CN115289864A - Vaporization flue structure and converter system - Google Patents

Abstract

The invention discloses a vaporization flue structure and a converter system, which relate to the technical field of converters, and the vaporization flue structure comprises: the heating pipe surrounding structure forms a flue gas inlet, a first flue gas outlet and a second flue gas outlet, and comprises a first heat exchange pipe unit, a second heat exchange pipe unit and a third heat exchange pipe unit; the first water collecting tank and the second water collecting tank are arranged at the flue gas inlet, the first collecting header is communicated with the first water collecting tank, and the second collecting header is communicated with the second water collecting tank; the third water collecting tank and the fourth water collecting tank are arranged at the first smoke outlet, the third collecting header is communicated with the third water collecting tank, the fourth collecting header is communicated with the fourth water collecting tank, and the second water collecting tank is communicated with the third water collecting tank through a second heat exchange tube unit; and so on. The high-temperature flue gas flow channel quick switching device can meet the requirement for quick switching of a high-temperature flue gas flow channel, and can realize efficient and simple production and processing of the heat exchange tube unit in the heated tube enclosure structure.

Description

Vaporization flue structure and converter system

Technical Field

The invention relates to the technical field of converters, in particular to a vaporization flue structure and a converter system.

Background

The converter vaporization cooling flue is the only conveying facility of the high-temperature section of the converter flue gas and is also the main equipment of the converter high-temperature flue gas waste heat recovery system. At present, after flue gas generated by a converter passes through a converter vaporization flue, in order to purify and recover converter gas, a subsequent process can have various different process steps, for example, the process can include: OG dust removal process, LT dust removal process, full waste heat recovery process, dry dust removal process and the like.

The conventional structure of the evaporation flue of the converter commonly used at present is as follows: this flue structure includes: the device comprises 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 connecting flange and a flue gas outlet connecting flange. The heated tube enclosure structure is mainly formed by welding and enclosing a heated tube and a partition plate. The inlet and outlet of the smoke flowing in the high-temperature vaporization flue are single inlet and single outlet, and are respectively connected with other upstream and downstream facilities through the inlet and outlet flanges of the flue. Meanwhile, the high-temperature flue gas in the vaporization flue is cooled by circulating cooling water, and the circulating cooling water circulation way is as follows: the high-temperature flue gas enters a flue cooling water pipe from a water inlet through a collecting header, enters a heated pipe enclosure structure after water flow distribution is carried out through a lower header, exchanges heat with high-temperature flue gas, passes through an upper header and a steam-water distribution header after heat exchange, and finally flows out of a vaporization flue through a water outlet.

In the upgrading process of converter gas purification and recovery technical products in part of steel mills, in order to ensure that the initial stage or the running-in period of the upgrading process does not influence normal production activities, a new factory configuration structure is urgently needed, old processes can coexist, the old processes can be mutually standby and can be quickly converted, and the existing conventional structure cannot meet the requirements.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a vaporization flue structure and a converter system, which can meet the requirement of fast switching of a high-temperature flue gas flow channel, and can realize efficient, simple and convenient production and processing of a heat exchange tube unit in a heated tube enclosure structure.

The specific technical scheme of the embodiment of the invention is as follows:

a vaporization flue structure, comprising:

the heating pipe surrounding structure forms a flue gas inlet, a first flue gas outlet and a second flue gas outlet, and comprises a first heat exchange pipe unit, a second heat exchange pipe unit and a third heat exchange pipe unit;

the first water collecting tank and the second water collecting tank are arranged at the flue gas inlet, the first collecting header is communicated with the first water collecting tank, and the second collecting header is communicated with the second water collecting tank;

the third water collecting tank and the fourth water collecting tank are arranged at the first smoke outlet, the third collecting header is communicated with the third water collecting tank, the fourth collecting header is communicated with the fourth water collecting tank, and the second water collecting tank is communicated with the third water collecting tank through the second heat exchange tube unit;

the fourth water collecting tank is communicated with the fifth water collecting tank through the third heat exchange tube unit, and the sixth water collecting tank is communicated with the first water collecting tank through the first heat exchange tube unit.

Preferably, the first water collecting tank and the second water collecting tank surround half of the circumference of the flue gas inlet respectively, the first water collecting tank and the second water collecting tank surround the circumference of the flue gas inlet together, the first collecting tank and the first water collecting tank are located at the same circumferential position of the flue gas inlet, and the second collecting tank and the second water collecting tank are located at the same circumferential position of the flue gas inlet; the first collecting header is provided with a first port and communicated with the first water collecting header at different positions through a plurality of first communication pipes; the second collecting header is provided with a second port and is communicated with the second water collecting header at different positions through a plurality of second communicating pipes;

the third water collection tank and the fourth water collection tank respectively surround a half cycle of the first flue gas outlet, the third water collection tank and the fourth water collection tank jointly surround a cycle of the first flue gas outlet, the third collection header and the third water collection tank are located at the same circumferential position of the first flue gas outlet, and the fourth collection header and the fourth water collection tank are located at the same circumferential position of the first flue gas outlet; the third collecting header is provided with a third port and is communicated with the third water collecting header at different positions through a plurality of third communicating pipes; the fourth collecting header is provided with a fourth port and is communicated with the fourth water collecting header at different positions through a plurality of fourth communicating pipes;

the fifth water collection tank and the sixth water collection tank respectively surround half of the second flue gas outlet, the fifth water collection tank and the sixth water collection tank jointly surround one circle of the second flue gas outlet, the fifth collection header and the fifth water collection tank are located at the same circumferential position of the second flue gas outlet, and the sixth collection header and the sixth water collection tank are located at the same circumferential position of the second flue gas outlet; the fifth collecting header is provided with a fifth port and is communicated with the fifth water collecting header at different positions through a plurality of fifth communicating pipes; the sixth collecting header has a sixth port, and the sixth collecting header is communicated with the sixth header through a plurality of sixth communicating pipes at different positions.

