CN214148864U - Vaporization cooling flue in converter waste heat boiler - Google Patents
Vaporization cooling flue in converter waste heat boiler Download PDFInfo
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- CN214148864U CN214148864U CN202022915739.9U CN202022915739U CN214148864U CN 214148864 U CN214148864 U CN 214148864U CN 202022915739 U CN202022915739 U CN 202022915739U CN 214148864 U CN214148864 U CN 214148864U
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Abstract
The utility model discloses a vaporization cooling flue in converter waste heat boiler, include: the furnace mouth section flue, the middle I section flue, the middle II section flue, the middle III section flue and the tail flue are sequentially communicated from bottom to top; all include in each section flue: annular import collection case and annular outlet collection case that the interval set up are equipped with the water-cooled wall between annular import collection case and the annular outlet collection case, and this water-cooled wall includes: the two ends of each first heated pipe are respectively communicated with the corresponding annular inlet header and the corresponding annular outlet header; the furnace mouth section flue and the middle I section flue are hermetically connected through an expansion compensator; spoilers are arranged in each first heated pipe within a 120-degree included angle range formed by symmetrically expanding bottom center buses of the obliquely arranged middle I-section flue and the obliquely arranged middle II-section flue at the lower section part towards two sides. The evaporation cooling flue is safe and stable in operation and long in service life.
Description
Technical Field
The utility model relates to a converter exhaust-heat boiler field, concretely relates to vaporization cooling flue in converter exhaust-heat boiler.
Background
The converter waste heat boiler is a flue type waste heat boiler, and is widely applied to recovering heat in high-temperature converter flue gas of 1650 ℃ generated during converter steelmaking in a steel mill. The converter waste heat boiler is directly linked in the production process of converter steelmaking and directly participates in production as part of the steelmaking process of a steel mill. The converter waste heat boiler comprises: movable smoke hood, steam pocket, vaporization cooling flue. The evaporative cooling flue includes: the furnace mouth section flue, the middle I section flue, the middle II section flue, the middle III section flue and the tail flue are sequentially communicated. Furnace mouth section flue, in I section flue, in II section flues, in III section flues, all include in the afterbody flue: annular import collection case and annular outlet collection case that the interval set up are provided with the water-cooling wall between annular import collection case and the annular outlet collection case, and this water-cooling wall includes: the two ends of each first heated pipe are respectively communicated with the corresponding annular inlet header and the corresponding annular outlet header.
At present, each section of flue in the evaporative cooling flue is usually connected in a sealing way through connecting flanges and sealing gaskets arranged at the upper end and the lower end. Because the temperature of the high-temperature converter flue gas passing through the vaporization cooling flue is higher, when the converter makes steel, each section of flue is heated to expand, particularly the temperature of the high-temperature converter flue gas entering the furnace mouth section flue is about 1650 ℃, and the temperature of the high-temperature converter flue gas entering the middle I section flue is about 1200 ℃, so that the axial expansion displacement of the furnace mouth section flue and the middle I section flue is larger, and the furnace mouth section flue and the middle I section flue are easy to damage after adopting a common sealing connection mode. In addition, because the first section flue and the second section flue are provided with inclined sections, and the temperature of the high-temperature converter flue gas entering the first section flue and the second section flue is over 1000 ℃, when cooling water at the inner side of each first heated pipe at the bottom of the inclined section of the first section flue and the second section flue is heated and quickly vaporized because the high-temperature converter flue gas directly scours the inner side wall of the first heated pipe, generated steam bubbles are attached to the upper part of the heated pipe, and the density of the water is higher than that of the steam and is positioned at the lower part of the heated pipe, thus the steam-water stratification phenomenon easily occurs in the first heated pipe at the bottom of the inclined section in the first section flue and the second section flue, if the steam-water mixture flows slowly due to long-time heating scouring, the conditions that the inner wall of the pipe of a local first heated pipe is attached by high-temperature steam and the outer wall of the pipe is scoured by high-temperature flue gas can occur, the first heated pipe at the bottom of the inclined section of the first section flue and the second section flue is easy to crack. The structure makes the converter waste heat boiler extremely unstable in operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: provides a vaporization cooling flue in a converter waste heat boiler, which has safe and stable operation and longer service life.
