Regenerative chamber blowing-type iron ore sintering zero-carbon ignition heat preservation device
Through the regenerator-type blast-type iron ore sintering zero-carbon ignition and insulation device, combined with electric ignition, oxygen-enriched ignition and biomass surface injection, the problems of high carbon emissions, uneven ignition and short furnace lining life in the iron ore sintering ignition link have been solved, achieving clean and green zero-carbon ignition and extended furnace lining life.
Patent Information
- Application Number
- CN202422425300.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing iron ore sintering ignition process has problems such as high carbon emissions, uneven ignition and short life of the ignition furnace lining.
A regenerative chamber blast-type iron ore sintering zero-carbon ignition and insulation device is adopted. By eliminating the traditional gas burner and replacing it with a blast device and a heat storage device, combined with electric thermal ignition, oxygen-enriched ignition and biomass surface spraying, zero-carbon ignition is achieved.
It achieves clean, green, zero-carbon ignition, makes ignition more uniform, extends the life of the ignition furnace lining, and significantly reduces carbon emissions and energy consumption.
Smart Images
Figure CN223388937U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an iron ore sintering ignition and heat preservation device, in particular to a regenerator blast type iron ore sintering zero-carbon ignition and heat preservation device, belonging to the technical field of sintering. Background Art
[0002] During the sintering process, ignition is achieved through a high-temperature flame or atmosphere, igniting the coke powder within the material mixture on the sintering machine's trolley surface. This creates a high-temperature, uniform, red-hot combustion zone. Under the negative pressure of the exhaust from the lower flue, the combustion zone slowly descends, gradually completing the sintering of the sintering mixture at each height unit. Ultimately, when the combustion zone reaches the very bottom of the material layer, the sintering of the material layer carried by the trolley is complete. At this point, the trolley has also moved to the rear of the sintering machine, where it unloads the sintered ore for the next cooling stage. Ignition is a critical and crucial step in the sintering process. Uniform ignition, the quality of the resulting combustion zone, and the longevity of the ignition furnace all determine the quality, energy consumption, and operating efficiency of the entire sintering process.
[0003] The schematic diagram of the existing iron ore sintering ignition and holding furnace is as follows: Figure 1 、 Figure 2 As shown: After the sintering machine trolley is filled with sintering mixture through the nine-roller distributor, it slowly enters the hearth of the ignition furnace. It first enters the ignition section of the ignition furnace and is baked by the high-temperature flame formed by two rows of gas ignition burners in the ignition section. The coke powder in the mixture is gradually ignited to form a red-hot combustion zone; then it enters the insulation section of the ignition furnace and is baked by the medium-temperature flame formed by a row of insulation burners in the insulation section. The purpose is to keep the high-temperature sintered ore that has just been sintered warm and avoid the formation of cold and brittle powder ore due to rapid cooling.
[0004] One end of the top of the ignition furnace gas burner is connected to the gas pipeline. The gas used is generally industrial metallurgical by-product gas, such as blast furnace gas, converter gas, coke oven gas, high-speed mixed gas, high-coke mixed gas, etc., and a small part uses natural gas; the other end is connected to the air pipeline, which introduces the air blown in by the combustion blower and mixes with the gas to form a combustion flame.
[0005] The ignition furnace is generally installed parallel to the sintering machine trolley, located about 100-200mm above the sintering machine trolley railing. It consists of three beams (front beam, middle partition beam, rear beam), two furnace roofs (ignition section furnace roof, insulation section furnace roof) and four side walls (two ignition section side walls, two insulation section side walls). The total length is generally 7-9 meters, of which the ignition section is 3-4 meters and the insulation section is 4-5 meters.
[0006] With the introduction of my country's dual carbon strategy, reducing carbon emissions in the steel industry has become a key requirement for eliminating excess steel production capacity. As a key process in the steelmaking process, sintering carries a significant responsibility for carbon reduction. Currently, sintering still uses traditional coal gas ignition, which suffers from the following three major drawbacks.
[0007] 1. High carbon emissions: Since gas is used for ignition, carbon-containing combustibles such as CO and CH4 in the gas will generate CO2 after combustion, which will be drawn into the flue and then discharged, making the carbon emission index of the sintering process remain high.