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, where the first pipe section, the second pipe section, and the third pipe section form an intersection, and the second pipe section and the third pipe section are located on two opposite sides of the first pipe section, respectively;

the first water collecting tank and the first collecting header are positioned on one side of the third pipe section, and the second water collecting tank and the second collecting header are positioned on one side of the second pipe section; the third header tank and the third collection header tank are located near a lower side of the first tube section, and the fourth header tank and the fourth collection header tank are located at an upper side of the first tube section; the fifth header tank and the fifth collecting header are located at an upper side remote from the first tube section, and the sixth header tank and the sixth collecting header are located at a lower side close to the first tube section.

Preferably, a side of the first tube section facing the second flue gas outlet and a lower side of the third tube section form the first heat exchange tube unit, a side of the first tube section facing the first flue gas outlet and a lower side of the second tube section form the second heat exchange tube unit, and an upper side of the second tube section and an upper side of the third tube section form the third heat exchange tube unit; the first heat exchange tube in the first heat exchange tube unit extends along the axis of the first tube section, then is bent, and then extends along the axis of the third tube section until being connected to the third water collecting tank; the second heat exchange tube in the second heat exchange tube unit extends along the axis of the first tube section, then is bent and extends along the axis of the second tube section until being connected to the second water collecting tank; and the third heat exchange tube in the third heat exchange tube unit extends along the axis of the second tube section, then is bent and extends along the axis of the third tube section until being connected to the third water collecting tank.

Preferably, the second flue gas outlet is connected with a water-cooling plugging mechanism, and the water-cooling plugging mechanism comprises: a flange; the first pipe body and the second pipe body are arranged on one side, away from the second flue gas outlet, of the flange and are in arc shapes, the first pipe body and the second pipe body form a circle around the axis of the flange, the first pipe body is provided with an inlet, and the second pipe body is provided with an outlet; the two ends of each cooling pipe are respectively communicated with the first pipe body and the second pipe body, the cooling pipes are arranged in a region formed by the first pipe body and the second pipe body in a snakelike coiling mode, and sealing plates are welded between the 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 region formed by the first pipe body and the second pipe body in a sealing state;

the first pipe body, the second pipe body and the flange are connected in a sealing mode.

Preferably, the water-cooling plugging mechanism further comprises: the annular pipe is arranged on one side, away from the flange, of the cooling pipe, a plurality of spray holes are formed in the direction, facing the cooling pipe, of the annular pipe, and an inlet of the annular pipe is used for introducing gas to purge the cooling pipe.

Preferably, the water-cooling plugging mechanism further comprises: one side of the cooling pipe close to the flange is connected with a supporting mechanism extending towards the flange, one side of the cooling pipe close to the flange is coated with a refractory burning material layer, the refractory burning material layer at least partially covers the supporting mechanism, and the supporting mechanism supports the refractory burning material layer in the gravity direction.

Preferably, the inlet of the first pipe body is used for being connected with a cooling water supply pipeline; the outlet of the second pipe body is used for being connected with the cooling water discharge pipeline; the inlet of the annular pipe is used for being connected with a gas supply pipeline.

A converter system, the converter system comprising:

the vaporization flue structure, the fire door section pipeline, the evaporative cooler, the raw gas pipeline, the settling drum, the waste heat boiler, the flue gas purification system according to any one of claims 1 to 7;

the outlet of the furnace mouth section pipeline is connected with the flue gas inlet of the vaporization flue structure, and the inlet of the furnace mouth section pipeline is used for being connected with the furnace mouth of the converter; an inlet of the evaporative cooler is communicated with one of the first flue gas outlet and the second flue gas outlet of the vaporization flue structure, and an outlet of the evaporative cooler is communicated with an inlet of the flue gas purification system through the crude gas pipeline; the inlet of the settling cylinder can be communicated with the other of the first flue gas outlet and the second flue gas outlet, the outlet of the settling cylinder is communicated with the inlet of the waste heat boiler, and the outlet of the waste heat boiler is communicated with the inlet of the flue gas purification system through the crude gas pipeline.

Preferably, the converter system comprises:

a steam drum:

the outlet of the steam pocket is respectively connected with the inlet of the first collecting header, the inlet of the second collecting header, the fourth collecting header and one of the fifth collecting headers through first pipelines, and the inlet of the steam pocket is respectively connected with the outlet of the third collecting header, the outlet of the sixth collecting header, the fourth collecting header and the other of the fifth collecting headers through second pipelines.

The technical scheme of the invention has the following remarkable beneficial effects:

the vaporization flue structure in this application has first exhanst gas outlet and second exhanst gas outlet to can realize the reposition of redundant personnel function with the high temperature that the flue gas inlet flows in, simultaneously, one in first exhanst gas outlet and the second exhanst gas outlet can be reserve exhanst gas outlet. When the shunting function is not needed, the device can be closed. When the smoke outlet or the downstream pipeline of the smoke outlet in use goes wrong or is upgraded and maintained, the smoke outlet in use can be closed, the smoke outlet closed before is opened, and the smoke outlet are quickly switched, so that various different conditions in the use process are met. In addition, the heated tube enclosure structure in the vaporization flue structure is formed by connecting a first heat exchange tube unit, a second heat exchange tube unit and a third heat exchange tube unit, and each heat exchange tube unit is provided with an independent and corresponding water inlet collecting tank, a water inlet collecting header, a water outlet collecting tank and a water outlet collecting header, so that three independent water flow channels are realized, and the structure can realize efficient, simple and convenient production and processing.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.