In order to achieve the above object, the utility model adopts the following technical scheme: vaporization cooling flue in converter waste heat boiler includes: the furnace mouth section flue, the middle I section flue, the middle II section flue, the middle III section flue and the tail flue are sequentially communicated from bottom to top; furnace mouth section flue, in I section flue, in II section flues, in III section flues, all include in the afterbody flue: annular import collection case and annular outlet collection case that the interval set up are provided with the water-cooling wall between annular import collection case and the annular outlet collection case, and this water-cooling wall includes: the two ends of each first heated pipe are respectively communicated with the corresponding annular inlet header and the corresponding annular outlet header; the method is characterized in that: the furnace mouth section flue and the middle I section flue are hermetically connected through an expansion compensator; spoilers are arranged in each first heated pipe within a 120-degree included angle range formed by symmetrically expanding bottom center buses of the obliquely arranged middle I-section flue and the obliquely arranged middle II-section flue at the lower section part towards two sides.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: the expansion compensator comprises: lower base, lower base includes: the bottom flange at the outer side of the inner cylinder is also welded with an annular connecting seat consisting of a ring plate and an outer peripheral plate, a plurality of reinforcing rib plates are arranged between the ring plate and the bottom flange at intervals along the circumferential direction of the outer peripheral plate, and the bottom flange can be detachably connected with a connecting flange bolt on an annular outlet header of a flue at a furnace mouth section; go up the connecting piece, go up the connecting piece and include: the top end of the outer cylinder is welded with a top flange, the top flange can be detachably connected with a connecting flange bolt on an annular inlet header of a middle I-section flue, the inner cylinder is positioned on the inner side of the outer cylinder, the top end of the inner cylinder upwards extends into the bottom of the outer cylinder, and a gap is formed between the inner cylinder and the outer cylinder; a soft non-metal composite layer is sleeved on the periphery of the outer cylinder, the upper end of the non-metal composite layer is connected to the top flange, and the lower end of the non-metal composite layer is connected to the ring plate; heat-resistant stainless steel sealing cotton is arranged between the inner cylinder body and the outer cylinder body and between the non-metal composite layer and the inner cylinder body and between the non-metal composite layer and the outer cylinder body.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: the flange on the annular export collection case of fire door section flue includes: the bottom flange is positioned above the first flange and is detachably connected with the outer section of the second flange through inverted ring bolts, and a gap is reserved between the bottom flange and the outer section of the second flange; the bottom flange bottom of the outer section top of second flange is provided with the round steel along circumference, is provided with two square steels on the outer section of second flange along circumference interval, and it has the sealing strip to fill between two square steels, and the bottom flange is through falling ring bolted connection in the outer section back of second flange, and the round steel supports and forms sealedly on the upper surface of sealing strip.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: each spoiler is in a spiral rising shape.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: the fire door section flue includes: the lower section of the furnace mouth section flue which is vertically arranged and can be positioned above the furnace mouth of the converter and the upper section of the furnace mouth section flue which is obliquely arranged; the inlet end of each first heated pipe of the furnace mouth section flue is provided with a throttle orifice plate, and the aperture of the throttle orifice plate is smaller than the inner diameter of the first heated pipe of the furnace mouth section flue; a feed opening device is arranged on the lower section of the furnace mouth section flue, and an oxygen lance opening device and a sublance opening device for oxygen blowing of a converter oxygen lance are arranged on the upper section of the furnace mouth section flue; the furnace mouth section flue can be movably supported on a plant platform through a first sliding support frame arranged on the rear side of the upper section of the furnace mouth section flue, and can be fixed on the movable trolley through a fixed support arranged on the lower section of the furnace mouth section flue.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: a first temperature and pressure measuring ring pipe is arranged at the flue gas inlet of the middle section I flue; well I section flue can be fixed on the factory building platform through setting up the first constant force dish spring gallows on I section flue in, can slide and support on the platform of factory building through the second sliding support frame that sets up on I section flue in.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: well II sections flues include: a lower section arranged obliquely and an upper section arranged vertically; the middle II section of flue can be fixed on a plant platform through a hinged support arranged on the lower section of the middle II section of flue.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: the middle III section of flue comprises: a vertically arranged lower section and an obliquely arranged upper section; an inspection manhole is arranged on the upper section of the middle-section III section flue; the middle III section of flue can be fixed on a plant platform through a second constant force disc spring supporting and hanging frame arranged on the middle III section of flue.
