CN217210227U - Sintering fuel screening system - Google Patents
Sintering fuel screening system Download PDFInfo
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- CN217210227U CN217210227U CN202123331826.0U CN202123331826U CN217210227U CN 217210227 U CN217210227 U CN 217210227U CN 202123331826 U CN202123331826 U CN 202123331826U CN 217210227 U CN217210227 U CN 217210227U
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Abstract
A sintered fuel screening system characterized by: the system comprises a drying device (A) and a screening device (1); the drying device (A) comprises a spiral conveying device (2) and a heat exchange device (3); the spiral conveying device (2) is provided with a fuel inlet (201) and a fuel outlet; the fuel outlet of the spiral conveying device (2) is connected to the feeding hole (101) of the screening device (1); the heat exchange device (3) is arranged around the periphery of the spiral conveying device (2); the heat exchange device (3) is provided with a heat medium inlet (301) and a heat medium outlet (302). The utility model discloses can require production preparation sintering fuel according to the granularity of setting for, solve the problem that the fuel granularity influences sintering deposit finished product quality and energy efficiency too carefully, improve the yield of sintering deposit, reduce sintering process's solid burnup, reduce carbon emission.
Description
Technical Field
The utility model relates to a technique of control sintering fuel granularity, concretely relates to sintering fuel screening system belongs to sintering production technical field.
Background
The solid fuel is one of the main fuels adopted in the metallurgical sintering process and is also a main source of carbon emission in the ferrous metallurgy industry, and the particle size distribution of the solid fuel can generate great influence on the performance of sintered ores and the energy consumption of solids. When the fuel particle size is too small, on one hand, the combustion speed is higher than the heat transfer speed and the reaction speed, the combustion zone becomes thin, and the sufficient liquid phase cannot be formed in time, so that the strength of the sinter is influenced, and the yield is reduced; on the other hand, the combustion reaction may be prone to the Boolean reaction (C + CO) 2 2CO), the combustion ratio increases, the combustion heat value loss increases, and the fuel utilization rate decreases; at the same time, the fine particle fuel may be entrained by the gas stream, which results in increased solid burn-up and CO addition 2 The amount of discharge of (c). The combination of the practical application condition of the engineering site and the analysis result of related documents shows that the strict control of the solid fuel granularity within the range of 0.5-3 mm (or 1-3 mm) has obvious effects on energy conservation and consumption reduction in sintering.
The anthracite is one of the commonly used solid fuels, and experimental measurement on the particle size distribution of the anthracite used for sintering shows that the coal content of the fuel with the particle size fraction of <0.5mm can even reach 20-30%. The main reason is that the existing sintering fuel supply mode mainly adopts one-stage or two-stage crushing process, the particle size of the fuel is reduced to below 3mm after the fuel is crushed by four rollers, the fuel directly enters a sintering system, and a light and fine particle screening device is lacked, so that the condition that the particle size of the fuel is too small easily occurs, and the quality of sintering ore and the utilization rate of the fuel are influenced. However, because the moisture content of the sintered fuel reaches 7% -10%, the proportion of the fine-fraction fuel is high, the cohesive force between particles is large, the blockage phenomenon is easy to occur when the existing screening device is used for screening, the screening difficulty is too large, the screening efficiency is too low, and a good screening process does not occur at present.
Therefore, under the background of "double carbon", in order to reduce solid energy consumption from a fuel supply mode and promote low carbon development of the sintering industry, a screening scheme suitable for sintering fuel with high humidity and small particle size needs to be provided, and the proportion of the sintering fuel in the particle size fraction of less than 0.5mm (or 1mm) is strictly controlled.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model discloses combine sintering fuel's self characteristic, provide a screening system suitable for sintering fuel. The utility model discloses in, sintered fuel screening system mainly includes drying device and screening plant, and wherein drying device includes screw conveyer again, breaks up device and heat transfer device. After the crushing of the sintering fuel is finished, the sintering fuel is conveyed to a spiral conveying device to be subjected to primary heat exchange drying with a heat medium in a heat exchange device, and then the sintering fuel enters a scattering device to be subjected to secondary heat exchange drying, so that the moisture content in the sintering fuel is reduced, and the screening effect of the sintering fuel is improved; simultaneously, break up the setting of device and can also avoid sintering fuel drying process's reunion phenomenon to cause the influence to the screening to further improve sintering fuel's screening effect. And (4) screening the sintered fuel subjected to heat exchange and drying in a screening device to separate fine-grained fuel in the sintered fuel, so that the sintered fuel meeting the requirement of sintering granularity is obtained. The utility model discloses can require production preparation sintering fuel according to the granularity of setting for, solve the problem that the fuel granularity influences sintering deposit finished product quality and energy utilization efficiency too carefully, improve the yield of sintering deposit, reduce sintering process's solid burnup, reduce the carbon and discharge.
According to a first embodiment of the present invention, a sintered fuel screening system is provided.
A sintered fuel screening system includes a drying device and a screening device. The drying device comprises a spiral conveying device and a heat exchange device. The spiral conveying device is provided with a fuel inlet and a fuel outlet. The fuel outlet of the screw conveyer is connected to the feed inlet of the screening device. The heat exchange device is arranged around the periphery of the spiral conveying device. The heat exchange device is provided with a heat medium inlet and a heat medium outlet.
The utility model discloses in, drying device still includes breaks up the device. The feed end of the scattering device is connected with the discharge end of the spiral conveying device, and the scattering device is communicated with the spiral conveying device. The heat exchange device is arranged around the periphery of the spiral conveying device and the scattering device. The discharge opening of the scattering device is connected to the feed opening of the screening device.
Preferably, the discharge end of the scattering device is provided with N 2 And (4) an inlet. The feed end of the spiral conveying device is provided with N 2 And (7) an outlet. Preferably, the system further comprises an oxygen removal device. From N 2 The first pipeline led out from the outlet is connected to the air inlet of the oxygen removing device. The air outlet of the oxygen removing device is connected to N through a second pipeline 2 And (6) an inlet.
The utility model discloses in, screw conveyor includes first axis of rotation, screw conveying blade, a drive arrangement. Wherein, first axis of rotation setting is at screw conveyor's axis position. The spiral conveying blade is arranged on the first rotating shaft and is arranged around the periphery of the first rotating shaft. The first driving device is connected with the first rotating shaft. The first driving device drives the first rotating shaft to rotate and drives the spiral conveying blade to rotate.