FIG. 1 is a front view of a vaporization flue structure in an embodiment of the present invention;

FIG. 2 is a side view of a vaporization flue structure in an embodiment of the present invention;

FIG. 3 is a top view of a vaporization flue structure in an embodiment of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A in FIG. 2;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 6 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 7 is an enlarged schematic view taken at I in FIG. 4;

FIG. 8 is a side view of a second flue gas outlet in an embodiment of the present invention;

FIG. 9 is a front view of a second flue gas outlet in the embodiment of the invention;

FIG. 10 is an enlarged schematic view at II of FIG. 8;

FIG. 11 is an enlarged view of FIG. 8 at III;

FIG. 12 is a system diagram of flue gas in a converter system;

FIG. 13 is a system diagram of soda water in a converter system.

Reference numbers to the above figures:

1. a vaporization flue structure; 10. a heated tube containment structure; 11. a flue gas inlet; 12. a first flue gas outlet; 13. a second flue gas outlet; 14. a first heat exchange tube unit; 15. a second heat exchange pipe unit; 16. a third heat exchange tube unit; 17. a first tube section; 18. a second tube section; 19. a third tube section; 21. a first header tank; 22. a second header tank; 23. a third water collection tank; 24. a fourth water collection tank; 25. a fifth water collection tank; 26. a sixth header tank; 27. a heat exchange tube; 28. a partition plate; 31. a first collection header; 32. a second collection header; 33. a third collection header; 34. a fourth collecting header; 35. a fifth collecting header; 36. a sixth collecting header; 4. a water-cooling plugging mechanism; 41. a flange; 42. a first pipe body; 43. a second tube; 44. a cooling tube; 45. sealing plates; 46. an annular tube; 47. a support mechanism; 48. a refractory burning material layer; 5. a first hanger; 6. a second hanger; 7. an access hole; 8. a non-metallic compensator; 9. a support; 20. a furnace mouth section pipeline; 30. an evaporative cooler; 40. a raw gas pipeline; 50. a settling cylinder; 501. a flue; 60. a waste heat boiler; 70. a flue gas purification system; 80. a steam drum; 90. a first pipeline; 901. a pressure boosting device; 902. a decontamination device; 100. a gas supply line; 200. a cooling water supply line; 300. a cooling water discharge line.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and should not be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to meet the requirement for fast switching of a high-temperature flue gas flow channel and achieve efficient, simple and convenient production and processing of a heat exchange tube 27 unit in a heated tube enclosure structure 10, a vaporization flue structure 1 is provided in the present application, where fig. 1 is a front view of the vaporization flue structure in an embodiment of the present invention, fig. 2 is a side view of the vaporization flue structure in the embodiment of the present invention, and fig. 3 is a top view of the vaporization flue structure in the embodiment of the present invention, and as shown in fig. 1 to fig. 3, the vaporization flue structure 1 may include: the heat-receiving tube baffle structure 10, a first header tank 21, a second header tank 22, a first collecting header 31, a second collecting header 32, a third header tank 23, a fourth header tank 24, a third collecting header tank 33, a fourth collecting header tank 34, a fifth header tank 25, a sixth header tank 26, a fifth collecting header tank 35 and a sixth collecting header tank 36.

As shown in fig. 1 to 3, a flue gas flow channel is formed inside the heated tube enclosure structure 10, and meanwhile, 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, and the flue gas flow channel is respectively communicated with the flue gas inlet 11, the first flue gas outlet 12 and the second flue gas outlet 13. The flue gas inlet 11 is used for inputting high-temperature flue gas of the converter, and the high-temperature flue gas is divided into two parts by a flue gas flow passage formed by the heated pipe enclosure structure 10, wherein one part can flow to the first flue gas outlet 12, and the other part can flow to the second flue gas outlet 13. Of course, one of the first fume outlet 12 and the second fume outlet 13 may be in a closed state, and all the fume flows to one fume outlet, and the fume outlet in the closed state may be opened when necessary.

As shown in fig. 1 to 3, the heated 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 sealingly joined together to form a side wall of the entire heated tube enclosure 10. The first heat exchange tube unit 14, the second heat exchange tube unit 15 and the third heat exchange tube unit 16 can exchange heat with high-temperature flue gas flowing through a flue gas flow channel, so that heat in the high-temperature flue gas is recycled, and meanwhile, the temperature of the high-temperature flue gas is reduced. 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 therein, the plurality of heat exchange tubes 27 are arranged and extended in parallel, and fig. 7 is an enlarged schematic view of the point I in fig. 4, and as shown in fig. 7, adjacent heat exchange tubes 27 are hermetically welded by a partition plate 28, so as to form a side wall of the heated tube enclosure structure 10 in a sealed state.

As shown in fig. 1 to 3, the first water collecting tank 21 and the second water collecting tank 22 are disposed at the flue gas inlet 11, the first collecting header 31 is communicated with the first water collecting tank 21, and the second collecting header 32 is communicated with the second water collecting tank 22. The third water collecting tank 23 and the fourth water collecting tank 24 are arranged at the first smoke outlet 12, the third collecting header 33 is communicated with the third water collecting tank 23, and the fourth collecting header 34 is communicated with the fourth water collecting tank 24. The second header tank 22 communicates with the third header tank 23 through the second heat exchange tube unit 15. The water input from the second collecting header 32 disperses to the second header 22, then flows into the plurality of heat exchange tubes 27 in the second heat exchange tube unit 15 to exchange heat with the high temperature flue gas flowing through the flue gas flow channel, and the heated water or water vapor is collected to the third collecting header 33 through the third header 23 and then discharged. The third collection header 33 may function as a vapor-water distribution if the heated water includes a vapor-water mixture.

