CN223814979U - Vaporization cooling device for high-temperature flue gas - Google Patents
Vaporization cooling device for high-temperature flue gasInfo
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- CN223814979U CN223814979U CN202520154305.1U CN202520154305U CN223814979U CN 223814979 U CN223814979 U CN 223814979U CN 202520154305 U CN202520154305 U CN 202520154305U CN 223814979 U CN223814979 U CN 223814979U
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Abstract
本实用新型提出了一种高温烟气汽化冷却装置，包括转炉以及汽化冷却烟道，汽化冷却烟道的一端与转炉的输出端连接，汽化冷却烟道由若干段水冷壁段组成，于汽化冷却烟道之中固定设置有至少一段蓄热器段，于蓄热器段之中布设有相变蓄热材料；于汽化冷却烟道贴近转炉一端之上固定设置有吹氧枪口，基于吹氧枪口的下方于汽化冷却烟道之上固定设置有水冷式耐高温插板阀。本实用新型通过在汽化冷却烟道设置有相变蓄热装置并填充有相变蓄热材料，在所通过的烟气温度不足设定温度时，相变蓄热材料发生相变并放出热量，避免水冷壁段因烟气温度差别遭受交变热应力的作用；并设置有水冷式耐高温插板阀，减少过量冷空气吸入，从而进一步减少汽化冷却烟道的交变热应力。
This invention proposes a high-temperature flue gas vaporization cooling device, including a converter and a vaporization cooling flue. One end of the vaporization cooling flue is connected to the output end of the converter. The vaporization cooling flue is composed of several water-cooled wall sections. At least one accumulator section is fixedly installed in the vaporization cooling flue, and phase change heat storage material is arranged in the accumulator section. An oxygen lance nozzle is fixedly installed on the vaporization cooling flue near the converter end. A water-cooled high-temperature resistant gate valve is fixedly installed on the vaporization cooling flue below the oxygen lance nozzle. This invention, by installing a phase change heat storage device and filling it with phase change heat storage material in the vaporization cooling flue, allows the phase change heat storage material to undergo a phase change and release heat when the temperature of the flue gas is lower than the set temperature, thus avoiding the alternating thermal stress on the water-cooled wall sections due to the temperature difference of the flue gas. Furthermore, the water-cooled high-temperature resistant gate valve reduces the intake of excessive cold air, thereby further reducing the alternating thermal stress in the vaporization cooling flue.
Description
Technical Field
The utility model relates to the technical field of energy-saving and environment-friendly equipment, in particular to a vaporization cooling device for high-temperature flue gas.
Background
The converter steelmaking of the main steelmaking process of the iron and steel enterprises generates gas containing carbon monoxide as a main component, a small amount of carbon dioxide and other trace components in the blowing process, and a large amount of ferric oxide, metallic iron particles and other fine particle solid dust are entrained in the gas, so that the pollution to the atmosphere and the workshop environment is serious. Therefore, the technical level of a converter dust removal system is improved, the waste heat of the converter gas and the recovered flue gas is recycled and utilized, and the method has great significance for saving energy and reducing consumption in steelmaking, effectively controlling and reducing the emission of pollutants in the steelmaking atmosphere and reducing environmental pollution.
The flue type waste heat boiler is widely used for recovering heat from high-temperature dust-containing flue gas and coal gas generated in converter steelmaking in steelworks. The converter vaporization cooling flue is directly applied to the production process of converter steelmaking, and is directly participated in the production as a part of the steelmaking process of a steelworks.
