Sintering flue gas treatment system

Abstract

The invention provides a sintering flue gas treatment system which comprises a sintering device used for moving a to-be-sintered material in the first direction and conducting sintering treatment on the to-be-sintered material, and the sintering device comprises an ignition heat preservation section, a first sintering section and a second sintering section which are arranged in the first direction, the first sintering section is connected between the ignition heat preservation section and the second sintering section; the first smoke guide device is provided with a first smoke inlet end and a first smoke exhaust end, the first smoke inlet end is communicated with the smoke exhaust air bellow of the second sintering section, and the first smoke exhaust end is arranged towards the material loading side of the first sintering section. The sintering flue gas treatment system can circularly supply the high-temperature part in the sintering flue gas to the surface of the to-be-sintered material with the low sintering degree so as to reduce heat dissipation of the sintering flue gas, heat is provided for the to-be-sintered material with the low sintering degree, reduction of glass phases generated on the surface layer of the to-be-sintered material is facilitated, and the sintering quality of the to-be-sintered material is improved. The quality of sintered ore can be improved, meanwhile, the heat utilization rate of sintering flue gas is increased, and sintering energy consumption is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sintering, and in particular, to a sintering flue gas treatment system. Background Art

[0002] In order to reduce the energy consumption in the production process, the recovery and utilization of flue gas heat have received increasing attention. In the metallurgical field, the sintering flue gas generated in the sintering production process contains a large amount of sensible heat. Some related technologies treat the sintering flue gas through heat exchange, flue gas recycling, etc. to achieve the heat utilization of the sintering flue gas. However, it is found in actual applications that the heat utilization efficiency of the sintering flue gas is low, which limits the improvement of the energy-saving level of sintering production. Summary of the Invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, according to the first aspect of the embodiments of the present disclosure, a sintering flue gas treatment system is provided, including:

[0005] A sintering device for moving a material to be sintered along a first direction and performing sintering treatment on the material to be sintered. The sintering device includes an ignition and heat preservation section, a first sintering section, and a second sintering section arranged along the first direction. The first sintering section is connected between the ignition and heat preservation section and the second sintering section;

[0006] A first smoke guiding device having a first smoke inlet end and a first smoke outlet end. The first smoke inlet end is communicated with the smoke exhaust air box of the second sintering section, and the first smoke outlet end is arranged towards the material loading side of the first sintering section.

[0007] In a feasible implementation manner, the first smoke guiding device includes:

[0008] A first smoke guiding pipeline having a first smoke inlet end;

[0009] A first smoke outlet hood having a first smoke outlet end. The first smoke outlet hood is communicated with the first smoke guiding pipeline;

[0010] A first power unit is arranged in the first smoke guiding pipeline for driving the flue gas in the first smoke guiding pipeline to flow in the direction from the first smoke inlet end to the first smoke outlet end.

[0011] In a feasible implementation manner, the first smoke guiding device further includes:

[0012] A first dust removal unit is arranged in the first smoke guiding pipeline for performing dust removal treatment on the flue gas in the first smoke guiding pipeline. The first dust removal unit is located between the first power unit and the first smoke inlet end.

[0013] In a feasible implementation manner, the sintering flue gas treatment system further includes:

[0014] A ring cooler is used to move the sinter to be cooled along a second direction and cool the sinter to be cooled. The cooling device includes a first cooling section, a second cooling section, a third cooling section, and a fourth cooling section arranged along the second direction. The second cooling section is connected between the first cooling section and the third cooling section, and the fourth cooling section is connected to one end of the third cooling section away from the second cooling section.

[0015] A second smoke guiding device has a second smoke inlet end and a second smoke outlet end. The second smoke inlet end is communicated with the smoke exhaust hood of the third cooling section. The sintering device further includes a third sintering section connected between the first sintering section and the second sintering section. The second smoke outlet end is arranged towards the material loading side of the third sintering section.

[0016] In a feasible implementation manner, the second smoke guiding device includes:

[0017] A second smoke guiding pipeline with a second smoke inlet end;

[0018] A second smoke outlet hood with a second smoke outlet end. The second smoke outlet hood is communicated with the second smoke guiding pipeline;

[0019] A second power unit is arranged in the second smoke guiding pipeline and is used to drive the flue gas in the second smoke guiding pipeline to flow in the direction from the second smoke inlet end to the second smoke outlet end.