[0008] 2. Uneven ignition: Since gas ignition is used, there is an obvious columnar flame. The temperatures of the outer flame, inner flame and flame core are different, and the temperature difference between the areas with flame and those without flame is also large. Therefore, it is very easy to cause uneven ignition of the iron ore sintering material surface, and local over-melting or over-raw phenomena often occur on the material surface, resulting in increased overall sintering energy consumption and increased carbon emissions.
[0009] 3. The life of the ignition furnace lining is short: Since gas ignition is used, the positions of the local high-temperature zone and the local low-temperature zone are relatively constant. The lining that is washed by the high-temperature zone flame for a long time is prone to cracking and peeling, resulting in a short life of the entire ignition furnace lining. Utility Model Content
[0010] In response to the problems of high carbon emissions, uneven ignition, and short life of the ignition furnace lining in the sintering ignition link using traditional gas ignition in the existing technology, the utility model has developed a heat storage chamber blast-type iron ore sintering zero-carbon ignition and insulation device. In the solution of the utility model, the gas burner of the traditional ignition and insulation furnace is eliminated and replaced by a blast device and a heat storage device arranged on the ignition and insulation furnace. Among them, the heat storage device can provide a high-temperature atmosphere for the sintering material surface for electric heating ignition, and the blast device can draw air outside the ignition and insulation furnace into the furnace, and heat the drawn-in air through the heat storage device, so as to achieve the purpose of hot air ignition when the air enters the furnace. No additional consumption of fossil energy such as gas is required during the ignition process, that is, clean and green zero-carbon ignition is achieved, and carbon emissions are significantly reduced compared to the existing technology; moreover, the electric heating ignition combined with hot air ignition is more uniform, and the life of the ignition furnace lining is also effectively extended.
[0011] The utility model also adds a biomass solid fuel distributor downstream of the existing sintering mixing distributor, through which the biomass solid fuel is sprayed onto the surface of the sintering mixture, thereby significantly reducing the ignition temperature of the sintering surface.
[0012] The utility model also adds a pure oxygen blowing device, through which pure oxygen is blown into the furnace of the ignition and holding furnace. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the combustion zone formed by ignition of biomass solid fuel or coke powder on the sintering material surface, thereby enhancing the ignition and sintering effect.
[0013] The utility model combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and does not require additional consumption of fossil energy such as coal gas for ignition. Therefore, the carbon consumption in the iron ore sintering ignition link is almost zero, realizing zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.
[0014] According to the implementation scheme of the utility model, a regenerator blast-type iron ore sintering zero-carbon ignition and heat preservation device is provided.
[0015] A regenerator-type, blast-type, zero-carbon ignition and heat preservation device for iron ore sintering includes a sintering trolley, an ignition and heat preservation furnace mounted above the sintering trolley, an air blast device mounted on the top of the ignition and heat preservation furnace, and a heat storage device. The air blast device includes a fan frame, a fan motor, a fan shaft, and fan blades. The fan frame is mounted on the top of the ignition and heat preservation furnace. The fan motor is located in the center of the top of the fan frame. The fan shaft is mounted within the fan frame and connected to the fan motor. The fan blades are mounted on the fan shaft. The heat storage device includes a heat storage chamber, heat storage balls, and a heating resistor. The heat storage chamber is mounted on the top of the ignition and heat preservation furnace, on the air outlet side of the air blast device. The heat storage balls are stacked within the heat storage chamber. The heating resistor is mounted on the inner wall of the heat storage chamber.
[0016] In the present invention, a blast device and a heat storage device are also provided on the furnace side of the ignition and heat preservation furnace. The blast device is installed outside the side wall of the ignition and heat preservation furnace, and the heat storage device is installed on the side wall of the ignition and heat preservation furnace and is located on the air outlet side of the blast device.
[0017] In the present invention, the device also includes a conductive device within the furnace lining. This device includes a power supply element, a furnace top conductive member connected to the power supply element, and a furnace side conductive member. The power supply element is located outside the ignition and holding furnace. The furnace top conductive member is embedded within the furnace lining and connected to a heat storage device located on the furnace top. The furnace side conductive member is embedded within the furnace lining and connected to a heat storage device located on the furnace side.
[0018] In the present invention, a plurality of fan blades are connected to the fan shaft. Preferably, the plurality of fan blades are evenly distributed along the circumference of the fan shaft.
[0019] In the present invention, the top of the ignition and holding furnace is equipped with multiple blasting devices. The blasting devices are evenly distributed along the running direction and width direction of the sintering trolley. Each blasting device is equipped with a heat storage device on its air outlet side.