The production process characteristics of the converter, namely oxygen blowing smelting, are not continuous, so that the temperature of the flue gas in the vaporization cooling flue is always in a working state of alternately circulating heating and cooling, and the vaporization cooling flue is caused to exchange thermal stress greatly. The vaporization cooling flue has short service life under the action of alternating heat stress, and has great daily maintenance workload and great influence on converter steelmaking production to a certain extent. How to ensure the temperature of the flue gas output from the tail flue of the vaporization cooling flue of the converter to be 800-000 ℃ and ensure the safe and stable operation and longer service life of the vaporization cooling flue is also a technical problem of great concern in the field.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art, and provides a high-temperature flue gas vaporization cooling device which controls the temperature of the flue gas output by a tail flue at 800-1000 ℃ and ensures safe and stable operation and long service life of the vaporization cooling flue.
In order to solve the technical problems, the technical scheme adopted by the utility model is that the high-temperature flue gas vaporization cooling device comprises a converter and a vaporization cooling flue, wherein one end of the vaporization cooling flue is in sealing connection with the output end of the converter, the vaporization cooling flue consists of a plurality of sections of water-cooled wall sections, at least one section of heat accumulator section is fixedly arranged in the vaporization cooling flue, and a phase change heat accumulating material is distributed in the heat accumulator section;
The phase-change heat storage material can be any one of metal and alloy phase-change heat storage materials, molten salt phase-change heat storage materials, carbonate phase-change heat storage materials, metal matrix composite phase-change materials and ceramic matrix composite phase-change materials, wherein the alloy phase-change heat storage materials comprise aluminum silicon alloy phase-change heat storage materials and copper alloy phase-change heat storage materials, the molten salt phase-change heat storage materials comprise fluorine salts and eutectic compounds thereof, such as LiF-NaF-KF eutectic salts, the carbonate phase-change composite materials comprise Li 2CO3-Na2CO3-K2CO3 eutectic salts, the metal matrix composite phase-change materials comprise aluminum matrix/silicon carbide composite phase-change materials, the ceramic matrix composite phase-change materials comprise zirconium oxide/inorganic salt composite phase-change materials, and the ceramic matrix composite phase-change materials can be practically selected according to requirements.
An oxygen blast gun port is fixedly arranged on one end, close to the converter, of the vaporization cooling flue, and a water-cooled high-temperature-resistant gate valve is fixedly arranged on the vaporization cooling flue based on the lower part of the oxygen blast gun port.
Further, the vaporization cooling flue comprises a connecting section, a straight line section and a bending section which are connected in sequence, wherein the connecting section and the bending section are composed of water-cooled wall sections, the straight line section is composed of a plurality of water-cooled wall sections, and adjacent water-cooled wall sections are connected and communicated through a heat accumulator section.
Further, the heat accumulator section arranged on the straight line section comprises a first heat accumulator section and a second heat accumulator section, the first heat accumulator section is close to the connecting section and is fixedly arranged on the straight line section, and the oxygen blowing gun port and the water-cooled high-temperature-resistant gate valve are fixedly arranged on the water-cooled wall section between the first heat accumulator section and the connecting section.
Further, a water-cooled high temperature valve is fixedly arranged on one side of the first heat accumulator section, which is far away from the oxygen lance opening and the water-cooled high temperature resistant gate valve, on the straight line section and is used for injecting high temperature smoke into the vaporization cooling flue.
Further, the heat accumulator section comprises a plurality of smoke through inner cavities which penetrate through the heat accumulator section in the height direction, and a heat preservation and insulation layer is wrapped outside the heat accumulator section;
the smoke passing inner cavities are of cylindrical structures, each smoke passing inner cavity comprises a first smoke passing inner cavity fixedly arranged at the central position of the heat accumulator section and a plurality of circles of second smoke passing inner cavities radially arranged along the heat accumulator section, the intervals between every two circles of second smoke passing inner cavities are the same, the intervals between every two adjacent second smoke passing inner cavities are the same, and the phase change heat accumulating materials are distributed in the gaps of the second smoke passing inner cavities.