As shown in fig. 1 to 3, a fifth header tank 25 and a sixth header tank 26 are provided at the second flue gas outlet 13, a fifth collecting header 35 communicates with the fifth header tank 25, and a sixth collecting header 36 communicates with the sixth header tank 26. The fourth header tank 24 communicates with the fifth header tank 25 through the third heat exchange tube unit 16, and the sixth header tank 26 communicates with the first header tank 21 through the first heat exchange tube unit 14. The flow state of the water in the fourth header tank 24, the third heat exchange pipe unit 16 and the fifth header tank 25, and the flow state of the water in the sixth header tank 26, the first heat exchange pipe unit 14 and the first header tank 21 are similar to those described above, and thus, will not be described again.

Vaporization flue structure 1 in this application has first exhanst gas outlet 12 and second exhanst gas outlet 13 to can realize the reposition of redundant personnel function with the high temperature that 11 inlets for fume inlet flows in, simultaneously, one in first exhanst gas outlet 12 and the second exhanst gas outlet 13 can be reserve exhanst gas outlet. When the shunting function is not needed, the device can be closed. When the smoke outlet or the downstream pipeline of the smoke outlet in use goes wrong or is upgraded and maintained, the smoke outlet in use can be closed, the smoke outlet closed before is opened, and the smoke outlet are quickly switched, so that various different conditions in the use process are met. In addition, as for the heated tube enclosure structure 10 in the vaporization flue structure 1, which is formed by connecting 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 and corresponding water inlet header tank, an independent and corresponding water inlet collecting header tank, an independent water outlet header tank and an independent and corresponding water outlet collecting header tank, so that three independent water flow channels are realized, and the above structure can realize efficient, simple and convenient production and processing.

Fig. 4 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A in fig. 2. As shown in fig. 1 to 4, it is possible that the first header tank 21 and the second header tank 22 respectively surround half of the circumference of the flue gas inlet 11, and the first header tank 21 and the second header tank 22 together surround the circumference of the flue gas inlet 11. The first collecting header 31 and the first header tank 21 are at the same circumferential position of the flue gas inlet 11. With the above-described structure, it is convenient for the first collecting header 31 to communicate with the first header tank 21 at different positions through the plurality of first communication pipes. The second collecting header 32 and the second header 22 are at the same circumferential position of the flue gas inlet 11. With the above-described structure, it is convenient for the second collecting header 32 to communicate with the second water collecting header 22 at different positions through the plurality of second communication pipes. The first collecting header 31 has a first port and the second collecting header 32 has a second port for the input of water.

Similarly, fig. 5 is a cross-sectional view at B-B in fig. 1, as shown in fig. 1 to 3 and 5, the third water collecting tank 23 and the fourth water collecting tank 24 respectively surround half of the circumference of the first flue gas outlet 12, the third water collecting tank 23 and the fourth water collecting tank 24 together surround the circumference of the first flue gas outlet 12, the third collecting header 33 and the third water collecting tank 23 are located at the same circumferential position of the first flue gas outlet 12, and the fourth collecting header 34 and the fourth water collecting tank 24 are located at the same circumferential position of the first flue gas outlet 12; the third collecting header 33 has a third port, and the third collecting header 33 is communicated with the third header tank 23 at different positions through a plurality of third communication pipes; the fourth collecting header 34 has a fourth port, and the fourth collecting header 34 communicates with the fourth header tank 24 at different positions through a plurality of fourth communication pipes. Fig. 6 is a cross-sectional view at C-C in fig. 1, as shown in fig. 1 to 3 and 6, the fifth header tank 25 and the sixth header tank 26 respectively surround half of the circumference of the second flue gas outlet 13, the fifth header tank 25 and the sixth header tank 26 together surround the circumference of the second flue gas outlet 13, the fifth collecting header tank 35 and the fifth header tank 25 are located at the same circumferential position of the second flue gas outlet 13, and the sixth collecting header tank 36 and the sixth header tank 26 are located at the same circumferential position of the second flue gas outlet 13; the fifth collecting header 35 has a fifth port, and the fifth collecting header 35 communicates with the fifth header 25 at different positions through a plurality of fifth communicating pipes; the sixth collecting header 36 has a sixth port, and the sixth collecting header 36 communicates with the sixth header 26 at different positions through a plurality of sixth communication pipes.

Further, as shown in fig. 1 to 3, the heated tube enclosure 10 is formed with a first tube section 17 having a flue gas inlet 11, a second tube section 18 having a first flue gas outlet 12, and a third tube section 19 having a second flue gas outlet 13. The first pipe section 17 may extend in a substantially vertical direction, the second pipe section 18 may extend in a substantially horizontal direction, and the third pipe section 19 may extend in a substantially horizontal direction, although the first pipe section 17, the second pipe section 18, and the third pipe section 19 may have a certain curvature.