Further, the vaporization cooling flue in the converter waste heat boiler comprises: the afterbody flue includes: the upper section is obliquely arranged and the lower section is vertically arranged; a smoke outlet of the vaporization cooling flue is arranged at the bottom of the lower section of the tail flue, and a second temperature and pressure measuring ring pipe is arranged on the lower section of the tail flue; a plurality of spray holes are uniformly arranged on the lower section of the tail flue below the temperature and pressure measuring ring pipe at intervals along the circumferential direction; the tail flue can be fixed on the plant platform through a third constant force disc spring supporting and hanging frame arranged on the tail flue.
The utility model has the advantages that: the utility model has the advantages that: the first section of the flue of the furnace mouth section and the first section of the flue of the middle furnace mouth section are connected through the expansion compensator, so that the first section of the flue of the furnace mouth section and the first section of the flue of the middle furnace mouth section can have axial expansion allowance, the maximum axial displacement can reach 120mm, the requirement of the vaporization cooling flue on the axial displacement caused by thermal expansion is met, and the service life of the vaporization cooling flue is prolonged. And spiral ascending spoilers are arranged in the first heated pipes at the bottoms of the rear sides of the first section of the middle flue I and the second section of the middle flue II along the steam-water flow direction, so that the structure can effectively prevent the first heated pipes from bursting to ensure that the vaporization cooling flue stably runs, and the heat conversion utilization rate of the high-temperature converter flue gas is improved.
Drawings
Fig. 1 is a schematic view of a vaporization cooling flue structure in a converter waste heat boiler according to the present invention;
FIG. 2 is a structural diagram of a Z-direction flue of a furnace mouth section in FIG. 1;
FIG. 3 is an enlarged schematic view of section I of FIG. 2;
FIG. 4 is a Z-direction structure diagram of a section I flue in FIG. 1;
FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4;
FIG. 6 is a schematic structural diagram of a spoiler;
FIG. 7 is a schematic view of a portion of an expansion compensator;
FIG. 8 is a Z-direction structure diagram of the section II flue in FIG. 1;
FIG. 9 is a Z-direction structural schematic view of a section III flue in FIG. 1;
FIG. 10 is a schematic structural view of a back pass.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, the evaporative cooling flue in the converter waste heat boiler includes: the furnace mouth section flue 2, the middle I section flue 3, the middle II section flue 4, the middle III section flue 5 and the tail flue 6 are communicated in sequence. Furnace mouth section flue 2, in I section flue 3, in II section flues 2, in III section flues 5, all include in the afterbody flue 6: be provided with the water-cooling wall between annular import collection box, annular export collection box annular import collection box, the annular export collection box, this water-cooling wall includes: the two ends of each first heated pipe are respectively communicated with the corresponding annular inlet header and the corresponding annular outlet header.
