A multi-section reinforced auxiliary sintering type ignition holding furnace and a method for using the same

Abstract

A multi-section reinforced auxiliary sintering type ignition holding furnace, comprising a sintering machine (1), an ignition device (2) and an auxiliary combustion device (3), the sintering machine (1) comprises a trolley (101), the ignition device (2) and the auxiliary combustion device (3) are sequentially arranged above the trolley (1), the auxiliary combustion device (3) comprises a hot air device (4), a blowing device (5) and an auxiliary combustion cover (6), the hot air device (4) comprises a hot air pipeline (401), the blowing device (5) comprises a gas main pipe (501), a gas branch pipe (502), a blowing pipe (503) and a support (504). A multi-section reinforced auxiliary sintering type ignition holding furnace capable of realizing the effect of sintering material layer segregation and coke distribution by replacing coke with partial gas and hot flue gas, capable of strengthening the adjustability and freedom of the blowing device, realizing multi-process and multi-medium coupling blowing, having high safety performance and good sintering quality.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ignition holding furnace and its use method, in particular to a kind of multi-section type reinforced auxiliary sintering ignition holding furnace and its use method, belong to sintering field. BACKGROUND

[0002] Sintering process is a key link in ironmaking process, its principle is to put various powdery iron-containing raw materials, appropriate amount of fuel and flux, add appropriate amount of water, after mixing and balling, a series of physical and chemical changes occur in the sintering equipment, the material is sintered into block, so as to send to blast furnace for next process.

[0003] In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, the requirement of blast furnace for sinter is often high strength and high reducibility. In the sintering process, it is generally required that the sinter has high strength, high yield, low return rate of sinter and low fuel consumption. High strength and high reducibility sinter consumes less coke in the process of blast furnace smelting, thereby reducing the emission of carbon dioxide. In the long run, carbon dioxide emission reduction requirement will become one of the bottlenecks restricting the development of steel industry. According to relevant information, the carbon dioxide emission of sintering and blast furnace process accounts for about 60% of the total industrial emission. Therefore, whether from the perspective of reducing cost or from the perspective of environmental protection, reducing the proportion of sinter solid fuel consumption and reducing the fuel ratio of blast furnace burden become the urgent need of ironmaking technology.

[0004] In the prior art, the holding ignition furnace of sintering machine has the following defects: 1. The coke ratio is too high: because the air flow of sintering machine passes through the material layer from top to bottom during production, the bottom sintering material is in the process of heat accumulation before the combustion zone reaches the bottom of the sintering material layer. Thus we can analyze that the closer to the bottom, the less coke proportion the sintering material needs to be mixed (because the heat accumulation is sufficient). In other words, the reasonable coke proportion in the sintering material should gradually decrease from top to bottom. However, in actual production, due to the lack of feasible segregation coke distribution means and devices, it is necessary to distribute the same proportion of coke in the upper and lower material layers, which not only wastes the amount of coke and increases unnecessary energy consumption, but also causes the quality of the bottom material layer to deteriorate due to the excessive temperature. 2. Large CO2 emission: because the amount of coke mixed under the existing technology is much larger than the actual reasonable amount of coke needed during production, the amount of CO2 generated during combustion is also greatly increased. 3. The quality of sinter cannot be effectively guaranteed: because the amount of coke mixed at the bottom of the sintering material layer is much larger than the actual reasonable amount of coke needed during production, the temperature is too high during production, which generates glassy silicate that is harmful to the quality of sinter, and has a negative impact on the strength, reducibility and low temperature reduction of the finished sinter.

[0005] Under this background, the "sinter material surface gas fuel injection technology" developed by JFE company in Japan emerged as the times require. Its principle is to inject gas fuel diluted below the lower limit of flammable concentration above the sinter material surface at a distance behind the ignition furnace, so that it burns in the sinter material layer to provide heat, thereby reducing the solid carbon consumption and CO2 emission in sinter production. At the same time, because the combustion of gas fuel widens the high temperature band width of sinter material layer during production, the sinter temperature time of 1200-1400℃ is prolonged, so that the strength and 5-10mm porosity of sinter are effectively strengthened. At present, this technology has good energy saving, emission reduction and quality improvement effect.

[0006] The sintering machine with the injection device in the prior art has the following disadvantages:

[0007] 1. Low degree of freedom: the device is a fixed structure in height and length (along the running direction of the sintering machine), and the installation position of the device (distance from the tail end of the ignition furnace) cannot be changed. If the working condition changes, free adjustment cannot be realized.

[0008] 2. Poor adaptability: due to the low degree of freedom, the injection device can only adapt to a single working condition, and cannot adapt to some sintering plants with frequent replacement of material types or frequent changes of machine speed.

[0009] 3. Short service life: since the injection device cannot change the height, and the material surface height changes in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface is difficult to ensure within a reasonable range during actual production. Once the distance is too close, the injection pipe is easily burned by the high-temperature material surface.

[0010] 4. Low safety performance: since the injection device cannot change the height, and the material surface height changes in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface is difficult to ensure within a reasonable range during actual production. Once the distance between the lower edge of the device injection pipe and the material surface is too close, the gas fuel may burn in the injection pipe, causing safety accidents.

[0011] 5. High maintenance cost: since the injection device cannot change the height, and the material surface height changes in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface is difficult to ensure within a reasonable range during actual production. Since the injection pipe is easily burned by the high-temperature material surface, the production enterprise has to frequently replace the injection pipe, thereby greatly increasing the maintenance cost.

[0012] 6. Cannot realize multi-process and multi-medium coupled injection: the injection device in the prior art can only be used for single medium injection of gas, such as natural gas or coke oven gas, and the device cannot be coupled with other sintering auxiliary processes that need to be installed in the same position, such as hot blast sintering.

[0013] 7. The device is not safe: the existing technology of the injection device does not have a sealing means, so when the sintering flue appears negative pressure due to some reasons, the gas injected into the material surface is not enough to be sucked into the material layer, which will overflow to the both sides of the sintering machine, causing personal injury to the operator.

[0014] 8. The sintering quality of part of the sinter is not high: in order to ensure that the gas does not burn out of the material surface when burning in the material layer to cause safety accidents, generally, the gas is injected after 90s of ignition, or when the sintering material layer combustion zone moves down about 80mm. But this causes the 80mm thick sintering material above the combustion zone to have low sintering quality and poor effect, and the overall yield is reduced. SUMMARY

[0015] In view of the shortcomings of the traditional sintering machine technology, we have developed a multi-stage reinforced auxiliary sintering type ignition holding furnace which can replace part of the coke with gas and hot flue gas to achieve the effect of partial segregation of sintering material layer, so as to make up for the defects of the existing technology and achieve the purpose of energy saving, emission reduction and quality improvement of the sintering machine. The present application is a multi-stage reinforced auxiliary sintering type ignition holding furnace which can strengthen the adjustability and freedom of the injection device, realize multi-process and multi-medium coupled injection, has high safety performance and good sintering quality, so as to make up for the defects of the existing technology and realize efficient and safe production.

