Vaporization flue structure and converter system

Abstract

The present invention discloses a vaporization flue structure and a converter system, which relate to the technical field of converters. The vaporization flue structure includes: a heated tube enclosure structure, which forms a flue gas inlet, a first flue gas outlet, and a second flue gas outlet; the heated tube enclosure structure includes a first heat exchange tube unit, a second heat exchange tube unit, and a third heat exchange tube unit; a first and a second water header tank disposed at the flue gas inlet, a first collecting manifold connected to the first water header tank, and a second collecting manifold connected to the second water header tank; a third and a fourth water header tank disposed at the first flue gas outlet, a third collecting manifold connected to the third water header tank, and a fourth collecting manifold connected to the fourth water header tank, wherein the second water header tank is connected to the third water header tank via the second heat exchange tube unit; and so on. This application can meet the requirements of rapid conversion of high-temperature flue gas flow channels and achieve efficient and convenient production and processing of the heat exchange tube units in the heated tube enclosure structure.

Description

Technical Field

[0001] The present invention relates to the technical field of converters, and in particular to a vaporization flue structure and a converter system. Background Art

[0002] The converter vaporization and cooling flue is the sole conveying facility for the high-temperature section of the converter flue gas and the primary equipment in the converter's high-temperature flue gas waste heat recovery system. Currently, after the converter flue gas passes through the converter vaporization flue, the subsequent process for purifying and recovering the converter gas can include a variety of different steps, including OG dust removal, LT dust removal, full waste heat recovery, and dry dust removal.

[0003] The conventional structure of the converter vaporization flue commonly used at present is as follows: the flue structure includes: a collecting header, a lower header, a heated pipe enclosure structure, an upper header, a steam-water distribution header, a flue support, a flue hanger, a manhole, a flue gas outlet connection flange, and a flue gas outlet connection flange. Among them, the heated pipe enclosure structure is mainly composed of a heated pipe and a partition welded enclosure. The inlet and outlet of the flue gas in the high-temperature vaporization flue is a single inlet and a single outlet, and is connected to other upstream and downstream facilities respectively through the flue inlet and outlet flanges. At the same time, the high-temperature flue gas in the vaporization flue is cooled by circulating cooling water. The circulating cooling water flows as follows: from the water inlet, it enters the flue cooling water pipe through the collecting header, and after water flow distribution through the lower header, it enters the heated pipe enclosure structure to exchange heat with the high-temperature flue gas. After heat exchange, it passes through the upper header and the steam-water distribution header, and finally flows out of the vaporization flue through the water outlet.

[0004] During the upgrade process of converter gas purification and recovery technology products, some steel mills urgently need a new plant configuration structure to ensure that normal production activities are not affected during the initial or running-in period of the upgrade process. It can enable the coexistence of old and new processes, serve as backup for each other, and can be quickly converted. The existing conventional structure cannot meet the above requirements. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a vaporization flue structure and a converter system, which can meet the rapid conversion of high-temperature flue gas flow channels and can realize efficient and simple production and processing of heat exchange tube units in the heated tube enclosure structure.

[0006] The specific technical solution of the embodiment of the present invention is:

[0007] A vaporization flue structure, comprising:

[0008] A heat receiving pipe enclosure structure, wherein the heat receiving pipe enclosure structure forms a flue gas inlet, a first flue gas outlet, and a second flue gas outlet, and the heat receiving pipe enclosure structure includes a first heat exchange pipe unit, a second heat exchange pipe unit, and a third heat exchange pipe unit;

[0009] a first water collecting tank and a second water collecting tank provided at the flue gas inlet, a first collecting header connected to the first water collecting tank, and a second collecting header connected to the second water collecting tank;

[0010] a third water collecting tank and a fourth water collecting tank provided at the first flue gas outlet, a third collecting header connected to the third water collecting tank, and a fourth collecting header connected to the fourth water collecting tank, wherein the second water collecting tank is connected to the third water collecting tank via the second heat exchange tube unit;

[0011] The fifth water collecting tank and the sixth water collecting tank are arranged at the second flue gas outlet, the fifth collecting tank is connected to the fifth water collecting tank, and the sixth collecting tank is connected to the sixth water collecting tank. The fourth water collecting tank is connected to the fifth water collecting tank through the third heat exchange tube unit, and the sixth water collecting tank is connected to the first water collecting tank through the first heat exchange tube unit.

[0012] Preferably, the first collecting tank and the second collecting tank respectively surround half of the circumference of the flue gas inlet, and the first collecting tank and the second collecting tank together surround the circumference of the flue gas inlet. The first collecting tank and the first collecting tank are located at the same circumferential position of the flue gas inlet, and the second collecting tank and the second collecting tank are located at the same circumferential position of the flue gas inlet. The first collecting tank has a first port, and is connected to the first collecting tank via a plurality of first connecting pipes at different positions. The second collecting tank has a second port, and is connected to the second collecting tank via a plurality of second connecting pipes at different positions.

[0013] The third water collecting tank and the fourth water collecting tank respectively surround half of the circumference of the first flue gas outlet, and the third water collecting tank and the fourth water collecting tank together surround the circumference of the first flue gas outlet. The third collecting tank and the third water collecting tank are located at the same circumferential position of the first flue gas outlet, and the fourth collecting tank and the fourth water collecting tank are located at the same circumferential position of the first flue gas outlet. The third collecting tank has a third port and is connected to the third water collecting tank at different positions through multiple third connecting pipes. The fourth collecting tank has a fourth port and is connected to the fourth water collecting tank at different positions through multiple fourth connecting pipes.