As shown in fig. 1, 2, and 3, the throat section flue 2 includes: the lower section of the furnace mouth section flue which is vertically arranged and positioned above the furnace mouth of the converter and the upper section of the furnace mouth section flue which is obliquely arranged. An annular inlet header 21 of the furnace mouth section flue is arranged on the upper section of the furnace mouth section flue, an annular outlet header 23 of the furnace mouth section flue is arranged on the top of the upper section of the furnace mouth section flue, and a plurality of first heated pipes 22 forming a water-cooled wall of the furnace mouth section flue are arranged between the annular inlet header 21 of the furnace mouth section flue and the annular outlet header 23 of the furnace mouth section flue along the circumferential direction. The lower section of the furnace mouth section flue is provided with a feed opening device 26, the upper section of the furnace mouth section flue is provided with an oxygen lance opening device 24 and a sublance opening device 25 which are used for oxygen blowing of a converter oxygen lance, and the feed opening device 26, the oxygen lance opening device 24 and the sublance opening device 25 are common devices in the field of converter waste heat boilers and are not described again. For convenience of description, the side of the tuyere section flue where the lance opening installation 24 is located in FIG. 4 is defined as the front side. The furnace mouth section flue 2 is movably supported on the plant platform through a first sliding support frame 27 arranged on the rear side of the upper section of the furnace mouth section flue and is fixed on the movable trolley through a fixed support 28 arranged on the lower section of the furnace mouth section flue. In order to ensure that the deoxygenated water entering the annular inlet header 21 of the furnace mouth section flues enters the first heated pipes 22 of each furnace mouth section flue as uniformly and orderly as possible, the inlet of the first heated pipe 22 of each furnace mouth section flue is provided with a throttling orifice plate 29, so that the first heated pipe 22 of each furnace mouth section flue is communicated with the annular inlet header 21 of the furnace mouth section flue through a throttling hole on the throttling orifice plate 29, and the caliber of the throttling hole on the throttling orifice plate 29 is smaller than the inner diameter of the first heated pipe 22. After the high-temperature converter flue gas is cooled by the water-cooled wall of the flue at the furnace mouth section, the temperature of the high-temperature converter flue gas entering the flue at the middle section I is about 1200 ℃.
As shown in fig. 1, 4, 5 and 6, the middle section i flue 3 is obliquely arranged, and a flue gas inlet of the middle section i flue 3 is butted with a flue gas outlet of the furnace mouth flue 2 through an expansion compensator 7. Well I section flue 3 includes: the annular inlet header 31 of the middle I section flue and the annular outlet header 33 of the middle I section flue are positioned above the annular inlet header 31 of the middle I section flue, and a plurality of first heating pipes 32 forming the water-cooled wall of the middle I section flue are arranged between the annular inlet header 31 of the middle I section flue and the annular outlet header 33 of the middle I section flue along the circumferential direction. Well I section flue 3 can be fixed on the factory building platform through the first constant force dish spring gallows 34 that sets up on it, can slide and support on the platform of factory building through the second sliding support frame 35 that sets up on well I section flue 3. A first temperature and pressure measuring ring pipe 36 for measuring the temperature and the pressure of the high-temperature converter flue gas entering the middle I section flue 3 is arranged at the flue gas inlet of the middle I section flue 3. Spoilers 321 in a spiral rising shape are arranged in the first heated pipe 32 at the bottom of the rear side of the middle I-section flue 3 along the steam-water flow direction, and the upper end and the lower end of each spoiler 321 are fixed on the inner wall of the corresponding first heated pipe 32. The range of the first heated pipe 32 provided with the spoiler 321 in the middle i-section flue 3 is as follows: referring to fig. 5, spoilers 321 are arranged in each first heated pipe 32 within an included angle range of 120 degrees formed by symmetrically expanding a central bus at the bottom of the rear side of the middle-I section flue towards two sides. The purpose of the spoiler 321 is to: after cooling water on the inner side of each first heated pipe 32 at the bottom in the obliquely arranged middle-I section flue is heated and quickly vaporized by directly flushing the inner side wall of the first heated pipe 32 with high-temperature converter flue gas, generated steam bubbles are attached to the upper part of the first heated pipe 32, and the water with the density higher than that of steam is positioned at the lower part of the first heated pipe 32, so that steam-water stratification is easily generated in the first heated pipe 32 at the bottom of the middle-I section flue, if the steam-water mixture flows slowly due to long-time hot flushing, the part of the first heated pipe 32 is easy to burst, cooling water in the first heated pipe 32 provided with the spoiler 321 can spirally rise after the spoiler 321 is arranged, and the effects of forcibly guiding water flow and strengthening heat transfer are achieved, so that the phenomenon of steam-water stratification does not occur in the first heated pipe 32 provided with the spoiler 321, the situation that the inner wall of the local pipe wall of the first heated pipe 32 is attached by high-temperature steam and the outer wall of the local pipe wall of the first heated pipe 32 is washed by high-temperature flue gas due to steam-water stratification can not occur, on one hand, the pipe bursting caused by fatigue phenomenon or even creep deformation of the material of each first heated pipe 32 can be prevented, so that the converter waste heat boiler can be ensured to stably operate, on the other hand, water flow can be guided forcibly, heat transfer is enhanced, and the heat conversion utilization rate of the high-temperature converter flue gas is further improved.