[0016] According to the first embodiment of the present application, a multi-stage reinforced auxiliary sintering type ignition holding furnace is provided:

[0017] A multi-stage reinforced auxiliary sintering type ignition holding furnace device, comprising a sintering machine, an ignition device and an auxiliary combustion device. The sintering machine comprises a trolley, and the ignition device and the auxiliary combustion device are arranged in sequence above the trolley in the running direction of the trolley. The auxiliary combustion device comprises a hot air device, an injection device and an auxiliary combustion hood. The hot air device and the injection device are arranged on the auxiliary combustion hood. The hot air device comprises a hot air pipeline. The hot air pipeline extends into or leads to the auxiliary combustion hood. The injection device comprises a gas main pipe, a gas branch pipe, an injection pipe and a bracket. The gas main pipe is arranged outside the auxiliary combustion hood. The gas branch pipe is connected to the gas main pipe at one end and to the injection pipe at the other end. The gas branch pipe extends into the auxiliary combustion hood. The injection pipe is arranged on the bracket. The bracket is located in the auxiliary combustion hood and above the trolley. For example, the bracket is directly or indirectly mounted on the side wall of the auxiliary combustion hood.

[0018] Wherein along the running direction of the trolley, the length of the auxiliary combustion hood is 10-40 meters, preferably 12-35 meters, preferably 15-30 meters.

[0019] As a preferred, the inner space of the auxiliary combustion cover is also provided with a flow regulation device. The flow regulation device is located above the blowing pipe of the blowing device but below the air outlet of the hot air pipe of the hot air device.

[0020] Preferably, the flow regulation device is one or both of a flow regulation plate and a flow regulation hole.

[0021] As a preferred, the gas branch pipe is provided with a metal hose. The metal hose is arranged at the connection position of the gas branch pipe and the auxiliary combustion cover.

[0022] As a preferred, the side wall of the auxiliary combustion cover is also provided with one or more positioning holes. Preferably, a plurality of positioning holes are arranged in a grid shape on the side walls of the two sides of the auxiliary combustion cover. The bracket is placed on or supported by the positioning holes.

[0023] Preferably, the ignition heat preservation furnace device further comprises a positioning bolt. The positioning bolt connects the positioning hole and the bracket.

[0024] As a preferred, the side wall of the auxiliary combustion cover is provided with 1-20 positioning holes in the vertical direction, preferably 2-10 positioning holes, and more preferably 3-5 positioning holes.

[0025] As a preferred, the side wall of the auxiliary combustion cover is provided with 1-20 positioning holes in the horizontal direction, preferably 2-10 positioning holes, and more preferably 3-5 positioning holes.

[0026] As a preferred, the ignition heat preservation furnace device further comprises a sealing device. The sealing device comprises a sealing plate and a sealing groove. The sealing plate is arranged on the side wall of the auxiliary combustion cover. The sealing groove is arranged on the side plate of the trolley.

[0027] Preferably, the sealing device adopts one or more of liquid sealing, sand sealing or elastic sheet sealing.

[0028] As a preferred, the ignition heat preservation furnace device further comprises a heat preservation and heating device. The heat preservation and heating device is arranged at the front end of the auxiliary combustion device and at the top of the auxiliary combustion cover. The heat preservation and heating device comprises a gas inlet, an air inlet and a mixed flow injection pipe.

[0029] Preferably, the ignition heat preservation furnace device is provided with 1-20 heat preservation and heating devices, preferably 2-8 heat preservation and heating devices, and more preferably 3-6 heat preservation and heating devices.

[0030] As a preferred, the side of the ignition device is provided with an ignition device peep door. For example, the side of the ignition device is provided with 1-10 ignition device peep doors, preferably 2-8 ignition device peep doors, and more preferably 3-6 ignition device peep doors.

[0031] As a preference, the side of the auxiliary combustion hood is provided with auxiliary combustion device peep doors. For example, the side of the auxiliary combustion hood is provided with 1-8 auxiliary combustion device peep doors, preferably 2-6 auxiliary combustion device peep doors, and more preferably 3-5 auxiliary combustion device peep doors.

[0032] As a preference, the ignition holding furnace device is also provided with a purging medium (such as nitrogen or air) pipeline. The purging medium pipeline is connected to the gas branch pipeline.

[0033] As a preference, the purging medium pipeline is provided with a purging medium (such as nitrogen or air) pipeline flow control valve.

[0034] As a preference, the injection pipe is a multi-section (for example, 2 sections or more than 2 sections, for example, 3 sections or 4 sections) injection sleeve. The multi-section injection sleeve is a telescopic sleeve structure. Each section of the injection sleeve is provided with an injection hole.

[0035] As a preference, the injection pipe is a multi-section (for example, 2 sections or more than 2 sections, for example, 3 sections or 4 sections) injection sleeve. The multi-section injection sleeve is a telescopic sleeve structure. Each section of the injection sleeve is provided with an injection hole.

[0036] As a preference, one side of the gas main pipeline is connected to the gas branch pipeline.

[0037] As a preference, the gas main pipeline is provided with 1-15 gas branch pipelines, preferably 2-10 gas branch pipelines, and more preferably 3-8 gas branch pipelines.

[0038] As a preference, one side or both sides of the gas branch pipeline in the horizontal direction is provided with an injection pipe.

[0039] As a preference, each gas branch pipeline is provided with 1-20 injection pipes, preferably 2-15 injection pipes, and more preferably 3-10 injection pipes.

[0040] As a preference, the gas main pipeline is provided with a main pipeline flow adjusting device.

[0041] As a preference, the gas main pipeline is provided with a main pipeline flow detecting device.

[0042] As a preference, the gas branch pipeline is provided with a branch pipeline flow adjusting device.

[0043] As a preference, the gas branch pipeline is provided with a branch pipeline flow detecting device.

[0044] As a preference, the front end of the ignition device is also provided with a material surface detecting device.

[0045] As preferred, the device further comprises a control system. The control system is connected with the ignition device, the heat supplement device, the material surface height detecting device, the blowing medium pipeline flow control valve, the main pipeline flow adjusting device, the main pipeline flow detecting device, the branch pipeline flow adjusting device and the branch pipeline flow detecting device. The control system controls the operation of the ignition device, the heat supplement device, the material surface height detecting device, the blowing medium pipeline flow control valve, the main pipeline flow adjusting device, the main pipeline flow detecting device, the branch pipeline flow adjusting device and the branch pipeline flow detecting device.

[0046] Preferably, H2 and CO detecting and alarming devices are installed on the top of the auxiliary combustion hood 6.

