CN217600758U - Coal injection thermal compensation device capable of saving blast furnace fuel - Google Patents
Coal injection thermal compensation device capable of saving blast furnace fuel Download PDFInfo
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- CN217600758U CN217600758U CN202221611988.1U CN202221611988U CN217600758U CN 217600758 U CN217600758 U CN 217600758U CN 202221611988 U CN202221611988 U CN 202221611988U CN 217600758 U CN217600758 U CN 217600758U
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Abstract
The utility model relates to a blast furnace technical field, and a coal injection thermal compensation device who saves blast furnace fuel is disclosed, including pulverized coal heater and intensification stove, pulverized coal heater's buggy pan feeding mouth and material feeding unit intercommunication, pulverized coal heater's buggy discharge gate is connected with the buggy collector, pulverized coal heater's exhanst gas outlet has air gas heater through outer discharge tube fixed mounting of high temperature flue gas, the blast furnace gas entry of intensification stove communicates with each other and this pipeline runs through air gas heater through pipeline and blast furnace gas interface, the air entry of intensification stove links to each other and this pipeline runs through air gas heater through pipeline and outdoor air interface. The utility model discloses in, it is low to have solved buggy combustion efficiency, and high coal injection ratio can make the descending range of furnace pot temperature bigger, and the buggy preheats and plays fine compensation effect to furnace pot calorific loss, has improved the combustion efficiency of buggy, has increased the jetting buggy volume, has reduced ironmaking coke consumption, problem that the ironmaking is with high costs.
Description
Technical Field
The utility model relates to a blast furnace technical field especially relates to a save coal injection heat compensation arrangement of blast furnace fuel.
Background
The blast furnace coal injection is the most effective measure for saving coke, increasing yield and improving smelting process of iron and steel enterprises, and all countries in the world actively develop and apply blast furnace coal injection technology, but with the increase of injection quantity, after the coal injection ratio is increased to a certain limit, the coke ratio reduction amplitude can be greatly reduced, and the main reason is that the injected coal powder can not be completely combusted in front of a tuyere, unburned coal powder can be brought out of a convolution area by rising coal gas and adhered to slag when a slag forming zone is formed, the viscosity of primary slag formation is added, the air permeability of a stock column is deteriorated, the blast furnace is smooth and unfavorable, and even part of carbon particles are brought out of the furnace to be wasted. Scientific research and production practice show that 4 factors exist for further improving the coal injection quantity: the burning rate of the coal powder in front of the tuyere, the thermal state of the hearth, the motion resistance of the coal gas flow and the coal coke replacement ratio. Wherein the burning rate of the pulverized coal in front of the tuyere is a main factor for limiting the injection amount at present. Therefore, how to increase the combustion rate of the pulverized coal in front of the tuyere becomes a key for further increasing the coal injection ratio.
The temperature of the hearth can be reduced by blowing coal powder into the blast furnace, the temperature of the hearth can be reduced by 15-20 ℃ by blowing per l0kg/t of anthracite, the temperature of the hearth can be reduced by 20-25 ℃ by blowing per l0kg/t of bituminous coal, the temperature of the hearth can be reduced by more than 150-250 ℃ by blowing coal powder with the coal powder amount larger than l00kg/t, the temperature of the hearth can be reduced by a large extent by using a high coal injection ratio, and the heat loss of the hearth can be well compensated by preheating the coal powder. When the preheating temperature of the coal dust is increased by 50 ℃, the combustion rate of the coal dust in the convolution area is averagely increased by 2 percent.
In order to improve the combustion rate of pulverized coal, reduce the iron-making cost of iron and steel enterprises, reduce energy consumption, reduce the emission of greenhouse gases, increase the amount of pulverized coal injection and reduce coke consumption, a new coal injection thermal compensation device is urgently needed.
Therefore, a coal injection thermal compensation device for saving the fuel of the blast furnace is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve and improve buggy combustion rate, reduce the iron-making cost of iron and steel enterprise, reduce the energy consumption, reduce greenhouse gas's emission, still can increase buggy jetting volume, reduce the technical problem of coke consumption, provide a coal injection heat compensation arrangement who saves blast furnace fuel.