[0014] The fifth collecting tank and the sixth collecting tank respectively surround half of the second smoke outlet, and the fifth collecting tank and the sixth collecting tank together surround the second smoke outlet. The fifth collecting tank and the fifth collecting tank are located at the same circumferential position of the second smoke outlet, and the sixth collecting tank and the sixth collecting tank are located at the same circumferential position of the second smoke outlet; the fifth collecting tank has a fifth port, and the fifth collecting tank is connected to the fifth collecting tank through multiple fifth connecting pipes at different positions; the sixth collecting tank has a sixth port, and the sixth collecting tank is connected to the sixth collecting tank through multiple sixth connecting pipes at different positions.

[0015] Preferably, the heated pipe enclosure structure is formed with a first pipe section having the flue gas inlet, a second pipe section having the first flue gas outlet, and a third pipe section having the second flue gas outlet, the first pipe section, the second pipe section, and the third pipe section forming an intersection, and the second pipe section and the third pipe section are respectively located on opposite sides of the first pipe section;

[0016] The first water collecting tank and the first collecting tank are located on the same side of the third pipe section, and the second water collecting tank and the second collecting tank are located on the same side of the second pipe section; the third water collecting tank and the third collecting tank are located on the lower side close to the first pipe section, and the fourth water collecting tank and the fourth collecting tank are located on the upper side away from the first pipe section; the fifth water collecting tank and the fifth collecting tank are located on the upper side away from the first pipe section, and the sixth water collecting tank and the sixth collecting tank are located on the lower side close to the first pipe section.

[0017] Preferably, the side of the first pipe segment facing the second flue gas outlet and the lower side of the third pipe segment form the first heat exchange tube unit, the side of the first pipe segment facing the first flue gas outlet and the lower side of the second pipe segment form the second heat exchange tube unit, and the upper side of the second pipe segment and the upper side of the third pipe segment form the third heat exchange tube unit; the first heat exchange tube in the first heat exchange tube unit first extends along the axis of the first pipe segment, then bends, and then extends along the axis of the third pipe segment until it is connected to the sixth water collecting tank; the second heat exchange tube in the second heat exchange tube unit first extends along the axis of the first pipe segment, then bends, and then extends along the axis of the second pipe segment until it is connected to the third water collecting tank; the third heat exchange tube in the third heat exchange tube unit first extends along the axis of the second pipe segment, then bends, and then extends along the axis of the third pipe segment until it is connected to the fifth water collecting tank.

[0018] Preferably, a water-cooled sealing mechanism is connected to the second flue gas outlet, and the water-cooled sealing mechanism includes: a flange; a first pipe body and a second pipe body in an arc shape installed on the side of the flange away from the second flue gas outlet, the first pipe body and the second pipe body forming a circle around the axis of the flange, the first pipe body having an inlet, and the second pipe body having an outlet; a plurality of cooling pipes, the two ends of the cooling pipes being connected to the first pipe body and the second pipe body respectively, the cooling pipes being arranged in a serpentine manner in an area surrounded by the first pipe body and the second pipe body, and sealing plates being welded between adjacent cooling pipes, between the cooling pipes and the first pipe body, and between the cooling pipes and the second pipe body, so that the area surrounded by the first pipe body and the second pipe body is in a sealed state;

[0019] The first tube body, the second tube body and the flange are sealed together.

[0020] Preferably, the water-cooled sealing mechanism further includes: an annular tube arranged on the side of the cooling pipe away from the flange, the annular tube having a plurality of spray holes in the direction toward the cooling pipe, and the inlet of the annular tube is used to introduce gas to purge the cooling pipe.

[0021] Preferably, the water-cooled sealing mechanism also includes: a support mechanism extending toward the flange is connected to the side of the cooling pipe close to the flange, and a refractory material layer is coated on the side of the cooling pipe close to the flange, and the refractory material layer at least partially covers the support mechanism, and the support mechanism supports the refractory material layer in the direction of gravity.

[0022] Preferably, the inlet of the first tube body is used to be connected to a cooling water supply pipeline; the outlet of the second tube body is used to be connected to a cooling water discharge pipeline; and the inlet of the annular tube is used to be connected to a gas supply pipeline.

[0023] A converter system, comprising:

[0024] The vaporization flue structure, furnace mouth section pipeline, evaporative cooler, raw gas pipeline, settling cylinder, waste heat boiler, and flue gas purification system as described above;

[0025] The outlet of the furnace mouth section pipe is connected to the flue gas inlet of the vaporization flue structure, and the inlet of the furnace mouth section pipe is used to be connected to the converter furnace mouth; the inlet of the evaporative cooler is connected to one of the first flue gas outlet and the second flue gas outlet of the vaporization flue structure, and the outlet of the evaporative cooler is connected to the inlet of the flue gas purification system through the raw gas pipeline; the inlet of the settling drum can be connected to the other of the first flue gas outlet and the second flue gas outlet, and the outlet of the settling drum is connected to the inlet of the waste heat boiler, and the outlet of the waste heat boiler is connected to the inlet of the flue gas purification system through the raw gas pipeline.

[0026] Preferably, the converter system comprises:

[0027] Steam drum:

[0028] The outlet of the steam drum is connected to the inlet of the first merging manifold, the inlet of the second merging manifold, one of the fourth merging manifold and the fifth merging manifold through a first pipeline, and the inlet of the steam drum is connected to the outlet of the third merging manifold, the outlet of the sixth merging manifold, another of the fourth merging manifold and the fifth merging manifold through a second pipeline.