Further, as shown in fig. 1 to 3, the first pipe section 17, the second pipe section 18 and the third pipe section 19 form a junction, and the second pipe section 18 and the third pipe section 19 are respectively located at two opposite sides of the first pipe section 17. The first collecting tank 21 and the first collecting header 31 are located on the third tube section 19 side, and the second collecting tank 22 and the second collecting header 32 are located on the second tube section 18 side. The third header tank 23 and the third collecting header 33 are located close to the lower side of the first tube section 17 and the fourth header tank 24 and the fourth collecting header 34 are located far away from the upper side of the first tube section 17. The fifth collection tank 25 and the fifth collection header 35 are located at the upper side remote from the first tube section 17, and the sixth collection tank 26 and the sixth collection header 36 are located at the lower side close to the first tube section 17. By the structure, the layout of the six water collecting tanks and the six collecting headers is more reasonable, the whole vaporization flue structure 1 is more compact and simple, and meanwhile, the heat exchange tube 27 units, and the two water collecting tanks and the two collecting headers which are correspondingly connected with the heat exchange tube 27 units are convenient to process.

In the above-described structure, as shown in FIG. 1, the side of the first tube section 17 facing the second flue gas outlet 13 and the lower side of the third tube section 19 form the first heat exchange tube unit 14, the side of the first tube section 17 facing the first flue gas outlet 12 and the lower side of the second tube section 18 form the second heat exchange tube unit 15, and the upper side of the second tube section 18 and the upper side of the third tube section 19 form the third heat exchange tube unit 16. With the above structural design, it is possible to make the first heat exchange tube 27 in the first heat exchange tube unit 14 extend along the axis of the first tube section 17 and then bend and then extend along the axis of the third tube section 19 until being connected to the third header tank 23, the second heat exchange tube 27 in the second heat exchange tube unit 15 extend along the axis of the first tube section 17 and then bend and then extend along the axis of the second tube section 18 until being connected to the second header tank 22, and the third heat exchange tube 27 in the third heat exchange tube unit 16 extend along the axis of the second tube section 18 and then bend and then extend along the axis of the third tube section 19 until being connected to the third header tank 23. Therefore, the heat exchange tubes 27 in the heat exchange tube 27 units are more convenient to process and bend, the problems of too complex bending and too high difficulty are solved, the processing efficiency of the whole heated tube enclosure structure 10 is improved, and each heat exchange tube 27 unit can be independently processed and then the three heat exchange tube 27 units are connected together to form the complete heated tube enclosure structure 10.

As a matter of course, as shown in fig. 1 and 2, a support 9 can be connected to the outer side wall of the first pipe section 17 for supporting the entire vaporization flue structure 1. A first hanger 5 for hanging the vaporizing flue structure 1 can be connected to the portion of the second pipe section 18 extending relatively more horizontally, and likewise, a second hanger 6 for hanging the vaporizing flue structure 1 can be connected to the portion of the third pipe section 19 extending relatively more horizontally. Through the various structures, the purpose of hoisting or supporting the vaporization flue structure 1 is achieved. The second pipe section 18 or the third pipe section can be provided with an access opening 7 so as to be convenient for maintenance.

In order to enable the second flue gas outlet 13 to be in a closed state, fig. 8 is a side view of the second flue gas outlet in the embodiment of the present invention, and fig. 9 is a front view of the second flue gas outlet in the embodiment of the present invention, as shown in fig. 8 to fig. 9, the second flue gas outlet 13 may be connected with a water-cooling blocking mechanism 4, and the water-cooling blocking mechanism 4 is used to close the second flue gas outlet 13, and can implement cooling of the water-cooling blocking mechanism 4 at the second flue gas outlet 13, and also facilitate recycling of heat. As a possibility, a flange 41 is welded on the first heat exchange tube unit 14 and the third heat exchange tube unit 16 at the second flue gas outlet 13. The water-cooled plugging mechanism 4 may include: a flange 41; a first arc-shaped pipe body 42 and a second arc-shaped pipe body 43 which are arranged on one side of the flange 41, which is far away from the second flue gas outlet 13, wherein the first arc-shaped pipe body 42 and the second arc-shaped pipe body 43 form a circle around the axis of the flange 41, the first arc-shaped pipe body 42 is provided with an inlet, and the second arc-shaped pipe body 43 is provided with an outlet; the cooling pipes 44 are respectively communicated with the first pipe body 42 and the second pipe body 43 at two ends of each cooling pipe 44, the cooling pipes 44 are arranged in the area formed by the first pipe body 42 and the second pipe body 43 in a coiled mode, and sealing plates 45 are welded among the adjacent cooling pipes 44, between the cooling pipes 44 and the first pipe body 42 and between the cooling pipes 44 and the second pipe body 43, so that the area formed by the first pipe body 42 and the second pipe body 43 is in a sealed state; the first tube 42, the second tube 43 and the flange 41 are connected in a sealing manner. The inlet of the first pipe 42 is adapted to be connected to a cooling water supply line 200 to supply cooling water into the first pipe 42. The outlet of the second pipe 43 is connected to the cooling water discharge pipe 300 to discharge the cooling water heated by the heat exchange. The inlet of the annular tube 46 is adapted to be connected to a gas supply line 100.