[0047] According to the second embodiment of the present application, a use method of the multi-stage reinforced auxiliary sintering type ignition and heat preservation furnace is provided.

[0048] A use method of the multi-stage reinforced auxiliary sintering type ignition and heat preservation furnace device, the method comprising the following steps:

[0049] (1) According to the needs of the sintering material, the number of the blowing pipe is set; the positioning hole of the vertical direction of the side wall of the auxiliary combustion hood is selected, and the position of the blowing device is set;

[0050] (2) The sintering machine trolley is laid and ignited to run, and the material surface height detecting device detects the material surface height; the positioning hole of the horizontal direction of the side wall of the auxiliary combustion hood is selected, and the height of the blowing device is adjusted;

[0051] (3) Optionally or as needed, the control system controls the heat supplement device;

[0052] (4) The fuel is fed, and the blowing of the fuel is started;

[0053] (5) The main pipeline flow detecting device detects the flow size, the control system controls the main pipeline flow adjusting device, the branch pipeline flow detecting device detects the flow size, and the control system controls the main pipeline flow adjusting device.

[0054] In the present application, "optionally" means to perform or not to perform.

[0055] In the present application, the gas blowing device is organically combined with the auxiliary combustion hood.

[0056] In the present application, the air outlet of the hot air device is arranged above the blowing pipe of the blowing device. The present application does not have requirements for the position and size of the hot air conveying pipeline, which can be set according to actual needs, as long as the air outlet is arranged in the auxiliary combustion hood. The gas main pipe and the gas branch pipe of the blowing device can be installed on the side of the sintering machine, the side of the auxiliary combustion hood or the top of the auxiliary combustion hood (which can be the inner top or the outer top). The present application does not have requirements for the size of the gas main pipe and the gas branch pipe, which can be set according to actual needs. In the present application, the air outlet and the blowing pipe of the hot air device are arranged in the auxiliary sintering hood.

[0057] In the present application, a flow regulating device is additionally arranged inside the auxiliary sintering hood, which is used to regulate the hot air flowing into the upper part of the auxiliary sintering hood uniformly, so as to make it a stable combustion-supporting medium, and will not affect the diffusion of the gas medium sprayed by the blowing pipe in the lower part of the auxiliary sintering hood. The present application does not have requirements for the flow regulating device, which can have various forms, such as flow regulating holes, flow regulating plates and the like.

[0058] In the present application, the position adjustment of the blowing device is realized by the positioning hole. The positioning hole, the positioning bolt and the bracket are composed. The positioning hole is arranged on the side plates of the auxiliary sintering hood, and N (N>2, which can be adjusted according to actual conditions) positioning holes can be arranged from low to high. The bracket is responsible for bearing the blowing pipe and can drive the blowing pipe to move up and down. The two ends of the bracket are respectively inserted into the positioning holes on the two sides of the auxiliary sintering hood, and are fastened by the positioning bolt. The positioning hole of the present application is arranged on the side wall of the auxiliary combustion hood, and can be arranged in the vertical direction and the horizontal direction. The positioning hole in the vertical direction adjusts the height of the blowing pipe, and the positioning hole in the horizontal direction adjusts the front and back distance of the blowing pipe, that is, the distance between the blowing pipe and the ignition furnace. The number of positioning holes is not limited, and the arrangement of positioning holes can be any shape, which is not limited and can be set according to actual needs.

[0059] In the present application, the ignition and heat preservation furnace device is also provided with a blowing medium (such as nitrogen or air) pipeline. The blowing medium pipeline is connected to the gas branch pipe. The blowing medium pipeline is provided with a blowing medium (such as nitrogen or air) pipeline flow control valve, which can be opened or closed according to needs.

[0060] In the present application, the sealing device is composed of a sealing plate and a sealing groove. The sealing plate is fixed on the side plates on both sides of the auxiliary sintering hood and is stationary during production. The sealing groove is fixed on the side plate of the sintering machine trolley and moves with the trolley during production. The sealing plate and the sealing groove can adopt various sealing methods, such as liquid sealing, sand sealing or bullet sealing and the like. The present application does not have requirements for the sealing method.

[0061] In the present application, the heat preservation and heating device is added in the middle position after the ignition section and before the blowing pipe, which is composed of the gas inlet pipe, the air inlet pipe and the mixed flow outlet pipe. The heat preservation and heating device is vertically installed on the top of the auxiliary sintering cover, and the purpose is to supplement the heat for the 80mm-thick sintering material above the burning zone after the proportioning of the burden, so as to ensure the sintering quality. The transverse arrangement number of the heat preservation and heating device can be different according to the different widths of the sintering machine trolley, and the longitudinal arrangement number can be different according to the different distances between the ignition section and the blowing pipe. The present application does not have requirements for the installation position of the heat preservation and heating device, and can be set according to the actual needs. In addition, in order to facilitate observation, the side parts of the ignition section and the auxiliary sintering section are provided with peep doors.

[0062] In the present application, the bracket is arranged on the positioning hole of the auxiliary combustion cover, that is, the bracket is arranged above the sintering machine trolley and parallel to the running direction of the trolley. The bracket can be a steel bracket or a bracket made of other materials, and any hard material that can withstand high temperature can be used. The bracket is used to make the blowing pipe. The structure of the bracket can be any shape, and a reinforcing rib can be arranged in the middle of the bracket for reinforcing the bracket.

[0063] In the present application, a section of metal hose is arranged on the fuel branch pipe, which can deform up and down and left and right within a certain range, and can ensure the normal delivery of fuel. The blowing pipe is connected with and communicated with the fuel branch pipe, and the fuel enters the blowing pipe from the fuel branch pipe. The blowing pipe is arranged on the bracket, and can be fixedly arranged or movably arranged.

[0064] In the present invention, the injection pipe is an injection sleeve. The injection pipe is a 2-section or more injection sleeve, preferably a 2-10 section injection sleeve, more preferably a 3-8 section injection sleeve. Each section of the injection sleeve is provided with injection holes. According to the need, the multi-section injection sleeve can be contracted to the length of one section, and after contraction, the injection holes on each section overlap in a straight line. According to the need, the multi-section injection sleeve can be extended to the length of 2 sections or more, and each section is connected with the adjacent next section. For example, the injection sleeve is 3 sections, wherein the first section (the section connected with the fuel branch pipe) has the largest diameter and the first section is connected at the head end with the fuel branch pipe, the second section is smaller, and the third section is the smallest. When only 1 section length injection is needed, the second section and the third section are both sleeved in the first section, and the injection holes on each section overlap in a straight line. When the injection length needs to be extended, the second section and / or the third section extends out of the first section, the head end of the second section is connected with the tail end of the first section, the head end of the third section is connected with the tail end of the second section, and participates in the injection. It can also be that the first section (the section connected with the fuel branch pipe) has the smallest diameter and the first section is connected at the head end with the fuel branch pipe, the second section is larger than the first section, and the third section is the largest. When only 1 section length injection is needed, the second section and the third section are both sleeved out of the first section, and the injection holes on each section overlap in a straight line. When the injection length needs to be extended, the second section and / or the third section extends out of the first section, the head end of the second section is connected with the tail end of the first section, the head end of the third section is connected with the tail end of the second section, and participates in the injection. The maximum inner diameter of the injection sleeve is 60 mm. The minimum inner diameter is 10 mm. That is, the inner diameter of the injection sleeve is 10-60 mm, preferably 15-50 mm. After all the sections of the injection sleeve are extended, the length of the entire injection pipe is less than or equal to the gap width between the adjacent fuel branch pipes.