In order to achieve the above object, the utility model discloses a following technical scheme, a coal injection thermal compensation device who saves blast furnace fuel, including pulverized coal heater and intensification stove, pulverized coal feed inlet and material feeding unit intercommunication of pulverized coal heater, pulverized coal heater's buggy discharge gate is connected with the pulverized coal collector, and pulverized coal collector's output passes through pipe connection blast furnace front pulverized coal distributor, and blast furnace front pulverized coal distributor's output fixed mounting has blast furnace front pulverized coal distribution branch pipe, and blast furnace front pulverized coal distribution branch pipe keeps away from the detachable blast furnace front pulverized coal distributor's of one end and installs blast furnace pulverized coal spray gun, pulverized coal heater's exhanst gas outlet passes through circulating fan and links to each other with the flue gas inlet of intensification stove, the exhanst gas outlet of intensification stove passes through the pipeline and links to each other with pulverized coal heater's flue gas inlet, the high temperature flue gas outward discharge pipeline of fixedly connected with high temperature flue gas outward is arranged the pipeline and is kept away from pulverized coal heater's one end fixed mounting has air gas heater, the blast furnace coal gas inlet of intensification stove communicates with the blast furnace through pipeline and runs through air gas heater and contacts with the inside flue gas heater through the air gas heater through the pipeline, the air heater through the air heater and heats up the air heater through the pipeline.
In order to solve the problem that the combustion degree of the heating furnace cannot be adjusted, a gas adjusting valve is fixedly arranged on a pipeline between the heating furnace and a blast furnace gas interface.
In order to solve the problem that high-temperature flue gas flows back to the outside, a combustion-supporting fan is fixedly arranged on a pipeline between the heating furnace and the outdoor air interface.
In order to solve the feeding problem, the feeding device comprises a pulverized coal injection tank, a pulverized coal air mixer and a first pulverized coal distributor, wherein a pulverized coal input end of the pulverized coal air mixer is communicated with an output end of the pulverized coal injection tank, an air input end of the pulverized coal air mixer is connected with a compressed air interface, an output end of the pulverized coal air mixer is connected with the first pulverized coal distributor, and an output end of the first pulverized coal distributor is communicated with a pulverized coal heater through a pipeline.
In order to solve the safety problem of a pulverized coal injection system, a pulverized coal input end of the pulverized coal heater is provided with a flexible connecting pipe which is a rubber hose.
In order to solve the problem that the normal operation of the blast furnace can still be guaranteed when a fault occurs, an original injection pipeline is fixedly arranged between the output end of the pulverized coal air mixer and the input end of the pulverized coal distributor in front of the blast furnace.
In order to further utilize the heat of the discharged high-temperature flue gas, the flue gas output end of the air gas heater is connected with the coal mill through a pipeline.
In order to protect the flexible connection pipe, stainless steel bars are uniformly welded around the outer wall surface of the flexible connection pipe between the flange plates at two ends of the flexible connection pipe.
Advantageous effects
The utility model provides a coal injection thermal compensation device for saving blast furnace fuel. The method has the following beneficial effects:
(1) The utility model discloses set up the blast furnace coal powder heater in blast furnace coal powder injection device, it is low to have solved and use jetting buggy temperature, and buggy combustion efficiency is low, and high coal injection ratio can make the descending extent of furnace pot temperature bigger, and the buggy preheats and plays fine compensating action to furnace pot calorific loss, has improved the combustion efficiency of buggy, has increased jetting buggy volume, has reduced ironmaking coke consumption, problem that the ironmaking is with high costs.
(2) The utility model discloses set up the rubber tube in the import of blast furnace coal powder heater buggy, when hot-blast refluence income pipeline, the rubber tube is blown promptly, and hot-blast unlikely tumble flow in buggy jetting jar guarantees jetting coal dust system's safety.
(3) The utility model is provided with a pulverized coal heater bypass, and switches to the original operation mode when the blast furnace coal injection thermal compensation device fails.
(4) The utility model discloses be equipped with blast furnace gas governing valve, can adjust buggy preheating temperature as required.
(5) The utility model is provided with an air-gas heater, the heat of the high-temperature smoke can be utilized to improve the temperature of the blast furnace gas and the combustion air of the smoke heating furnace, and the discharged smoke is used for drying the coal powder in the coal mill.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other implementation drawings may be derived by those of ordinary skill in the art without inventive effort from the drawings provided.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment still falls within the range which can be covered by the technical content disclosed by the present invention without affecting the function and the achievable purpose of the present invention.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rubber hose connection structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of the air gas heater of the present invention;
fig. 4 is a schematic view of a connection structure of a second rubber tube according to an embodiment of the present invention.