[0029] The technical solution of the present invention has the following significant beneficial effects:

[0030] The vaporization flue structure in the present application has a first flue gas outlet and a second flue gas outlet, so that the high temperature flowing into the flue gas inlet can be diverted. At the same time, one of the first flue gas outlet and the second flue gas outlet can be a spare flue gas outlet. When the diversion function is not needed, it can be closed. When there is a problem with the smoke outlet in use or its downstream pipeline or when it is upgraded and repaired, the smoke outlet in use can be closed, and the previously closed smoke outlet can be opened, and the two can be quickly switched to meet various different conditions that arise during use. In addition, the heated tube enclosure structure in the vaporization flue structure is connected by the first heat exchange tube unit, the second heat exchange tube unit and the third heat exchange tube unit. Each heat exchange tube unit has an independent corresponding water inlet manifold and water inlet manifold, water outlet manifold and water outlet manifold, thereby realizing three independent water flow channels, and the above structure can achieve efficient and simple production and processing.

[0031] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0033] Figure 1 This is a front view of the vaporization flue structure in an embodiment of the present invention;

[0034] Figure 2 A side view of the vaporization flue structure in an embodiment of the present invention;

[0035] Figure 3 A top view of the vaporization flue structure in an embodiment of the present invention;

[0036] Figure 4 for Figure 2 Cross-section at AA in the middle;

[0037] Figure 5 for Figure 1 Cross-section at the middle BB;

[0038] Figure 6 for Figure 1 Cross-section at the middle CC;

[0039] Figure 7 for Figure 4 The enlarged schematic diagram of point I in the middle;

[0040] Figure 8 This is a side view of the second smoke outlet in an embodiment of the present invention;

[0041] Figure 9 This is a front view of the second smoke outlet in an embodiment of the present invention;

[0042] Figure 10 for Figure 8 The enlarged schematic diagram of II in the middle;

[0043] Figure 11 for Figure 8 The enlarged schematic diagram of point III in the middle;

[0044] Figure 12 This is a schematic diagram of the flue gas system in the converter system;

[0045] Figure 13 This is a schematic diagram of the steam-water system in the converter system.

[0046] Reference numerals in the above drawings:

[0047] 1. Vaporization flue structure; 10. Heating pipe enclosure structure; 11. Flue gas inlet; 12. First flue gas outlet; 13. Second flue gas outlet; 14. First heat exchange tube unit; 15. Second heat exchange tube unit; 16. Third heat exchange tube unit; 17. First pipe section; 18. Second pipe section; 19. Third pipe section; 21. First water collecting tank; 22. Second water collecting tank; 23. Third water collecting tank; 24. Fourth water collecting tank; 25. Fifth water collecting tank; 26. Sixth water collecting tank; 27. Heat exchange tube; 28. Partition plate; 31. First collecting tank; 32. Second collecting tank; 33. Third collecting tank; 34. Fourth collecting tank; 35. Fifth collecting tank; 36. Sixth collecting tank Box; 4. Water-cooled sealing mechanism; 41. Flange; 42. First tube body; 43. Second tube body; 44. Cooling pipe; 45. Sealing plate; 46. Annular tube; 47. Support mechanism; 48. Refractory material layer; 5. First hanger; 6. Second hanger; 7. Inspection port; 8. Non-metallic compensator; 9. Support; 20. Furnace mouth section pipeline; 30. Evaporative cooler; 40. Raw gas pipeline; 50. Settling cylinder; 501. Flue; 60. Waste heat boiler; 70. Flue gas purification system; 80. Steam drum; 90. First pipeline; 901. Pressurizing device; 902. Decontamination device; 100. Gas supply pipeline; 200. Cooling water supply pipeline; 300. Cooling water discharge pipeline. DETAILED DESCRIPTION

[0048] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for illustrative purposes only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] In order to meet the needs of rapid conversion of high-temperature flue gas flow channels and to realize efficient and convenient production and processing of the heat exchange tube 27 unit in the heated tube enclosure structure 10, a vaporization flue structure 1 is proposed in this application. Figure 1 This is a front view of the vaporization flue structure in an embodiment of the present invention. Figure 2 This is a side view of the vaporization flue structure in an embodiment of the present invention. Figure 3 FIG. 1 is a top view of the vaporization flue structure in an embodiment of the present invention, as shown in FIG. Figures 1 to 3 As shown, the vaporization flue structure 1 may include: a heated pipe enclosure structure 10, a first water collecting tank 21, a second water collecting tank 22, a first collecting tank 31, a second collecting tank 32, a third water collecting tank 23, a fourth water collecting tank 24, a third collecting tank 33, a fourth collecting tank 34, a fifth water collecting tank 25, a sixth water collecting tank 26, a fifth collecting tank 35 and a sixth collecting tank 36.

[0051] like Figures 1 to 3 As shown, a flue gas flow channel is formed inside the heated tube enclosure structure 10. At the same time, the heated tube enclosure structure 10 forms a flue gas inlet 11, a first flue gas outlet 12, and a second flue gas outlet 13. The flue gas flow channels are connected to the flue gas inlet 11, the first flue gas outlet 12, and the second flue gas outlet 13, respectively. The flue gas inlet 11 is used to input the high-temperature flue gas from the converter. The flue gas flow channel formed by the heated tube enclosure structure 10 divides the high-temperature flue gas into two streams, one of which can flow to the first flue gas outlet 12 and the other to the second flue gas outlet 13. Of course, one of the first flue gas outlet 12 and the second flue gas outlet 13 can be closed. In this case, all the flue gas flows to one flue gas outlet. When needed, the closed flue gas outlet can be opened.