Further, the heat accumulator section comprises a plurality of smoke through inner cavities which penetrate through the heat accumulator section in the height direction, and a heat preservation and insulation layer is wrapped outside the heat accumulator section;
The smoke passing inner cavity comprises a first smoke passing inner cavity positioned at the center of the heat accumulator section and a plurality of circles of second smoke passing inner cavities arranged around the first smoke passing inner cavity in the radial direction, the first smoke passing inner cavity is a cylindrical pore canal, the plurality of circles of second smoke passing inner cavities are split based on the center of the first smoke passing inner cavity, the central angles of the single second smoke passing inner cavity in each circle are the same, and phase change heat accumulating materials are distributed on the outer edge surface of the second smoke passing inner cavity.
The heat preservation and insulation layer can be any one of nano microporous heat insulation material, heat preservation and insulation paint, ceramic fiber and composite heat insulation material, and can be actually selected according to the needs.
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.
Further, the bending section is formed by connecting odd sections end to end, and a high-temperature resistant spring self-resetting explosion venting device is further arranged on the bending section.
Further, the vaporization cooling flue is communicated with the output end of the converter through a movable smoke hood and a cover skirt.
Compared with the prior art, the utility model has the beneficial effects that:
1) The device comprises a straight line section of a vaporization cooling flue, a water cooling wall section, a water cooling type heat storage device, a water cooling type high-temperature-resistant gate valve, a water cooling type high-temperature-resistant valve, a water cooling type heat storage device and a water cooling type heat storage device, wherein the straight line section of the vaporization cooling flue is provided with the phase change heat storage device, the phase change heat storage device is filled with the phase change heat storage material, when the temperature of passing smoke is lower than the set temperature, the phase change heat storage material is subjected to phase change and emits heat, and is used for ensuring that the temperature of the passing smoke is maintained within the set temperature range, so that the temperature of the smoke is relatively constant when the smoke passes through the water cooling wall section, the water cooling wall section is prevented from being subjected to the action of alternating heat stress due to the temperature difference of the smoke, the service life of the water cooling wall section of the water cooling wall is effectively prolonged, daily maintenance and maintenance workload of the vaporization cooling flue is furthest reduced, and stable and reliable converter steelmaking production are ensured;
2) And a hot air inlet is further arranged on the straight line section of the vaporization cooling flue and is arranged behind the water-cooled high-temperature-resistant gate valve and used for adjusting the temperature of the flue gas passing through the vaporization cooling flue and further reducing the abrupt thermal stress of the vaporization cooling flue.
Drawings
The disclosure of the present utility model is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 schematically shows the overall structure of a high temperature flue gas evaporative cooling device;
fig. 2 schematically shows a cross-sectional structure of a first embodiment of a regenerator section;
fig. 3 schematically shows a cross-sectional structure of a second embodiment of a regenerator section;
FIG. 4 schematically illustrates the placement of water cooling tubes in a water wall section;
Fig. 5 schematically shows the overall structure of a converter primary flue gas pure dry purification treatment system.
The reference numbers in the drawing are 1-converter, 2-vaporization cooling flue, 3-connecting section, 4-straight line section, 5-bending section, 6-movable smoke hood and cover skirt, 7-water-cooled wall section, 8-water-cooled pipe, 9-first heat accumulator section, 10-second heat accumulator section, 11-oxygen blast muzzle, 12-water-cooled high temperature resistant gate valve, 13-water-cooled high temperature valve, 14-high temperature resistant spring self-resetting explosion venting device, 15-first smoke-passing inner cavity, 16-second smoke-passing inner cavity, 17-heat preservation and insulation layer, 18-gas burner, 19-high temperature phase-change heat accumulating device, 20-water-cooled three-way high temperature reversing valve, 21-quenching type waste heat boiler, 22-dust remover, 23-smoke waste heat recovery device, 24-axial fan, 25-switching valve, 26-emission chimney, 27-gas cabinet, 28-first water-cooling two-way high Wen Huanxiang valve, 29-second water cooling two-way high Wen Huanxiang valve and 30-phase-change heat accumulating material.