In particular, the first 42 and second 43 tubular bodies each make substantially a half-turn around the axis of the flange 41, without the intersection of the two, thus forming a turn. This facilitates the welding seal of the first and second tubular bodies 42, 43 to the flange 41 on the side facing the flange 41. Preferably, as shown in fig. 9, most of the first tube 42 may be located at the left side, and most of the second tube 43 may be located at the right side, so that one end of the cooling pipe 44 is connected to the first tube 42, and then bent after extending in the horizontal direction and reaching the second tube 43 to be repeatedly wound in a serpentine shape until the second tube 43 is connected. Thereafter, the above structure is repeated by the further cooling pipe 44, so that the cooling pipe 44 can be wound in a serpentine shape to and fro over substantially the entire area in the area surrounded by the first pipe body 42 and the second pipe body 43 without crossing each other, while achieving communication between both ends of the cooling pipe 44 and the first pipe body 42 and the second pipe body 43, respectively. Next, fig. 11 is an enlarged view of the part III in fig. 8, and as shown in fig. 9 and fig. 11, only the sealing plates 45 need to be welded between the adjacent cooling pipes 44, between the cooling pipe 44 and the first pipe body 42, and between the cooling pipe 44 and the second pipe body 43, so that the area formed by the first pipe body 42 and the second pipe body 43 can be completely sealed.

As shown in fig. 8, the flange 41 of the water-cooling plugging mechanism 4 and the flanges 41 welded to the first heat exchange tube unit 14 and the third heat exchange tube unit 16 are connected in a sealing and detachable manner by bolts or the like. When the second flue gas outlet 13 needs to be switched to the open state, the water-cooling plugging mechanism 4 can be detached.

As shown in fig. 8 and 9, the water-cooling plugging mechanism 4 may further include: and the annular pipe 46 is arranged on one side of the cooling pipe 44, which is far away from the flange 41, a plurality of spray holes are formed in the direction of the annular pipe 46 towards the cooling pipe 44, and an inlet of the annular pipe 46 is used for introducing gas to purge the cooling pipe 44. The inlet of the annular tube 46 is adapted to be connected to a gas supply line 100. Preferably, the gas supply line 100 can supply nitrogen gas at a safe and low cost. When the water-cooling plugging mechanism 4 is connected in a converter system, the gas accumulation area can be prevented from being generated through the structure, the static state of the accumulation area can be damaged through gas purging, and the flue gas in the gas accumulation area can be discharged from a normal flue gas outlet along with the gas.

Fig. 10 is an enlarged schematic view at II in fig. 8, and as shown in fig. 8 and 10, the water-cooled plugging mechanism 4 further includes: a supporting mechanism 47 extending towards the flange 41 is connected to one side of the cooling pipe 44 close to the flange 41, a refractory burning material layer 48 is coated on one side of the cooling pipe 44 close to the flange 41, the refractory burning material layer 48 at least partially covers the supporting mechanism 47, and the supporting mechanism 47 supports the refractory burning material layer 48 in the gravity direction. The supporting mechanism 47 can have various shapes, and it only needs to be able to support the refractory material layer 48 in the vertical direction, for example, the supporting mechanism 47 can be in a nail shape, a V-shape in cross section, or the like. The support mechanism 47 may be welded to the cooling pipe 44 or the seal plate 45 to ensure a sufficient degree of firmness. The refractory material layer 48 can prevent the cooling pipe 44 from directly contacting with the high-temperature flue gas, thereby reducing the possibility of damage to the cooling pipe 44 due to high temperature and prolonging the service life of the cooling pipe.

In order to ensure the firmness and stability of the cooling tube 44, as shown in fig. 9, a plurality of reinforcing ribs may be disposed in the area surrounded by the first tube 42 and the second tube 43, and the reinforcing ribs may extend in the horizontal direction and/or the vertical direction, and both ends of the reinforcing ribs are welded to the first tube 42 and the second tube 43, respectively. The ribs extending in the horizontal direction intersect the ribs extending in the vertical direction. The cooling tubes 44 may be spot welded to the bead portions to join the two together.

The vaporization flue structure 1 of the present application can be specifically applied to the following converter system, and fig. 12 is a schematic diagram of a flue gas system in the converter system, as shown in fig. 12, the converter system includes: the system comprises a vaporization flue structure 1, a furnace mouth section pipeline 20, an evaporative cooler 30, a raw gas pipeline 40, a settling cylinder 50, a waste heat boiler 60 and a flue gas purification system 70. Wherein, the outlet of the furnace mouth section pipe 20 can be connected with the flue gas inlet 11 of the vaporization flue structure 1. The inlet of the furnace mouth section pipeline 20 is used for connecting with the furnace mouth of the converter. 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 evaporative flue structure 1, the evaporative cooler 30 is arranged in the vertical direction, and the inlet of the upper end thereof can be connected to the first flue gas outlet 12 of the evaporative flue structure 1 via a first end section that is turned around. The outlet of the evaporative cooler 30 is in communication with the inlet of the flue gas cleaning system 70 via a raw gas conduit 40. The inlet of the settling cylinder 50 can be communicated with the other of the first flue gas outlet 12 and the second flue gas outlet 13, the settling cylinder 50 is also arranged in the vertical direction, and the inlet of the upper end thereof can be connected with the second flue gas outlet 13 of the vaporization flue structure 1 through the second end section of the direction change. The settling cylinder 50 is a kindling device, and the main function of the settling cylinder is to trap large-particle converter dust in flue gas. The outlet of the settling drum 50 can be communicated with the inlet of the waste heat boiler 60 through a flue 501, and the outlet of the waste heat boiler 60 is communicated with the inlet of the flue gas purification system 70 through a raw gas pipeline 40.

As shown in fig. 12, the flue gas outlet of the vaporization flue structure 1 of the converter system is configured with two flue gas cooling and gas purification processes: in the first process, the main devices which are sequentially passed by the converter flue gas flow direction are respectively as follows: an evaporative cooler 30, a raw gas pipeline 40 and a flue gas purification system 70. In the second flow, the main devices which are sequentially passed by the converter flue gas flow direction are respectively as follows: a settling cylinder 50, a flue 501, a waste heat boiler 60 and a flue gas purification system 70.