The utility model discloses in, break up the device and include the second axis of rotation, hit paddle, second drive arrangement. Wherein, the second axis of rotation sets up the axis position in breaing up the device. The beating paddle is arranged on the second rotating shaft. Preferably, the number of the striking blades is plural. The plurality of striking blades are evenly distributed around the periphery of the second rotational axis. The second driving device is connected with the second rotating shaft. And the second driving device drives the second rotating shaft to rotate and drives the beating paddle to rotate.
Preferably, a flow guiding spiral plate is arranged in the heat exchange device. Preferably, the number of the flow guiding spiral plates is multiple. Along the trend of sintering fuel in drying device, a plurality of water conservancy diversion spiral plates evenly arrange in proper order.
Preferably, the heat medium inlet of the heat exchange device is arranged on one side of the heat exchange device close to the feeding end of the spiral conveying device. And a heat medium outlet of the heat exchange device is arranged on one side of the heat exchange device close to the discharge end of the scattering device.
The utility model discloses in, be equipped with feed inlet and discharge gate on the screening plant. The feed inlet is located one side at the top of the screening device, and the discharge outlet is located the other side at the bottom of the screening device.
A clapboard is arranged in the screening device. The partition divides the interior space of the screening device into an upper screening area and a lower screening area. An upper screen is arranged in the upper screening area, and a lower screen is arranged in the lower screening area. And the baffle divides the feed inlet of screening plant into first feed inlet and second feed inlet. The first feed opening communicates with the upper screening area. The second feed inlet communicates with the lower screening zone.
The discharge hole comprises a first coarse material outlet, a first fine material outlet, a second coarse material outlet and a second fine material outlet. The upper screen and the side wall of the screening device form a first coarse material outlet, and a first fine material outlet is formed between the upper screen and the partition plate. A second coarse material outlet is formed between the lower screen and the partition plate, and meanwhile, a second fine material outlet is formed between the lower screen and the side wall of the screening device.
The utility model discloses in, first thick material export is linked together with the export of the thick material of second, constitutes the export of thick material. The first fine material outlet is communicated with the second fine material outlet to form a fine material outlet.
Preferably, the mesh size of the upper screen and/or the lower screen is 1mm or less, preferably 0.5 to 1 mm.
Preferably, the screening device further comprises a vibration motor, a bracket and a damping spring. Vibrating motor is connected with screening plant's casing, and vibrating motor provides the vibration source for screening plant's screening. The support is arranged at the lower part of the screening device shell and used for supporting the screening device. And a damping spring is also arranged between the bracket and the screening device shell.
In the present invention, the system further comprises a sintering and batching system. And a coarse material outlet of the screening device is connected to a sintering batching system.
In the utility model, the system also comprises a blast furnace. And a fine material outlet of the screening device is connected to the blast furnace.
The system of the present invention further comprises a fuel delivery device and a buffer bin disposed upstream of the screw delivery device. The discharging end of the fuel conveying device is connected with the feeding hole of the buffer bin, and the discharging hole of the buffer bin is connected with the fuel inlet of the spiral conveying device. Preferably, the fuel delivery device is a belt conveyor.
According to a second embodiment of the present invention, a sintered fuel sizing process is provided.
A sintered fuel sizing process or a sintered fuel sizing process using the system of the first embodiment, the process comprising the steps of:
1) primary drying: and conveying the sintering fuel to be treated to a spiral conveying device of the drying device, and introducing a heat medium into the heat exchange device. And the sintering fuel entering the spiral conveying device and the heat medium in the heat exchange device are subjected to heat exchange drying to complete primary drying.
2) Secondary drying: and directly feeding the primary dried sintering fuel into a scattering device of the drying device, and scattering the primary dried sintering fuel by the scattering device. Meanwhile, the sintered fuel after the primary drying continuously exchanges heat with a heat medium in a heat exchange device for drying, and secondary drying is completed.
3) And (3) screening the upper part and the lower part: and the sintered fuel after secondary drying enters an upper screening area and a lower screening area of the screening device through the first feed inlet and the second feed inlet respectively. And starting the vibrating motor, and simultaneously screening the upper screening area and the lower screening area. After the screening is finished, oversize coarse-grained fuel meeting the sintering granularity requirement is discharged from a coarse material outlet of the screening device, and undersize fine-grained fuel is discharged from a fine material outlet of the screening device.
Preferably, in the drying process of the step 1) and the step 2), N is introduced into the drying device 2 The method comprises the following steps: by breaking up N on the device 2 N is introduced into the drying device from the inlet 2 After passing through the scattering device and the screw conveyer, the gas in the drying device is changed into oxygen-containing N carrying high-temperature water vapor generated by sintering fuel 2 Containing oxygen N 2 From N on the screw conveyer 2 And discharging from an outlet.
Preferably, from N 2 A portion of the outlet bleed containing oxygen N 2 After the deoxidization treatment is carried out by the deoxidization device, the mixture circularly enters a drying device, and the other part of the mixture contains oxygen N 2 Then for N before entering the drying device 2 Carrying out isolated preheating, wherein the preheated oxygen-containing N 2 Then enters into the deoxidizing device to be deoxidized and recycled.
In the present invention, in step 2), the moisture content of the sintered fuel after the secondary drying is less than 7%, preferably less than 6%, and more preferably less than 5%.
In the utility model, the heat medium is the waste gas of the sintering circular cooler or the waste gas of the blast furnace hot blast stove. The temperature of the heat medium is 200-500 ℃, and preferably 300-400 ℃.
In the present invention, the process further comprises the following steps:
4) and conveying the oversize coarse fuel which meets the sintering granularity requirement and is discharged from the coarse material outlet to a sintering batching system.
5) Undersize fine fuel discharged from the fine feed outlet is delivered to the blast furnace.