[0020] In a feasible implementation manner, the sintering flue gas treatment system further includes:

[0021] A third smoke guiding device has a third smoke inlet end, a third smoke outlet end, and a fourth smoke outlet end. The sintering device further includes a fourth sintering section connected between the third sintering section and the second sintering section. The smoke exhaust air boxes of the ignition and heat preservation section, the first sintering section, the third sintering section, and the fourth sintering section are all communicated with the third smoke inlet end. The fourth smoke outlet end is arranged towards the material loading side of the fourth sintering section;

[0022] A flue gas purification device is communicated with the third smoke outlet end and is used to purify the flue gas discharged from the third smoke outlet end.

[0023] In a feasible implementation manner, the third smoke guiding device includes:

[0024] A third smoke guiding pipeline with a third smoke inlet end and a third smoke outlet end;

[0025] A third smoke outlet hood with a fourth smoke outlet end;

[0026] A fourth smoke guiding pipeline is communicated between the third smoke outlet hood and the third smoke outlet end;

[0027] A third power unit is arranged in the third smoke guiding pipeline and is used to drive the flue gas in the third smoke guiding pipeline to flow in the direction from the third smoke inlet end to the third smoke outlet end.

[0028] In a feasible implementation manner, the third smoke guiding device further includes:

[0029] The fourth power unit is arranged in the fourth smoke guiding pipeline, and is used for driving the smoke in the fourth smoke guiding pipeline to flow in the direction from the third smoke exhaust end to the fourth smoke exhaust end.

[0030] In a feasible implementation manner, the third smoke guiding device further includes:

[0031] The second dust removal part is arranged in the third smoke guiding pipeline and is used for performing dust removal treatment on the smoke in the third smoke guiding pipeline. The second dust removal part is located between the third power part and the third smoke inlet end.

[0032] In a feasible implementation manner, the flue gas purification device comprises:

[0033] The fifth smoke guide pipe is connected to the third smoke exhaust terminal;

[0034] A purification unit, arranged in the fifth smoke guiding pipeline, for purifying the smoke in the fifth smoke guiding pipeline;

[0035] The discharge part is connected to the output end of the purification part through the fifth smoke guiding pipeline.

[0036] The above description is only an overview of the technical solution provided by the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present disclosure more obvious and easy to understand, the implementation methods of the present disclosure are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic structural diagram of a sintering flue gas treatment system according to an embodiment of the present disclosure.

[0039] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0040] 100 sintering device; 110 material distribution assembly; 111 bottom material bin; 112 buffer ore tank; 113 mud roller; 114 multi-roller material distributor; 120 sintering trolley; 130 ignition assembly; 140 exhaust bellows; 150 exhaust pipeline; 151 first pipe section; 152 second pipe section;

[0041] 200 First smoke guiding device; 210 First smoke guiding pipeline; 220 First smoke outlet hood; 230 First power unit; 240 First dust removal unit;

[0042] 300 Ring cooler; 310 Cooling trolley; 320 Circulating air component; 321 Circulating fan; 322 Waste heat boiler; 323 Blower; 330 Smoke exhaust hood;

[0043] 400 Second smoke guiding device; 410 Second smoke guiding pipeline; 420 Second smoke outlet hood; 430 Second power unit;

[0044] 500 Third smoke guiding device; 510 Third smoke guiding pipeline; 520 Third smoke outlet hood; 530 Fourth smoke guiding pipeline; 540 Third power unit; 550 Fourth power unit; 560 Second dust removal unit;

[0045] 600 Flue gas purification device; 610 Fifth smoke guiding pipeline; 620 Purification unit; 630 Discharge unit;

[0046] 101 Ignition and heat preservation section; 102 First sintering section; 103 Second sintering section; 104 Third sintering section; 105 Fourth sintering section; 106 Feeding section;

[0047] 301 First cooling section; 302 Second cooling section; 303 Third cooling section; 304 Fourth cooling section. Detailed implementation manners

[0048] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0049] It should be noted that in the sintering process, the metal ore powder, flux, fuel, etc. to be sintered are mixed in a certain proportion and then subjected to high-temperature sintering through a sintering machine, so that the metal ore powder is transformed into sintered ore with certain strength and particle size. The aforementioned metal ore powder can be, but is not limited to, iron ore powder. A large amount of sintering flue gas is generated during the production process of the sintering process. The sintering flue gas contains pollutants or harmful substances such as dust, SO2, NO x , CO, etc. and contains a large amount of sensible heat. In the related art, the sintering flue gas circulation technology is usually adopted for the recovery and utilization of sintering flue gas, that is, a part of the flue gas generated during the sintering production process is returned to the trolley surface of the sintering machine, and the heat in the flue gas is used to participate in the sintering reaction process, so that both the heat recovery and utilization in the flue gas can be realized, and the amount of flue gas discharged into the atmosphere can be reduced. However, it is found in actual applications that the heat utilization efficiency of sintering flue gas is relatively low, which limits the improvement of the energy-saving level of sintering production.