Detailed Description
It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.
Fig. 1 schematically shows the overall structure of a high-temperature flue gas vaporization cooling device, and the high-temperature flue gas vaporization cooling device is shown in fig. 1, and comprises a converter 1 and a vaporization cooling flue 2, wherein one end of the vaporization cooling flue 2 is in sealing connection with the output end of the converter 1 through a movable smoke hood and a cover skirt 6, and is used for meeting the requirement of sealing connection between the vaporization cooling flue 2 and the output end of the converter 1 and simultaneously meeting the requirement of adjusting the relative angle position between the vaporization cooling flue 2 and the output end of the converter 1. The vaporization cooling flue 2 is composed of a plurality of sections of water-cooled walls, at least one section of heat accumulator section is fixedly arranged in the vaporization cooling flue 2, and a phase change heat accumulating material 30 is distributed in the heat accumulator section. The process characteristics of the production of the converter 1 cause the oxygen blowing smelting process to be discontinuous, so that the flue gas temperature in the vaporization cooling flue 2 is always in a working state of alternately circulating heating and cooling, and the alternating thermal stress of the vaporization cooling flue 2 is high, and particularly for the water-cooled wall section 7, the service life of the water-cooled wall section is obviously damaged. Through setting the heat accumulator section in the heat accumulator section, for example, the temperature range of the high temperature section set by the phase change heat accumulating material 30 is 1250-1650 ℃, when the temperature of the flue gas passing through the heat accumulator section is lower than the temperature range, the phase change heat accumulating material 30 emits heat when phase change occurs, so that the water wall section 7 is ensured to be in the set temperature range (namely, 350-550 ℃), the effect of alternating heat stress of the water wall pipe of the evaporative cooling flue 2 is avoided, the service life of the water wall pipe of the evaporative cooling flue 2 is effectively prolonged, the daily maintenance and repair workload of the evaporative cooling flue 2 is reduced to the greatest extent, and the stability and reliability of steelmaking production of the converter 1 are ensured.
An oxygen lance 11 is fixedly arranged on one end of the vaporization cooling flue 2 close to the converter 1 (i.e. the inlet end of the vaporization cooling flue 2), and a water-cooled high-temperature-resistant gate valve 12 is fixedly arranged on the vaporization cooling flue 2 based on the lower part of the oxygen lance 11. After the converter 1 finishes oxygen blowing smelting, the length of the valve plate of the calcium water-cooled high-temperature-resistant gate valve 12 extending into the evaporative cooling flue 2 is adjusted, so that the air quantity pumped in by the opening of the evaporative cooling flue 2 is adjusted, the suction of excessive cold air is reduced, the temperature inside the evaporative cooling flue 2 is ensured, and the alternating thermal stress of the evaporative cooling flue 2 is reduced.
The vaporization cooling flue 2 will be specifically described below. The evaporative cooling flue 2 comprises a connecting section 3, a straight-line section 4 and a bending section 5 which are connected in sequence, wherein the connecting section 3 and the bending section 5 are composed of water-cooled wall sections 7, the straight-line section 4 is composed of a plurality of water-cooled wall sections 7, and in the straight-line section 4, adjacent water-cooled wall sections 7 are connected and communicated through by a heat accumulator section. In some embodiments, the heat accumulator section disposed on the straight line section 4 includes a first heat accumulator section 9 and a second heat accumulator section 10, so that the straight line section 4 includes three water-cooled wall sections 7, the first heat accumulator section 9 is fixedly disposed on the straight line section 4 proximate to the connecting section 3, the oxygen lance 11 and the water-cooled high temperature-resistant gate valve 12 are fixedly disposed on the first water-cooled wall section 7, and the water-cooled wall sections 7 are smoothly connected with the connecting section 3. The water-cooled high temperature valve 13 is fixedly arranged on the second water-cooled wall section 7 above the straight line section 4, and the water-cooled high temperature valve 13 is fixedly arranged on one side of the first heat accumulator section 9, which is far away from the oxygen lance 11 and the water-cooled high temperature resistant gate valve 12, and high temperature flue gas can be injected into the straight line section 4 through the water-cooled high temperature valve 13 for adjusting the temperature of the flue gas passing through the vaporization cooling flue 2, so that the alternating thermal stress of the vaporization cooling flue 2 is further reduced.