[0052] like Figures 1 to 3As shown, the heat-receiving tube enclosure structure 10 includes a first heat exchange tube unit 14, a second heat exchange tube unit 15 and a third heat exchange tube unit 16. The first heat exchange tube unit 14, the second heat exchange tube unit 15 and the third heat exchange tube unit 16 are sealed and connected together to form the side wall of the entire heat exchange tube enclosure structure 10. The first heat exchange tube unit 14, the second heat exchange tube unit 15 and the third heat exchange tube unit 16 can all exchange heat with the high-temperature flue gas flowing through the flue gas flow duct, thereby recycling the heat in the high-temperature flue gas and reducing the temperature of the high-temperature flue gas. The first heat exchange tube unit 14, the second heat exchange tube unit 15 and the third heat exchange tube unit 16 each have a plurality of heat exchange tubes 27, and the plurality of heat exchange tubes 27 are arranged and extended in parallel. At the same time, Figure 7 for Figure 4 The enlarged schematic diagram of point I is as follows: Figure 7 As shown, adjacent heat exchange tubes 27 are sealed and welded via spacer plates 28 to form sealed side walls of the heat exchange tube enclosure structure 10 .

[0053] like Figures 1 to 3 As shown, the first and second water headers 21 and 22 are located at the flue gas inlet 11. The first header 31 is connected to the first header 21, and the second header 32 is connected to the second header 22. The third and fourth headers 23 and 24 are located at the first flue gas outlet 12. The third header 33 is connected to the third header 23, and the fourth header 34 is connected to the fourth header 24. The second header 22 is connected to the third header 23 via the second heat exchange tube unit 15. Water input from the second header 32 is dispersed into the second header 22 and then flows into the multiple heat exchange tubes 27 in the second heat exchange tube unit 15, where it exchanges heat with the high-temperature flue gas flowing through the flue gas flow path. The heated water or water vapor is then collected in the third header 33 through the third header 23 before being discharged. If the heated water contains a mixture of steam and water, the third header 33 can serve as a water-steam distributor.

[0054] like Figures 1 to 3 As shown, the fifth and sixth water headers 25, 26 are disposed at the second flue gas outlet 13. The fifth collecting header 35 is connected to the fifth water header 25, and the sixth collecting header 36 is connected to the sixth water header 26. The fourth water header 24 is connected to the fifth water header 25 via the third heat exchange tube unit 16, and the sixth water header 26 is connected to the first water header 21 via the first heat exchange tube unit 14. The flow of water in the fourth water header 24, the third heat exchange tube unit 16, and the fifth water header 25, as well as in the sixth water header 26, the first heat exchange tube unit 14, and the first water header 21, are similar to those described above and will not be further elaborated here.

[0055] The vaporization flue structure 1 in the present application has a first flue gas outlet 12 and a second flue gas outlet 13, so that the high temperature flowing into the flue gas inlet 11 can be diverted. At the same time, one of the first flue gas outlet 12 and the second flue gas outlet 13 can be a spare flue gas outlet. When the diversion function is not needed, it can be closed. When there is a problem with the flue gas outlet in use or its downstream pipeline or when it is upgraded and repaired, the flue gas outlet in use can be closed, and the previously closed flue gas outlet can be opened, and the two can be quickly switched to meet various different conditions that arise during use. In addition, the heated tube enclosure structure 10 in the vaporization flue structure 1 is connected by the first heat exchange tube unit 14, the second heat exchange tube unit 15 and the third heat exchange tube unit 16. Each heat exchange tube 27 unit has an independent corresponding water inlet manifold and water inlet manifold, water outlet manifold and water outlet manifold, thereby realizing three independent water flow channels, and the above structure can achieve efficient and simple production and processing.

[0056] Figure 4 for Figure 2 The cross-section diagram at AA is as follows: Figures 1 to 4 As shown, as is feasible, the first collecting tank 21 and the second collecting tank 22 can respectively surround half of the circumference of the flue gas inlet 11, and the first collecting tank 21 and the second collecting tank 22 together surround the circumference of the flue gas inlet 11. The first collecting tank 31 and the first collecting tank 21 are at the same circumferential position of the flue gas inlet 11. Through the above structure, it is convenient for the first collecting tank 31 to be connected to the first collecting tank 21 through multiple first connecting pipes at different positions. The second collecting tank 32 and the second collecting tank 22 are at the same circumferential position of the flue gas inlet 11. Through the above structure, it is convenient for the second collecting tank 32 to be connected to the second collecting tank 22 through multiple second connecting pipes at different positions. The first collecting tank 31 has a first port, and the second collecting tank 32 has a second port for water input.

[0057] Similarly, Figure 5 for Figure 1 The cross-section diagram at the middle BB is as follows: Figures 1 to 3 、 Figure 5As shown, the third water collecting box 23 and the fourth water collecting box 24 respectively surround half of the first flue gas outlet 12, and the third water collecting box 23 and the fourth water collecting box 24 jointly surround the first flue gas outlet 12 for a circle. The third collecting box 33 and the third water collecting box 23 are at the same circumferential position of the first flue gas outlet 12, and the fourth collecting box 34 and the fourth water collecting box 24 are at the same circumferential position of the first flue gas outlet 12; the third collecting box 33 has a third port, and the third collecting box 33 is connected to the third water collecting box 23 at different positions through multiple third connecting pipes; the fourth collecting box 34 has a fourth port, and the fourth collecting box 34 is connected to the fourth water collecting box 24 at different positions through multiple fourth connecting pipes. Figure 6 for Figure 1 The cross-section diagram at CC is as follows: Figures 1 to 3 、 Figure 6 As shown, the fifth collecting tank 25 and the sixth collecting tank 26 respectively surround half of the second flue gas outlet 13, and the fifth collecting tank 25 and the sixth collecting tank 26 jointly surround the second flue gas outlet 13. The fifth collecting tank 35 and the fifth collecting tank 25 are located at the same circumferential position of the second flue gas outlet 13, and the sixth collecting tank 36 and the sixth collecting tank 26 are located at the same circumferential position of the second flue gas outlet 13; the fifth collecting tank 35 has a fifth port, and the fifth collecting tank 35 is connected to the fifth collecting tank 25 at different positions through multiple fifth connecting pipes; the sixth collecting tank 36 has a sixth port, and the sixth collecting tank 36 is connected to the sixth collecting tank 26 at different positions through multiple sixth connecting pipes.

