Evaporation cooling device for high-temperature flue gas

Abstract

The utility model provides a high-temperature flue gas evaporation cooling device which comprises a converter and an evaporation cooling flue, one end of the evaporation cooling flue is connected with the output end of the converter, the evaporation cooling flue is composed of a plurality of water cooling wall sections, and at least one heat accumulator section is fixedly arranged in the evaporation cooling flue. A phase change heat storage material is distributed in the heat accumulator section; an oxygen blowing gun opening is fixedly arranged at one end, close to the converter, of the evaporative cooling flue, and a water-cooled high-temperature-resistant gate valve is fixedly arranged on the evaporative cooling flue based on the lower portion of the oxygen blowing gun opening. The evaporative cooling flue is provided with the phase change heat storage device and filled with the phase change heat storage materials, when the temperature of passing flue gas is lower than the set temperature, the phase change heat storage materials are subjected to phase change and release heat, and the phenomenon that the water cooling wall section suffers from alternating thermal stress due to the flue gas temperature difference is avoided; and a water-cooled high-temperature-resistant gate valve is arranged, so that excessive cold air suction is reduced, and the alternating thermal stress of the evaporative cooling flue is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving and environment -friendly equipment technical field especially relates to a high temperature flue gas's vaporization cooling device. BACKGROUND

[0002] The main steelmaking process of steel enterprise is converter steelmaking, which produces gas containing mainly carbon monoxide, a small amount of carbon dioxide and other trace components in the blowing process, and also contains a large amount of oxidized iron, metal iron particles and other fine particulate solids, which seriously pollutes the atmosphere and workshop environment. Therefore, improving the technical level of converter dust removal system, recycling and utilizing converter gas and recycling flue gas waste heat are of great significance for energy saving and consumption reduction of steelmaking, effective control and reduction of steelmaking air pollutant emissions and environmental pollution reduction.

[0003] The converter vaporization cooling flue is a flue type waste heat boiler, which is widely used in recycling the heat in the high-temperature dust-containing flue gas and gas generated during the converter steelmaking of the steel plant. The converter vaporization cooling flue is directly applied to the production process of converter steelmaking and directly participates in production as part of the steelmaking process of the steel plant.

[0004] The converter production process, namely oxygen blowing smelting, is not continuous, therefore, the temperature of the flue gas in the vaporization cooling flue is always in the working state of alternating heating and cooling, causing great alternating thermal stress of the vaporization cooling flue. Under the action of alternating thermal stress, the service life of the vaporization cooling flue is short, and the daily maintenance and repair workload is large, which also greatly affects the converter steelmaking production to some extent. How to ensure that the temperature of the flue gas output from the tail flue of the converter vaporization cooling flue is between 800-000 DEG C, and also ensure the safe and stable operation and long service life of the vaporization cooling flue is also a technical problem that the field is very concerned about. CONTENT OF THE UTILITY MODEL

[0005] The utility model solves the technical problem of overcoming the defects in the prior art, and provides a vaporization cooling device for high-temperature flue gas, which controls the temperature of the flue gas output from the tail flue to be between 800-1000 DEG C, and ensures the safe and stable operation and long service life of the vaporization cooling flue.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of a high-temperature flue gas vaporization cooling device, which comprises a converter and a vaporization cooling flue, one end of the vaporization cooling flue is sealingly connected with the output end of the converter, the vaporization cooling flue is composed of a plurality of water cooling wall segments, at least one regenerator segment is fixedly arranged in the vaporization cooling flue, and phase change heat storage materials are arranged in the regenerator segment.

[0007] The phase change heat storage material can be any one of a metal and alloy type phase change heat storage material, a molten salt type phase change heat storage material, a carbonate type phase change heat storage material, a metal-based composite phase change material, and a ceramic-based composite phase change material. The alloy type phase change heat storage material includes aluminum-silicon alloy phase change heat storage material and copper alloy phase change heat storage material. The molten salt type phase change heat storage material includes fluorine salt and eutectic compounds thereof, such as LiF-NaF-KF eutectic salt. The carbonate type phase change composite material is, for example, Li2CO3-Na2CO3-K2CO3 eutectic salt. The metal-based composite phase change material includes, for example, aluminum-based / silicon carbide composite phase change material. The ceramic-based composite phase change material includes, for example, zirconia / inorganic salt composite phase change material. The above materials can be selected as needed.