In the prior art, after the sintered fuel is crushed by four rollers, the particle size is reduced to be less than 3mm, the sintered fuel directly enters a sintering system, and the condition that the particle size of the fuel is too small easily occurs due to the lack of a light fine particle screening device, so that the quality of sintered ore and the utilization rate of the fuel are influenced. In the sintering fuel granule after four roller crushings in the prior art, fine grain fuel (granularity <0.5mm or granularity < 1mm) is difficult to control or can't sieve completely, and then is difficult to ensure that the granularity of sintering fuel is perfect to accord with the problem of the granularity demand of sintering process, the utility model provides a sintering fuel screening system. The sintering fuel screening system comprises a drying device and a screening device, wherein the drying device comprises a spiral conveying device and a heat exchange device. Wherein, the fuel outlet of the screw conveyer is connected to the feed inlet of the screening device. The heat exchange device is arranged around the periphery of the spiral conveying device. The sintering fuel is conveyed to a spiral conveying device and a heat medium in the heat exchange device to perform heat exchange drying (namely primary drying) after the crushing is completed, the sintering fuel (conveyed by a belt conveyor) after the drying is completed is conveyed to a screening device to be screened, undersize fine fuel with the grain size less than 0.5mm (or the grain size less than 1mm) is conveyed to a blast furnace coal injection after the screening is completed, and the sintering fuel meeting the sintering grain size requirement, namely oversize coarse fuel with the grain size of 0.5-3 mm (or the grain size of 1-3 mm), is conveyed to a sintering batching system to perform sintering batching. Adopt promptly sintering fuel screening system can realize controlling sintering fuel at 0.5 ~ 3mm (or 1 ~ 3mm) technical goal to improve the combustion efficiency and the utilization ratio of fuel, reduce sintering process's solid burnup, reduce carbon and discharge.
It is worth noting that, in the hydrogen-rich sintering technique, because the sintering process can produce more moisture, the fine grain fuel easily combines with water to form the thick liquid thing, reduces the gas permeability of the sinter bed by a wide margin, causes great influence to the output and the quality of sintering process, consequently, the utility model discloses also prevent in the hydrogen-rich sintering that the formation of fine grain thick liquid layer provides technical guarantee.
The utility model discloses in, drying device includes screw conveyer and heat transfer device. Wherein, the feed end of the spiral conveying device is provided with a fuel inlet, and the discharge end is provided with a fuel outlet. The screw conveyor includes a first rotating shaft, a screw conveyor blade, and a first drive device (e.g., a drive motor, not shown). In order to facilitate the sintering fuel to be smoothly and uniformly conveyed from the feeding end to the discharging end in the spiral conveying device, the first rotating shaft is arranged at the central axis position of the spiral conveying device. The spiral conveying blade is arranged on the first rotating shaft and is arranged around the periphery of the first rotating shaft. The first driving device is connected with the first rotating shaft and provides driving force for the rotation of the spiral conveying device. The first driving device drives the first rotating shaft to rotate and drives the spiral conveying blades to slowly rotate, so that the sintering fuel is conveyed from the feeding end to the discharging end. The heat exchange device is arranged around the periphery of the spiral conveying device. A heat medium inlet is formed in one side, close to the feeding end of the spiral conveying device, of the heat exchange device (namely one end, close to the fuel inlet of the spiral conveying device), and a heat medium outlet is formed in one side, close to the discharging end of the spiral conveying device (namely one end, close to the fuel outlet of the spiral conveying device). That is, after the heat medium enters the heat exchange device, the direction of the heat medium in the heat exchange device is consistent or basically consistent with the direction of the sintering fuel in the spiral conveying device. During the process of conveying the sintering fuel from the feed end to the discharge end of the spiral conveying device, the sintering fuel exchanges heat with a heat medium in the heat exchange device and is dried, so that the moisture content in the sintering fuel is reduced, and the screening effect of the sintering fuel is improved. Preferably, the heat exchange device is further internally provided with uniformly arranged flow guide spiral plates, and under the action of the flow guide spiral plates, a heat medium (such as hot steam) entering the heat exchange device can be more uniformly distributed, so that the heat exchange effect of the sintering fuel and the heat medium is ensured.
As preferred scheme, for avoiding sintering the dry in-process agglomeration phenomenon of fuel to cause the influence to subsequent screening, drying device still including breaking up the device. The feed end of the scattering device is connected with the discharge end of the spiral conveying device, and the scattering device and the spiral conveying device are directly communicated, so that the integrated drying device combining the spiral conveying device and the scattering device is formed. The heat exchange device is arranged around the periphery of the spiral conveying device and the scattering device. The utility model discloses in, be equipped with the bin outlet on the discharge end of breaing up the device, the bin outlet is connected with screening plant's feed inlet. The breaking device comprises a second rotating shaft, a beating paddle, and a second driving device (for example, a driving motor, not shown in the figure). In order to facilitate the uniform distribution and the smooth transportation of the sintering fuel in the scattering device, the second driving device is arranged at the central axis position of the scattering device. The beating paddle is arranged on the second rotating shaft. Because harden takes place easily through high temperature drying's moist fine particle, therefore hit the setting of beating the paddle and be in order to avoid sintering fuel to appear reunion phenomenon in drying process, accomplish sintering fuel's dispersion, from this, in the utility model discloses in hit the quantity of beating the paddle and preferably set up to a plurality ofly. The plurality of striking blades are evenly distributed around the periphery of the second rotational axis. The second driving device is connected with the second rotating shaft and provides driving force for the rotation of the scattering device. The second driving device drives the second rotating shaft to rotate and drives the beating paddle to rotate rapidly, so that the sintering fuel is conveyed to the discharge end from the feed end of the scattering device, heat exchange drying and sintering fuel dispersion are completed in the process, and the subsequent screening effect is further improved. Namely, the sintered fuel after heat exchange drying (i.e. primary drying) is completed in the spiral conveying device directly enters the scattering device, the sintered fuel continues to carry out heat exchange drying (i.e. secondary drying) with the heat medium in the heat exchange device in the scattering device, and meanwhile, the sintered fuel is dispersed under the rapid rotation of the beating blades, and the heat exchange effect of the sintered fuel and the heat medium is further ensured.