The regenerator section is described in detail below. The heat accumulator section comprises a plurality of smoke through inner cavities which penetrate through the heat accumulator section in the height direction, a heat preservation and insulation layer 17 is wrapped outside the heat accumulator section, and a plurality of arrangement modes exist inside the heat accumulator section, and the heat accumulator section is specifically as follows:
example 1
As shown in fig. 2, the first smoke passing inner cavity 15 and the second smoke passing inner cavity 16 arranged in the heat accumulator section are both in a cylindrical structure, and include a first smoke passing inner cavity 15 fixedly arranged at the central position of the heat accumulator section and a plurality of circles of second smoke passing inner cavities 16 arranged along the radial direction, the intervals between the second smoke passing inner cavities 16 of each circle are the same, the intervals between the adjacent second smoke passing inner cavities 16 are the same, and the phase change heat accumulating material 30 is arranged in the gaps of the second smoke passing inner cavities 16.
For example, 3 circles of second fume-passing inner cavities 16 are arranged along the radial direction of the heat accumulator section, the second fume-passing inner cavity 16 of the innermost circle (namely, the first circle) consists of 6 second fume-passing inner cavities 16, the second fume-passing inner cavity 16 of the second circle consists of 12 second fume-passing inner cavities 16, the second fume-passing inner cavity 16 of the outermost circle (namely, the third circle) consists of 18 second fume-passing inner cavities 16, and the position of the second fume-passing inner cavity 16 is determined by splitting the heat accumulator based on the central point according to the central angle.
It should be noted that, in some embodiments, a first ventilation cavity 15 disposed at the center of the regenerator section may be different from a plurality of radially disposed second ventilation cavities 16 in diameter.
Example 2
As shown in fig. 3, the heat accumulator section comprises a plurality of smoke passing inner cavities which penetrate through the heat accumulator section in the height direction, a heat preservation and insulation layer 17 is wrapped outside the heat accumulator section, the smoke passing inner cavities comprise a first smoke passing inner cavity 15 positioned in the center of the heat accumulator section and second smoke passing inner cavities 16 arranged around the first smoke passing inner cavity 15 in the radial direction, the first smoke passing inner cavity 15 is a cylindrical pore canal, the plurality of circles of second smoke passing inner cavities 16 are split into a plurality of independent second smoke passing inner cavities 16 based on the center of the first smoke passing inner cavity 15, the central angles of the independent second smoke passing inner cavities 16 are the same, and phase change heat storage materials 30 are distributed on the outer edge surfaces of the second smoke passing inner cavities 16.
For example, after the first smoke passing cavity 15 is arranged in the center of the heat accumulator, 3 circles of circular cavities are arranged in the heat accumulator section based on the outer side of the first smoke passing cavity 15, and then the 3 circles of circular cavities are split according to the central angle of 45 degrees to form a plurality of second smoke passing cavities 16, namely the second smoke passing cavities 16 are arc-shaped in practice, each circle of circular cavities contains 8 second smoke passing cavities 16, the distance between every two adjacent circles of second smoke passing cavities 16 is identical, and the distance between the plurality of circles of second smoke passing cavities 16 along the radial direction can be set according to the practical requirement.
It should be noted that, in the two second fume-passing cavities 16 located at the inner side, there are any 3 second fume-passing cavities 16, the outside of which is not laid with the phase-change heat storage material 30, but in the second fume-passing cavity 16 at the outermost ring, only one second fume-passing cavity 16 is laid with the phase-change heat storage material 30, and the side of the second fume-passing cavity 16 facing the heat accumulator section is provided with the heat preservation and insulation layer 17. The arrangement of the phase-change heat storage material 30 described above may be arranged based on the specific position of the second fume chamber 16, and is not limited to the above-described embodiment.