[0050] In view of this, as Figure 1 shown, according to the first aspect of the embodiments of the present disclosure, a sintering flue gas treatment system is provided, including: a sintering device 100 for moving a material to be sintered in a first direction and performing sintering treatment on the material to be sintered. The sintering device 100 includes an ignition and heat preservation section 101, a first sintering section 102, and a second sintering section 103 arranged in the first direction. The first sintering section 102 is connected between the ignition and heat preservation section 101 and the second sintering section 103; a first smoke guiding device 200 having a first smoke inlet end and a first smoke outlet end. The first smoke inlet end is communicated with a smoke exhaust air box 140 of the second sintering section 103, and the first smoke outlet end is arranged towards the material loading side of the first sintering section 102.

[0051] The sintering flue gas treatment system provided by the embodiments of the present disclosure includes the aforementioned sintering device 100 and the aforementioned first smoke guiding device 200. Among them, the sintering device 100 can move the material to be sintered in the first direction and perform sintering treatment on the material to be sintered during the process of moving the material to be sintered. Correspondingly, the sintering device 100 includes an ignition and heat preservation section 101, a first sintering section 102, and a second sintering section 103. The aforementioned ignition and heat preservation section 101, the first sintering section 102, and the second sintering section 103 are arranged in sequence along the aforementioned first direction. The first sintering section 102 is located between the ignition and heat preservation section 101 and the second sintering section 103 and is connected to the ignition and heat preservation section 101 and the second sintering section 103. It can be understood that the aforementioned first direction is also the direction from the aforementioned ignition and heat preservation section 101 to the aforementioned second sintering section 103. Thus, when the material to be sintered moves to the ignition and heat preservation section 101 along the first direction on the sintering device 100, it can be ignited by the ignition and heat preservation section 101 and gradually sintered during the subsequent movement; the first smoke inlet end and the first smoke outlet end of the first smoke guiding device 200 are respectively arranged corresponding to the smoke exhaust air box 140 of the second sintering section 103 and the material loading side of the first sintering section 102. Among them, the aforementioned first smoke inlet end is communicated with the smoke exhaust air box 140 of the second sintering section 103. Thus, the first flue gas device can access the sintering flue gas output from the smoke exhaust air box 140 of the second sintering section 103 through the first smoke inlet end and guide the aforementioned sintering flue gas to the aforementioned first smoke outlet end. The aforementioned first smoke outlet end is arranged towards the material loading side of the first sintering section 102. Furthermore, during the sintering process, the first flue gas device can supply the sintering flue gas to the material surface of the material to be sintered on the material loading side of the first sintering section 102 through the first smoke outlet end to provide heat for the material to be sintered, realizing the heat utilization of the sintering flue gas.

[0052] And based on the foregoing settings, since the second sintering section 103 is located relatively far away from the ignition and heat preservation section 101 in the first direction, the sintering degree of the materials on the second sintering section 103 is relatively high. That is, the position of the combustion zone of the materials to be sintered on the second sintering section 103 is lower than that of the materials to be sintered on the first sintering section 102, and the temperature of the sintering flue gas in the smoke exhaust air box 140 of the second sintering section 103 is correspondingly higher. Furthermore, the sintering flue gas treatment system can use the first smoke guiding device 200 to specifically circulate the relatively high-temperature part of the sintering flue gas to the surface of the materials to be sintered with a relatively low sintering degree, so as to utilize the heat storage effect of the sintering material layer of the materials to be sintered, reduce the heat dissipation of the sintering flue gas, and provide heat for the materials to be sintered with a relatively low sintering degree, which is beneficial to reducing the glass phase generated on the surface layer of the materials to be sintered, and can reduce the sintering energy consumption while improving the quality of the sintered ore.

[0053] It should be noted that Figure 1 The solid straight line with an arrow shown in is used to schematically represent the flow direction of the flue gas or air flow; the hollow arrow at the smoke exhaust air box 140 is used to schematically represent the output direction of the smoke exhaust air box 140.