[0020] In the present invention, a plurality of blasting devices are provided on the side of the ignition and holding furnace. The blasting devices are evenly distributed along the running direction of the sintering trolley. A heat storage device is provided on the air outlet side of each blasting device.
[0021] In the present invention, the top of the ignition and holding furnace is a flat top or an arc-shaped top, preferably an arc-shaped top.
[0022] In the present invention, along the running direction of the sintering trolley, the device further comprises a sintering mixture distributor and a biomass solid fuel distributor which are sequentially arranged above the sintering trolley and upstream of the ignition and holding furnace.
[0023] Preferably, the sintered mixture distributor and the biomass solid fuel distributor are both nine-roller distributors.
[0024] In the present invention, the device further includes a pure oxygen injection device disposed to the side of the ignition and holding furnace. The pure oxygen injection device comprises a pure oxygen pipeline and a pure oxygen nozzle. The pure oxygen pipeline is disposed outside the ignition and holding furnace. One end of the pure oxygen nozzle is connected to the pure oxygen pipeline, and the other end extends through the side wall of the ignition and holding furnace into the ignition and holding furnace.
[0025] Preferably, a plurality of pure oxygen blowing devices are respectively provided on both sides of the ignition and holding furnace, and the plurality of pure oxygen blowing devices are evenly distributed along the running direction of the sintering trolley.
[0026] To address the existing issues of high carbon emissions, uneven ignition, and short furnace lining life associated with traditional gas ignition in the sintering ignition process, the present invention improves upon existing technology and structural form to develop a regenerator-type, blast-type, zero-carbon ignition and insulation device for iron ore sintering. This invention eliminates the gas burner in the conventional ignition and insulation furnace and replaces it with a blast device and heat storage device mounted on the furnace roof. The blast device comprises a fan frame, a fan motor, a fan shaft, and fan blades. The fan frame is tightly mounted above the furnace roof of the ignition and insulation furnace. The fan motor is connected to the fan frame and mounted at the center of the top of the fan frame. The fan shaft is disposed within the fan frame and connected to the bottom of the fan motor. The fan blades are mounted on the fan shaft (preferably, multiple fan blades are evenly and symmetrically mounted on the fan shaft). The heat storage device comprises a heat storage chamber, a heat storage ball, and a heating resistor. The regenerator is closely connected to the roof of the ignition and holding furnace and is mounted on the outlet side of the blast mechanism. Regenerator balls are stacked within the regenerator (preferably, multiple balls are evenly stacked within the regenerator). Heating resistors are mounted on the side walls of the regenerator, heating the balls and air. Driven by the fan motor, the fan shaft rotates the fan blades, drawing air from outside the ignition and holding furnace roof into the furnace. This drawn-in air enters the regenerator chamber on the outlet side, where it is heated by the (energized) heating resistors and heated regenerator balls, thus enabling hot air ignition. In other words, the heated regenerator balls within the regenerator provide a high-temperature atmosphere for the sintering charge surface, enabling electric ignition. Simultaneously, the heated air drawn in by the blast mechanism ignites the charge surface, resulting in more uniform ignition and improved ignition quality. The utility model adopts a heat storage device for electric heating ignition and combines it with a blast device for hot air ignition. The sintering machine does not need to consume additional fossil energy such as gas, thereby realizing clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with the existing technology. Moreover, electric heating ignition does not have the columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and insulation furnace no longer exist, the ignition of the material surface is more uniform, and the quality is more guaranteed. Similarly, since the columnar flame disappears, the adverse working condition of the ignition and insulation furnace lining being locally eroded by high temperature flames and flue gas for a long time is avoided, so the lining life of the ignition and insulation furnace is also effectively extended.
[0027] As a preferred solution, the utility model is provided with a blast device and a heat storage device on the top of the ignition and heat preservation furnace, and further provides a blast device and a heat storage device on the side of the ignition and heat preservation furnace (one side or both sides, such as Figure 4 As shown, a blast device and a heat storage device are installed on one side or both sides of the sintering trolley. When the blast device and the heat storage device are installed on the top of the ignition and holding furnace, the blast device and the heat storage device are installed vertically on the top of the furnace; when the blast device and the heat storage device are installed on the side of the ignition and holding furnace, the blast device and the heat storage device are installed horizontally on the side of the furnace, that is, Figure 4 As shown, the fan frame of the air blast device is installed on the outside of the side wall of the ignition and holding furnace, while the heat storage chamber of the heat storage device is installed on the side wall of the ignition and holding furnace and is located on the air outlet side of the air blast device. With this arrangement, the top and sides of the ignition and holding furnace are both equipped with air blast devices and heat storage devices. The heat storage devices installed in multiple locations can provide a high-temperature atmosphere for the sintering material surface from different angles or positions for electric ignition. The air blast devices installed in multiple locations can draw air from outside the top and side walls of the ignition and holding furnace into the furnace to heat it and then ignite the sintering material surface with hot air, thereby further improving the ignition uniformity of the sintering material surface.