The water-cooled wall section 7 comprises a water-cooled wall body and a plurality of water-cooled tubes 8 arranged based on the water-cooled wall body, the water-cooled wall body can be of a hollow structure, the water-cooled tubes 8 are fixedly arranged and fixed in the water-cooled wall body, as shown in fig. 4, the water-cooled tubes 8 are fixed in a circumscribed mode, and 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 tubes 8.
The aforesaid bending section 5 is formed by joining the end to end of the water-cooled wall sections 7 of the odd number section, and a high temperature resistant spring self-resetting explosion venting device 14 is further arranged on the bending section 5 for completing the pressure release process of the vaporization cooling flue 2. The aforementioned water wall section 7 forming the curved section 5 has a curved shape structure, and the length of the inner side of the aforementioned water wall section 7 is shorter than that of the outer side, so that the curved structure can be formed after the end-to-end connection of the multi-section water wall section 7, the aforementioned connection mode can be adopted between the connecting section 3 and the straight line section 4, and between the straight line section 4 and the curved section 5, and the high temperature resistant spring self-resetting explosion venting device 14 is fixedly arranged based on the top of the outer side of the curved section 5.
A vaporization cooling method of high temperature flue gas is characterized in that a plurality of heat accumulator sections are arranged in a vaporization cooling flue 2 by using a vaporization cooling device of the high temperature flue gas, a phase change heat storage material 30 is arranged in each heat accumulator section, when the temperature of the passing flue gas is lower than that of the phase change heat storage material 30, the phase change heat storage material 30 generates phase change to release heat, so that when the temperature of the flue gas in the vaporization cooling flue 2 is ensured to be in a cooling working state, the vaporization cooling flue 2 can be in a heating working state by releasing the heat through the phase change heat storage material 30 in the heat accumulation section, the effect of alternating heat stress of a water wall pipe of the vaporization cooling flue 2 is avoided, the service life of the water wall pipe of the vaporization cooling flue 2 is effectively prolonged, daily maintenance and repair workload of the vaporization cooling flue 2 is reduced to the greatest extent, and the stability and reliability of steelmaking production of a converter 1 are ensured. Meanwhile, the water-cooled high-temperature-resistant gate valve 12 is arranged below the oxygen lance port 11, the length of the water-cooled high-temperature-resistant gate valve 12 inserted into the evaporative cooling flue 2 is used for further adjusting the air quantity of the air suction, and when the temperature in the evaporative cooling flue 2 is in a cooling working state, the air suction of cold air can be effectively avoided, so that the alternating thermal stress of the evaporative cooling flue 2 is reduced. And a hot air inlet provided with a water-cooled high temperature valve 13 is arranged at the rear end of the water-cooled high temperature resistant gate valve 12, so that the temperature of the flue gas passing through the vaporization cooling flue 2 is further regulated, and the alternating thermal stress of the vaporization cooling flue 2 is further reduced.
The foregoing vaporization cooling device is applied to a converter primary flue gas pure dry purification treatment system, fig. 5 schematically shows the overall structure of the converter primary flue gas pure dry purification treatment system, as shown in fig. 5, the converter primary flue gas pure dry purification treatment system includes a gas burner 18, a high-temperature phase-change heat storage device 19, a quenching type waste heat boiler 21, a dust remover 22 and a flue gas waste heat recovery device 23, the input end of the flue gas waste heat recovery device 23 is communicated with the output end of the dust remover 22, the output end of the flue gas waste heat recovery device 23 is communicated with an axial flow fan 24, the output end of the axial flow fan 24 is communicated with a switching valve 25, one end of the switching valve 25 is communicated with a diffusing chimney 26, and the other end is communicated with a gas cabinet 27. Wherein the temperature of the flue gas output from the converter 1 is 1450-1650 ℃ and the temperature of the flue gas output from the evaporative cooling flue 2 is 800-1000 ℃.