Illustration of the drawings:
1. a pulverized coal heater; 2. heating the furnace; 3. a circulating fan; 4. a first pulverized coal distributor; 5. a pulverized coal collector; 6. a high-temperature flue gas discharge pipeline; 7. a flexible connection pipe; 8. an air gas heater; 9. a combustion fan; 10. a gas regulating valve; 11. a pulverized coal injection tank; 12. a pulverized coal air mixer; 13. an original blowing pipeline; 14. a blast furnace front pulverized coal distributor; 15. a blast furnace front pulverized coal distribution branch pipe; 16. a blast furnace pulverized coal spray gun; 17. a coal mill; 18. a blast furnace gas interface; 19. an outdoor air interface; 20. the compressed air interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows: a coal injection thermal compensation device for saving blast furnace fuel is disclosed, as shown in figures 1-3, and comprises a coal powder heater 1 and a heating furnace 2, wherein the coal powder heater 1 is provided with a coal powder inlet/outlet and a flue gas inlet/outlet, the heating furnace 2 is provided with a flue gas inlet/outlet, a blast furnace coal gas inlet and an air inlet, a coal powder feeding port of the coal powder heater 1 is communicated with a feeding device, a coal powder discharging port of the coal powder heater 1 is connected with a coal powder collector 5, the output end of the coal powder collector 5 is connected with a blast furnace front coal powder distributor 14 through a pipeline, the output end of the blast furnace front coal powder distributor 14 is fixedly provided with a blast furnace front coal powder distribution branch pipe 15, and one end of the blast furnace front coal powder distribution branch pipe 15, which is far away from the blast furnace front coal powder distributor 14, is detachably provided with a blast furnace coal powder injection gun 16;
the flue gas outlet of the pulverized coal heater 1 is connected with the flue gas inlet of the warming furnace 2 through the circulating fan 3, the flue gas outlet of the warming furnace 2 is connected with the flue gas inlet of the pulverized coal heater 1 through a pipeline, and the circulating fan 3 can enable high-temperature flue gas generated by combustion in the warming furnace 2 to circulate between the pulverized coal heater 1 and the warming furnace 2, so that pulverized coal in the pulverized coal heater 1 is heated, and the combustion efficiency of the pulverized coal is improved;
a high-temperature flue gas discharge pipeline 6 is fixedly connected between a flue gas outlet of the pulverized coal heater 1 and the circulating fan 3, an air gas heater 8 is fixedly installed at one end, far away from the pulverized coal heater 1, of the high-temperature flue gas discharge pipeline 6, a blast furnace gas inlet of the warming furnace 2 is communicated with a blast furnace gas connector 18 through a pipeline, the pipeline penetrates through the air gas heater 8 and is contacted with flue gas inside the air gas heater 8, an air inlet of the warming furnace 2 is connected with an outdoor air connector 19 through a pipeline, the pipeline penetrates through the air gas heater 8 and is contacted with the flue gas inside the air gas heater 8, and an output end of the air gas heater 8 is connected with a coal mill 17 through a pipeline, so that the high-temperature flue gas after pulverized coal is heated inside the pulverized coal heater 1 further preheats the blast furnace gas through the air gas heater 8, and the combustion efficiency of the warming furnace 2 is improved.
The gas regulating valve 10 is fixedly arranged on a pipeline between the warming furnace 2 and the blast furnace gas interface 18, and the blast furnace gas can be controlled to enter the warming furnace 2 through the gas regulating valve 10, so that the combustion degree of the hearth of the warming furnace 2 can be controlled as required, and the preheating temperature of the pulverized coal is further regulated.
And a combustion-supporting fan 9 is fixedly arranged on a pipeline between the warming furnace 2 and the outdoor air interface 19, and is used for pressurizing combustion-supporting air so as to prevent smoke in the warming furnace 2 from flowing back to the outside.
The feeding device comprises a pulverized coal injection tank 11, a pulverized coal air mixer 12 and a first pulverized coal distributor 4, wherein a pulverized coal input end of the pulverized coal air mixer 12 is communicated with an output end of the pulverized coal injection tank 11, an air input end of the pulverized coal air mixer 12 is connected with a compressed air interface 20, an output end of the pulverized coal air mixer 12 is connected with the first pulverized coal distributor 4, an output end of the first pulverized coal distributor 4 is communicated with a pulverized coal heater 1 through a pipeline, and pulverized coal in the pulverized coal injection tank 11 is input into the pulverized coal heater 1 through the first pulverized coal distributor 4 by pressurization of the pulverized coal air mixer 12.