In order to realize the rapid switching between the first process and the second process, the vaporization flue structure 1 can be arranged at the vaporization flue 501 of the converter, meanwhile, the smoke outlet of the corresponding vaporization flue structure 1 in the process flow under the production state can be provided with a non-metal compensator 8 so as to compensate or remove the installation error, and the smoke outlet of the corresponding vaporization flue structure 1 in the standby process flow under the non-production state can be provided with a water-cooling plugging mechanism 4 for plugging the smoke. When the standby process flow needs to be switched into the production state under the non-production state, the water-cooling plugging mechanism 4 is moved out to open the flue gas outlet. Through above-mentioned structure, when the flow of one of them waste heat recovery and once removing dust breaks down and need overhaul, can fast switch over to on another flow to do not influence the production of steelmaking.

Fig. 13 is a schematic diagram of a system for soda water in a converter system, and as shown in fig. 13, the converter system may include: the steam drum 80: the outlet of the steam drum 80 is connected by a first line 90 to one of the inlet of the first collecting header 31, the inlet of the second collecting header 32, the fourth collecting header 34 and the fifth collecting header 35, respectively, and the inlet of the steam drum 80 is connected by a second line to the outlet of the third collecting header 33, the outlet of the sixth collecting header 36, the fourth collecting header 34 and the other of the fifth collecting header 35, respectively. A decontamination device 902 for filtering the water and a pressurization device 901 such as a circulation pump for pressurizing the water may be provided on the first line 90. The first line 90 may be provided with a valve corresponding to one of the inlet of the first collecting header 31, the inlet of the second collecting header 32, the fourth collecting header 34, and the fifth collecting header 35, respectively, to control on/off. The decontamination device 902 and the pressurization device 901 can be provided with a plurality of groups, and the plurality of groups are connected in parallel, so that when one group of devices is abnormal, the other group can play a standby role. Meanwhile, a valve can be arranged between each group of devices and the steam drum 80 to realize on-off control. Forced circulation between the steam drum 80 and each heat exchange pipe 27 unit can be realized through the supercharging device 901, so that the service life of the heated pipe enclosure structure 10 in the vaporization flue structure 1 can be prolonged.

The vaporization flue structure 1 needs to cool the high-temperature flue gas flowing from the flue gas inlet 11, and the circulating water cooling manner may be a high-pressure forced circulation cooling manner, that is, pressurization is performed by the pressurization 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 pressurization device 901, and then is sent to the inlet of one of the first collecting header 31, the second collecting header 32, the fourth collecting header 34 and the fifth collecting header 35 of the vaporization flue structure 1 in three ways. High-temperature water enters the three independent heat exchange tube 27 units in the heated tube enclosure structure 10 through the three inlets respectively, so that after indirect heat exchange is carried out on the high-temperature flue gas, a generated steam-water mixture flows out of the vaporization flue structure 1 through the third collecting header 33, the sixth collecting header 36, the fourth collecting header 34 and the fifth collecting header 35 of the vaporization flue structure 1, and then returns to the steam pocket 80, thereby forming a complete circulation cooling closed circulation system. Meanwhile, the cooling pipe 44 and the annular pipe 46 arranged on the water-cooling plugging mechanism 4 ensure the use effect of the water-cooling plugging mechanism 4. Wherein, the gas supply line 100 connected with the annular pipe 46 can be provided with a control valve, so as to realize remote control of online periodic purging.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of 8230to describe a combination shall include the identified element, ingredient, component or step and other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims (10)

1. A vaporization flue structure, comprising:

the heating pipe surrounding structure forms a flue gas inlet, a first flue gas outlet and a second flue gas outlet, and comprises a first heat exchange pipe unit, a second heat exchange pipe unit and a third heat exchange pipe unit;

the first water collecting tank and the second water collecting tank are arranged at the smoke inlet, the first collecting header is communicated with the first water collecting tank, and the second collecting header is communicated with the second water collecting tank;

the third water collecting tank and the fourth water collecting tank are arranged at the first smoke outlet, the third collecting header is communicated with the third water collecting tank, the fourth collecting header is communicated with the fourth water collecting tank, and the second water collecting tank is communicated with the third water collecting tank through the second heat exchange tube unit;

the fourth water collecting tank is communicated with the fifth water collecting tank through the third heat exchange tube unit, and the sixth water collecting tank is communicated with the first water collecting tank through the first heat exchange tube unit.

2. The vaporization flue structure of claim 1, wherein the first header tank and the second header tank each encircle a half of the flue gas inlet, the first header tank and the second header tank collectively encircle a full circumference of the flue gas inlet, the first collection header tank and the first header tank are at a same circumferential position of the flue gas inlet, and the second collection header tank and the second header tank are at a same circumferential position of the flue gas inlet; the first collecting header is provided with a first port and communicated with the first water collecting header at different positions through a plurality of first communication pipes; the second collecting header is provided with a second port and is communicated with the second water collecting header at different positions through a plurality of second communicating pipes;

the third water collection tank and the fourth water collection tank respectively surround a half cycle of the first flue gas outlet, the third water collection tank and the fourth water collection tank jointly surround a cycle of the first flue gas outlet, the third collection header and the third water collection tank are located at the same circumferential position of the first flue gas outlet, and the fourth collection header and the fourth water collection tank are located at the same circumferential position of the first flue gas outlet; the third collecting header is provided with a third port and is communicated with the third water collecting header at different positions through a plurality of third communicating pipes; the fourth collecting header is provided with a fourth port and is communicated with the fourth water collecting header at different positions through a plurality of fourth communicating pipes;

the fifth water collection tank and the sixth water collection tank respectively surround half of the second flue gas outlet, the fifth water collection tank and the sixth water collection tank jointly surround one circle of the second flue gas outlet, the fifth collection header and the fifth water collection tank are located at the same circumferential position of the second flue gas outlet, and the sixth collection header and the sixth water collection tank are located at the same circumferential position of the second flue gas outlet; the fifth collecting header is provided with a fifth port and is communicated with the fifth water collecting header at different positions through a plurality of fifth communicating pipes; the sixth collecting header has a sixth port, and the sixth collecting header is communicated with the sixth header at different positions by a plurality of sixth communication pipes.