As shown in fig. 7, the expansion compensator 7 includes: lower base, lower base includes: the bottom end of the inner cylinder 712 is welded with a bottom flange 711, the bottom flange 711 at the outer side of the inner cylinder is also welded with an annular connecting seat consisting of a ring plate 714 and a peripheral plate 713, a plurality of reinforcing rib plates 715 are arranged between the ring plate 714 and the bottom flange 711 at intervals along the peripheral plate in the circumferential direction, and the bottom flange 711 can be detachably connected with a connecting flange bolt on the annular outlet header 23 of the flue at the furnace mouth section; go up the connecting piece, go up the connecting piece and include: the top end of the outer cylinder 732 is welded with a top flange 731, the top flange 731 can be detachably connected with a connecting flange 311 on the annular inlet header 31 of the middle I-section flue through bolts, the inner cylinder 712 is positioned on the inner side of the outer cylinder 732, the top end of the inner cylinder 712 extends upwards into the bottom of the outer cylinder 732, and a gap is formed between the inner cylinder 712 and the outer cylinder 732; the periphery of the outer cylinder 732 is also sleeved with a soft non-metal composite layer 72, the upper end of the non-metal composite layer 72 is connected to the bottom of the top flange 731 through a top plate 721 bolt, and the lower end of the non-metal composite layer 72 is connected to the annular plate 714 through a bottom pressing plate 722; heat-resistant sealing cotton 76 is arranged between the inner cylinder and the outer cylinder and between the non-metal composite layer 72 and the inner cylinder and the outer cylinder, and in the embodiment, the heat-resistant sealing cotton 76 is glass fiber cloth-aluminum silicate fiber cotton. The plurality of reinforcing rib plates 715 arranged between the ring plate 714 and the bottom flange 711 at intervals along the circumferential direction of the peripheral plate enable the non-metal composite layer 72 to be stably supported on the ring plate 714. When the converter is smelted, the furnace mouth section flue 2 and the I section flue 3 are heated to expand, the lower base of the expansion compensator 7 moves upwards and the upper connecting piece moves downwards, the soft non-metal composite layer 72 is generally made of silica gel, the middle part of the upper and lower ends of the soft non-metal composite layer protrudes outwards after being pressed, the furnace mouth section flue 2 and the I section flue 3 can axially expand, the maximum axial displacement can reach 120mm, the axial displacement requirement of the vaporization cooling flue for heating expansion is met, and the service life of the converter waste heat boiler is prolonged.