[0008] An oxygen lance nozzle is fixedly arranged on the upper end of the vaporization cooling flue close to the converter. A water-cooled high-temperature-resistant plug valve is fixedly arranged on the vaporization cooling flue below the oxygen lance nozzle.

[0009] Further, the vaporization cooling flue comprises a connecting section, a straight section, and a curved section connected in sequence. The connecting section and the curved section are composed of water-cooled wall sections. The straight section is composed of a plurality of water-cooled wall sections. Adjacent water-cooled wall sections are connected by heat accumulator sections.

[0010] Further, the heat accumulator sections arranged on the straight section comprise a first heat accumulator section and a second heat accumulator section. The first heat accumulator section is fixedly arranged on the straight section close to the connecting section. The oxygen lance nozzle and the water-cooled high-temperature-resistant plug valve are fixedly arranged on the water-cooled wall section between the first heat accumulator section and the connecting section.

[0011] Further, a water-cooled high-temperature-resistant valve is fixedly arranged on the straight section away from the oxygen lance nozzle and the water-cooled high-temperature-resistant plug valve on the side of the first heat accumulator section. The valve is used for injecting high-temperature flue gas into the vaporization cooling flue.

[0012] Further, the heat accumulator section comprises a plurality of smoke passing inner cavities arranged in the height direction of the heat accumulator section. An insulation layer is wrapped on the outside of the heat accumulator section.

[0013] The smoke passing inner cavities are cylindrical structures. The smoke passing inner cavities comprise a first smoke passing inner cavity fixedly arranged at the center of the heat accumulator section and a plurality of second smoke passing inner cavities arranged radially along the heat accumulator section. The intervals between each circle of second smoke passing inner cavities are the same. In each circle of second smoke passing inner cavities, the intervals between adjacent second smoke passing inner cavities are the same. Phase change heat storage material is arranged in the gaps between the second smoke passing inner cavities.

[0014] Further, the heat accumulator section comprises a plurality of smoke passing inner cavities arranged in the height direction of the heat accumulator section. An insulation layer is wrapped on the outside of the heat accumulator section.

[0015] The smoke passage inner cavity comprises a first smoke passage inner cavity located at the center of the regenerator section and a plurality of second smoke passage inner cavities radially arranged around the first smoke passage inner cavity, the first smoke passage inner cavity is a cylindrical hole, and the plurality of second smoke passage inner cavities are split based on the center of the first smoke passage inner cavity, the central angle of each second smoke passage inner cavity is the same, and phase change heat storage materials are arranged on the outer edge surface of the second smoke passage inner cavity.

[0016] The aforementioned heat preservation and insulation layer can be any one of nanoscale microporous insulation materials, heat insulation and preservation coatings, ceramic fibers and composite insulation materials, and can be selected as required.

[0017] Further, the water-cooled wall section comprises a water-cooled wall body and a plurality of water-cooled pipes arranged based on the water-cooled wall body.

[0018] Further, the curved section is composed of an odd number of water-cooled wall sections connected in sequence, and a high-temperature-resistant spring self-resetting explosion venting device is further arranged on the curved section.

[0019] Further, the vaporization cooling flue is communicated with the output end of the converter through a movable smoke hood and a hood skirt.

[0020] Compared with the prior art, the beneficial effects of the utility model include:

[0021] 1) A phase change heat storage device is arranged on the straight section of the vaporization cooling flue, and phase change heat storage materials are filled in the phase change heat storage device, when the temperature of the passing flue gas is less than the set temperature, the phase change heat storage materials change phase and release heat, so as to ensure that the temperature of the passing flue gas is maintained within the set temperature range, so that the temperature of the flue gas passing through the water-cooled wall section is relatively constant, the water-cooled wall section is prevented from being subjected to alternating thermal stress due to the difference in flue gas temperature, the service life of the water-cooled wall pipe of the vaporization cooling flue is effectively prolonged, the daily maintenance and repair workload of the vaporization cooling flue is minimized, and the stability and reliability of the converter steelmaking production are ensured; a water-cooled high-temperature-resistant gate valve is arranged at the front section of the straight section, which is used for adjusting the air volume drawn into the vaporization cooling flue port after the converter finishes oxygen blowing smelting, so as to reduce the excessive cold air suction, thereby further reducing the alternating thermal stress of the vaporization cooling flue.