Sintering fuel screening system is mainly to accomplish the screening process of light fine particle, will not be conform to the fine particle fuel separation of sintering particle size requirement. Since the fine-grained sintered fuel is flammable and explosive, when the conditions such as concentration, temperature, oxygen content and the like are met, dust explosion is easy to occur, and serious engineering accidents are caused. Therefore, the utility model discloses set up nitrogen gas circulation measure in the drying process of sintering fuel. In the utility model, the discharge end of the drying device (i.e. the discharge end of the scattering device) is provided with N 2 An inlet, the feeding end of the drying device (namely the feeding end of the spiral conveying device) is provided with N 2 Outlet, i.e. N 2 The direction of flow in the drying device is opposite to the direction of flow of the sintering fuel in the drying device. Primary and secondary drying of the sintered fuel in drying apparatusAt the same time, N is 2 From said N 2 The inlet feeds into a drying apparatus, N 2 The input of the air-conditioning system can reduce the oxygen concentration in the drying device, thereby preventing the occurrence of dust explosion and improving the safety of the system; on the other hand, N 2 The circulation in the drying device can take away the hot steam generated in the heat exchange drying process of the sintering fuel, so that the drying efficiency is increased, and the screening effect of the subsequent sintering fuel is improved. Preferably, a deoxidizing device is further arranged in the nitrogen circulating measure, and N is 2 The outlet is connected to the air inlet of the oxygen removing device through a first pipeline, and the air outlet of the oxygen removing device is connected to the N through a second pipeline 2 And (6) an inlet. N into the drying apparatus 2 After passing through the scattering device and the screw conveyer, the gas in the drying device is changed into oxygen-containing N carrying high-temperature water vapor generated by sintering fuel 2 Containing oxygen N 2 From N 2 The discharged gas enters a deoxidizing device for deoxidizing treatment and then circularly enters a drying device, thereby realizing N 2 The recycling of (2). Consider a variation from N 2 Oxygen-containing N discharged from the outlet 2 Takes away the hot steam generated in the heat exchange process of the sintering fuel, thereby separating a part of oxygen-containing N with the hot steam 2 For N before entering the drying device 2 Carrying out isolated preheating to realize the waste heat utilization of hot steam, and the preheated oxygen-containing N 2 Then enters into the deoxidizing device to be deoxidized and recycled.
The utility model discloses in, be equipped with feed inlet and discharge gate on the screening plant. The feed inlet sets up in one side at the screening plant top, and the discharge gate sets up the opposite side in the screening plant bottom, and sintering fuel all is in the process of accomplishing the screening at vertical direction from the top down, from one side to the opposite side at the horizontal direction after getting into the screening plant promptly to it is long to have ensured that the screening of sintering fuel in the screening plant is long, has improved the screening effect of sintering fuel. As the preferred scheme, the utility model discloses an improve sintering fuel's screening efficiency, therefore set up the baffle in screening plant. The inner space of the screening device is divided into an upper screening area and a lower screening area by the partition board, an upper screen is arranged in the upper screening area, and a lower screen is arranged in the lower screening area. After the sintered fuel enters the screening device, the upper screening region and the lower screening region can be screened simultaneously. The baffle still divides the feed inlet of screening plant into first feed inlet and second feed inlet, and first feed inlet is linked together with upper portion screening region, and the second feed inlet is linked together with lower part screening region. The discharge port comprises a first coarse material outlet and a first fine material outlet which correspond to the upper screening area, and further comprises a second coarse material outlet and a second fine material outlet which correspond to the lower screening area. Wherein, the lateral wall of upper portion screen cloth and screening plant constitutes first coarse material export, constitutes first fine material export between upper portion screen cloth and the baffle. A second coarse material outlet is formed between the lower screen and the partition plate, and a second fine material outlet is formed between the lower screen and the side wall of the screening device. In order to facilitate the collection and uniform transportation of oversize coarse fuel or undersize fine fuel, in the utility model, the first coarse material outlet is communicated with the second coarse material outlet (for example, the first coarse material outlet and the second coarse material outlet are communicated through a tee pipe fitting) to form a coarse material outlet; the first fine material outlet is communicated with the second fine material outlet to form a fine material outlet. After the sintering fuel discharged from the drying device, the sintering fuel enters the upper screening area and the lower screening area of the screening device through the first feed port and the second feed port respectively, due to the arrangement of the partition plates, the sintering fuel can be screened simultaneously in the upper screening area and the lower screening area of the screening device, the screening effect is not influenced, the screening time is shortened, and the screening efficiency of the sintering fuel is greatly improved. After the screening is finished, oversize coarse-grained fuel meeting the sintering granularity requirement is discharged from a coarse material outlet of the screening device, and undersize fine-grained fuel is discharged from a fine material outlet of the screening device.
In order to further improve screening efficiency, the screening plant still includes vibrating motor, support and damping spring. The vibrating motor is connected with the shell of the screening device and provides a vibration source for the vibration screening of the screening device. In the screening process, under the action of the exciting force generated by the vibration motor, the sintering fuel is continuously thrown up on the upper screen and/or the lower screen and makes a jumping forward linear motion, and the moisture content of the sintering fuel is obviously reduced after the sintering fuel is dried by the drying device, so that a better screening effect can be obtained based on the linear vibration principle. The support sets up in the lower part of screening plant casing for support screening plant. Still be equipped with damping spring between support and the screening plant casing, when vibrating motor produced exciting force and improves screening efficiency, damping spring can play certain buffering guard action for screening plant.
The utility model discloses in, the sieve mesh size of screening plant's upper portion screen cloth and lower part screen cloth all can adjust as required according to actual technological requirement, and according to sintering process requirement, this sieve mesh size is generally for being less than or equal to 1mm, preferably 0.5 ~ 1 mm. For example, the sintering process requires the particle size of the sintering fuel to be 1-3 mm, and the screening device performs the screening process of light fine particles, so the mesh size of the upper screen and the lower screen of the screening device can be set to be 1 mm. The utility model discloses in, be 0.5 ~ 3mm when sintering process requires to the granularity of sintering fuel, then can with this moment screening plant's upper portion screen cloth and lower part screen cloth's sieve mesh size set up to 0.5mm, and then isolate the particle size <0.5 mm's fine grain fuel to obtain the sintering fuel that accords with the sintering granularity requirement.
In the present invention, the sintered fuel screening system further comprises a fuel conveying device (e.g., belt conveyor) and a buffer bin disposed upstream of the drying device. The buffer bin is additionally arranged, so that the sintering fuel after the fuel conveying device transports is conveyed to the drying device better, and the buffer bin can also play a role in temporary storage. In addition, if the discharge end of the fuel conveying device is directly connected with the feed inlet of the drying device, fine powder dust in fuel particles is easily caused, and then the waste of fuel is caused, and the environment is polluted.
Based on above-mentioned sintering fuel screening system, the utility model discloses still provide an use the sintering fuel screening technology of above-mentioned system, this technology includes following step:
1) primary drying: and conveying the sintering fuel to be treated to a spiral conveying device of the drying device, and introducing a heat medium into the heat exchange device. And the sintering fuel entering the spiral conveying device and the heat medium in the heat exchange device are subjected to heat exchange drying to complete primary drying.
In the step 1), a heat medium may be introduced into the heat exchange device, and after the drying device is preheated by the heat medium, the sintering fuel to be treated is conveyed to the drying device for heat exchange and drying.