3. The vaporization flue structure of claim 2, wherein the heated tube enclosure is formed with a first tube section having the flue gas inlet, a second tube section having the first flue gas outlet, and a third tube section having the second flue gas outlet, the first tube section, the second tube section, and the third tube section forming a junction, the second tube section and the third tube section being located on opposite sides of the first tube section;

the first water collecting tank and the first collecting header are positioned on one side of the third pipe section, and the second water collecting tank and the second collecting header are positioned on one side of the second pipe section; the third header tank and the third collection header tank are located near a lower side of the first tube section, and the fourth header tank and the fourth collection header tank are located at an upper side of the first tube section; the fifth header tank and the fifth collection header are located on an upper side away from the first tube section, and the sixth header tank and the sixth collection header are located on a lower side adjacent to the first tube section.

4. The vaporizing flue structure of claim 3, wherein a side of the first tube section facing the second flue gas outlet and a lower side of the third tube section form the first heat exchange tube unit, a side of the first tube section facing the first flue gas outlet and a lower side of the second tube section form the second heat exchange tube unit, and an upper side of the second tube section and an upper side of the third tube section form the third heat exchange tube unit; the first heat exchange tube in the first heat exchange tube unit extends along the axis of the first tube section, then is bent, and then extends along the axis of the third tube section until being connected to the third water collecting tank; the second heat exchange tube in the second heat exchange tube unit extends along the axis of the first tube section, then is bent and extends along the axis of the second tube section until being connected to the second water collecting tank; and the third heat exchange tube in the third heat exchange tube unit extends along the axis of the second tube section, then is bent and extends along the axis of the third tube section until being connected to the third water collecting tank.

5. The vaporization flue structure according to claim 4, wherein a water-cooling blocking mechanism is connected to the second flue gas outlet, and the water-cooling blocking mechanism comprises: a flange; the first pipe body and the second pipe body are arranged on one side, away from the second flue gas outlet, of the flange and are in arc shapes, the first pipe body and the second pipe body form a circle around the axis of the flange, the first pipe body is provided with an inlet, and the second pipe body is provided with an outlet; the two ends of each cooling pipe are respectively communicated with the first pipe body and the second pipe body, the cooling pipes are arranged in a region formed by the first pipe body and the second pipe body in a snakelike coiling mode, and sealing plates are welded between the 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 region formed by the first pipe body and the second pipe body in a sealing state;

the first pipe body, the second pipe body and the flange are connected in a sealing mode.

6. The vaporization flue structure of claim 5, wherein the water-cooled plugging mechanism further comprises: the annular pipe is arranged on one side, away from the flange, of the cooling pipe, the annular pipe faces the direction of the cooling pipe, a plurality of spray holes are formed in the direction of the annular pipe, and an inlet of the annular pipe is used for introducing gas to blow the cooling pipe.

7. The vaporization flue structure of claim 5, wherein the water-cooled plugging mechanism further comprises: one side of the cooling pipe, which is close to the flange, is connected with a supporting mechanism extending towards the flange, one side of the cooling pipe, which is close to the flange, is coated with a refractory burning material layer, the supporting mechanism is at least partially coated with the refractory burning material layer, and the supporting mechanism supports the refractory burning material layer in the gravity direction.

8. The vaporizing flue structure according to claim 6, wherein the inlet of the first pipe is adapted to be connected to a cooling water supply line; the outlet of the second pipe body is used for being connected with the cooling water discharge pipeline; the inlet of the annular pipe is used for being connected with a gas supply pipeline.

9. A converter system, characterized in that the converter system comprises:

the vaporization flue structure, the fire door section pipeline, the evaporative cooler, the raw gas pipeline, the sedimentation cylinder, the waste heat boiler and the flue gas purification system according to any one of claims 1 to 7;

the outlet of the furnace mouth section pipeline is connected with the flue gas inlet of the vaporization flue structure, and the inlet of the furnace mouth section pipeline is used for being connected with the furnace mouth of the converter; the inlet of the evaporative cooler is communicated with 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 communicated with the inlet of the flue gas purification system through the crude gas pipeline; the inlet of the settling cylinder can be communicated with the other of the first flue gas outlet and the second flue gas outlet, the outlet of the settling cylinder is communicated with the inlet of the waste heat boiler, and the outlet of the waste heat boiler is communicated with the inlet of the flue gas purification system through the crude gas pipeline.

10. The converter system of claim 9, comprising:

a steam drum:

the outlet of the steam pocket is respectively connected with the inlet of the first collecting header, the inlet of the second collecting header, the fourth collecting header and one of the fifth collecting headers through first pipelines, and the inlet of the steam pocket is respectively connected with the outlet of the third collecting header, the outlet of the sixth collecting header, the fourth collecting header and the other of the fifth collecting headers through second pipelines.

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