[0028] The present invention also features an internal conductive device within the furnace lining, specifically comprising a power supply element, a furnace top conductive member, and a furnace side conductive member. Generally speaking, the power supply element is positioned outside the ignition and holding furnace, the furnace top conductive member is embedded within the furnace lining and serves to connect the power supply element to the heat storage device located on the furnace top, and the furnace side conductive member is embedded within the furnace lining and serves to connect the power supply element to the heat storage device located on the furnace side. During operation, the power supply element supplies power to the heating resistor wire of each heat storage device via the furnace top conductive member or the furnace side conductive member, thereby heating the heat storage balls and air, achieving both electric heat ignition and hot air ignition.
[0029] This utility model also adds a biomass solid fuel distributor (e.g., a nine-roller distributor) downstream of the existing sinter mix distributor. This distributor sprays granular biomass solid fuel onto the sinter mix surface, blanketing the surface with a layer of biomass solid fuel. This significantly reduces the ignition temperature of the sinter mix. This coating significantly lowers the temperature at which the char powder on the sinter mix ignites, forming the combustion zone. For example, it can be reduced from 1150°C to 800°C or even lower (e.g., 700°C, 600°C, or 500°C).
[0030] Furthermore, the present invention eliminates the existing sintering machine's top air duct system and replaces it with a pure oxygen injection device. The pure oxygen injection device consists of a pure oxygen pipe and a pure oxygen nozzle, wherein the pure oxygen pipe is located outside the ignition and holding furnace (for example, outside the side wall), one end of the pure oxygen nozzle is tightly connected to the pure oxygen pipe, and the other end of the pure oxygen nozzle extends through the side wall of the ignition and holding furnace into the ignition and holding furnace. This arrangement allows pure oxygen to be blown into the ignition and holding furnace through the pure oxygen pipe and the pure oxygen nozzle. The pure oxygen mixes with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the biomass solid fuel or coke powder on the sintering material surface to form a combustion zone when it is ignited, for example, from 800°C to about 650°C, or from 700°C to about 570°C. The utility model improves the existing technology and structural form, combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and develops an electric-based ignition and insulation device for iron ore sintering. During the ignition process, the sintering machine does not need to consume additional fossil energy such as coal gas, and the carbon consumption in the ignition link is almost zero, realizing clean and green zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.
[0031] In the present invention, the top of the ignition and holding furnace can be Figure 4 The flat top shown can also be Figure 5 The arc-shaped top shown is preferably configured as an arc-shaped top for the top structure of the ignition and holding furnace. This configuration can eliminate the right-angle blind area in the furnace of the ignition and holding furnace and enhance the convection heat transfer effect of the hot air oxygen-enriched ignition.
[0032] Compared with the prior art, the present invention has the following beneficial technical effects:
[0033] 1. Low carbon emissions: Since the utility model adopts an ignition method that combines electric heat ignition, oxygen-enriched ignition and biomass surface spraying, the sintering machine does not need to consume additional fossil energy such as gas during the ignition process. That is, the carbon consumption of the iron ore sintering ignition link is almost zero, realizing clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with existing technologies.
[0034] 2. Uniform ignition: The utility model adopts a heat storage device and a blast device to ignite the sintering material surface. The heat storage device can provide a high-temperature atmosphere for the sintering material surface for electric thermal ignition. The blast device can inhale the air outside the ignition and insulation furnace into the furnace and heat the inhaled air through the heat storage device, thereby achieving the purpose of hot air ignition when the air enters the furnace. That is, hot air ignition is introduced on the basis of electric thermal ignition of the sintering material surface by the heat storage device, thereby further enhancing the ignition uniformity of the sintering material surface.
[0035] Moreover, since the utility model adopts electric heat ignition, there is no columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and holding furnace no longer exist, the ignition of the material surface is more uniform, and the quality is more guaranteed.