[0058] Further, such as Figures 1 to 3 As shown, the heated pipe enclosure structure 10 is formed with a first pipe section 17 having a flue gas inlet 11, a second pipe section 18 having a first flue gas outlet 12, and a third pipe section 19 having a second flue gas outlet 13. The first pipe section 17 can extend generally in a vertical direction, the second pipe section 18 can extend generally in a horizontal direction, and the third pipe section 19 can extend generally in a horizontal direction. Of course, the first pipe section 17, the second pipe section 18, and the third pipe section 19 can also have a certain curvature.

[0059] Further, such as Figures 1 to 3As shown, the first pipe segment 17, the second pipe segment 18, and the third pipe segment 19 form an intersection, with the second pipe segment 18 and the third pipe segment 19 located on opposite sides of the first pipe segment 17. The first water header tank 21 and the first manifold tank 31 are located on the same side of the third pipe segment 19, while the second water header tank 22 and the second manifold tank 32 are located on the same side of the second pipe segment 18. The third water header tank 23 and the third manifold tank 33 are located on the lower side of the first pipe segment 17, while the fourth water header tank 24 and the fourth manifold tank 34 are located on the upper side away from the first pipe segment 17. The fifth water header tank 25 and the fifth manifold tank 35 are located on the upper side away from the first pipe segment 17, while the sixth water header tank 26 and the sixth manifold tank 36 are located on the lower side of the first pipe segment 17. Through the above structure, the layout of the six water collecting tanks and the six collecting manifolds can be made more reasonable, the entire vaporization flue structure 1 can be made more compact and simple, and it is also convenient to process each heat exchange tube 27 unit and the two water collecting tanks and two collecting manifolds corresponding to the heat exchange tube 27 unit.

[0060] In the above structure, if Figure 1 As shown, the side of the first tube segment 17 facing the second flue gas outlet 13 and the lower side of the third tube segment 19 form the first heat exchange tube unit 14. The side of the first tube segment 17 facing the first flue gas outlet 12 and the lower side of the second tube segment 18 form the second heat exchange tube unit 15. The upper side of the second tube segment 18 and the upper side of the third tube segment 19 form the third heat exchange tube unit 16. Through the above structural design, the first heat exchange tube 27 in the first heat exchange tube unit 14 first extends along the axis of the first tube segment 17, then bends, and then extends along the axis of the third tube segment 19 until it connects to the sixth water header tank 26. The second heat exchange tube 27 in the second heat exchange tube unit 15 first extends along the axis of the first tube segment 17, then bends, and then extends along the axis of the second tube segment 18 until it connects to the third water header tank 23. The third heat exchange tube 27 in the third heat exchange tube unit 16 first extends along the axis of the second tube segment 18, then bends, and then extends along the axis of the third tube segment 19 until it connects to the fifth water header tank 25. In this way, the heat exchange tubes 27 in each heat exchange tube 27 unit are easier to process and bend, and there will be no problem of bending being too complicated and too difficult. This can improve the overall processing efficiency of the heated tube enclosure structure 10, and each heat exchange tube 27 unit can be processed independently first, and then the three heat exchange tube 27 units can be connected together to form a complete heated tube enclosure structure 10.

[0061] As feasible, Figure 1 and Figure 2As shown, a support 9 can be connected to the outer wall of the first pipe section 17 to support the entire vaporization flue structure 1. A first hanger 5 for suspending the vaporization flue structure 1 can be connected to the relatively horizontally extending portion of the second pipe section 18. Similarly, a second hanger 6 for suspending the vaporization flue structure 1 can be connected to the relatively horizontally extending portion of the third pipe section 19. Through these various structures, the vaporization flue structure 1 can be suspended or supported. An inspection port 7 can be provided in the second pipe section 18 or the third pipe section 19 to facilitate maintenance.

[0062] In order to achieve the second smoke outlet 13 being in a closed state, Figure 8 This is a side view of the second smoke outlet in an embodiment of the present invention. Figure 9 FIG. 1 is a front view of the second smoke outlet in an embodiment of the present invention, as shown in FIG. Figures 8 and 9 As shown, a water-cooled sealing mechanism 4 can be connected to the second flue gas outlet 13. The water-cooled sealing mechanism 4 is used to seal the second flue gas outlet 13 and can also cool the water-cooled sealing mechanism 4 at the second flue gas outlet 13, thereby facilitating heat recovery. Alternatively, a flange 41 can be welded to the first heat exchange tube unit 14 and the third heat exchange tube unit 16 at the second flue gas outlet 13. The water-cooling sealing mechanism 4 may include: a flange 41; a first tube body 42 and a second tube body 43, each mounted on the side of the flange 41 facing away from the second flue gas outlet 13, each of the first tube body 42 and the second tube body 43 forming a circle around the axis of the flange 41; an inlet on the first tube body 42 and an outlet on the second tube body 43; a plurality of cooling tubes 44, each of the cooling tubes 44 communicating with the first tube body 42 and the second tube body 43 at both ends; the cooling tubes 44 being arranged in a serpentine manner within the area formed by the first tube body 42 and the second tube body 43; sealing plates 45 being welded between adjacent cooling tubes 44, between the cooling tubes 44 and the first tube body 42, and between the cooling tubes 44 and the second tube body 43, thereby sealing the area formed by the first tube body 42 and the second tube body 43; and a sealing connection between the first tube body 42, the second tube body 43, and the flange 41. The inlet of the first tube body 42 is used to connect to the cooling water supply pipeline 200 to supply cooling water to the first tube body 42. The outlet of the second tube body 43 is connected to the cooling water discharge pipeline 300 to discharge the cooling water after heat exchange. The inlet of the annular tube 46 is connected to the gas supply pipeline 100.