2) Secondary drying: and directly feeding the primary dried sintering fuel into a scattering device of the drying device, and scattering the primary dried sintering fuel by the scattering device. Meanwhile, the sintered fuel after the primary drying continuously exchanges heat with a heat medium in a heat exchange device for drying, and secondary drying is completed.
3) And (3) screening the upper part and the lower part: and the sintered fuel after secondary drying enters an upper screening area and a lower screening area of the screening device through the first feed inlet and the second feed inlet respectively. And starting the vibration motor, and simultaneously screening the upper screening area and the lower screening area. After the screening is finished, oversize coarse-grained fuel meeting the sintering granularity requirement is discharged from a coarse material outlet of the screening device, and undersize fine-grained fuel is discharged from a fine material outlet of the screening device.
4) And conveying the oversize coarse fuel which meets the sintering granularity requirement and is discharged from the coarse material outlet to a sintering batching system.
5) Undersize fine fuel discharged from the fine feed outlet is delivered to the blast furnace.
Considering that the fuel of the fine fraction is inflammable and explosive and is easy to generate dust explosion phenomenon, the drying process of the step 1) and the step 2) also comprises the step of introducing N into the drying device 2 The method comprises the following steps: by breaking up N on the device 2 N is introduced into the drying device from the inlet 2 After passing through the scattering device and the screw conveyer, the gas in the drying device is changed into oxygen-containing N carrying high-temperature water vapor generated by sintering fuel 2 Containing oxygen N 2 From N on the screw conveyer 2 And discharging from an outlet. The utility model discloses an let in N in to drying device 2 The oxygen concentration in the drying device is reduced, thereby preventing the occurrence of dust explosion.
In the bookIn the novel drying device, N can also be introduced into the drying device firstly 2 Then the sintering fuel to be treated is conveyed into a drying device for heat exchange and drying, namely the sintering fuel is in N 2 The heat exchange drying is carried out under the protective atmosphere, thereby ensuring the safety of the system.
Preferably from N 2 A portion of the outlet bleed containing oxygen N 2 After the deoxidization treatment is carried out by the deoxidization device, the mixture circularly enters a drying device, and the other part of the mixture contains oxygen N 2 Then for N before entering the drying device 2 Carrying out isolated preheating, and the preheated oxygen-containing N 2 Then enters into the deoxidizing device to be deoxidized and recycled. The utility model discloses with N 2 Outlet bleed of oxygen-containing N 2 The waste of nitrogen resources is avoided by recycling after the deoxidization treatment; while containing partly oxygen N 2 For N before entering the drying device 2 Preheating is carried out, and the utilization rate of waste heat resources is improved.
The utility model discloses in, one-level drying and second grade are dry mainly based on the dry theory of operation of heat transfer, the hot medium can select cold quick-witted waste gas of sintering ring or blast furnace hot-blast stove waste gas. The temperature of the heat medium is 200 to 500 ℃, preferably 300 to 400 ℃. For example, the utility model discloses can directly adopt the cold machine of ring to retrieve to exhaust-heat boiler, the temperature is about 380 ℃ sintering flue gas and carries out the two-stage drying to fuel. Generally, the moisture content of the sintering fuel is about 10%, and according to the test measurement result, when the moisture content is reduced to below 7%, the sieving effect of the sintering fuel can be obviously improved. Therefore, the heat exchange time required for achieving the predicted heat exchange effect is relatively short, the sintering flue gas temperature loss after heat exchange is completed is small, the sintering flue gas can be returned to the waste heat boiler for recycling, the resource utilization rate is greatly improved, and the energy consumption is reduced.
In the present application, the length of the screw conveyor is 0.1 to 6m, preferably 0.2 to 5m, more preferably 0.3 to 4.5m, and still more preferably 0.4 to 4 m. The length of the breaking device is 0.1-5m, preferably 0.2-4m, more preferably 0.3-3 m.
Compared with the prior art, the utility model discloses following beneficial technological effect has:
1. the utility model discloses can require production preparation sintering fuel according to the granularity of setting for, solve the problem that the fuel granularity influences sintering deposit finished product quality and energy utilization efficiency too carefully, improve the yield of sintering deposit, reduce sintering process's solid burnup, reduce the carbon and discharge.
2. The utility model adopts the drying device comprising the spiral conveying device and the scattering device to carry out two-stage drying on the sintering fuel, thereby reducing the moisture content of the sintering fuel and improving the screening effect of the sintering fuel; meanwhile, the arrangement of the scattering device can also avoid the influence of agglomeration phenomenon in the drying process of the sintering fuel on the screening, thereby further improving the screening effect of the sintering fuel.
3. The utility model discloses set up nitrogen gas circulation measure in the drying process of sintering fuel, when drying device carries out heat transfer drying to sintering fuel, with N 2 Conveying into a drying apparatus, on the one hand, N 2 The input of the air-conditioning system can reduce the oxygen concentration in the drying device, thereby preventing the occurrence of dust explosion and improving the safety of the system; on the other hand, N 2 The circulation in the drying device can take away the hot steam generated in the heat exchange drying process of the sintering fuel, so that the drying efficiency is increased, and the screening effect of the subsequent sintering fuel is improved.
4. Screening plant include that the upper portion screening is regional and the lower part screening is regional, after the sintering fuel after the dry completion got into the screening device, screening is regional simultaneously with the lower part screening in upper portion screening, shortens when screening when not influencing the screening effect promptly and sieves long, has improved the screening efficiency of sintering fuel greatly.
5. The utility model discloses can directly adopt the cold machine of ring to retrieve to exhaust-heat boiler's sintering flue gas carries out the two-stage heat transfer dry to fuel, and sintering flue gas temperature loss after accomplishing the heat transfer is less, can return exhaust-heat boiler and carry out recycle once more, has improved the utilization ratio of resource greatly, has reduced the energy consumption.
Drawings
FIG. 1 is a schematic structural diagram of a sintered fuel screening system according to the present invention;
FIG. 2 is a schematic structural view of a drying apparatus according to the present invention;
FIG. 3 is a schematic structural view of the oxygen removing device of the present invention;
fig. 4 is a schematic structural diagram of the middle screening device of the present invention.