The pulverized coal injection system is characterized in that a soft connecting pipe 7 is arranged at the pulverized coal input end of the pulverized coal heater 1, the soft connecting pipe 7 is a rubber hose, when hot air in the pulverized coal heater 1 flows backwards to the first pulverized coal distributor 4, the rubber hose is blown, the hot air cannot flow backwards into the pulverized coal injection tank 11, and the safety of the pulverized coal injection system is guaranteed.
An original injection pipeline 13 is fixedly installed between the output end of the pulverized coal air mixer 12 and the input end of the blast furnace front pulverized coal distributor 14, so that when the pulverized coal heater 1 breaks down, pulverized coal is directly conveyed into the blast furnace front pulverized coal distributor 14 through the original injection pipeline 13, normal operation of the blast furnace can be still guaranteed when the pulverized coal heater 1 breaks down, and a thermal compensation system can be conveniently overhauled.
The flue gas output end of the air coal gas heater 8 is connected with the interior of the coal mill 17 through a pipeline, so that high-temperature flue gas discharged by the air coal gas heater 8 can dry coal powder in the coal mill 17.
The working principle of the first embodiment is as follows: 1280m in steelworks 3 The thermal compensation device for the blast furnace coal powder distribution and blowing takes the project as an example, the coal powder in the coal powder blowing tank 11 is pressurized by the coal powder air mixer 12 and sent to the first coal powder distributor 4 in front of the coal powder heater 1, and the coal powderThe coal dust is divided into a plurality of coal dust pipelines of DN20 by a first coal dust distributor 4, enters a coal dust heater 1, is collected by a coal dust collector 5, enters a newly-built blast furnace front coal dust distributor 14, and is divided into a plurality of coal dust pipelines of DN20 by the blast furnace front coal dust distributor 14 and then is connected with a blast furnace coal dust spray gun 16 to be sent to the blast furnace for combustion.
A part of high-temperature flue gas in the coal powder heater 1 enters the heating furnace 2 again through the circulating fan 3 to be heated, a part of high-temperature flue gas enters the air gas heater 8 to heat and preheat blast furnace gas and combustion-supporting air, the preheating of the blast furnace gas improves the combustion efficiency of a hearth in the heating furnace 2, the combustion-supporting air enters the heating furnace 2 to be combusted and then is mixed with the high-temperature flue gas discharged by the coal powder heater 1, the temperature of the circulating flue gas is increased from 300 ℃ to 450 ℃, the mixed high-temperature flue gas with the increased temperature enters the coal powder heater 1 again to be used for heating coal powder in the coal powder heater 1, and the temperature of the coal powder is increased from about 80 ℃ to 300 ℃.
Example two: as shown in fig. 1, fig. 3 and fig. 4, the pulverized coal injection device comprises a pulverized coal heater 1 and a heating furnace 2, wherein the pulverized coal heater 1 is provided with a pulverized coal inlet/outlet and a flue gas inlet/outlet, the heating furnace 2 is provided with a flue gas inlet/outlet, a blast furnace coal gas inlet and an air inlet, a pulverized coal feeding port of the pulverized coal heater 1 is communicated with a feeding device, a pulverized coal discharging port of the pulverized coal heater 1 is connected with a pulverized coal collector 5, an output end of the pulverized coal collector 5 is connected with a blast furnace front pulverized coal distributor 14 through a pipeline, a blast furnace front pulverized coal distribution branch pipe 15 is fixedly installed at an output end of the blast furnace front pulverized coal distributor 14, and a blast furnace coal injection gun 16 is detachably installed at one end of the blast furnace front pulverized coal distribution branch pipe 15, which is far away from the blast furnace front pulverized coal distributor 14.
The feeding device comprises a pulverized coal injection tank 11, a pulverized coal air mixer 12 and a first pulverized coal distributor 4, wherein a pulverized coal input end of the pulverized coal air mixer 12 is communicated with an output end of the pulverized coal injection tank 11, an air input end of the pulverized coal air mixer 12 is connected with a compressed air interface 20, an output end of the pulverized coal air mixer 12 is connected with the first pulverized coal distributor 4, an output end of the first pulverized coal distributor 4 is communicated with a pulverized coal heater 1 through a pipeline, and pulverized coal in the pulverized coal injection tank 11 is input into the pulverized coal heater 1 through the first pulverized coal distributor 4 by pressurization of the pulverized coal air mixer 12.
A flexible connecting pipe 7 is arranged between the coal powder input end of the coal powder heater 1 and the first coal powder distributor 4, the flexible connecting pipe 7 is a rubber hose, and stainless steel bars are uniformly welded around the outer wall surface of the flexible connecting pipe 7 between flanges at two ends of the flexible connecting pipe 7, so that the flexible connecting pipe 7 is protected, and the coal injection thermal compensation device is prevented from being broken down due to external force of the flexible connecting pipe 7.