[0022] 2) A hot air inlet is further arranged on the straight section of the vaporization cooling flue, the hot air inlet is arranged behind the water-cooled high-temperature-resistant gate valve, and is used for adjusting the flue gas temperature passing through the vaporization cooling flue, thereby further reducing the sudden thermal stress of the vaporization cooling flue. BRIEF DESCRIPTION OF DRAWINGS

[0023] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference signs are used to refer to the same parts. Among them:

[0024] Figure 1 The overall structure of the high-temperature flue gas vaporization cooling device is schematically shown;

[0025] Figure 2 The cross-sectional structure of the first embodiment of the regenerator section is schematically shown;

[0026] Figure 3 The cross-sectional structure of the second embodiment of the regenerator section is schematically shown;

[0027] Figure 4 The layout of the water cooling pipe in the water cooling wall section is schematically shown;

[0028] Figure 5 The overall structure of the converter primary flue gas pure dry method purification treatment system is schematically shown.

[0029] Reference signs in the drawings: 1-converter, 2-vaporization cooling flue, 3-connection section, 4-straight section, 5-bent section, 6-movable hood and hood skirt, 7-water cooling wall section, 8-water cooling pipe, 9-first regenerator section, 10-second regenerator section, 11-oxygen lance, 12-water cooled high-temperature plug valve, 13-water cooled high-temperature valve, 14-high-temperature spring self-resetting explosion relief device, 15-first smoke passing inner cavity, 16-second smoke passing inner cavity, 17-thermal insulation layer, 18-gas burner, 19-high-temperature phase change type regenerator, 20-water cooled three-way high-temperature reversing valve, 21-quenching type waste heat boiler, 22-dust collector, 23-flue gas waste heat recovery device, 24-axial flow fan, 25-switching valve, 26-diffusion chimney, 27-gas tank, 28-first water cooled two-way high-temperature reversing valve, 29-second water cooled two-way high-temperature reversing valve, 30-phase change regenerator material. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or as a limitation or restriction of the technical scheme of the present application.

[0031] Figure 1 The overall structure of the high-temperature flue gas vaporization cooling device is schematically shown, a high-temperature flue gas vaporization cooling device such as Figure 1As shown, including converter 1 and vapor cooling flue 2, one end of vapor cooling flue 2 is connected with the output end of converter 1 with movable hood and hood skirt 6, for meeting the sealing connection requirements between vapor cooling flue 2 and the output end of converter 1, while taking into account the adjustment needs of the relative angular position between the two. The aforementioned vapor cooling flue 2 is composed of several water-cooled walls, at least one regenerator section is fixedly arranged in the vapor cooling flue 2, and the phase change heat storage material 30 is arranged in the regenerator section. The oxygen blowing smelting process of converter 1 is not continuous due to its process characteristics, so the flue gas temperature in the vapor cooling flue 2 is always in a heating and cooling alternating cycle state, thereby causing the alternating thermal stress of the vapor cooling flue 2 to be very large, especially for the water-cooled wall section 7, which has a significant damage to its service life. By arranging the regenerator section therein, such as the high temperature section of the phase change heat storage material 30, the temperature range of which is 1250-1650℃, when the flue gas temperature passing through the regenerator section is lower than the aforementioned temperature range, the phase change heat storage material 30 releases heat when it changes phase, thereby ensuring that the water-cooled wall section 7 is within the set temperature range (i.e. 350-550℃), thereby avoiding the effect of alternating thermal stress of the vapor cooling flue 2 water-cooled wall pipe, effectively improving the service life of the vapor cooling flue 2 water-cooled wall pipe, and minimizing the daily maintenance and repair workload of the vapor cooling flue 2, ensuring the stability and reliability of the converter 1 steelmaking production.