Reference numerals:
1: a screening device; 101: a feed inlet; 10101: a first feed port; 10102: a second feed port; 102: a discharge port; 10201: a coarse material outlet; 10202: a fine material outlet; 103: a partition plate; 104: an upper screening area; 10401: an upper screen; 105: a lower screening area; 10501: a lower screen; 106: a vibration motor; 107: a support; 108: a damping spring; a: a drying device; 2: a screw conveyor; 201: a fuel inlet; 202: a first rotating shaft; 203: a screw conveying blade; 3: a heat exchange device; 301: a heat medium inlet; 302: a thermal medium outlet; 303: a flow guiding spiral plate; 4: a breaking device; 401: a discharge outlet; 402: a second rotating shaft; 403: beating the paddle; 501: n is a radical of 2 An inlet; 502: n is a radical of hydrogen 2 An outlet; 6: a deaerator; 7: a fuel delivery device; 8: a buffer bin; l1: a first conduit; l2: a second conduit.
Detailed Description
According to a first embodiment of the present invention, a sintered fuel screening system is provided.
A sintered fuel screening system includes a drying device A and a screening device 1. The drying device A comprises a spiral conveying device 2 and a heat exchange device 3. The spiral conveying device 2 is provided with a fuel inlet 201 and a fuel outlet. The fuel outlet of the screw conveyor 2 is connected to the feed inlet 101 of the screening device 1. The heat exchange device 3 is arranged around the periphery of the spiral conveying device 2. The heat exchanger 3 is provided with a heat medium inlet 301 and a heat medium outlet 302.
In the present invention, the drying device a further comprises a scattering device 4. The feed end of the scattering device 4 is connected with the discharge end of the spiral conveying device 2, and the scattering device 4 is communicated with the spiral conveying device 2. The heat exchange device 3 is arranged around the periphery of the spiral conveying device 2 and the scattering device 4. The discharge opening 401 of the breaking up device 4 is connected to the feed opening 101 of the screening device 1.
Preferably, the discharge end of the scattering device 4 is provided with N 2 An inlet 501. The feed end of the spiral conveying device 2 is provided with N 2 An outlet 502. Preferably, the system further comprises an oxygen removal device 6. From N 2 A first conduit L1 leading from the outlet 502 is connected to the inlet of the oxygen removal device 6. The outlet of the deaerating means 6 is connected to N via a second conduit L2 2 An inlet 501.
In the present invention, the screw conveyor 2 includes a first rotating shaft 202, a screw conveying blade 203, and a first driving device. Wherein the first rotating shaft 202 is arranged at the position of the central axis of the screw conveyor 2. The conveying screw blade 203 is provided on the first rotating shaft 202 and is provided around the outer periphery of the first rotating shaft 202. The first driving device is connected to the first rotating shaft 202. The first driving device drives the first rotating shaft 202 to rotate and drives the spiral conveying blade 203 to rotate.
In the present invention, the scattering device 4 includes a second rotating shaft 402, a beating paddle 403, and a second driving device. Wherein the second rotating shaft 402 is arranged at the central axis of the scattering device 4. The striking blades 403 are arranged on the second rotation axis 402. Preferably, the number of the striking blades 403 is plural. The plurality of striking paddles 403 are evenly distributed around the circumference of the second rotational axis 402. The second driving means is connected to the second rotating shaft 402. The second driving device drives the second rotating shaft 402 to rotate and drives the beating paddle 403 to rotate.
Preferably, a flow guiding spiral plate 303 is arranged in the heat exchange device 3. Preferably, the number of the flow guiding spiral plates 303 is multiple. Along the trend of the sintering fuel in the drying device a, the plurality of flow guiding spiral plates 303 are uniformly arranged in sequence.
Preferably, the heat medium inlet 301 of the heat exchange device 3 is arranged on one side of the heat exchange device 3 close to the feeding end of the spiral conveying device 2. The heat medium outlet 302 of the heat exchange device 3 is arranged on one side of the heat exchange device 3 close to the discharge end of the scattering device 4.
The utility model discloses in, be equipped with feed inlet 101 and discharge gate 102 on the screening plant 1. The inlet 101 is located on one side of the top of the screening device 1 and the outlet 102 is located on the other side of the bottom of the screening device 1.
A partition 103 is provided in the screening device 1. The partition 103 divides the inner space of the screening arrangement 1 into an upper screening area 104 and a lower screening area 105. An upper screen 10401 is provided in the upper screening zone 104 and a lower screen 10501 is provided in the lower screening zone 105. And the partition 103 divides the feed opening 101 of the screening device 1 into a first feed opening 10101 and a second feed opening 10102. The first feed opening 10101 communicates with the upper screening area 104. The second feed port 10102 communicates with the lower screening area 105.
The discharge port 102 includes a first coarse material outlet, a first fine material outlet, a second coarse material outlet, and a second fine material outlet. Wherein the upper screen 10401 and the side wall of the screening device 1 form a first coarse material outlet, and a first fine material outlet is formed between the upper screen 10401 and the partition 103. A second coarse material outlet is formed between the lower screen 10501 and the partition 103, while a second fine material outlet is formed between the lower screen 10501 and the side wall of the screening device 1.
In the present invention, the first coarse material outlet is connected to the second coarse material outlet to form a coarse material outlet 10201. The first fine material outlet is in communication with the second fine material outlet to form fine material outlet 10202.
Preferably, the mesh size of the upper screen 10401 and/or the lower screen 10501 is 1mm or less, preferably 0.5 to 1 mm.
Preferably, the screening device 1 further comprises a vibration motor 106, a bracket 107 and a damping spring 108. The vibrating motor 106 is connected with the shell of the screening device 1, and the vibrating motor 106 provides a vibration source for screening of the screening device 1. Said support 107 is arranged in the lower part of the housing of the screening device 1 for supporting the screening device 1. A damping spring 108 is also arranged between the bracket 107 and the housing of the screening device 1.
In the utility model discloses in, this system still includes the sintering feed proportioning system. The coarse material outlet 10201 of the screening device 1 is connected to a sintering batching system.
In the utility model, the system also comprises a blast furnace. The fine material outlet 10202 of the screening device 1 is connected to a blast furnace.
In the present invention, the system further comprises a fuel conveying device 7 and a buffer bin 8 arranged upstream of the screw conveyor 2. The discharge end of the fuel conveying device 7 is connected with the feed inlet of the buffer bin 8, and the discharge port of the buffer bin 8 is connected with the fuel inlet 201 of the spiral conveying device 2. Preferably, the fuel delivery device 7 is a belt conveyor.