The second embodiment has the following working principle: through the outside welding stainless steel strip at hose connection pipe 7, when making hose connection pipe 7 have the hot melt effect, avoid hose connection pipe 7 to receive external force to influence the fracture to coal injection thermal compensation device breaks down.
The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The standard parts used in the present application document can be purchased from the market, and can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts the conventional means matured in the prior art, the machines, the parts and the equipment adopt the conventional types in the prior art, the circuit connection adopts the conventional connection mode in the prior art, no specific description is provided here, meanwhile, the electric elements appearing in the specification are electrically connected with the external main controller and the mains supply, the peripheral controller mentioned in the specification can play a control role for the electric elements mentioned in the specification, and the peripheral controller is the conventional known equipment.
Claims (8)
1. The utility model provides a save coal injection heat compensation arrangement of blast furnace fuel, includes pulverized coal heater (1) and intensification stove (2), its characterized in that: the coal dust heating device is characterized in that a coal dust inlet of the coal dust heater (1) is communicated with a feeding device, a coal dust outlet of the coal dust heater (1) is connected with a coal dust collector (5), an output end of the coal dust collector (5) is connected with a blast furnace front coal dust distributor (14) through a pipeline, a blast furnace front coal dust distribution branch pipe (15) is fixedly installed at an output end of the blast furnace front coal dust distributor (14), one end, far away from the blast furnace front coal dust distributor (14), of the blast furnace front coal dust distribution branch pipe (15) is fixedly installed with a blast furnace coal dust spray gun (16), a flue gas outlet of the coal dust heater (1) is connected with a flue gas inlet of the warming furnace (2) through a circulating fan (3), a flue gas outlet of the warming furnace (2) is connected with a flue gas inlet of the coal dust heater (1) through a pipeline, a high-temperature flue gas exhaust pipeline (6) is fixedly connected between the flue gas outlet of the coal dust heater (1) and the circulating fan (3), one end, far away from the coal dust heater (1) of the high-temperature flue gas pipeline (6) is fixedly installed with an air exhaust pipeline (8), the blast furnace gas inlet of the warming furnace (2) is connected with an air heater (8) through an air inlet of the air heater (8) and an air heater (19), and an air heater (8) through an air inlet of the air heater (8), and an air heater (8) and a flue gas inlet of the air heater (2) and a flue gas heater (2) are connected with an air inlet of the air heater (18) through an air inlet of the air heater (2) (8) internal flue gas contact.
2. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 1, wherein: and a gas regulating valve (10) is fixedly arranged on a pipeline between the heating furnace (2) and the blast furnace gas interface (18).
3. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 1, wherein: and a combustion-supporting fan (9) is fixedly arranged on a pipeline between the heating furnace (2) and the outdoor air interface (19).
4. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 1, wherein: the feeding device comprises a pulverized coal injection tank (11), a pulverized coal air mixer (12) and a first pulverized coal distributor (4), wherein a pulverized coal input end of the pulverized coal air mixer (12) is communicated with an output end of the pulverized coal injection tank (11), an air input end of the pulverized coal air mixer (12) is connected with a compressed air interface (20), an output end of the pulverized coal air mixer (12) is connected with the first pulverized coal distributor (4), and an output end of the first pulverized coal distributor (4) is communicated with a pulverized coal heater (1) through a pipeline.
5. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 4, wherein: the pulverized coal heater is characterized in that a pulverized coal input end of the pulverized coal heater (1) is provided with a flexible connecting pipe (7), and the flexible connecting pipe (7) is a rubber hose.
6. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 4, wherein: an original blowing pipeline (13) is fixedly arranged between the output end of the pulverized coal air mixer (12) and the input end of the pulverized coal distributor (14) in front of the blast furnace.
7. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 1, wherein: and the smoke output end of the air coal gas heater (8) is connected with a coal mill (17) through a pipeline.
8. The coal injection thermal compensation device for saving the blast furnace fuel according to claim 5, wherein: stainless steel strips are uniformly welded around the outer wall surface of the flexible connecting pipe (7) between the flange plates at the two ends of the flexible connecting pipe (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221611988.1U CN217600758U (en) | 2022-06-27 | 2022-06-27 | Coal injection thermal compensation device capable of saving blast furnace fuel |
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| CN202221611988.1U CN217600758U (en) | 2022-06-27 | 2022-06-27 | Coal injection thermal compensation device capable of saving blast furnace fuel |
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