[0032] The oxygen blowing lance 11 is fixedly arranged on the end of the aforementioned vapor cooling flue 2 close to the converter 1 (i.e. the inlet end of the vapor cooling flue 2), and the water-cooled high-temperature resistant plug valve 12 is fixedly arranged above the vapor cooling flue 2 below the aforementioned oxygen blowing lance 11. After the converter 1 finishes oxygen blowing smelting, the length of the valve plate of the calcium water-cooled high-temperature resistant plug valve 12 extending into the vapor cooling flue 2 is adjusted, thereby adjusting the amount of air drawn into the vapor cooling flue 2, reducing the intake of excess cold air, ensuring the temperature inside the vapor cooling flue 2, and reducing the alternating thermal stress of the vapor cooling flue 2.

[0033] The vaporization cooling flue 2 is described in detail below. The vaporization cooling flue 2 includes a connecting section 3, a straight section 4, and a curved section 5 connected in sequence. Both the connecting section 3 and the curved section 5 are composed of water-cooled wall sections 7. The straight section 4 is composed of several water-cooled wall sections 7, and adjacent water-cooled wall sections 7 are connected and connected by a heat accumulator section. In some embodiments, the heat accumulator section disposed on the straight section 4 includes a first heat accumulator section 9 and a second heat accumulator section 10. Therefore, the straight section 4 includes three water-cooled wall sections 7. The aforementioned first heat accumulator section 9 is fixedly disposed on the straight section 4 close to the connecting section 3. The oxygen lance nozzle 11 and the water-cooled high-temperature resistant slide valve 12 are fixedly disposed on the first water-cooled wall section 7, and this water-cooled wall section 7 is smoothly connected to the connecting section 3. A water-cooled high-temperature valve 13 is fixedly installed on the second water-cooled wall section 7 above the straight section 4. The aforementioned water-cooled high-temperature valve 13 is fixedly installed on the side of the first accumulator section 9 away from the oxygen blowing nozzle 11 and the water-cooled high-temperature resistant slide valve 12. High-temperature flue gas can be injected into the straight section 4 through the aforementioned water-cooled high-temperature valve 13 to regulate the flue gas temperature passing through the vaporization cooling flue 2, and further reduce the alternating thermal stress of the vaporization cooling flue 2.

[0034] The following is a detailed description of the heat storage section. The heat storage section includes several flue gas cavities extending through it along its height. An insulation layer 17 is wrapped around the outside of the heat storage section. However, the internal layout of the heat storage section can vary, as detailed below:

[0035] Example 1

[0036] like Figure 2 As shown, the first flue gas cavity 15 and the second flue gas cavity 16 provided in the heat accumulator section are both cylindrical structures, including a first flue gas cavity 15 fixedly provided at the center of the heat accumulator section and multiple rings of second flue gas cavities 16 arranged radially. The interval between each ring of second flue gas cavities 16 is the same, and the interval between adjacent second flue gas cavities 16 in each ring is the same. The phase change heat storage material 30 is arranged in the gaps of the second flue gas cavities 16.

[0037] For example, three rings of second smoke passage cavities 16 are arranged radially along the accumulator section. The innermost ring (i.e., the first ring) of second smoke passage cavities 16 consists of 6 second smoke passage cavities 16, the second ring of second smoke passage cavities 16 consists of 12 second smoke passage cavities 16, and the outermost ring (i.e., the third ring) of second smoke passage cavities 16 consists of 18 second smoke passage cavities 16. The positions of the aforementioned second smoke passage cavities 16 are determined by dividing the accumulator based on the center point according to the central angle.

[0038] It is worth noting that in some embodiments, the diameter of a first flue gas cavity 15 located at the center of the heat accumulator section may differ from that of multiple rings of second flue gas cavities 16 arranged radially, in order to distinguish them.