The high-temperature reversing valve also comprises a water-cooling three-way high-temperature reversing valve 20, wherein a first channel of the input end of the water-cooling three-way high-temperature reversing valve 20 is communicated with the gas burner 18, a second channel of the input end of the water-cooling three-way high-temperature reversing valve 20 is communicated with the input end of the high-temperature phase-change heat storage device 19, a third channel of the water-cooling three-way high-temperature reversing valve is communicated with the input end of the first water-cooling two-way high-Wen Huanxiang valve 28, a first output end of the first water-cooling two-way high-Wen Huanxiang valve 28 is communicated with the input end of the dust remover 22, a second output end of the first water-cooling two-way high-Wen Huanxiang valve is communicated with the input end of the quenching type waste heat boiler 21, and the output end of the quenching type waste heat boiler 21 is also communicated with the input end of the dust remover 22. The output end of the high-temperature phase-change heat storage device 19 is communicated with the input end of the quenching type waste heat boiler 21 through a second water-cooling two-way high Wen Huanxiang valve 29.
It should be noted that pneumatic ash conveying units are disposed below the high-temperature phase-change heat storage device 19, the quenching-type waste heat boiler 21 and the dust remover 22, and a fluidization device is matched to completely guide accumulated ash in the high-temperature phase-change heat storage device 19, the quenching-type waste heat boiler 21 and the dust remover 22 into the pneumatic ash conveying units. And an emergency blowing device is also arranged, and the output end of the emergency blowing device is communicated with the input ends of the high-temperature phase-change heat storage device 19, the quenching type waste heat boiler 21 and the dust remover 22. The pneumatic ash conveying and sending unit, the fluidization device and the emergency blowing device all output compressed nitrogen.
The high temperature flue gas generated in the converter 1 is input into the input end of the water-cooling three-way high temperature reversing valve 20 through the vaporization cooling flue 2 connected with the output end of the converter 1, a movable smoke hood and a cover 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 leaking, a flue gas pressure transmitter, a flue gas temperature transmitter and a measuring device for measuring the contents of O 2, CO and H 2 in the flue gas are arranged at the output end of the vaporization cooling flue 2, and after the measurement by the measuring device, the water-cooling three-way high temperature reversing valve 20 is used for regulating and controlling the high temperature flue gas to be selectively input into one of the gas burner 18, the high temperature phase change type heat storage device 19 and the dust remover 22, so that the purification treatment process of the flue gas of the converter 1 is completed.
CO can be input into the gas burner 18 from the other input end of the gas burner 18, the output end of the gas burner is connected and communicated with the vaporization cooling flue 2, and a water-cooled high-temperature-resistant gate valve 12 is arranged between the output end of the gas burner 18 and the joint of the converter 1 and the movable smoke hood and used for regulating and controlling the input or output of high-temperature smoke.
The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.
Claims (9)
1. The vaporization cooling device for the high-temperature flue gas comprises a converter (1) and a vaporization cooling flue (2), wherein one end of the vaporization cooling flue (2) is in sealing connection with the output end of the converter (1), and the vaporization cooling flue (2) consists of a plurality of sections of water-cooled wall sections (7), and is characterized in that at least one section of heat accumulator section is fixedly arranged in the vaporization cooling flue (2), and a phase change heat accumulating material (30) is distributed in the heat accumulator section;
An oxygen blowing gun port (11) is fixedly arranged on one end, close to the converter (1), of the vaporization cooling flue (2), and a water-cooled high-temperature-resistant gate valve (12) is fixedly arranged on the vaporization cooling flue (2) based on the lower part of the oxygen blowing gun port (11).