[0054] It can be understood that the materials to be sintered can include metal ore powder, flux and fuel, and the specific types and proportional relationships of the metal ore powder, flux and fuel can be set in combination with actual requirements, and will not be limited too much here. The aforementioned metal ore powder can be, but is not limited to, iron ore powder.

[0055] As Figure 1 As shown, it should be noted that if the foregoing sintering device 100 is divided by the way of structural composition, the foregoing sintering device 100 can include a feeding assembly 110, a sintering trolley 120, an ignition assembly 130 and a plurality of smoke exhaust air boxes 140. Among them, the feeding assembly 110 can include a bedding bin 111, a buffer ore bin 112, a clay roller 113, and a multi-roller feeder 114. The feeding assembly 110 can be used to distribute bedding and materials to be sintered on the loading side of the sintering trolley 120. The aforementioned multi-roller feeder 114 can be, but is not limited to, a nine-roller feeder; the loading side of the sintering trolley 120 is used to place materials to be sintered and to move the materials to be sintered along the aforementioned first direction; the ignition assembly 130 is arranged above the loading side of the sintering trolley 120 and is used to ignite the materials to be sintered; the plurality of smoke exhaust air boxes 140 are arranged along the aforementioned first direction and are arranged below the sintering trolley 120, and are used to drive the gas in the area near the sintering trolley 120 to flow from top to bottom. Thus, during the operation of the smoke exhaust air box 140, it can cause the fuel contained in the materials to be sintered to burn from top to bottom, promote the sintering of the materials to be sintered to form sintered ore. Correspondingly, the smoke exhaust air box 140 can also access the sintering flue gas and guide the sintering flue gas to discharge from the sintering trolley 120.

[0056] If the sintering device 100 is divided according to the moving direction of the material to be sintered during the sintering process, that is, the aforementioned first direction, the aforementioned sintering device 100 may include a feeding section 106 arranged along the aforementioned first direction, the aforementioned ignition and heat preservation section 101, and multiple sintering sections. Among them, the ignition and heat preservation section 101 is located between the feeding section 106 and the multiple sintering sections. The multiple sintering sections include the aforementioned first sintering section 102 and the second sintering section 103. The aforementioned feeding section 106 may include the aforementioned feeding assembly 110 and a part of the sintering trolley 120. The ignition and heat preservation section 101 may include the aforementioned ignition assembly 130, a part of the sintering trolley 120, and an exhaust air box 140 arranged corresponding to this part of the sintering trolley 120. The sintering section may include a part of the sintering trolley 120 and an exhaust air box 140 arranged corresponding to this part of the sintering trolley 120. It can be understood that the number of the exhaust air boxes 140 in the ignition and heat preservation section 101 and each sintering section may be multiple.

[0057] It should be noted that sintering flue gas is the waste gas generated during the sintering process, which has the characteristics of large flue gas volume, low temperature, complex composition, high humidity, etc. In actual production, about 4000 m 3 -6000 m 3 of sintering flue gas will be generated for every 1 ton of sintered ore produced. The humidity of the sintering flue gas is generally about 10%. The inventor found in actual production that during the sintering process, the temperature and oxygen content of the sintering flue gas in the multiple exhaust air boxes 140 show a trend of first decreasing and then increasing along the first direction, while the CO content of the sintering flue gas shows a trend of first increasing and then decreasing. For example, the flue gas temperature of the multiple exhaust air boxes 140 under the sintering trolley 120 usually gradually decreases from about 100 °C to about 80 °C along the first direction. As the combustion zone continuously moves downward, the flue gas temperature of the exhaust air box 140 at about 50% of the distance from the head of the sintering device 100 to the sintering rising point begins to rise and rises rapidly. The flue gas temperature of the exhaust air box 140 at the tail of the sintering device 100 is usually the highest, and the maximum value can reach about 500 °C. The oxygen content of the sintering flue gas in the multiple exhaust air boxes 140 under the sintering trolley 120 usually decreases from about 16% to about 10% along the first direction, and then rises to about 20%. The CO content of the sintering flue gas in the multiple exhaust air boxes 140 under the sintering trolley 120 usually rises from about 1000 mg / m 3 to about 18000 mg / m 3 and then decreases to about 1000 mg / m 3 . It can be understood that the head of the aforementioned sintering device 100 may include the aforementioned feeding section 106, and the tail of the aforementioned sintering device 100 includes the sintering section farthest from the aforementioned feeding section 106.