[0065] In the present invention, the fuel delivery pipe is provided with fuel branch pipes on one side. The gap between the adjacent fuel branch pipes is 2-8 meters, and the entire device is provided with 1-24 fuel branch pipes, preferably 2-18 fuel branch pipes, more preferably 4-12 fuel branch pipes.

[0066] In the present invention, the fuel branch pipe is provided with an injection pipe on one side or both sides. The gap between the adjacent injection pipes is 100-200 mm. Each fuel branch pipe is provided with 6-20 injection pipes. The length of the injection pipe is 2-7 meters.

[0067] H2, CO detection and alarm device is installed on the top of the auxiliary combustion hood 6. Once the large flue negative pressure is insufficient, the surface of the material layer does not have enough negative pressure to suck the gas & air & flue gas mixture in the hood into the material, at this time the gas cannot overflow from both sides due to the sealing device 7 arranged on both sides of the hood, and can only overflow from the top of the auxiliary combustion hood 6. The H2, CO detection and alarm device installed on the top of the auxiliary combustion hood 6 can detect. If H2 or CO is detected to be excessive, it indicates that the large flue negative pressure is insufficient at this time, and the operator should be prompted to increase the opening degree of the bottom air door. Generally, the detected H2 or CO concentration should be set to three levels: 1st level alarm, 2nd level emergency alarm, and 3rd level cut off the gas main valve.

[0068] When using the ignition furnace of the present application for sintering production: the sintering material layer loaded on the trolley first enters the ignition section, and the internal coke is ignited to form a combustion zone under the action of the ignition burner. Then the trolley continues to move forward, and at the same time the combustion zone slowly moves down due to the action of the large flue negative pressure. Subsequently, the trolley enters the auxiliary sintering section, and the sintering material layer is first heated by the flame blown by the heat supplementing device. When the combustion zone moves down to a position about 80mm away from the surface layer of the sintering material surface, the trolley enters below the blowing device, and the gas is uniformly blown to the sintering material surface through the blowing pipe. At the same time, the hot air blown from the hot air pipeline above the auxiliary sintering hood is mixed with the gas medium blown by the blowing pipe above the sintering material surface, and is sucked into the sintering material layer together. When the gas medium meets the combustion zone, it is ignited, achieving the effect of auxiliary sintering and improving the sintering quality.

[0069] Compared with the prior art, the present application has the following beneficial technical effects:

[0070] 1. High degree of freedom of the device: due to the addition of the lifting device (achieved through the positioning hole), if the working conditions change during production, the operator can adjust the height of the change blowing pipe according to the actual conditions, thereby ensuring the effect of auxiliary sintering and improving the safety factor; it can adapt to some sintering plants with frequent replacement of material types or frequent changes in machine speed.

[0071] 2. Multiple process and multiple medium coupling blowing is realized: for the first time, the gas blowing technology is combined with the hot air sintering technology, and the hot air and the gas are mixed in the auxiliary sintering hood and are sucked into the sintering material layer together. Not only can it improve the adaptability of the device, but also it is beneficial to reduce the energy consumption index;

[0072] 3. High safety performance of the device: due to the addition of the sealing device, when the sintering large flue has insufficient negative pressure due to some reason, and the gas blown to the material surface is not sucked into the material layer due to insufficient negative pressure, the gas medium in the auxiliary sintering hood will not overflow to the operation platform to cause personnel injury, but will overflow from above the auxiliary sintering hood 71. At this time, the CO (H2) detection alarm instrument arranged above the auxiliary sintering hood will alarm the main control room and remind the operator to handle it.

[0073] 4. High overall finished product rate of sinter: because the heat preservation and heating device is additionally arranged between the ignition section and the injection pipe, the sintering material 80mm above the sintering material layer will not have quality reduction due to insufficient heating, thereby improving the overall finished product rate.

[0074] 5. Long service life: because the injection device can change the height, and the material surface height is changed in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface can be ensured within a reasonable range in actual production, and once the distance is too close, it can be adjusted in time.

[0075] 6. High safety performance: because the injection device can change the height, and the material surface height is changed in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface can be ensured within a reasonable range in actual production, and once the distance is too close, it can be adjusted in time.

[0076] 7. Low maintenance cost: because the injection device can change the height, and the material surface height is changed in real time according to the working condition factors, the distance between the lower edge of the device injection pipe and the upper edge of the material surface can be easily ensured within a reasonable range in actual production, avoiding that the injection pipe is easily burned by the high-temperature material surface, so that the production enterprise does not need to frequently replace the injection pipe, thereby greatly reducing the maintenance cost.

[0077] 8. High safety of the device: because the injection device in the prior art does not have a sealing means, when the sintering large flue has insufficient negative pressure due to some reasons, the fuel gas injected into the material surface is not sucked into the material layer with sufficient negative pressure, and will overflow to the platforms on both sides of the sintering machine, causing personal injury to the operators. The sealing device can well solve this problem. BRIEF DESCRIPTION OF DRAWINGS

[0078] Figure 1 is the structural diagram of the device of the present application;

[0079] Figure 2 is the sectional view of the auxiliary combustion device of the present application;

[0080] Figure 3 is the plan view of the device of the present application;

[0081] Figure 4 is the front view of the rectifying device of the present application, which is a rectifying plate;

[0082] Figure 5 is the plan view of the rectifying device of the present application, which is a rectifying plate;

[0083] Figure 6 is the front view of the rectifying device of the present application, which is a rectifying hole;

[0084] Figure 7 Figure 1 is a plan view of the rectifying hole of the rectifying device of the present application;

[0085] Figure 8 Figure 1 is a plan view of the rectifying hole of the rectifying device of the present application;

[0086] Figure 9 Figure 1 is a plan view of the rectifying hole of the rectifying device of the present application;

[0087] Figure 10 Figure 1 is a plan view of the rectifying hole of the rectifying device of the present application;

[0088] Reference signs:

[0089] 1: sintering machine; 101: trolley; 2: ignition device; 201: ignition device peep door; 3: auxiliary combustion device; 4: hot air device; 401: hot air pipeline; 5: injection device; 501: gas main pipe; 50101: main pipe flow adjusting device; 50102: main pipe flow detecting device; 502: gas branch pipe; 50201: branch pipe flow adjusting device; 50202: branch pipe flow detecting device; 50203: metal hose; 503: injection pipe; 504: support; 505: injection hole; 6: auxiliary combustion cover; 601: rectifying device; 602: positioning hole; 603: positioning bolt; 604: auxiliary combustion device peep door; 7: sealing device; 701: sealing plate; 702: sealing groove; 8: heat preservation and heating device; 801: gas inlet; 802: air inlet; 803: mixed flow injection pipe; 9: purging medium pipeline; 901: purging medium pipeline flow control valve; 10: material surface detecting device; 11: control system. DETAILED DESCRIPTION

[0090] According to the first embodiment of the present application, a multi-section reinforced auxiliary sintering type ignition heat preservation furnace is provided.