In this embodiment, a heat-resistant insulating layer for preventing the high-temperature converter flue gas from damaging the inner cylinder is disposed on the inner sidewall of the inner cylinder 712, and a heat-resistant insulating layer 75 is disposed between the middle i-section flue above the inner cylinder 712 and the outer cylinder 732 to prevent the high-temperature converter flue gas from damaging the outer cylinder 732. In practical application, the heat-resistant insulation cotton 75 can be aluminum silicate fiber cotton covered by a stainless steel wire mesh. The flange on annular export collection case 23 of fire door section flue includes: the first flange 231 is fixed on the annular outlet header, the inner section of the second flange 232 is welded at the bottom of the first flange 231, the bottom flange 711 is positioned above the first flange 231 and is detachably connected with the outer section of the second flange 232 through an inverted ring bolt with one end hinged to the outer section of the second flange, and a gap is reserved between the bottom flange 711 and the outer section of the second flange 232; bottom flange 711 bottom of the outer section top of second flange 232 is provided with round steel 741 along circumference, is provided with two square steels 742 on the outer section of second flange along circumference interval, it has sealing strip 743 to fill between two square steels 742, bottom flange 711 passes through the back-up ring bolted connection in the outer section back of second flange 232, round steel 741 supports and forms sealedly on the upper surface of sealing strip 743, and this kind of seal structure can prevent that high temperature converter flue gas from leaking in the gap between bottom flange 711 and first flange 231.
As shown in figures 1 and 8, the flue gas inlet of the middle II-section flue 4 is in sealed butt joint with the flue gas outlet of the middle I-section flue 3. The middle II section of flue 4 comprises: the lower section that sets up and the upper segment that sets up vertically. An annular inlet header 41 of the middle II-section flue is arranged at the bottom end of the lower section of the middle II-section flue, an annular outlet header 43 of the middle II-section flue is arranged at the top end of the upper section of the middle II-section flue, and a plurality of first heating pipes 42 forming a water-cooled wall of the middle II-section flue are arranged between the annular inlet header 41 of the middle II-section flue and the annular outlet header 43 of the middle II-section flue along the circumferential direction. The middle II section flue 4 can be fixed on a factory platform through a hinged support 44. As in the first section flue 3, spirally rising spoilers are arranged in the first heated pipe 42 at the bottom of the rear side of the second section flue 4 along the steam-water flow direction, and two ends of each spoiler are fixed on the inner wall of the corresponding first heated pipe 42. The range of the first heated pipe 42 of the middle II-section flue provided with the spoiler is as follows: referring to fig. 5, spoilers are disposed in each first heated tube 42 within an included angle of 120 ° formed by symmetrically expanding a central bus at the bottom of the rear side of the middle-second section of flue to both sides.
As shown in fig. 1 and fig. 9, the flue gas inlet of the middle section iii flue 5 is in sealed butt joint with the flue gas outlet of the middle section ii flue 4. The middle III section flue 5 comprises: a vertically arranged lower section and an obliquely arranged upper section. An annular inlet header 51 of the middle III section flue 5 is arranged at the bottom end of the lower section of the middle III section flue, an annular outlet header 53 of the middle III section flue 5 is arranged at the upper section outlet of the III section flue, and a plurality of first heating pipes 52 forming a water-cooled wall of the middle III section flue are arranged between the annular inlet header 51 of the middle III section flue 5 and the annular outlet header 53 of the middle III section flue along the circumferential direction. An inspection manhole 54 for inspection and ash removal is arranged on the upper section of the middle-III section flue 5. The middle III section flue 5 can be fixed on a factory platform through a constant force disc spring supporting hanger 55.