[0058] Based on this, the sintering flue gas treatment system provided by the present disclosure can, based on the foregoing settings, use the first flue gas guiding device 200 to guide the flue gas in the exhaust air box 140 of the second sintering section 103 to the surface of the material to be sintered on the first sintering section 102, so as to realize the recycling supply of the part of the sintering flue gas with higher temperature and oxygen content to the surface of the material to be sintered with a lower degree of sintering, reduce the heat dissipation of the sintering flue gas, and provide heat and oxygen for the material to be sintered with a lower degree of sintering, which is beneficial to reducing the glass phase generated on the surface layer of the material to be sintered, improving the quality of sintered ore while increasing the heat utilization rate and oxygen loss of the sintering flue gas, and reducing the sintering energy consumption.

[0059] It can be understood that the two ends of the sintering device 100 in the foregoing first direction can be the head end and the tail end respectively, and the foregoing second sintering section 103 can be the sintering section with the foregoing tail end, so as to further facilitate the access of the first flue gas guiding device 200 to the part of the sintering flue gas with the highest temperature and the highest oxygen content, which is beneficial to further improving the utilization efficiency of the sintering flue gas. Correspondingly, the foregoing first sintering section 102 can be the sintering section directly connected to the foregoing ignition and heat preservation section 101, so as to further facilitate the first flue gas guiding device 200 to supply the high-temperature sintering flue gas to the surface of the material to be sintered in the initial stage of sintering, and more reliably ensure the quality of the sintered ore.

[0060] It can be understood that the first sintering section 102 and the second sintering section 103 can be directly connected or indirectly connected. For example, other sintering sections can be connected between the first sintering section 102 and the second sintering section 103.

[0061] It can be understood that the demarcation point between the second sintering section 103 and the first sintering section 102 or other sintering sections can be determined according to the measurement results of the flue gas temperature and oxygen content of each exhaust air box 140 of the sintering device 100, so that the second sintering section 103 is the sintering section where the sintering flue gas temperature and / or oxygen content of the exhaust air box 140 increases along the first direction, and the length of the second sintering section 103 in the first direction and / or the number of the exhaust air boxes 140 of the second sintering section 103 can be further considered for control, so as to limit the flue gas flow rate of the first flue gas guiding device 200 and avoid the flue gas volume output by the first flue gas guiding device 200 being too large or too small in actual application, which is beneficial to further ensuring the stable operation of the first flue gas guiding device 200.

[0062] Exemplarily, when the effective sintering area of the sintering device 100 is 360 m 2 For example. As Figure 1As shown, the sintering device 100 may include 22 exhaust air boxes 140, which are arranged in sequence along the first direction and are respectively the first exhaust air box to the twenty-second exhaust air box. Among them, the first exhaust air box is close to the head end, and the twenty-second exhaust air box is close to the tail end; the sintering device 100 may include a feeding section 106, an ignition and heat preservation section 101, a first sintering section 102, a third sintering section 104, a fourth sintering section 105, and a second sintering section 103 that are connected in sequence along the first direction. Among them, the first sintering section 102 is connected between the ignition and heat preservation section 101 and the third sintering section 104, and the fourth sintering section 105 is connected between the third sintering section 104 and the second sintering section 103. The ignition and heat preservation section 101 includes the first exhaust air box to the third exhaust air box, the first sintering section 102 includes the fourth exhaust air box to the tenth exhaust air box, the third sintering section 104 includes the eleventh exhaust air box to the seventeenth exhaust air box, the fourth sintering section includes the eighteenth exhaust air box to the twentieth exhaust air box, and the second sintering section 103 includes the twenty-first exhaust air box and the twenty-second exhaust air box; the first inlet end of the first diversion device may be communicated with the output ends of the twenty-first exhaust air box and the twenty-second exhaust air box, so that the first diversion device can access sintering flue gas with a temperature of 300°C - 500°C, an oxygen content greater than 18%, and relatively low contents of harmful gases such as SO2, NO x , CO, etc.