[0063] Specifically, the first tube body 42 and the second tube body 43 each roughly surround half of the axis of the flange 41, and the two do not intersect, thereby forming a circle. This makes it easier for the first tube body 42 and the second tube body 43 to be welded and sealed to the flange 41 on the side facing the flange 41. As a preferred embodiment, Figure 9As shown, the majority of the first tube 42 can be located on the left, and the majority of the second tube 43 can be located on the right. This way, after one end of the cooling tube 44 is connected to the first tube 42, it extends horizontally and reaches the second tube 43, then bends and repeatedly coils in a serpentine shape until it connects to the second tube 43. Then, another cooling tube 44 repeats the above structure. This way, the cooling tube 44 can coil back and forth in a serpentine shape within the area surrounded by the first and second tubes 42, 43, covering essentially the entire area without intersecting, while simultaneously ensuring that both ends are connected to the first and second tubes 42, 43. Then, Figure 11 for Figure 8 The enlarged schematic diagram of point III is as follows: Figure 9 and Figure 11 As shown, it is only necessary to weld sealing plates 45 between adjacent cooling tubes 44, between the cooling tube 44 and the first tube body 42, and between the cooling tube 44 and the second tube body 43, so that the area surrounded by the first tube body 42 and the second tube body 43 can be completely sealed.

[0064] like Figure 8 As shown, the flange 41 of the water-cooled blocking mechanism 4 is sealed and detachably connected to the flanges 41 welded to the first heat exchange tube unit 14 and the third heat exchange tube unit 16 by bolts, etc. When the second flue gas outlet 13 needs to be switched to an open state, the water-cooled blocking mechanism 4 can be removed.

[0065] like Figure 8 and Figure 9 As shown, the water-cooled sealing mechanism 4 may further include: an annular tube 46 provided on the side of the cooling pipe 44 away from the flange 41, the annular tube 46 having a plurality of spray holes formed in the direction toward the cooling pipe 44, and the inlet of the annular tube 46 being used to introduce gas to purge the cooling pipe 44. The inlet of the annular tube 46 is used to be connected to the gas supply pipeline 100. Preferably, the gas supply pipeline 100 can supply nitrogen gas which is safe and low in cost. When the water-cooled sealing mechanism 4 is connected to the converter system, the above structure can prevent the formation of a gas accumulation area, and the purging of the gas can destroy the static state of the accumulation area, and the flue gas in the gas accumulation area can be discharged from the normal flue gas outlet along with the gas.

[0066] Figure 10 for Figure 8 The enlarged schematic diagram of II is as follows: Figure 8 and Figure 10As shown, as a feasible method, the water-cooled sealing mechanism 4 also includes: a support mechanism 47 extending toward the flange 41 is connected to the side of the cooling pipe 44 close to the flange 41, and a refractory material layer 48 is coated on the side of the cooling pipe 44 close to the flange 41. The refractory material layer 48 at least partially covers the support mechanism 47, and the support mechanism 47 supports the refractory material layer 48 in the direction of gravity. The support mechanism 47 can have various shapes, and it only needs to support the refractory material layer 48 in the vertical direction. For example, the support mechanism 47 can be nail-shaped, or have a V-shaped cross section, etc. The support mechanism 47 can be welded to the cooling pipe 44 or the sealing plate 45 to ensure sufficient firmness. The refractory material layer 48 can prevent the cooling pipe 44 from directly contacting the high-temperature flue gas, reduce the possibility of damage to the cooling pipe 44 due to high temperature, and extend its service life.

[0067] In order to ensure the firmness and stability of the cooling pipe 44, Figure 9 As shown, multiple reinforcing ribs can be provided in the area surrounded by the first tube body 42 and the second tube body 43. The reinforcing ribs can extend horizontally and / or vertically, with their ends welded to the first tube body 42 and the second tube body 43. The horizontally extending reinforcing ribs intersect the vertically extending reinforcing ribs. The cooling tube 44 can be spot-welded to the reinforcing ribs to connect the two.

[0068] The vaporization flue structure 1 in this application can be specifically applied in the following converter systems: Figure 12 This is a schematic diagram of the flue gas system in the converter system, as shown in Figure 12As shown, the converter system includes: a vaporization flue structure 1, a furnace mouth section pipe 20, an evaporative cooler 30, a raw gas pipeline 40, a settling drum 50, a waste heat boiler 60, and a flue gas purification system 70. Among them, the outlet of the furnace mouth section pipe 20 can be connected to the flue gas inlet 11 of the vaporization flue structure 1. The inlet of the furnace mouth section pipe 20 is used to be connected to the converter furnace mouth. The inlet of the evaporative cooler 30 is connected to one of the first flue gas outlet 12 and the second flue gas outlet 13 of the vaporization flue structure 1. The evaporative cooler 30 is arranged in a vertical direction, and the inlet at its upper end can be connected to the first flue gas outlet 12 of the vaporization flue structure 1 through the first end section of the turn. The outlet of the evaporative cooler 30 is connected to the inlet of the flue gas purification system 70 through the raw gas pipeline 40. The inlet of the settling drum 50 can communicate with the other of the first and second flue gas outlets 12 and 13. The settling drum 50 is also arranged vertically, and its upper inlet can be connected to the second flue gas outlet 13 of the vaporization flue structure 1 via the second, diverted end section. The settling drum 50 is a fire capture device whose primary function is to capture large particles of converter dust in the flue gas. The outlet of the settling drum 50 can be connected to the inlet of the waste heat boiler 60 via the flue duct 501. The outlet of the waste heat boiler 60 is connected to the inlet of the flue gas purification system 70 via the raw gas pipeline 40.