[0039] Example 2

[0040] like Figure 3 As shown, the heat storage section includes several smoke-venting cavities opened along the height direction of the heat storage section, and the heat storage section is wrapped with a heat insulation layer 17. The smoke-venting cavities include a first smoke-venting cavity 15 located at the center of the heat storage section and a second smoke-venting cavity 16 arranged radially around the first smoke-venting cavity 15. The first smoke-venting cavity 15 is a cylindrical channel, and the multiple rings of second smoke-venting cavities 16 are divided into multiple individual second smoke-venting cavities 16 based on the center of the first smoke-venting cavity 15. The central angle of each individual second smoke-venting cavity 16 is the same, and phase change heat storage material 30 is arranged on the outer edge surface of the second smoke-venting cavity 16.

[0041] For example, after setting a first smoke vent cavity 15 at the center of the heat accumulator, three annular cavities are set on the outer side of the first smoke vent cavity 15 in the heat accumulator section. Then, the aforementioned three annular cavities are split according to a central angle of 45° to form multiple second smoke vent cavities 16. That is, the second smoke vent cavity 16 is actually arc-shaped, and each annular cavity contains eight second smoke vent cavities 16. The spacing between adjacent smoke vent cavities in each ring of second smoke vent cavities 16 is exactly the same, and the spacing between multiple rings of second smoke vent cavities 16 in the radial direction can be set according to actual requirements.

[0042] It is worth noting that in the two innermost rings of second flue gas cavities 16, any three of them do not have phase change heat storage material 30 arranged on their outer sides. In the outermost ring of second flue gas cavities 16, only one has phase change heat storage material 30 arranged on its outer side, and a thermal insulation layer 17 is provided on the side of this second flue gas cavity 16 facing the heat accumulator section. The arrangement of the aforementioned phase change heat storage material 30 can be based on the specific location of the second flue gas cavities 16, and is not limited to the aforementioned implementation method.

[0043] The water-cooled wall section 7 includes a water-cooled wall body and a plurality of water-cooled pipes 8 arranged based on the water-cooled wall body. The water-cooled wall body may be a hollow structure, and the plurality of water-cooled pipes 8 are fixedly arranged and fixed within the aforementioned water-cooled wall body. Figure 4 As shown, several water-cooled pipes 8 are fixed together in an externally tangential manner. The cooling process of the flue gas flowing through the water-cooled wall section 7 can be completed by introducing a refrigerant such as cooling water into the water-cooled pipes 8.

[0044] The aforementioned curved section 5 is composed of odd-numbered water-cooled wall sections 7 connected end to end, and a high-temperature-resistant spring self-resetting explosion relief device 14 is arranged above the curved section 5 to complete the pressure relief process of the vaporization cooling flue 2. The water-cooled wall sections 7 that form the curved section 5 have a shorter length on the inner side than on the outer side, so that a curved structure can be formed after the water-cooled wall sections 7 are connected end to end, and the aforementioned connection method can be used between the connecting section 3 and the straight section 4 and between the straight section 4 and the curved section 5, and the high-temperature-resistant spring self-resetting explosion relief device 14 is fixedly arranged on the top of the outer side of the curved section 5.

[0045] A vaporization cooling method for high-temperature flue gas, by applying a vaporization cooling device for high-temperature flue gas, a plurality of heat accumulators are arranged in the vaporization cooling flue 2, and phase-change heat storage materials 30 are arranged in the heat accumulators. When the temperature of the flue gas passing through is lower than that of the phase-change heat storage materials 30, the phase-change heat storage materials 30 in the heat accumulators release heat through phase change, so that when the temperature of the flue gas in the vaporization cooling flue 2 is in a cooling working state, the vaporization cooling flue 2 can be in a heating working state by releasing heat from the phase-change heat storage materials 30 in the heat accumulators, thereby avoiding the alternating thermal stress of the water-cooled wall pipes of the vaporization cooling flue 2, effectively improving the service life of the water-cooled wall pipes of the vaporization cooling flue 2, minimizing the daily maintenance and repair workload of the vaporization cooling flue 2, and ensuring the stability and reliability of the converter 1 steelmaking production. At the same time, a water-cooled high-temperature gate valve 12 is arranged below the oxygen lance 11, and the length of the water-cooled high-temperature gate valve 12 inserted into the vaporization cooling flue 2 is used to further adjust the air volume drawn in. When the temperature in the vaporization cooling flue 2 is in a cooling working state, the suction of cold air can be effectively avoided, thereby reducing the alternating thermal stress of the vaporization cooling flue 2. A hot air inlet with a water-cooled high-temperature valve 13 is arranged at the rear end of the water-cooled high-temperature gate valve 12, further adjusting the flue gas temperature passing through the vaporization cooling flue 2, and further reducing the alternating thermal stress of the vaporization cooling flue 2.