[0036] 3. Long service life of ignition furnace lining: Similarly, due to the disappearance of columnar flame, the ignition and holding furnace lining is avoided from being locally subjected to long-term harsh working conditions of high-temperature flame and flue gas erosion, so the service life of the ignition furnace lining is also effectively extended.
[0037] In summary, the present invention effectively solves the defects and deficiencies of the prior art without causing any other negative impacts, and has low investment and operating costs. It can be expected to have high application value in the future market. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 This is a simplified structural diagram of an existing iron ore sintering ignition and holding furnace;
[0039] Figure 2 This is a simplified structural diagram of the existing iron ore sintering distributor and ignition holding furnace;
[0040] Figure 3 This is a schematic structural diagram of the utility model's regenerator-type blast-type iron ore sintering zero-carbon ignition and heat preservation device;
[0041] Figure 4 This is a side view of the utility model equipped with a furnace top / furnace side blast device, a furnace top / furnace side heat storage device, and a pure oxygen blowing device;
[0042] Figure 5 This is a structural diagram of an ignition and holding furnace of the present invention having an arc-shaped top;
[0043] Figure 6 This is a schematic structural diagram of the air blowing device in the present utility model;
[0044] Figure 7 This is a structural diagram of the heat storage device in the present utility model;
[0045] Figure 8 This is another structural diagram of the heat storage device in the present utility model;
[0046] Figure 9 This is a schematic diagram of the structure of the conductive device inside the furnace lining in the present utility model.
[0047] Reference numerals:
[0048] 1: Sintering trolley; 2: Ignition and holding furnace; 3: Blowing device; 301: Fan frame; 302: Fan motor; 303: Fan shaft; 304: Fan blades; 4: Heat storage device; 401: Heat storage chamber; 402: Heat storage ball; 403: Heating resistance wire; 5: Conductive device inside the furnace lining; 501: Power supply element; 502: Conductive part on the furnace top; 503: Conductive part on the furnace side; 6: Sintering mixture distributor; 7: Biomass solid fuel distributor; 8: Pure oxygen injection device; 801: Pure oxygen pipeline; 802: Pure oxygen nozzle. DETAILED DESCRIPTION
[0049] The technical solution of the present invention is illustrated below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.
[0050] According to the implementation scheme of the utility model, a regenerator blast-type iron ore sintering zero-carbon ignition and heat preservation device is provided.
[0051] A regenerator-type, blast-type, zero-carbon ignition and heat preservation device for iron ore sintering comprises a sintering trolley 1, an ignition and heat preservation furnace 2 mounted above the sintering trolley 1, a blast device 3 mounted on the top of the ignition and heat preservation furnace 2, and a heat storage device 4. The blast device 3 comprises a fan frame 301, a fan motor 302, a fan shaft 303, and fan blades 304. The fan frame 301 is mounted on the top of the ignition and heat preservation furnace 2. The fan motor 302 is located at the top center of the fan frame 301. The fan shaft 303 is disposed within the fan frame 301 and connected to the fan motor 302. The fan blades 304 are mounted on the fan shaft 303. The heat storage device 4 comprises a regenerator 401, heat storage balls 402, and a heating resistor 403. The regenerator 401 is mounted on the top of the ignition and heat preservation furnace 2, on the air outlet side of the blast device 3. The heat storage balls 402 are stacked in the heat storage chamber 401. The heating resistance wire 403 is installed on the inner wall of the heat storage chamber 401.
[0052] In the present invention, a blast device 3 and a heat storage device 4 are also provided on the furnace side of the ignition and heat holding furnace 2. The blast device 3 is installed outside the side wall of the ignition and heat holding furnace 2, and the heat storage device 4 is installed on the side wall of the ignition and heat holding furnace 2 and is located on the air outlet side of the blast device 3.
[0053] In the present invention, the device also includes a furnace lining internal conductive device 5. This device 5 includes a power supply element 501, a furnace top conductive member 502 connected to the power supply element 501, and a furnace side conductive member 503. The power supply element 501 is located outside the ignition and holding furnace 2. The furnace top conductive member 502 is embedded in the furnace lining and connected to the heat storage device 4 located on the furnace top. The furnace side conductive member 503 is embedded in the furnace lining and connected to the heat storage device 4 located on the furnace side.
[0054] In the present invention, a plurality of fan blades 304 are connected to the fan shaft 303. Preferably, the plurality of fan blades 304 are evenly distributed along the circumference of the fan shaft 303.