[0063] The sintering device 100 may further include an exhaust pipe 150, and the output ends of each exhaust air box 140 are communicated with the exhaust pipe 150. Correspondingly, the first inlet end may be communicated with the output ends of the twenty-first exhaust air box and the twenty-second exhaust air box through the exhaust pipe 150. To prevent the first smoke guiding device 200 from accessing the flue gas output from other exhaust air boxes, a first isolation plate may be provided between the twentieth exhaust air box and the twenty-first exhaust air box, and a second isolation plate may be provided in the exhaust pipe 150. The second isolation plate is located between the output end of the twentieth exhaust air box and the output end of the twenty-first exhaust air box, thereby separating the internal space of the exhaust pipe 150 to define a first pipe section 151 communicated with the output ends of the twenty-first exhaust air box and the twenty-second exhaust air box, and a second pipe section 152 communicated with the output ends of other exhaust air boxes; correspondingly, the first inlet end may be communicated with the output ends of the twenty-first exhaust air box and the twenty-second exhaust air box through the first pipe section 151; the positions of the first isolation plate and the second isolation plate in the first direction may be the same, and the determination method of the positions of the first isolation plate and the second isolation plate in the first direction may refer to the determination method of the foregoing demarcation point. A hopper may be provided below the exhaust pipe 150 for receiving dirt such as dust and particulate matter carried by the sintering flue gas.

[0064] As Figure 1As shown, in some examples, the first smoke guiding device 200 includes: a first smoke guiding pipeline 210 having a first smoke inlet end; a first smoke outlet hood 220 having a first smoke exhaust end, and the first smoke outlet hood 220 is communicated with the first smoke guiding pipeline 210; a first power unit 230 disposed in the first smoke guiding pipeline 210 for driving the flue gas in the first smoke guiding pipeline 210 to flow in the direction from the first smoke inlet end to the first smoke exhaust end.

[0065] In this technical solution, the first smoke guiding device 200 may include the aforementioned first smoke guiding pipeline 210, first smoke outlet hood 220 and first power unit 230; based on the aforementioned settings, the first power unit 230 can inhale the sintering flue gas in the smoke exhaust air box 140 of the aforementioned second sintering section 103 through the first smoke guiding pipeline 210, and output the inhaled sintering flue gas to the first smoke outlet hood 220 through the first smoke guiding pipeline 210. The first smoke outlet hood 220 can be disposed above the loading side of the second sintering section 103, so as to facilitate supplying high-temperature sintering flue gas to the sintering material to be sintered on the second sintering section 103, which is beneficial to improving the quality of sintered ore while reducing sintering energy consumption.

[0066] Exemplarily, the aforementioned first power unit 230 may include a first fan and a first air damper for adjusting the air volume of the first fan. The aforementioned first fan may be, but is not limited to, a variable frequency fan, so as to facilitate adjusting the air volume of the first fan by adjusting the frequency of the first fan and / or the first air damper in practical applications.

[0067] As Figure 1 As shown, in some examples, the first smoke guiding device 200 further includes: a first dust removal unit 240 disposed in the first smoke guiding pipeline 210 for performing dust removal treatment on the flue gas in the first smoke guiding pipeline 210, and the first dust removal unit 240 is located between the first power unit 230 and the first smoke inlet end.

[0068] In this technical solution, the first smoke guiding device 200 may further include the aforementioned first dust removal unit 240; based on the aforementioned settings, the first smoke guiding device 200 can use the first dust removal unit 240 to filter the flue gas in the first smoke guiding pipeline 210 to improve the cleanliness of the flue gas output by the first smoke guiding device 200, reduce the risk of pollution of the sintering material to be sintered, and can provide a more reliable guarantee for the quality of sintered ore. Moreover, the first dust removal unit 240 is located upstream of the first power unit 230, so that the first power unit 230 can also access relatively clean flue gas, reduce the risk of damage to the first power unit 230, and is beneficial to extending the service life of the first power unit 230.

[0069] Exemplarily, the aforementioned first dust removal unit 240 may include an electrostatic precipitator and / or a mechanical dust collector.

[0070] As Figure 1As shown, in some examples, the sintering flue gas treatment system further includes: an annular cooling device 300 for moving the sintered ore to be cooled in a second direction and cooling the sintered ore to be cooled. The cooling device includes a first cooling section 301, a second cooling section 302, a third cooling section 303, and a fourth cooling section 304 arranged in the second direction. The second cooling section 302 is connected between the first cooling section 301 and the third cooling section 303, and the fourth cooling section 304 is connected to one end of the third cooling section 303 away from the second cooling section 302; a second smoke guiding device 400 having a second smoke inlet end and a second smoke outlet end. The second smoke inlet end is communicated with the smoke exhaust hood 324 of the third cooling section 303. The sintering device 100 further includes a third sintering section 104 connected between the first sintering section 102 and the second sintering section 103, and the second smoke outlet end is arranged towards the loading side of the third sintering section 104.