[0046] The aforementioned vaporization cooling device is applied to a converter primary flue gas pure dry method purification treatment system, Figure 5 The overall structure of the converter primary flue gas pure dry method purification treatment system is schematically shown, Figure 5As shown, the primary flue gas pure dry method purification treatment system of the converter comprises a gas burner 18, a high-temperature phase change type heat storage device 19, a quenching type waste heat boiler 21, a dust collector 22, and a flue gas waste heat recovery device 23. The input end of the flue gas waste heat recovery device 23 is in communication with the output end of the dust collector 22. The output end of the flue gas waste heat recovery device 23 is in communication with an axial flow fan 24. The output end of the axial flow fan 24 is in communication with a switching valve 25. One end of the switching valve 25 is in communication with a diffusion chimney 26, and the other end is in communication with a gas cabinet 27. The flue gas output from the converter 1 has a temperature of 1450-1650°C, and the flue gas output from the vaporization cooling flue 2 has a temperature of 800-1000°C.

[0047] The water-cooled three-way high-temperature reversing valve 20 has a first channel in communication with the gas burner 18, a second channel in communication with the input end of the high-temperature phase change type heat storage device 19, and a third channel in communication with the input end of the first water-cooled two-way high-temperature reversing valve 28. The first output end of the first water-cooled two-way high-temperature reversing valve 28 is in communication with the input end of the dust collector 22, and the second output end is in communication with the input end of the quenching type waste heat boiler 21. The output end of the quenching type waste heat boiler 21 is also in communication with the input end of the dust collector 22. The output end of the high-temperature phase change type heat storage device 19 is in communication with the input end of the quenching type waste heat boiler 21 through the second water-cooled two-way high-temperature reversing valve 29.

[0048] It is worth mentioning that pneumatic ash conveying units are arranged below the high-temperature phase change type heat storage device 19, the quenching type waste heat boiler 21, and the dust collector 22, and fluidization devices are provided to completely guide the accumulated ash in the high-temperature phase change type heat storage device 19, the quenching type waste heat boiler 21, and the dust collector 22 into the pneumatic ash conveying units. Emergency injection devices are also provided, and the output end thereof is in communication with the input end of the high-temperature phase change type heat storage device 19, the quenching type waste heat boiler 21, and the dust collector 22. The pneumatic ash conveying units, the fluidization devices, and the emergency injection devices output compressed nitrogen.

[0049] The high-temperature flue gas generated in the converter 1 is input into the input end of the water-cooled three-way high-temperature reversing valve 20 through the vaporization cooling flue 2 connected with the output end of the converter 1. The movable hood and hood skirt 6 are arranged between the vaporization cooling flue 2 and the converter 1, so that the high-temperature flue gas output from the converter 1 can completely flow to the vaporization cooling flue 2 without leakage. The vaporization cooling flue 2 is provided with a flue gas pressure transmitter, a flue gas temperature transmitter and a measuring device for measuring the contents of O2, CO and H2 in the flue gas at the output end of the vaporization cooling flue 2. After being measured by the measuring device, the high-temperature flue gas is selectively input into one of the coal gas burner 18, the high-temperature phase change type heat storage device 19 and the dust collector 22 by the water-cooled three-way high-temperature reversing valve 20, so as to complete the purification process of the flue gas of the converter 1.

[0050] Another input end of the aforementioned coal gas burner 18 can input CO into the coal gas burner 18. The output end is connected with the vaporization cooling flue 2 and is provided with a water-cooled high-temperature resistant plug valve 12 between the output end of the coal gas burner 18 and the connection position of the converter 1 and the movable hood, which is used for regulating the input or output of the high-temperature flue gas.

[0051] The technical scope of the utility model is not limited to the above-mentioned content, and the skilled in the art can make various deformations and modifications to the above-mentioned embodiments without departing from the technical thought of the utility model, and these deformations and modifications should belong to the protection scope of the utility model.