As shown in fig. 1 and 10, the back pass 6 includes: the upper segment that sets up and the hypomere that sets up vertically. The flue gas inlet of the tail flue 6 is positioned on the upper section and is in sealed butt joint with the flue gas outlet of the upper section of the middle III section flue 5, the flue gas outlet of the tail flue 6 is positioned at the bottom of the lower section, and the flue gas outlet can be communicated with a steam cooler. An annular inlet header 61 of the tail flue 6 is arranged on the lower section, an annular outlet header 63 of the tail flue 6 is arranged at a flue gas inlet of the tail flue 6, and a plurality of first heated pipes 62 forming a water-cooled wall of the tail flue 6 are arranged between the annular inlet header 61 of the tail flue 6 and the annular outlet header 63 of the tail flue 6 along the circumferential direction. The tail flue 6 can be fixed on the platform of the factory building through a constant force disc spring supporting and hanging bracket 64. A plurality of spraying holes 66 are uniformly arranged at the flue gas outlet at the lower end of the tail flue 6 along the circumferential direction at intervals, and a plurality of spray guns on the steam cooler can spray steam downwards through the corresponding spraying holes 66. A second temperature and pressure measuring ring pipe 65 for measuring the temperature and the pressure of the high-temperature converter flue gas at the flue gas outlet of the tail flue 6 is arranged on the lower section of the tail flue 6 above the spraying holes 66.
The utility model has the advantages that: the first section of the flue 2 at the furnace mouth and the first section of the flue 3 at the middle part are connected through an expansion compensator 7, so that the first section of the flue 2 at the furnace mouth and the first section of the flue 3 at the middle part can have axial expansion allowance, the maximum axial displacement can reach 120mm, the requirement of the vaporization cooling flue on the axial displacement caused by thermal expansion is met, and the service life of the vaporization cooling flue is prolonged. And second, spiral ascending spoilers 321 are respectively arranged in the first heated pipes at the bottoms of the rear sides of the first section flue and the second section flue along the steam-water flow direction, so that the structure can effectively prevent the first heated pipes from bursting to ensure that the vaporization cooling flue stably runs, and the heat conversion utilization rate of the high-temperature converter flue gas is improved.
Claims (9)
1. Vaporization cooling flue in converter waste heat boiler includes: the furnace mouth section flue, the middle I section flue, the middle II section flue, the middle III section flue and the tail flue are sequentially communicated from bottom to top; furnace mouth section flue, in I section flue, in II section flues, in III section flues, all include in the afterbody flue: annular import collection case and annular outlet collection case that the interval set up are provided with the water-cooling wall between annular import collection case and the annular outlet collection case, and this water-cooling wall includes: the two ends of each first heated pipe are respectively communicated with the corresponding annular inlet header and the corresponding annular outlet header; the method is characterized in that: the furnace mouth section flue and the middle I section flue are hermetically connected through an expansion compensator; spoilers are arranged in each first heated pipe within a 120-degree included angle range formed by symmetrically expanding bottom center buses of the obliquely arranged middle I-section flue and the obliquely arranged middle II-section flue at the lower section part towards two sides.
2. The evaporative cooling flue in a converter waste heat boiler of claim 1, wherein: the expansion compensator comprises: lower base, lower base includes: the bottom flange at the outer side of the inner cylinder is also welded with an annular connecting seat consisting of a ring plate and an outer peripheral plate, a plurality of reinforcing rib plates are arranged between the ring plate and the bottom flange at intervals along the circumferential direction of the outer peripheral plate, and the bottom flange can be detachably connected with a connecting flange bolt on an annular outlet header of a flue at a furnace mouth section; go up the connecting piece, go up the connecting piece and include: the top end of the outer cylinder is welded with a top flange, the top flange can be detachably connected with a connecting flange bolt on an annular inlet header of a middle I-section flue, the inner cylinder is positioned on the inner side of the outer cylinder, the top end of the inner cylinder upwards extends into the bottom of the outer cylinder, and a gap is formed between the inner cylinder and the outer cylinder; a soft non-metal composite layer is sleeved on the periphery of the outer cylinder, the upper end of the non-metal composite layer is connected to the top flange, and the lower end of the non-metal composite layer is connected to the ring plate; heat-resistant stainless steel sealing cotton is arranged between the inner cylinder body and the outer cylinder body and between the non-metal composite layer and the inner cylinder body and between the non-metal composite layer and the outer cylinder body.