[0091] The application discloses a multi-section reinforced auxiliary sintering ignition holding furnace device, which comprises a sintering machine 1, an ignition device 2 and an auxiliary combustion device 3. The sintering machine 1 comprises a trolley 101, and the ignition device 2 and the auxiliary combustion device 3 are sequentially arranged above the trolley 101 along the running direction of the trolley 101. The auxiliary combustion device 3 comprises a hot air device 4, a blowing device 5 and an auxiliary combustion cover 6. The hot air device 4 and the blowing device 5 are arranged on the auxiliary combustion cover 6. The hot air device 4 comprises a hot air pipeline 401. The hot air pipeline 401 extends into or leads to the auxiliary combustion cover 6. The blowing device 5 comprises a gas main pipe 501, a gas branch pipe 502, a blowing pipe 503 and a bracket 504. The gas main pipe 501 is arranged outside the auxiliary combustion cover 6. The gas branch pipe 502 is connected with the gas main pipe 501 at one end and connected with the blowing pipe 503 at the other end. The gas branch pipe 502 extends into the auxiliary combustion cover 6. The blowing pipe 503 is arranged on the bracket 504. The bracket 504 is located in the auxiliary combustion cover 6 and above the trolley 101. For example, the bracket is directly or indirectly mounted on the side walls on both sides of the auxiliary combustion cover 6.

[0092] Preferably, the internal space of the auxiliary combustion cover 6 is further provided with a flow regulation device 601. The flow regulation device 601 is located above the blowing pipe 503 of the blowing device 5 but below the air outlet of the hot air pipeline 401 of the hot air device 4.

[0093] Preferably, the flow regulation device 601 is one or both of a flow regulation plate and a flow regulation hole.

[0094] Preferably, the gas branch pipe 502 is provided with a metal hose 50203. The metal hose 50203 is arranged at the connecting position of the gas branch pipe 502 and the auxiliary combustion cover 6.

[0095] Preferably, the side wall of the auxiliary combustion cover 6 is further provided with a positioning hole 602. The bracket 504 is placed on the positioning hole 602.

[0096] Preferably, the ignition holding furnace device further comprises a positioning bolt 603. The positioning bolt 603 is connected with the positioning hole 602 and the bracket 504.

[0097] Preferably, the side wall of the auxiliary combustion cover 6 is provided with 1-20 positioning holes 602 in the vertical direction, preferably 2-10 positioning holes 602, and more preferably 3-5 positioning holes 602.

[0098] Preferably, the side wall of the auxiliary combustion cover 6 is provided with 1-20 positioning holes 602 in the horizontal direction, preferably 2-10 positioning holes 602, and more preferably 3-5 positioning holes 602.

[0099] As preferred, the ignition holding furnace device further comprises a sealing device 7. The sealing device 7 comprises a sealing plate 701 and a sealing groove 702. The sealing plate 701 is arranged on the sidewall of the auxiliary combustion hood 6. The sealing groove 702 is arranged on the side plate of the trolley 101.

[0100] Preferably, the sealing device 7 adopts one or more of liquid sealing, sand sealing or sheet sealing.

[0101] As preferred, the ignition holding furnace device further comprises a holding heating device 8. The holding heating device 8 is arranged at the front end of the auxiliary combustion device 3 and at the top of the auxiliary combustion hood 6. The holding heating device 8 comprises a gas inlet 801, an air inlet 802 and a mixed flow ejection pipe 803.

[0102] Preferably, the ignition holding furnace device is provided with 1-10 holding heating devices 8, preferably 2-8 holding heating devices 8, and more preferably 3-5 holding heating devices 8.

[0103] As preferred, the side of the ignition device 2 is provided with an ignition device peep door 201. For example, the side of the ignition device 2 is provided with 1-10 ignition device peep doors 201, preferably 2-8 ignition device peep doors 201, and more preferably 3-6 ignition device peep doors 201.

[0104] As preferred, the side of the auxiliary combustion hood 6 is provided with an auxiliary combustion device peep door 604. For example, the side of the auxiliary combustion hood 6 is provided with 1-8 auxiliary combustion device peep doors 604, preferably 2-6 auxiliary combustion device peep doors 604, and more preferably 3-5 auxiliary combustion device peep doors 604.

[0105] As preferred, the ignition holding furnace device is further provided with a blowing medium (such as nitrogen or air) pipeline 9. The blowing medium pipeline 9 is connected to the gas branch pipe 502.

[0106] As preferred, the blowing medium pipeline 9 is provided with a blowing medium (such as nitrogen or air) pipeline flow control valve 901.

[0107] As preferred, the blowing pipe 503 is a blowing sleeve pipe with 2 or more sections. The blowing sleeve pipe adopts a telescopic sleeve structure. The blowing sleeve pipe is provided with a blowing hole 505. Alternatively, the blowing pipe 503 is a blowing sleeve pipe with multiple sections (for example, 2 or more sections, for example, 3 or 4 sections). The blowing sleeve pipe adopts a telescopic sleeve structure. Each section of the blowing sleeve pipe is provided with a blowing hole 505.

[0108] Preferably, the blowing pipe 503 is a blowing sleeve pipe with 3 sections, and the blowing sleeve pipe adopts a telescopic sleeve structure.

[0109] As preferred, one side of the gas main pipe 501 is connected to the gas branch pipe 502.

[0110] As preferred, 1-15 gas branch pipes 502 are arranged on the gas main pipe 501, preferably 2-10 gas branch pipes 502, and more preferably 3-8 gas branch pipes 502.

[0111] As preferred, one or both sides of the gas branch pipe 502 in the horizontal direction is provided with a blowing pipe 503.

[0112] As preferred, 1-20 blowing pipes 503 are arranged on each gas branch pipe 502, preferably 2-15 blowing pipes 503, and more preferably 3-10 blowing pipes 503.

[0113] As preferred, a main pipe flow adjusting device 50101 is arranged on the gas main pipe 501.