[0069] like Figure 12 As shown, the flue gas outlet of the evaporation flue structure 1 of the converter system is configured with two flue gas cooling and gas purification process flows. In the first process flow, the converter flue gas flows through the following major equipment: evaporative cooler 30, raw gas pipeline 40, and flue gas purification system 70. In the second process flow, the converter flue gas flows through the following major equipment: settling drum 50, flue 501, waste heat boiler 60, and flue gas purification system 70.

[0070] In order to achieve rapid conversion between the first process and the second process, the vaporization flue structure 1 can be set at the converter vaporization flue 501. At the same time, a non-metallic compensator 8 can be set at the flue gas outlet of the corresponding vaporization flue structure 1 in the process under production status to compensate for or eliminate installation errors. A water-cooled blocking mechanism 4 can be set at the flue gas outlet of the corresponding vaporization flue structure 1 in the standby process under non-production status to block the flue gas. When the standby process under non-production status needs to be switched to production status, the water-cooled blocking mechanism 4 is removed to open the flue gas outlet. Through the above structure, when one of the waste heat recovery and primary dust removal processes fails and needs maintenance, it can be quickly switched to another process without affecting steelmaking production.

[0071] Figure 13 This is a schematic diagram of the steam-water system in the converter system. Figure 13As shown, the converter system may include a steam drum 80. The outlet of steam drum 80 is connected to the inlet of the first manifold 31, the inlet of the second manifold 32, and one of the fourth manifold 34 and the fifth manifold 35 via a first pipeline 90. The inlet of steam drum 80 is connected to the outlet of the third manifold 33, the outlet of the sixth manifold 36, and another of the fourth manifold 34 and the fifth manifold 35 via a second pipeline. A water filter 90 may be provided on the first pipeline 90, along with a pressure-boosting device 901, such as a circulating pump, for pressurizing the water. Valves may be provided at the points where the first pipeline 90 connects to the inlet of the first manifold 31, the inlet of the second manifold 32, and one of the fourth manifold 34 and the fifth manifold 35, to control their on / off operation. Multiple sets of the steam drum 802 and the pressure-boosting device 901 may be connected in parallel, allowing the other set to serve as a backup if one set malfunctions. At the same time, a valve can be installed between each set of devices and the steam drum 80 to achieve on-off control. The booster device 901 can achieve forced circulation between the steam drum 80 and each heat exchange tube 27 unit, thereby improving the life of the heated tube enclosure structure 10 in the vaporization flue structure 1.

[0072] The vaporizer flue structure 1 needs to cool the high-temperature flue gas flowing in from the flue gas inlet 11. The circulating water cooling method can be a high-pressure forced circulation cooling method, namely, pressurization by the booster device 901 on the first pipeline 90. The specific process can be as follows: The high-temperature water in the steam drum 80 is pressurized by the decontamination device 902 and the booster device 901, and then sent to the inlets of the first manifold 31, the second manifold 32, and one of the fourth manifold 34 and the fifth manifold 35 of the vaporizer flue structure 1 in three routes. The high-temperature water enters the three independent heat exchange tubes 27 in the heated tube enclosure structure 10 through the three inlets, thereby indirectly exchanging heat with the high-temperature flue gas. The resulting steam-water mixture then flows out of the vaporizer flue structure 1 through the outlets of the third manifold 33, the sixth manifold 36, and the other of the fourth manifold 34 and the fifth manifold 35, and is then returned to the steam drum 80, forming a complete closed-loop cooling system. At the same time, the cooling pipe 44 and the annular pipe 46 provided in the water-cooled plugging mechanism 4 ensure the effectiveness of the water-cooled plugging mechanism 4. Among them, a control valve can be provided on the gas supply pipeline 100 connected to the annular pipe 46 to achieve remote control of online periodic purging.