[0071] In this technical solution, the sintering flue gas treatment system may further include the aforementioned annular cooling device 300 and the aforementioned second smoke guiding device 400; based on the aforementioned settings, on the one hand, the sintering flue gas treatment system can use the annular cooling device 300 to cool the sintered ore output by the sintering device 100, improving the convenience and functional diversity of the sintering flue gas treatment system; on the other hand, the second smoke guiding device 400 can be used to guide the cooling flue gas in the third cooling section 303 to the surface of the sintering material to be sintered on the loading side of the third sintering section 104. Thus, the annular cooling device 300 can be used to cool the cooling flue gas in the middle and rear sections along the way, supplement heat and oxygen to the sintering material to be sintered with a relatively medium sintering degree, improve the utilization efficiency of the cooling flue gas, reduce the loss of the cooling flue gas, and is beneficial to further reducing the sintering energy consumption and improving the quality of the sintered ore.

[0072] It can be understood that the aforementioned second direction and the aforementioned first direction may be the same direction or different directions, which can be specifically set according to actual needs and will not be limited here too much.

[0073] As Figure 1 shown, the aforementioned annular cooling device 300 may be a 415m 2 liquid-sealed annular cooler. Correspondingly, the annular cooling device 300 may include a cooling trolley 310, a circulating air component 320, and a plurality of smoke exhaust hoods 324. Among them, the cooling trolley 310 is used to move the sintered ore to be cooled in the second direction, and along the aforementioned second direction, the cooling trolley 310 includes the aforementioned first cooling section 301, second cooling section 302, third cooling section 303, and fourth cooling section 304 arranged in sequence. At least one of the aforementioned smoke exhaust hoods 324 is covered above each cooling section, and the smoke exhaust hood 324 is used to access the cooling flue gas generated by the corresponding cooling section.

[0074] The circulating air component 320 may include a circulating fan 321, a waste heat boiler 322, and a plurality of blowers 323. At least one blower 323 is correspondingly arranged below each cooling section. The blower 323 is used to supply air to the corresponding cooling section, so as to realize air cooling of the sinter to be cooled. Among them, the blower 323 of the fourth cooling section 304 blows in natural air to cool the sinter to be cooled on the fourth cooling section 304 by using natural air. The smoke exhaust hood 324 corresponding to the fourth cooling section 304 is connected to the inlet of the blower 323 of the third cooling section 303. The blower 323 of the third cooling section 303 blows the cooling flue gas of the fourth cooling section 304 into the third cooling section 303 to cool the sinter to be cooled on the third cooling section 303. The aforementioned second smoke guiding device 400 can introduce the cooling flue gas through the smoke exhaust hood 324 of the third cooling section 303 and supply the cooling flue gas to the aforementioned third sintering section 104. The smoke exhaust hoods 324 of the first cooling section 301 and the second cooling section 302 are both communicated with the waste heat boiler 322. The circulating fan 321 is communicated with the output end of the waste heat boiler 322, and the circulating fan 321 can re-blow the cooling flue gas after heat exchange by the waste heat boiler 322 into the first cooling section 301 and the second cooling section 302 to cool the sinter to be cooled on the corresponding cooling sections. Such circulation is conducive to realizing the air volume balance of the first cooling section 301 and the second cooling section 302 of the annular cooler.

[0075] Based on the aforementioned settings of the annular cooler 300, in practical applications, the temperature of the cooling flue gas in the aforementioned first cooling section 301 is 300°C - 400°C, the temperature of the cooling flue gas in the second cooling section 302 is 250°C - 300°C, the temperature of the cooling flue gas in the third cooling section 303 is 150°C - 250°C, the temperature of the cooling flue gas in the fourth cooling section 304 is about 150°C, and the oxygen content of the cooling flue gas in each cooling section is relatively high, and the content of harmful gases is relatively low. Combining the aforementioned settings of the aforementioned second smoke guiding device 400, the second smoke guiding device 400 can introduce the cooling flue gas with a moderate temperature in the annular cooler 300 and supply it to the surface of the sintering material to be sintered with a moderate sintering degree, so as to provide heat and oxygen for the aforementioned sintering material to be sintered, which is conducive to improving the quality of sinter while saving sintering energy consumption, and can cooperate with the aforementioned first smoke guiding device 200 to realize the differential utilization of flue gas in the sintering process, improve the flue gas utilization efficiency of each link in the sintering process, and reduce flue gas emissions.