[0114] As preferred, a main pipe flow detecting device 50102 is arranged on the gas main pipe 501.

[0115] As preferred, a branch pipe flow adjusting device 50201 is arranged on the gas branch pipe 502.

[0116] As preferred, a branch pipe flow detecting device 50202 is arranged on the gas branch pipe 502.

[0117] As preferred, the front end of the ignition device is further provided with a material surface detecting device 10.

[0118] As preferred, the device further comprises a control system 11. The control system 11 is connected with the ignition device 2, the heat preservation and heating device 8, the material surface height detecting device 10, the blowing medium pipe flow control valve 901, the main pipe flow adjusting device 50101, the main pipe flow detecting device 50102, the branch pipe flow adjusting device 50201, and the branch pipe flow detecting device 50202. The control system 11 controls the operation of the ignition device 2, the heat preservation and heating device 8, the material surface height detecting device 10, the blowing medium pipe flow control valve 901, the main pipe flow adjusting device 50101, the main pipe flow detecting device 50102, the branch pipe flow adjusting device 50201, and the branch pipe flow detecting device 50202.

[0119] According to the second embodiment of the present application, a use method of the multi-stage reinforced auxiliary sintering type ignition and heat preservation furnace is provided.

[0120] A use method of the multi-stage reinforced auxiliary sintering type ignition and heat preservation furnace device, the method comprising the following steps:

[0121] (1) According to the need of the sintering material, the number of blowing pipes 503 is set; the positioning hole 602 of the support 504 in the vertical direction of the side wall of the auxiliary combustion cover 6 is selected, and the position of the blowing device 5 is set;

[0122] (2) Sintering machine trolley 101 cloth and ignition operation, material surface height detection device 10 detects the material surface height; select the support 504 auxiliary combustion hood 6 side wall of the horizontal direction of the positioning hole 602, adjust the height of the blowing device 5;

[0123] (3) optionally or as needed, control system control heat preservation and heating device 8;

[0124] (4) into the fuel, start blowing fuel;

[0125] (5) the total pipe flow detection device 50102 detects the size of the flow, the control system 11 controls the total pipe flow regulating device 50101, branch pipe flow detection device 50202 detects the size of the flow, the control system 11 controls the total pipe flow regulating device 50201.

[0126] By installing H2, CO detection and alarm equipment on the top of the auxiliary combustion hood 6. Once the large flue negative pressure is insufficient, the material layer surface has not enough negative pressure to suck the gas & air & flue gas mixture in the hood into the material, at this time the gas can not overflow from both sides because the hood is equipped with sealing device 7 on both sides, and can only overflow from the top of the hood. The H2, CO detection and alarm equipment installed on the top of the auxiliary combustion hood 6 can detect it. If H2 or CO is detected to exceed the standard, it means that the large flue negative pressure is insufficient at this time, and the operator should be prompted to increase the bottom damper opening. Generally speaking, the detected H2 or CO concentration should be set to three levels: 1st level alarm, 2nd level emergency alarm, 3rd level cut off the gas main valve.

[0127] Example 1

[0128] A multi-section reinforced auxiliary sintering type ignition holding furnace device, comprising a sintering machine 1, an ignition device 2 and an auxiliary combustion device 3. The sintering machine 1 comprises a trolley 101, and along the running direction of the trolley 101, the ignition device 2 and the auxiliary combustion device 3 are arranged in sequence above the trolley 101. The auxiliary combustion device 3 comprises a hot air device 4, a blowing device 5 and an auxiliary combustion cover 6. The hot air device 4 and the blowing device 5 are arranged on the auxiliary combustion cover 6. The hot air device 4 comprises a hot air pipeline 401. The hot air pipeline 401 extends into or leads to the auxiliary combustion cover 6. The blowing device 5 comprises a gas main pipe 501, a gas branch pipe 502, a blowing pipe 503 and a bracket 504. The gas main pipe 501 is arranged outside the auxiliary combustion cover 6. The gas branch pipe 502 is connected to the gas main pipe 501 at one end and connected to the blowing pipe 503 at the other end. The gas branch pipe 502 extends into the auxiliary combustion cover 6. The blowing pipe 503 is arranged on the bracket 504. The bracket 504 is directly or indirectly mounted on the side wall of the auxiliary combustion cover 6. The blowing pipe 503 is a 3-section blowing sleeve, and the 3-section blowing sleeve is a telescopic sleeve structure. The blowing sleeve is provided with blowing holes 505. The gas main pipe 501 is provided with 10 gas branch pipes 502. Each gas branch pipe 502 is provided with 10 blowing pipes 503 on one side. The gas main pipe 501 is provided with a main pipe flow adjusting device 50101. The gas main pipe 501 is provided with a main pipe flow detection device 50102. The gas branch pipe 502 is provided with a branch pipe flow adjusting device 50201. The gas branch pipe 502 is provided with a branch pipe flow detection device 50202.

[0129] Example 2

[0130] Example 1 is repeated, except that the internal space of the auxiliary combustion cover 6 is also provided with a flow regulating device 601. The flow regulating device 601 is located above the blowing pipe 503 of the blowing device 5 but below the air outlet of the hot air pipeline 401 of the hot air device 4. The flow regulating device 601 is a flow regulating plate.

[0131] Example 3

[0132] Example 2 is repeated, except that the flow regulating device 601 is a flow regulating hole.

[0133] Example 4

[0134] Example 2 is repeated, except that the gas branch pipe 502 is provided with a section of metal hose 50203. The metal hose 50203 is arranged at the connection position of the gas branch pipe 502 and the auxiliary combustion cover 6.

[0135] Example 5

[0136] Example 6 is repeated except that the side wall of the auxiliary combustion hood 6 is further provided with positioning holes 602. The support 504 is placed on the positioning holes 602. The ignition heat preservation furnace device further comprises positioning bolts 603. The positioning bolts 603 connect the positioning holes 602 and the support 504. There are 3 positioning holes in the vertical direction of the side wall of the auxiliary combustion hood 6. There are 4 positioning holes 602 in the horizontal direction of the side wall of the auxiliary combustion hood 6.

[0137] Example 6

[0138] Example 5 is repeated except that the ignition heat preservation furnace device further comprises a sealing device 7. The sealing device 7 comprises a sealing plate 701 and a sealing groove 702. The sealing plate 701 is arranged on the side wall of the auxiliary combustion hood 6. The sealing groove 702 is arranged on the side plate of the trolley 101. The sealing device 7 adopts liquid sealing.

[0139] Example 7

[0140] Example 6 is repeated except that the sealing device 7 adopts sand sealing.

[0141] Example 8

[0142] Example 6 is repeated except that the sealing device 7 adopts elastic piece sealing.