[0055] In the present invention, the top of the ignition and holding furnace 2 is provided with a plurality of blasting devices 3. The blasting devices 3 are evenly distributed along the running direction and width direction of the sintering trolley 1. A heat storage device 4 is provided on the air outlet side of each blasting device 3.
[0056] In the present invention, a plurality of blasting devices 3 are provided on the furnace side of the ignition and holding furnace 2. The blasting devices 3 are evenly distributed along the running direction of the sintering trolley 1. A heat storage device 4 is provided on the air outlet side of each blasting device 3.
[0057] In the present invention, the roof of the ignition and holding furnace 2 is a flat roof or an arc-shaped roof, preferably an arc-shaped roof.
[0058] In the present invention, along the running direction of the sintering trolley 1, the device further includes a sintering mixture distributor 6 and a biomass solid fuel distributor 7 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition and holding furnace 2.
[0059] Preferably, the sintered mixture distributor 6 and the biomass solid fuel distributor 7 are both nine-roller distributors.
[0060] In the present invention, the device further includes a pure oxygen injection device 8 positioned to the side of the ignition and holding furnace 2. The pure oxygen injection device 8 comprises a pure oxygen pipeline 801 and a pure oxygen nozzle 802. The pure oxygen pipeline 801 is positioned outside the ignition and holding furnace 2. One end of the pure oxygen nozzle 802 is connected to the pure oxygen pipeline 801, and the other end extends through the side wall of the ignition and holding furnace 2 into the ignition and holding furnace 2.
[0061] Preferably, a plurality of pure oxygen blowing devices 8 are respectively provided on both sides of the ignition and holding furnace 2. The plurality of pure oxygen blowing devices 8 are evenly distributed along the running direction of the sintering trolley 1. Example 1
[0062] like Figure 3 、 6Figure 7 shows a regenerator-type, blast-type, zero-carbon ignition and heat preservation device for iron ore sintering. The device comprises a sintering trolley 1, an ignition and heat preservation furnace 2 mounted above the sintering trolley 1, a blast device 3 mounted on the top of the ignition and heat preservation furnace 2, and a heat storage device 4. The blast device 3 comprises a fan housing 301, a fan motor 302, a fan shaft 303, and fan blades 304. The fan housing 301 is mounted on the top of the ignition and heat preservation furnace 2. The fan motor 302 is located at the top center of the fan housing 301. The fan shaft 303 is disposed within the fan housing 301 and connected to the fan motor 302. The fan blades 304 are mounted on the fan shaft 303. The heat storage device 4 comprises a regenerator 401, heat storage balls 402, and a heating resistor 403. The regenerator 401 is mounted on the top of the ignition and heat preservation furnace 2, on the air outlet side of the blast device 3. The heat storage balls 402 are stacked in the heat storage chamber 401. The heating resistance wire 403 is installed on the inner wall of the heat storage chamber 401. Example 2
[0063] like Figure 4 As shown, Example 1 is repeated, except that a blast device 3 and a heat storage device 4 are also provided on the furnace side of the ignition and heat holding furnace 2. The blast device 3 is installed outside the side wall of the ignition and heat holding furnace 2, and the heat storage device 4 is installed on the side wall of the ignition and heat holding furnace 2 and is located on the air outlet side of the blast device 3. Example 3
[0064] like Figure 9 As shown, Example 2 is repeated, except that this device also includes a furnace lining internal conductive device 5. The furnace lining internal conductive device 5 includes a power supply element 501, a furnace top conductive member 502 connected to the power supply element 501, and a furnace side conductive member 503. The power supply element 501 is located outside the ignition and holding furnace 2. The furnace top conductive member 502 is embedded in the furnace lining and connected to the heat storage device 4 located on the furnace top. The furnace side conductive member 503 is embedded in the furnace lining and connected to the heat storage device 4 located on the furnace side. Example 4
[0065] Example 3 is repeated, except that a plurality of fan blades 304 are connected to the fan shaft 303. The plurality of fan blades 304 are evenly distributed along the circumference of the fan shaft 303. Example 5
[0066] Example 4 was repeated, except that the top of the ignition and holding furnace 2 was equipped with multiple blast devices 3. The blast devices 3 were evenly arranged in four rows along the travel direction of the sintering trolley 1 and in two rows along the width of the sintering trolley 1. Each blast device 3 was equipped with a heat storage device 4 on its outlet side. Example 6
[0067] Example 5 is repeated, except that eight blast devices 3 are respectively provided on both sides of the ignition and holding furnace 2. The eight blast devices 3 are evenly distributed along the running direction of the sintering trolley 1. A heat storage device 4 is provided on the air outlet side of each blast device 3. Example 7