Example 1
As shown in fig. 1, a sintered fuel screening system includes a drying device a and a screening device 1. The drying device A comprises a spiral conveying device 2 and a heat exchange device 3. The spiral conveying device 2 is provided with a fuel inlet 201 and a fuel outlet. The fuel outlet of the screw conveyor 2 is connected to the feed inlet 101 of the screening device 1. The heat exchange device 3 is arranged around the periphery of the spiral conveying device 2. The heat exchanger 3 is provided with a heat medium inlet 301 and a heat medium outlet 302.
Example 2
Example 1 is repeated except that the drying means a further comprise a breaking means 4. The feed end of the scattering device 4 is connected with the discharge end of the spiral conveying device 2, and the scattering device 4 is communicated with the spiral conveying device 2. The heat exchange device 3 is arranged around the periphery of the spiral conveying device 2 and the scattering device 4. The discharge opening 401 of the breaking up device 4 is connected to the feed opening 101 of the screening device 1.
Example 3
As shown in fig. 2, embodiment 2 is repeated except that the screw conveyor 2 includes a first rotating shaft 202, a screw conveyor blade 203, and a first driving device. Wherein the first rotating shaft 202 is arranged at the position of the central axis of the screw conveyor 2. The conveying screw blade 203 is provided on the first rotating shaft 202 and is provided around the outer periphery of the first rotating shaft 202. The first driving device is connected to the first rotating shaft 202. The first driving device drives the first rotating shaft 202 to rotate and drives the spiral conveying blade 203 to rotate.
Example 4
Example 3 is repeated except that the breaking device 4 comprises a second rotating shaft 402, a beating paddle 403 and a second driving device. Wherein the second rotating shaft 402 is arranged at the central axis of the scattering device 4. The striking blades 403 are arranged on the second rotation axis 402. The number of the striking blades 403 is plural. The plurality of striking paddles 403 are evenly distributed around the circumference of the second rotational axis 402. The second driving means is connected to the second rotating shaft 402. The second driving device drives the second rotating shaft 402 to rotate and drives the beating paddle 403 to rotate.
Example 5
Example 4 is repeated except that a flow guiding spiral plate 303 is arranged in the heat exchange device 3. The number of the flow guide spiral plates 303 is multiple. Along the direction of the sintering fuel in the drying device a, the plurality of flow guide spiral plates 303 are uniformly arranged in sequence. The heat medium inlet 301 of the heat exchange device 3 is arranged on one side of the heat exchange device 3 close to the feeding end of the spiral conveying device 2. The thermal medium outlet 302 of the heat exchange device 3 is arranged on one side of the heat exchange device 3 close to the discharge end of the scattering device 4.
Example 6
Example 5 is repeated, except that the discharge end of the scattering device 4 is provided with N 2 An inlet 501. The feed end of the spiral conveying device 2 is provided with N 2 An outlet 502.
Example 7
Example 6 is repeated, as shown in fig. 3, except that the system further comprises an oxygen removal means 6. From N 2 A first conduit L1 leading from the outlet 502 is connected to the inlet of the oxygen removal device 6. The outlet of the deaerating means 6 is connected to N via a second conduit L2 2 An inlet 501.
Example 8
As shown in fig. 4, example 7 is repeated except that the screening device 1 is provided with an inlet 101 and an outlet 102. The inlet 101 is located on one side of the top of the screening device 1 and the outlet 102 is located on the other side of the bottom of the screening device 1.
A partition 103 is provided in the screening device 1. The partition 103 divides the inner space of the screening arrangement 1 into an upper screening area 104 and a lower screening area 105. An upper screen 10401 is provided in the upper screening zone 104 and a lower screen 10501 is provided in the lower screening zone 105. And the partition 103 divides the feed opening 101 of the screening device 1 into a first feed opening 10101 and a second feed opening 10102. The first feed opening 10101 communicates with the upper screening area 104. The second feed port 10102 communicates with the lower screening area 105.
The discharge port 102 includes a first coarse material outlet, a first fine material outlet, a second coarse material outlet, and a second fine material outlet. Wherein the upper screen 10401 and the side wall of the screening device 1 form a first coarse material outlet, and a first fine material outlet is formed between the upper screen 10401 and the partition 103. A second coarse material outlet is formed between the lower screen 10501 and the partition 103, while a second fine material outlet is formed between the lower screen 10501 and the side wall of the screening device 1.
Example 9
Example 8 was repeated except that the first coarse material outlet was in communication with the second coarse material outlet, constituting coarse material outlet 10201. The first fine material outlet is in communication with the second fine material outlet to form fine material outlet 10202.
Example 10
Example 9 is repeated except that the screening device 1 further comprises a vibration motor 106, a bracket 107 and a damping spring 108. The vibration motor 106 is connected with the shell of the screening device 1, and the vibration motor 106 provides a vibration source for screening of the screening device 1. Said support 107 is arranged in the lower part of the housing of the screening device 1 for supporting the screening device 1. A damping spring 108 is also arranged between the bracket 107 and the housing of the screening device 1.
Example 11
Example 10 was repeated except that the system also included a sinter batch system. The coarse material outlet 10201 of the screening device 1 is connected to a sintering batching system.
Example 12
Example 11 was repeated except that the system further included a blast furnace. The fine material outlet 10202 of the screening device 1 is connected to a blast furnace.
Example 13
Example 12 is repeated except that the system further comprises a fuel delivery device 7 and a buffer bin 8 arranged upstream of the screw conveyor 2. The discharge end of the fuel conveying device 7 is connected with the feed inlet of the buffer bin 8, and the discharge port of the buffer bin 8 is connected with the fuel inlet 201 of the spiral conveying device 2. The fuel delivery device 7 is a belt conveyor.
Example 14
Example 13 was repeated except that the upper screen 10401 and the lower screen 10501 each had a mesh size of 1 mm.
Example 15
Example 13 was repeated except that the upper screen 10401 and the lower screen 10501 each had a screen opening size of 0.5 mm.
Claims (18)
1. A sintered fuel screening system characterized by: the system comprises a drying device (A) and a screening device (1); the drying device (A) comprises a spiral conveying device (2) and a heat exchange device (3); the spiral conveying device (2) is provided with a fuel inlet (201) and a fuel outlet; the fuel outlet of the spiral conveying device (2) is connected to the feeding hole (101) of the screening device (1); the heat exchange device (3) is arranged around the periphery of the spiral conveying device (2); the heat exchange device (3) is provided with a heat medium inlet (301) and a heat medium outlet (302);
wherein the length of the spiral conveying device (2) is 0.1-6 m.