[0143] Example 9

[0144] Example 9 is repeated except that the ignition heat preservation furnace device further comprises 3 heat preservation and heating devices 8. The heat preservation and heating devices 8 are arranged at the front end of the auxiliary combustion device 3 and at the top of the auxiliary combustion hood 6. The heat preservation and heating device 8 comprises a gas inlet 801, an air inlet 802 and a mixed flow ejection pipe 803.

[0145] Example 10

[0146] Example 9 is repeated except that the side of the ignition device 2 is provided with 4 ignition device peep doors 201. The side of the auxiliary combustion hood 6 is provided with 3 auxiliary combustion device peep doors 604.

[0147] Example 11

[0148] Example 9 is repeated except that the ignition heat preservation furnace device is further provided with a sweeping medium (air) pipeline 9. The sweeping medium pipeline 9 is connected to the gas branch pipe 502. The sweeping medium pipeline 9 is provided with a sweeping medium (air) pipeline flow control valve 901.

[0149] Example 12

[0150] Example 1 is repeated except that the front end of the ignition device is further provided with a material surface detection device 10.

[0151] Example 13

[0152] Example 1 is repeated, except that the device further comprises a control system 11. The control system 11 is connected to the ignition device 2, the heat preservation and heating device 8, the material surface height detection device 10, the blowing medium pipeline flow control valve 901, the main pipeline flow adjusting device 50101, the main pipeline flow detection device 50102, the branch pipeline flow adjusting device 50201, and the branch pipeline flow detection device 50202. The control system 11 controls the operation of the ignition device 2, the heat preservation and heating device 8, the material surface height detection device 10, the blowing medium pipeline flow control valve 901, the main pipeline flow adjusting device 50101, the main pipeline flow detection device 50102, the branch pipeline flow adjusting device 50201, and the branch pipeline flow detection device 50202.

[0153] Example 14

[0154] Example 1 is repeated, except that 60 gas branch pipes 502 are arranged on the gas main pipe 501. Eight blowing pipes 503 are arranged on one side of each gas branch pipe 502. The main pipeline flow adjusting device 50101 is arranged on the gas main pipe 501.

[0155] Example 15

[0156] Example 4 is repeated, except that 10 positioning holes are arranged in the vertical direction of the side wall of the auxiliary combustion hood 6. Eight positioning holes 602 are arranged in the horizontal direction of the side wall of the auxiliary combustion hood 6.

[0157] Example 16

[0158] Example 6 is repeated, except that the ignition and heat preservation furnace device further comprises six heat preservation and heating devices 8.

[0159] Example 17

[0160] Example 9 is repeated, except that eight ignition device viewing doors 201 are arranged on the side of the ignition device 2. Six auxiliary combustion device viewing doors 604 are arranged on the side of the auxiliary combustion hood 6.

[0161] Example 18

[0162] Example 1 is repeated, except that the blowing pipe 5 is a five-section blowing sleeve pipe 501.

[0163] Use method 1

[0164] A use method of a multi-section reinforced auxiliary sintering type ignition and heat preservation furnace device, the method comprising the following steps:

[0165] (1) According to the needs of the sintering material, the number of sections of the blowing pipe 503 is set; the positioning hole 602 in which the bracket 504 is placed in the vertical direction of the side wall of the auxiliary combustion hood 6 is selected, and the position of the blowing device 5 is set;

[0166] (2) The sintering machine trolley 101 runs, the material surface height detection device 10 detects the material surface height; the positioning hole 602 horizontally placed on the side wall of the auxiliary combustion hood 6 is selected, and the height of the blowing device 5 is adjusted;

[0167] (3) According to the needs, the control system controls the heat preservation and heating device 8;

[0168] (4) The fuel is poured, and the fuel blowing is started;

[0169] (5) The total pipe flow detection device 50102 detects the flow size, the control system 11 controls the total pipe flow adjusting device 50101, the branch pipe flow detection device 50202 detects the flow size, and the control system 11 controls the total pipe flow adjusting device 50201.

Claims

1. A multi-stage reinforced auxiliary sintering type ignition holding furnace device, comprising a sintering machine (1), an ignition device (2) and an auxiliary combustion device (3), the sintering machine (1) comprising a trolley (101), and along the running direction of the trolley (101), the ignition device (2) and the auxiliary combustion device (3) are sequentially arranged above the trolley (101), characterized in that: The auxiliary combustion device (3) comprises a hot air device (4), a blowing device (5) and an auxiliary combustion hood (6), the hot air device (4) and the blowing device (5) are arranged on the auxiliary combustion hood (6), the hot air device (4) comprises a hot air pipeline (401), the hot air pipeline (401) extends into or leads to the auxiliary combustion hood (6), the blowing device (5) comprises a gas main pipe (501), a gas branch pipe (502), a blowing pipe (503) and a support (504), the gas main pipe (501) is arranged outside the auxiliary combustion hood (6), one end of the gas branch pipe (502) is connected with the gas main pipe (501) and the other end is connected with the blowing pipe (503), the gas branch pipe (502) extends into the auxiliary combustion hood (6), the blowing pipe (503) is arranged on the support (504), the support (504) is located in the auxiliary combustion hood (6) and above the trolley (101); a flow regulating device (601) is further arranged in the internal space of the auxiliary combustion hood (6), the flow regulating device (601) is located above the blowing pipe (503) of the blowing device (5) but below the air outlet of the hot air pipeline (401) of the hot air device (4). ​ 2. The ignition holding furnace apparatus according to claim 1, characterized by: The flow regulating device (601) is one or both of a flow regulating plate and a flow regulating hole; and / or The gas branch pipe (502) is provided with a metal hose (50203) at a position where the gas branch pipe (502) is connected with the auxiliary combustion hood (6).

3. The ignition holding furnace apparatus according to claim 2, characterized by: The side wall of the auxiliary combustion hood (6) is further provided with a positioning hole (602), and the support (504) is placed on the positioning hole (602).

4. The ignition holding furnace apparatus according to claim 3, characterized by: The ignition heat preservation furnace device further comprises a positioning bolt (603) connected with the positioning hole (602) and the support (504).

5. The ignition holding furnace apparatus according to claim 3, characterized by: The side wall of the auxiliary combustion hood (6) is provided with 1-20 positioning holes (602) in the vertical direction, and / or The side wall of the auxiliary combustion hood (6) is provided with 1-20 positioning holes (602) in the horizontal direction.

6. The ignition holding furnace apparatus according to claim 5, characterized by: The side wall of the auxiliary combustion hood (6) is provided with 2-10 positioning holes (602) in the vertical direction, and / or The side wall of the auxiliary combustion hood (6) is provided with 2-10 positioning holes (602) in the horizontal direction.

7. The ignition holding furnace apparatus according to claim 6, characterized by: The side wall of the auxiliary combustion hood (6) is provided with 3-5 positioning holes (602) in the vertical direction, and / or The side wall of the auxiliary combustion hood (6) is provided with 3-5 positioning holes (602) in the horizontal direction.