Claims

1. A vaporization cooling device for high-temperature flue gas, comprising a converter (1) and a vaporization cooling flue (2), one end of the vaporization cooling flue (2) being sealed to the output end of the converter (1), the vaporization cooling flue (2) being composed of several water-cooled wall sections (7), characterized in that, At least one heat storage section is fixedly installed in the vaporization cooling flue (2), and phase change heat storage material (30) is arranged in the heat storage section. An oxygen lance (11) is fixedly installed on one end of the vaporization cooling flue (2) close to the converter (1), and a water-cooled high-temperature resistant slide valve (12) is fixedly installed on the vaporization cooling flue (2) below the oxygen lance (11).

2. The vaporization cooling device for high-temperature flue gas according to claim 1, characterized in that, The vaporization cooling flue (2) includes a connecting section (3), a straight section (4) and a curved section (5) connected in sequence. The connecting section (3) and the curved section (5) are both composed of water-cooled wall sections (7). The straight section (4) is composed of several water-cooled wall sections (7). Adjacent water-cooled wall sections (7) are connected and connected by heat storage sections.

3. The vaporization cooling device for high-temperature flue gas according to claim 2, characterized in that, The accumulator section set on the straight section (4) includes a first accumulator section (9) and a second accumulator section (10). The first accumulator section (9) is fixedly set on the straight section (4) close to the connecting section (3). The oxygen blowing nozzle (11) and the water-cooled high-temperature resistant slide valve (12) are fixedly set on the water-cooled wall section (7) between the first accumulator section (9) and the connecting section (3).

4. The vaporization cooling device for high-temperature flue gas according to claim 3, characterized in that, A water-cooled high-temperature valve (13) is fixedly installed on the straight section (4) of the first accumulator section (9) away from the oxygen blowing nozzle (11) and the water-cooled high-temperature resistant slide valve (12) for injecting high-temperature flue gas into the vaporization cooling flue (2).

5. The vaporization cooling device for high-temperature flue gas according to claim 4, characterized in that, The heat storage section includes several smoke-venting cavities opened through the height direction of the heat storage section, and a heat insulation layer (17) is wrapped around the outside of the heat storage section. The flue gas cavity is a cylindrical structure, including a first flue gas cavity (15) fixedly set at the center of the heat accumulator section and multiple rings of second flue gas cavities (16) arranged radially along the heat accumulator section. The interval between each ring of the second flue gas cavity (16) is the same. In each ring of the second flue gas cavity (16), the interval between adjacent second flue gas cavities (16) is the same. The phase change heat storage material (30) is arranged in the gaps of the second flue gas cavity (16).

6. The vaporization cooling device for high-temperature flue gas according to claim 4, characterized in that, The heat storage section includes several smoke-venting cavities opened through the height direction of the heat storage section, and a heat insulation layer (17) is wrapped around the outside of the heat storage section. The flue gas cavity includes a first flue gas cavity (15) located at the center of the heat storage section and multiple rings of second flue gas cavities (16) arranged radially around the first flue gas cavity (15). The first flue gas cavity (15) is a cylindrical channel. The multiple rings of second flue gas cavities (16) are divided based on the center of the first flue gas cavity (15). The central angle of each ring of individual second flue gas cavities (16) is the same. Phase change heat storage material (30) is arranged on the outer edge surface of the second flue gas cavity (16).

7. The vaporization cooling device for high-temperature flue gas according to claim 1, characterized in that, The water-cooled wall section (7) includes a water-cooled wall body and a number of water-cooled pipes (8) arranged based on the water-cooled wall body.

8. The vaporization cooling device for high-temperature flue gas according to claim 2, characterized in that, The curved section (5) is composed of the odd-numbered water-cooled wall sections (7) connected end to end, and a high-temperature resistant spring self-resetting explosion relief device (14) is also provided on the curved section (5).

9. The vaporization cooling device for high-temperature flue gas according to claim 1, characterized in that, The vaporization cooling flue (2) is connected to the output end of the converter (1) by a movable smoke hood and a skirt (6).

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