[0068] Example 6 is repeated, except that the top of the ignition and holding furnace 2 is flat. Example 8
[0069] like Figure 5 As shown, Example 6 is repeated, except that the top of the ignition and holding furnace 2 is an arc-shaped top. Example 9
[0070] Example 8 is repeated, except that the plurality of blast devices 3 on the top of the ignition and holding furnace 2 are evenly arranged in four rows along the width direction of the sintering trolley 1 . Example 10
[0071] Repeat Example 9, except that along the running direction of the sintering trolley 1, the device further includes a sintering mixture distributor 6 and a biomass solid fuel distributor 7 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition and holding furnace 2. Example 11
[0072] Example 10 was repeated, except that the sintered mixture distributor 6 and the biomass solid fuel distributor 7 were both nine-roller distributors. Example 12
[0073] Example 11 was repeated, except that the apparatus further included a pure oxygen injection device 8 positioned to the side of the ignition and holding furnace 2. The pure oxygen injection device 8 comprised a pure oxygen pipeline 801 and a pure oxygen nozzle 802. The pure oxygen pipeline 801 was positioned outside the ignition and holding furnace 2. One end of the pure oxygen nozzle 802 was connected to the pure oxygen pipeline 801, and the other end extended through the side wall of the ignition and holding furnace 2 into the interior of the furnace. Example 13
[0074] Example 12 is repeated, except that eight pure oxygen blowing devices 8 are respectively provided on both sides of the ignition and holding furnace 2 . The eight pure oxygen blowing devices 8 are evenly distributed along the running direction of the sintering trolley 1 .
[0075] In this embodiment, the working principle of the heat storage chamber blast-type iron ore sintering zero-carbon ignition and heat preservation device is as follows: first, the sintering mixture is evenly distributed on the sintering trolley 1 using the sintering mixture distributor 6. After the distribution is completed, the solid fuel made of biomass is sprayed on the surface of the sintering mixture through the biomass solid fuel distributor 7, so that the surface of the sintering mixture is covered with a layer of biomass solid fuel, thereby significantly reducing the ignition temperature of the surface. Then, the heat storage device 4 is used to perform electric ignition sintering on the sintering surface. During the process of igniting and sintering the sintering surface, the pure oxygen blowing device 8 is simultaneously used to blow pure oxygen into the furnace of the ignition and heat preservation furnace 2. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the sintering surface to be ignited to form a combustion zone.
[0076] Moreover, in the process of the heat storage device 4 providing a high-temperature atmosphere for the sintering material surface for electric ignition, the blower device 3 also drives the blower shaft 303 and the blower blades 304 arranged on the blower shaft 303 to rotate through the blower motor 302, thereby sucking air from the top of the ignition and insulation furnace 2 and the outside of the furnace side into the furnace. Since the heat storage device 4 is located on the air outlet side of the blower device 3, the air is heated by the heat storage device 4 while being sucked into the furnace, and finally the purpose of air entering the furnace for ignition is achieved, that is, hot air ignition is introduced on the basis of the electric ignition of the sintering material surface by the heat storage device 4, thereby further enhancing the ignition uniformity of the sintering material surface and strengthening the effect of ignition and sintering.
Claims
1. A regenerator blast-type iron ore sintering zero-carbon ignition and heat preservation device, characterized by: The device comprises a sintering trolley (1), an ignition and heat preservation furnace (2) arranged above the sintering trolley (1), an air blowing device (3) and a heat storage device (4) arranged on the top of the ignition and heat preservation furnace (2); the air blowing device (3) comprises a fan frame (301), a fan motor (302), a fan shaft (303) and a fan blade (304); wherein the fan frame (301) is installed on the top of the ignition and heat preservation furnace (2); the fan motor (302) is arranged at the top center of the fan frame (301); the fan shaft (303) is installed on the top of the fan blade (304); ) is arranged in a fan frame (301) and connected to a fan motor (302); the fan blades (304) are installed on the fan shaft (303); the heat storage device (4) includes a heat storage chamber (401), heat storage balls (402), and a heating resistance wire (403); wherein the heat storage chamber (401) is installed on the top of the ignition and insulation furnace (2) and is located on the air outlet side of the blast device (3); the heat storage balls (402) are stacked in the heat storage chamber (401); and the heating resistance wire (403) is installed on the inner wall of the heat storage chamber (401).