2. The sintered fuel screening system of claim 1, wherein: the drying device (A) also comprises a scattering device (4); the feeding end of the scattering device (4) is connected with the discharging end of the spiral conveying device (2), and the scattering device (4) is communicated with the spiral conveying device (2); the heat exchange device (3) is arranged around the periphery of the spiral conveying device (2) and the scattering device (4); the discharge outlet (401) of the scattering device (4) is connected to the feed inlet (101) of the screening device (1).
3. The sintered fuel screening system of claim 2, wherein: the discharge end of the scattering device (4) is provided with N 2 An inlet (501); the feed end of the spiral conveying device (2) is provided with N 2 An outlet (502).
4. The sintered fuel screening system of claim 3, wherein: the system further comprises an oxygen removal device (6); from N 2 A first pipeline (L1) leading out from the outlet (502) is connected to the air inlet of the oxygen removing device (6); the outlet of the oxygen removal device (6) is connected to N via a second conduit (L2) 2 An inlet (501).
5. The sintered fuel screening system of any of claims 1-4, wherein: the spiral conveying device (2) comprises a first rotating shaft (202), a spiral conveying blade (203) and a first driving device; wherein the first rotating shaft (202) is arranged at the central axis position of the spiral conveying device (2); the spiral conveying blade (203) is arranged on the first rotating shaft (202) and is arranged around the periphery of the first rotating shaft (202); the first driving device is connected with the first rotating shaft (202); the first driving device drives the first rotating shaft (202) to rotate and drives the spiral conveying blade (203) to rotate.
6. The sintered fuel screening system of claim 2, wherein: the scattering device (4) comprises a second rotating shaft (402), a beating paddle (403) and a second driving device; the second rotating shaft (402) is arranged at the central axis position of the scattering device (4); the striking blade (403) is arranged on the second rotational axis (402).
7. The sintered fuel screening system of claim 6, wherein: the number of the beating paddles (403) is multiple; a plurality of said striking blades (403) being evenly distributed around the periphery of the second rotation axis (402); the second driving device is connected with the second rotating shaft (402); the second driving device drives the second rotating shaft (402) to rotate and drives the beating paddle (403) to rotate.
8. The sintered fuel screening system of claim 2, wherein: a flow guide spiral plate (303) is arranged in the heat exchange device (3).
9. The sintered fuel screening system of claim 8, wherein: the number of the flow guide spiral plates (303) is multiple; along the trend of the sintering fuel in the drying device (A), the plurality of flow guide spiral plates (303) are sequentially and uniformly distributed.
10. The sintered fuel screening system of claim 8, wherein: the heat medium inlet (301) of the heat exchange device (3) is arranged on one side, close to the feeding end of the spiral conveying device (2), of the heat exchange device (3); and a heat medium outlet (302) of the heat exchange device (3) is arranged on one side of the heat exchange device (3) close to the discharge end of the scattering device (4).
11. The sintered fuel screening system of any of claims 1-4, 6-10, wherein: a feeding hole (101) and a discharging hole (102) are formed in the screening device (1); the feeding hole (101) is positioned at one side of the top of the screening device (1), and the discharging hole (102) is positioned at the other side of the bottom of the screening device (1);
a clapboard (103) is arranged in the screening device (1); said partition (103) dividing the internal space of the screening device (1) into an upper screening area (104) and a lower screening area (105); an upper screen (10401) is arranged in the upper screening area (104), and a lower screen (10501) is arranged in the lower screening area (105); the partition plate (103) divides a feeding hole (101) of the screening device (1) into a first feeding hole (10101) and a second feeding hole (10102); the first feed inlet (10101) is in communication with the upper screening region (104); the second feed inlet (10102) communicates with the lower screening zone (105);
the discharge port (102) comprises a first coarse material outlet, a first fine material outlet, a second coarse material outlet and a second fine material outlet; wherein, the upper screen (10401) and the side wall of the screening device (1) form a first coarse material outlet, and a first fine material outlet is formed between the upper screen (10401) and the partition plate (103); a second coarse material outlet is formed between the lower screen (10501) and the partition plate (103), and meanwhile, a second fine material outlet is formed between the lower screen (10501) and the side wall of the screening device (1).
12. The sintered fuel screening system of claim 11, wherein: the first coarse material outlet is communicated with the second coarse material outlet to form a coarse material outlet (10201); the first fine material outlet is in communication with the second fine material outlet to form a fine material outlet (10202).
13. The sintered fuel screening system of claim 11, wherein: the screen hole size of the upper screen (10401) and/or the lower screen (10501) is less than or equal to 1 mm.
14. The sintered fuel screening system of claim 11, wherein: the screen hole size of the upper screen (10401) and/or the lower screen (10501) is 0.5-1 mm.
15. The sintered fuel screening system of claim 11, wherein: the screening device (1) further comprises a vibration motor (106), a bracket (107) and a damping spring (108); the vibration motor (106) is connected with the shell of the screening device (1), and the vibration motor (106) provides a vibration source for screening of the screening device (1); the bracket (107) is arranged at the lower part of the shell of the screening device (1) and is used for supporting the screening device (1); and a damping spring (108) is also arranged between the bracket (107) and the shell of the screening device (1).
16. The sintered fuel screening system of claim 12, wherein: the system also includes a sinter batch system; the coarse material outlet (10201) of the screening device (1) is connected to a sintering batching system; and/or
The system also includes a blast furnace; the fine material outlet (10202) of the screening device (1) is connected to a blast furnace.
17. The sintered fuel screening system of any of claims 1-4, 6-10, 12-16, wherein: the system also comprises a fuel conveying device (7) and a buffer bin (8) which are arranged at the upstream of the spiral conveying device (2); the discharge end of the fuel conveying device (7) is connected with the feed inlet of the buffer bin (8), and the discharge outlet of the buffer bin (8) is connected with the fuel inlet (201) of the spiral conveying device (2).
18. The sintered fuel screening system of claim 17, wherein: the fuel conveying device (7) is a belt conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331826.0U CN217210227U (en) | 2021-12-23 | 2021-12-23 | Sintering fuel screening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331826.0U CN217210227U (en) | 2021-12-23 | 2021-12-23 | Sintering fuel screening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217210227U true CN217210227U (en) | 2022-08-16 |
Family
ID=82785922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123331826.0U Active CN217210227U (en) | 2021-12-23 | 2021-12-23 | Sintering fuel screening system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217210227U (en) |
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2021
- 2021-12-23 CN CN202123331826.0U patent/CN217210227U/en active Active
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