2. The evaporative cooling device for high-temperature flue gas according to claim 1, wherein the evaporative cooling flue (2) comprises a connecting section (3), a straight-line section (4) and a bending section (5) which are sequentially connected, the connecting section (3) and the bending section (5) are both composed of water-cooled wall sections (7), the straight-line section (4) is composed of a plurality of water-cooled wall sections (7), and adjacent water-cooled wall sections (7) are connected and communicated through by a heat accumulator section.
3. The high-temperature flue gas vaporization cooling device according to claim 2, wherein the heat accumulator section arranged above the straight-line section (4) comprises a first heat accumulator section (9) and a second heat accumulator section (10), the first heat accumulator section (9) is fixedly arranged above the straight-line section (4) close to the connecting section (3), and the oxygen blowing muzzle (11) and the water-cooled high-temperature-resistant gate valve (12) are fixedly arranged above a water-cooled wall section (7) between the first heat accumulator section (9) and the connecting section (3).
4. A vaporization cooling device for high temperature flue gas according to claim 3, characterized in that a water-cooled high temperature valve (13) is fixedly arranged on the side of the first heat accumulator section (9) away from the oxygen lance opening (11) and the water-cooled high temperature resistant gate valve (12) above the straight line section (4) for injecting high temperature flue gas into the vaporization cooling flue (2).
5. The evaporative cooling device for high-temperature flue gas according to claim 4, wherein the heat accumulator section comprises a plurality of flue gas through cavities which are formed in the height direction of the heat accumulator section, and a heat preservation and insulation layer (17) is wrapped outside the heat accumulator section;
The smoke ventilation inner cavity is of a cylindrical structure and comprises a first smoke ventilation inner cavity (15) fixedly arranged at the central position of the heat accumulator section and a plurality of circles of second smoke ventilation inner cavities (16) radially arranged along the heat accumulator section, the intervals between the second smoke ventilation inner cavities (16) are the same, the intervals between the adjacent second smoke ventilation inner cavities (16) are the same in each circle, and the phase change heat storage material (30) is arranged in the gaps of the second smoke ventilation inner cavities (16).
6. The evaporative cooling device for high-temperature flue gas according to claim 4, wherein the heat accumulator section comprises a plurality of flue gas through cavities which are formed in the height direction of the heat accumulator section, and a heat preservation and insulation layer (17) is wrapped outside the heat accumulator section;
The smoke passing inner cavity comprises a first smoke passing inner cavity (15) positioned at the center of the heat accumulator section and a plurality of circles of second smoke passing inner cavities (16) arranged around the first smoke passing inner cavity (15) along the radial direction, the first smoke passing inner cavity (15) is a cylindrical pore canal, the plurality of circles of second smoke passing inner cavities (16) are split based on the center of the first smoke passing inner cavity (15), the central angles of the single second smoke passing inner cavities (16) of each circle are the same, and phase change heat accumulating materials (30) are distributed on the outer edge surfaces of the second smoke passing inner cavities (16).
7. The evaporative cooling device for high temperature flue gas according to claim 1, wherein the water wall section (7) comprises a water wall body and a number of water cooling tubes (8) arranged based on the water wall body.
8. The evaporative cooling device for high-temperature flue gas according to claim 2, wherein the bent section (5) is formed by connecting odd sections of the water-cooled wall sections (7) end to end, and a high-temperature resistant spring self-resetting explosion venting device (14) is further arranged on the bent section (5).
9. The evaporative cooling device for high temperature flue gas according to claim 1, wherein the evaporative cooling flue (2) is in communication with the output end of the converter (1) in the form of a movable hood and skirt (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202520154305.1U CN223814979U (en) | 2025-01-23 | 2025-01-23 | Vaporization cooling device for high-temperature flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202520154305.1U CN223814979U (en) | 2025-01-23 | 2025-01-23 | Vaporization cooling device for high-temperature flue gas |
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