2. The device according to claim 1, characterized in that: An air blast device (3) and a heat storage device (4) are also provided on the furnace side of the ignition and heat preservation furnace (2); wherein the air blast device (3) is installed outside the side wall of the ignition and heat preservation furnace (2), and the heat storage device (4) is installed on the side wall of the ignition and heat preservation furnace (2) and is located on the air outlet side of the air blast device (3).
3. The device according to claim 2, characterized in that: The device further comprises a furnace lining internal conductive device (5); the furnace lining internal conductive device (5) comprises a power supply element (501), a furnace top conductive member (502) connected to the power supply element (501), and a furnace side conductive member (503); wherein the power supply element (501) is arranged outside the ignition and heat preservation furnace (2); the furnace top conductive member (502) is buried in the furnace lining and connected to a heat storage device (4) arranged on the furnace top; and the furnace side conductive member (503) is buried in the furnace lining and connected to the heat storage device (4) arranged on the furnace side.
4. The device according to any one of claims 1 to 3, characterized in that: A plurality of fan blades (304) are connected to the fan shaft (303).
5. The device according to claim 4, characterized in that: The plurality of fan blades (304) are evenly distributed along the circumferential direction of the fan shaft (303).
6. The device according to claim 2 or 3, characterized in that: The top of the ignition and holding furnace (2) is provided with a plurality of blasting devices (3); the plurality of blasting devices (3) are evenly distributed along the running direction and width direction of the sintering trolley (1); the air outlet side of each blasting device (3) is equipped with a heat storage device (4); and / or A plurality of blast devices (3) are provided on the furnace side of the ignition and heat-insulating furnace (2); the plurality of blast devices (3) are evenly distributed along the running direction of the sintering trolley (1); and a heat storage device (4) is provided on the air outlet side of each blast device (3).
7. The device according to any one of claims 1 to 3 and 5, characterized in that: The top of the ignition and heat-insulating furnace (2) is a flat top or an arc-shaped top.
8. The device according to any one of claims 1 to 3 and 5, characterized in that: Along the running direction of the sintering trolley (1), the device further comprises a sintering mixture distributor (6) and a biomass solid fuel distributor (7) which are sequentially arranged above the sintering trolley (1) and upstream of the ignition and holding furnace (2).
9. The device according to claim 8, characterized in that: The sintered mixture distributor (6) and the biomass solid fuel distributor (7) are both nine-roller distributors.
10. The device according to any one of claims 1 to 3, 5 and 9, characterized in that: The device further comprises a pure oxygen blowing device (8) arranged on the side of the ignition and heat preservation furnace (2); the pure oxygen blowing device (8) comprises a pure oxygen pipeline (801) and a pure oxygen nozzle (802); wherein, the pure oxygen pipeline (801) is arranged outside the ignition and heat preservation furnace (2); one end of the pure oxygen nozzle (802) is connected to the pure oxygen pipeline (801), and the other end passes through the side wall of the ignition and heat preservation furnace (2) and extends into the ignition and heat preservation furnace (2).
11. The device according to claim 8, characterized in that: The device further comprises a pure oxygen blowing device (8) arranged on the side of the ignition and heat preservation furnace (2); the pure oxygen blowing device (8) comprises a pure oxygen pipeline (801) and a pure oxygen nozzle (802); wherein, the pure oxygen pipeline (801) is arranged outside the ignition and heat preservation furnace (2); one end of the pure oxygen nozzle (802) is connected to the pure oxygen pipeline (801), and the other end passes through the side wall of the ignition and heat preservation furnace (2) and extends into the ignition and heat preservation furnace (2).
12. The device according to claim 10, characterized in that: A plurality of pure oxygen blowing devices (8) are respectively provided on both sides of the ignition and holding furnace (2); the plurality of pure oxygen blowing devices (8) are evenly distributed along the running direction of the sintering trolley (1).
13. The device according to claim 11, characterized in that: A plurality of pure oxygen blowing devices (8) are respectively provided on both sides of the ignition and holding furnace (2); the plurality of pure oxygen blowing devices (8) are evenly distributed along the running direction of the sintering trolley (1).