the service life of the tube sheet 2.

[0048] In some embodiments, a plurality of steel plates 12 are provided, and the plurality of steel plates 12 are evenly distributed around the axis of the first riser 4; or, the steel plate 12 is an annular steel plate sleeved outside the first riser 4. By adopting this structure, the strength of the tube sheet 2 in the circumferential direction can be further increased, thereby further improving the stiffness and service life of the tube sheet 2.

[0049] In addition, a downcomer 8 is also provided on the shell-side cylinder 3. After the steam is discharged from the second riser 7, it can be condensed into water, and then the water is introduced into the shell-side cylinder 3 through the downcomer 8 for reuse, enabling the steam and water to be recycled, saving materials and reducing costs. A refractory lining 11 is provided on the inner wall of the header 1, which can improve the heat resistance and fire prevention ability of the inner wall of the header 1.

[0050] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flexible thin tube sheet vertical waste heat boiler, comprising a tube box, a tube sheet and a shell side cylinder, characterized in that, It further includes a first riser tube located inside the tube sheet box. One end of the first riser tube penetrates through the tube sheet and is communicated with the space enclosed by the tube sheet and the shell side cylinder body. The other end of the first riser tube penetrates through the tube sheet box and extends out, and the water vapor in the shell side cylinder body is led out through the first riser tube; the first riser tube is sealed with packing or connected by a flexible member between the first riser tube and the tube sheet box, and / or, the first riser tube is sealed with packing or connected by a flexible member between the first riser tube and the tube sheet; the expansion deformation of at least one of the tube sheet box, the first riser tube and the tube sheet is borne by the packing seal or the flexible member; A baffle is arranged at the fire-facing surface position of the first riser tube to block the erosion of the high-temperature medium on the first riser tube through the baffle; A second riser tube is arranged at one end of the shell side cylinder body close to the tube sheet to lead out the water vapor in the shell side cylinder body through the second riser tube; A steel plate is arranged at a position on the tube sheet close to the first riser tube to improve the stiffness of the tube sheet around the first riser tube through the steel plate.

2. The flexible thin tube sheet vertical waste heat boiler according to claim 1, characterized in that, The number of the first riser tubes is one, and the first riser tube is located at the central position of the tube sheet; Or, the number of the first riser tubes is multiple, and the multiple first riser tubes are arranged around the central position of the tube sheet.

3. The flexible thin tube sheet vertical waste heat boiler according to claim 2, wherein When the number of the first riser tubes is multiple, the multiple first riser tubes are evenly distributed around the central position of the tube sheet.

4. The vertical waste heat boiler with a flexible thin tube sheet according to claim 1, characterized in that, The flexible member includes a first part and a second part. The first part is connected to the first riser tube. One end of the second part is connected to the first part, and the other end is connected to the tube sheet box or the tube sheet. There is an included angle between the first part and the second part.

5. The vertical waste heat boiler with a flexible thin tube sheet according to claim 4, characterized in that, The second part is an arc-shaped structural member.

6. The vertical waste heat boiler with a flexible thin tube sheet according to claim 1, characterized in that, A high-temperature medium inlet for the high-temperature medium to enter the interior of the tube sheet box is arranged on the tube sheet box, and the opening direction of the high-temperature medium inlet is perpendicular to the surface of the baffle.

7. The vertical waste heat boiler with a flexible thin tube sheet according to claim 1, characterized in that, There are multiple steel plates, and the multiple steel plates are evenly distributed around the axis of the first riser tube; Or, the steel plate is an annular steel plate sleeved outside the first riser tube.

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