[0073] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0074] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vaporization flue structure, characterized in that: The vaporization flue structure includes: A heat receiving pipe enclosure structure, wherein the heat receiving pipe enclosure structure forms a flue gas inlet, a first flue gas outlet, and a second flue gas outlet, and the heat receiving pipe enclosure structure includes a first heat exchange pipe unit, a second heat exchange pipe unit, and a third heat exchange pipe unit; a first water collecting tank and a second water collecting tank provided at the flue gas inlet, a first collecting header connected to the first water collecting tank, and a second collecting header connected to the second water collecting tank; a third water collecting tank and a fourth water collecting tank provided at the first flue gas outlet, a third collecting header connected to the third water collecting tank, and a fourth collecting header connected to the fourth water collecting tank, wherein the second water collecting tank is connected to the third water collecting tank via the second heat exchange tube unit; a fifth water header and a sixth water header provided at the second flue gas outlet, a fifth collecting header connected to the fifth water header, and a sixth collecting header connected to the sixth water header, the fourth water header being connected to the fifth water header via the third heat exchange tube unit, and the sixth water header being connected to the first water header via the first heat exchange tube unit; The first collecting tank and the second collecting tank respectively surround half of the circumference of the flue gas inlet, and the first collecting tank and the second collecting tank together surround the circumference of the flue gas inlet. The first collecting tank and the first collecting tank are located at the same circumferential position of the flue gas inlet, and the second collecting tank and the second collecting tank are located at the same circumferential position of the flue gas inlet. The first collecting tank has a first port, and is connected to the first collecting tank via a plurality of first connecting pipes at different positions. The second collecting tank has a second port, and is connected to the second collecting tank via a plurality of second connecting pipes at different positions. The third water collecting tank and the fourth water collecting tank respectively surround half of the circumference of the first flue gas outlet, and the third water collecting tank and the fourth water collecting tank together surround the circumference of the first flue gas outlet. The third collecting tank and the third water collecting tank are located at the same circumferential position of the first flue gas outlet, and the fourth collecting tank and the fourth water collecting tank are located at the same circumferential position of the first flue gas outlet. The third collecting tank has a third port and is connected to the third water collecting tank at different positions through multiple third connecting pipes. The fourth collecting tank has a fourth port and is connected to the fourth water collecting tank at different positions through multiple fourth connecting pipes. The fifth and sixth water headers respectively surround half of the second flue gas outlet, and the fifth and sixth water headers together surround the second flue gas outlet for a full circumference. The fifth collecting header and the fifth water header are located at the same circumferential position of the second flue gas outlet, and the sixth collecting header and the sixth water header are located at the same circumferential position of the second flue gas outlet. The fifth collecting header has a fifth port, and is connected to the fifth water header at different positions via a plurality of fifth connecting pipes. The sixth collecting header has a sixth port, and is connected to the sixth water header at different positions via a plurality of sixth connecting pipes. The heated pipe enclosure structure is formed with a first pipe section having the smoke inlet, a second pipe section having the first smoke outlet, and a third pipe section having the second smoke outlet. The first pipe section, the second pipe section, and the third pipe section form an intersection. The second pipe section and the third pipe section are respectively located on opposite sides of the first pipe section. The first water collecting tank and the first collecting header are located on the same side of the third pipe section, and the second water collecting tank and the second collecting header are located on the same side of the second pipe section; the third water collecting tank and the third collecting header are located on the lower side close to the first pipe section, and the fourth water collecting tank and the fourth collecting header are located on the upper side away from the first pipe section; the fifth water collecting tank and the fifth collecting header are located on the upper side away from the first pipe section, and the sixth water collecting tank and the sixth collecting header are located on the lower side close to the first pipe section; The side of the first pipe segment facing the second flue gas outlet and the lower side of the third pipe segment form the first heat exchange tube unit, the side of the first pipe segment facing the first flue gas outlet and the lower side of the second pipe segment form the second heat exchange tube unit, and the upper side of the second pipe segment and the upper side of the third pipe segment form the third heat exchange tube unit; the first heat exchange tube in the first heat exchange tube unit first extends along the axis of the first pipe segment, then bends, and then extends along the axis of the third pipe segment until it is connected to the sixth water collecting tank; the second heat exchange tube in the second heat exchange tube unit first extends along the axis of the first pipe segment, then bends, and then extends along the axis of the second pipe segment until it is connected to the third water collecting tank; the third heat exchange tube in the third heat exchange tube unit first extends along the axis of the second pipe segment, then bends, and then extends along the axis of the third pipe segment until it is connected to the fifth water collecting tank; An inspection port is provided on the second pipe section or the third pipe section.

2. The vaporization flue structure according to claim 1, characterized in that: The second flue gas outlet is connected to a water-cooled sealing mechanism, the water-cooled sealing mechanism comprising: a flange; a first pipe body and a second pipe body in an arc shape installed on the side of the flange away from the second flue gas outlet, the first pipe body and the second pipe body forming a circle around the axis of the flange, the first pipe body having an inlet, and the second pipe body having an outlet; a plurality of cooling pipes, the two ends of the cooling pipes being connected to the first pipe body and the second pipe body respectively, the cooling pipes being arranged in a serpentine manner in an area surrounded by the first pipe body and the second pipe body, and sealing plates being welded between adjacent cooling pipes, between the cooling pipes and the first pipe body, and between the cooling pipes and the second pipe body, so that the area surrounded by the first pipe body and the second pipe body is in a sealed state; The first tube body, the second tube body and the flange are sealed together.

3. The vaporization flue structure according to claim 2, characterized in that: The water-cooled sealing mechanism also includes: an annular tube arranged on the side of the cooling pipe away from the flange, the annular tube has multiple spray holes in the direction toward the cooling pipe, and the inlet of the annular tube is used to introduce gas to purge the cooling pipe.

4. The vaporization flue structure according to claim 2, characterized in that: The water-cooled sealing mechanism also includes: a support mechanism extending toward the flange is connected to the side of the cooling pipe close to the flange, and a refractory material layer is coated on the side of the cooling pipe close to the flange. The refractory material layer at least partially covers the support mechanism, and the support mechanism supports the refractory material layer in the direction of gravity.

5. The vaporization flue structure according to claim 3, characterized in that: The inlet of the first tube body is used to be connected to a cooling water supply pipeline; the outlet of the second tube body is used to be connected to a cooling water discharge pipeline; and the inlet of the annular tube is used to be connected to a gas supply pipeline.

6. A converter system, characterized in that: The converter system comprises: The vaporization flue structure, furnace mouth section pipeline, evaporative cooler, raw gas pipeline, settling cylinder, waste heat boiler, and flue gas purification system according to any one of claims 1 to 5; The outlet of the furnace mouth section pipe is connected to the flue gas inlet of the vaporization flue structure, and the inlet of the furnace mouth section pipe is used to be connected to the converter furnace mouth; the inlet of the evaporative cooler is connected to one of the first flue gas outlet and the second flue gas outlet of the vaporization flue structure, and the outlet of the evaporative cooler is connected to the inlet of the flue gas purification system through the raw gas pipeline; the inlet of the settling drum can be connected to the other of the first flue gas outlet and the second flue gas outlet, and the outlet of the settling drum is connected to the inlet of the waste heat boiler, and the outlet of the waste heat boiler is connected to the inlet of the flue gas purification system through the raw gas pipeline.

7. The converter system according to claim 6, characterized in that: The converter system comprises: Steam drum: The outlet of the steam drum is connected to the inlet of the first merging manifold, the inlet of the second merging manifold, one of the fourth merging manifold and the fifth merging manifold through a first pipeline, and the inlet of the steam drum is connected to the outlet of the third merging manifold, the outlet of the sixth merging manifold, another of the fourth merging manifold and the fifth merging manifold through a second pipeline.

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