8. The ignition holding furnace apparatus according to any one of claims 1 to 7, characterized by: The ignition heat preservation furnace device further comprises a sealing device (7) comprising a sealing plate (701) arranged on the side wall of the auxiliary combustion hood (6) and a sealing groove (702) arranged on the side plate of the trolley (101).

9. The ignition holding furnace apparatus according to claim 8, characterized by: The sealing device (7) adopts one or more of liquid sealing, sand sealing or elastic sheet sealing.

10. The ignition holding furnace apparatus according to any one of claims 1 to 7, 9, characterized by: The ignition heat preservation furnace device further comprises a heat preservation and heating device (8) arranged at the front end of the auxiliary combustion device (3) and at the top of the auxiliary combustion hood (6), the heat preservation and heating device (8) comprises a gas inlet (801), an air inlet (802) and a mixed flow injection pipe (803).

11. The ignition holding furnace apparatus according to claim 10, characterized by: The ignition and heat preservation furnace device is provided with 1-10 heat preservation and heating devices (8).

12. The ignition holding furnace apparatus according to claim 11, characterized by: The ignition and heat preservation furnace device is provided with 2-8 heat preservation and heating devices (8).

13. The ignition holding furnace apparatus according to claim 12, characterized by: The ignition and heat preservation furnace device is provided with 3-5 heat preservation and heating devices (8).

14. The ignition holding furnace apparatus according to any one of claims 1 to 7, 9, 11 to 13, characterized by: The side of the ignition device (2) is provided with an ignition device peep door (201), and / or The side of the auxiliary combustion cover (6) is provided with an auxiliary combustion device peep door (604).

15. The ignition holding furnace apparatus according to claim 14, characterized by: The side of the ignition device (2) is provided with 1-10 ignition device peep doors (201), and / or The side of the auxiliary combustion cover (6) is provided with 1-8 auxiliary combustion device peep doors (604).

16. The ignition holding furnace apparatus according to claim 15, characterized by: The side of the ignition device (2) is provided with 2-8 ignition device peep doors (201), and / or The side of the auxiliary combustion cover (6) is provided with 2-6 auxiliary combustion device peep doors (604).

17. The ignition holding furnace apparatus according to claim 16, characterized by: The side of the ignition device (2) is provided with 3-6 ignition device peep doors (201), and / or The side of the auxiliary combustion cover (6) is provided with 3-5 auxiliary combustion device peep doors (604).

18. The ignition holding furnace apparatus according to any one of claims 1-7, 9, 11-13, 15-17, characterized by: The ignition and heat preservation furnace device is also provided with a blowing medium pipeline (9) connected to the gas branch pipe (502).

19. The ignition holding furnace apparatus according to claim 18, characterized by: The blowing medium pipeline (9) is provided with a blowing medium pipeline flow control valve (901).

20. The fireback device of any one of claims 1-7, 9, 11-13, 15-17, 19, wherein: The blowing pipe (503) is a 2-section or more than 2-section blowing sleeve, the blowing sleeve adopts a telescopic sleeve structure, and the blowing sleeve is provided with a blowing hole (505).

21. The ignition holding furnace apparatus according to claim 20, characterized by: The blowing pipe (503) is a 3-section blowing sleeve, and the 3-section blowing sleeve is a telescopic sleeve structure.

22. The ignition holding furnace apparatus according to any one of claims 1 to 7, characterized by: The gas main pipe (501) is connected with 1-15 gas branch pipes (502).

23. The ignition holding furnace apparatus according to claim 22, characterized by: The gas main pipe (501) is connected with 2-10 gas branch pipes (502).

24. The ignition holding furnace apparatus according to claim 23, characterized by: The gas main pipe (501) is connected with 3-8 gas branch pipes (502).

25. The ignition holding furnace apparatus according to any one of claims 1 to 7, characterized by: The blowing pipe (503) is arranged on one side or both sides of the gas branch pipe (502) in the horizontal direction.

26. The ignition holding furnace apparatus according to claim 25, characterized by: Each gas branch pipe (502) is provided with 1-20 blowing pipes (503).

27. The ignition holding furnace apparatus according to claim 26, characterized by: Each gas branch pipe (502) is provided with 2-15 blowing pipes (503).

28. The ignition holding furnace apparatus according to claim 27, characterized by: Each gas branch pipe (502) is provided with 3-10 blowing pipes (503).

29. The ignition holding furnace apparatus according to any one of claims 1 to 7, characterized by: The gas main pipe (501) is provided with a main pipe flow adjusting device (50101), and / or The gas main pipe (501) is provided with a main pipe flow detection device (50102).

30. The ignition holding furnace apparatus according to claim 29, wherein: The gas branch pipe (502) is provided with a branch pipe flow adjusting device (50201), and / or The gas branch pipe (502) is provided with a branch pipe flow detection device (50202).

31. The ignition holding furnace apparatus according to claim 30, wherein: The front end of the ignition device is also provided with a material surface height detection device (10).

32. The ignition holding furnace apparatus according to claim 31, wherein: The device also comprises a control system (11) connected with the ignition device (2), the heat preservation and heating device (8), the material surface height detection device (10), the blowing medium pipeline flow control valve (901), the main pipeline flow adjusting device (50101), the main pipeline flow detection device (50102), the branch pipeline flow adjusting device (50201) and the branch pipeline flow detection device (50202), and the control system (11) controls the operation of the ignition device (2), the heat preservation and heating device (8), the material surface height detection device (10), the blowing medium pipeline flow control valve (901), the main pipeline flow adjusting device (50101), the main pipeline flow detection device (50102), the branch pipeline flow adjusting device (50201) and the branch pipeline flow detection device (50202).

33. The method of using the ignition and heat preservation furnace device according to any one of claims 1-32, comprising the following steps: (1) setting the number of the blowing pipes (503) according to the needs of the sintering material, selecting the positioning holes (602) of the support (504) arranged in the vertical direction of the sidewall of the auxiliary combustion cover (6), and setting the position of the blowing device (5); (2) distributing the material on the sintering machine trolley (101) and operating the ignition, and detecting the material surface height by the material surface height detection device (10); selecting the positioning holes (602) of the support (504) arranged in the horizontal direction of the sidewall of the auxiliary combustion cover (6), and adjusting the height of the blowing device (5); (3) controlling the heat preservation and heating device (8) by the control system; (4) introducing the fuel and starting to blow the fuel; (5) detecting the flow size by the main pipeline flow detection device (50102), controlling the main pipeline flow adjusting device (50101) by the control system (11), detecting the flow size by the branch pipeline flow detection device (50202), and controlling the branch pipeline flow adjusting device (50201) by the control system (11).

Images