3. The evaporative cooling flue in a converter waste heat boiler of claim 2, wherein: the flange on the annular export collection case of fire door section flue includes: the bottom flange is positioned above the first flange and is detachably connected with the outer section of the second flange through inverted ring bolts, and a gap is reserved between the bottom flange and the outer section of the second flange; the bottom flange bottom of the outer section top of second flange is provided with the round steel along circumference, is provided with two square steels on the outer section of second flange along circumference interval, and it has the sealing strip to fill between two square steels, and the bottom flange is through falling ring bolted connection in the outer section back of second flange, and the round steel supports and forms sealedly on the upper surface of sealing strip.
4. The evaporative cooling flue in a converter waste heat boiler of claim 1, wherein: each spoiler is in a spiral rising shape.
5. The evaporative cooling flue in a converter waste heat boiler as defined in claim 1, 2, 3 or 4 wherein: the fire door section flue includes: the lower section of the furnace mouth section flue which is vertically arranged and can be positioned above the furnace mouth of the converter and the upper section of the furnace mouth section flue which is obliquely arranged; the inlet end of each first heated pipe of the furnace mouth section flue is provided with a throttle orifice plate, and the aperture of the throttle orifice plate is smaller than the inner diameter of the first heated pipe of the furnace mouth section flue; a feed opening device is arranged on the lower section of the furnace mouth section flue, and an oxygen lance opening device and a sublance opening device for oxygen blowing of a converter oxygen lance are arranged on the upper section of the furnace mouth section flue; the furnace mouth section flue can be movably supported on a plant platform through a first sliding support frame arranged on the rear side of the upper section of the furnace mouth section flue, and can be fixed on the movable trolley through a fixed support arranged on the lower section of the furnace mouth section flue.
6. The evaporative cooling flue in a converter waste heat boiler as defined in claim 1, 2, 3 or 4 wherein: a first temperature and pressure measuring ring pipe is arranged at the flue gas inlet of the middle section I flue; well I section flue can be fixed on the factory building platform through setting up the first constant force dish spring gallows on I section flue in, can slide and support on the platform of factory building through the second sliding support frame that sets up on I section flue in.
7. The evaporative cooling flue in a converter waste heat boiler as defined in claim 1, 2, 3 or 4 wherein: well II sections flues include: a lower section arranged obliquely and an upper section arranged vertically; the middle II section of flue can be fixed on a plant platform through a hinged support arranged on the lower section of the middle II section of flue.
8. The evaporative cooling flue in a converter waste heat boiler as defined in claim 1, 2, 3 or 4 wherein: the middle III section of flue comprises: a vertically arranged lower section and an obliquely arranged upper section; an inspection manhole is arranged on the upper section of the middle-section III section flue; the middle III section of flue can be fixed on a plant platform through a second constant force disc spring supporting and hanging frame arranged on the middle III section of flue.
9. The evaporative cooling flue in a converter waste heat boiler as defined in claim 1, 2, 3 or 4 wherein: the afterbody flue includes: the upper section is obliquely arranged and the lower section is vertically arranged; a smoke outlet of the vaporization cooling flue is arranged at the bottom of the lower section of the tail flue, and a second temperature and pressure measuring ring pipe is arranged on the lower section of the tail flue; a plurality of spraying holes are uniformly arranged on the lower section of the tail flue below the second temperature and pressure measuring ring pipe at intervals along the circumferential direction; the tail flue can be fixed on the plant platform through a third constant force disc spring supporting and hanging frame arranged on the tail flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022915739.9U CN214148864U (en) | 2020-12-08 | 2020-12-08 | Vaporization cooling flue in converter waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022915739.9U CN214148864U (en) | 2020-12-08 | 2020-12-08 | Vaporization cooling flue in converter waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214148864U true CN214148864U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022915739.9U Active CN214148864U (en) | 2020-12-08 | 2020-12-08 | Vaporization cooling flue in converter waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214148864U (en) |
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2020
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