[0076] It should be noted that based on the aforementioned settings, in practical applications, the second smoke guiding device 400 can supply medium-temperature flue gas with a temperature of 150°C - 250°C, an oxygen concentration greater than 20%, and relatively low contents of harmful gases such as SO2, NO x , CO, etc. to the third sintering section 104. The composition of the aforementioned medium-temperature flue gas is similar to that of air, which is conducive to ensuring the quality of sinter.

[0077] Such as Figure 1As shown, in some examples, the second smoke guiding device 400 includes: a second smoke guiding pipeline 410 having a second smoke inlet end; a second smoke outlet hood 420 having a second smoke exhaust end, and the second smoke outlet hood 420 is communicated with the second smoke guiding pipeline 410; a second power unit 430 disposed in the second smoke guiding pipeline 410 for driving the flue gas in the second smoke guiding pipeline 410 to flow in the direction from the second smoke inlet end to the second smoke exhaust end.

[0078] In this technical solution, the second smoke guiding device 400 may include the aforementioned second smoke guiding pipeline 410, second smoke outlet hood 420 and second power unit 430; based on the aforementioned settings, the second power unit 430 can inhale the cooling flue gas in the smoke exhaust hood 324 of the aforementioned third cooling section 303 through the second smoke guiding pipeline 410, and output the inhaled cooling flue gas to the second smoke outlet hood 420 through the second smoke guiding pipeline 410. The second smoke outlet hood 420 can be disposed above the loading side of the third sintering section 104, so as to facilitate supplying the flue gas with appropriate temperature to the sintering material to be sintered on the third sintering section 104, which is beneficial to improving the quality of sintered ore while reducing the sintering energy consumption.

[0079] Exemplarily, the aforementioned second power unit 430 may include a second fan and a second air damper for adjusting the air volume of the second fan. The aforementioned second fan may be, but is not limited to, a variable frequency fan, so as to facilitate adjusting the air volume of the second fan by adjusting the frequency of the second fan and / or the second air damper in practical applications.

[0080] As Figure 1 As shown, in some examples, the sintering flue gas treatment system further includes: a third smoke guiding device 500 having a third smoke inlet end, a third smoke exhaust end and a fourth smoke exhaust end. The sintering device 100 further includes a fourth sintering section 105, and the fourth sintering section 105 is connected between the third sintering section 104 and the second sintering section 103. The smoke exhaust air boxes 140 of the ignition and heat preservation section 101, the first sintering section 102, the third sintering section 104 and the fourth sintering section 105 are all communicated with the third smoke inlet end, and the fourth smoke exhaust end is arranged towards the loading side of the fourth sintering section 105; a flue gas purification device 600 is communicated with the third smoke exhaust end for purifying the flue gas discharged from the third smoke exhaust end.

[0081] In this technical solution, the sintering flue gas treatment system may further include the aforementioned third flue gas guiding device 500 and the aforementioned flue gas purification device 600. Based on the aforementioned settings, on the one hand, the sintering flue gas treatment system can use the third flue gas guiding device 500 to extract the sintering flue gas generated in the ignition and heat preservation section 101, the first sintering section 102, the third sintering section 104, and the fourth sintering section 105, and guide part of the aforementioned sintering flue gas to the flue gas purification device 600 for purification treatment, so as to facilitate the discharge of the aforementioned sintering flue gas. On the other hand, the third flue gas guiding device 500 can supply part of the aforementioned sintering flue gas to the surface of the material to be sintered on the material loading side of the fourth sintering section 105, so as to remove at least part of the harmful gas components in the aforementioned sintering flue gas by using the high-temperature material to be sintered at a relatively rear position along the sintering process, while avoiding negative impacts on the quality of the sintered ore, reducing the purification treatment cost before flue gas discharge, and providing heat for the material to be sintered, thereby reducing the sintering energy consumption.

[0082] It should be noted that the positions of the ignition and heat preservation section 101, the first sintering section 102, the third sintering section 104, and the fourth sintering section 105 along the sintering process are more forward than that of the second sintering section 103. Therefore, in addition to having a certain amount of heat, the sintering flue gas generated in the ignition and heat preservation section 101, the first sintering section 102, the third sintering section 104, and the fourth sintering section 105 is likely to contain a large amount of harmful gases and has a low oxygen content. The aforementioned harmful gases include, but are not limited to, CO, dioxins, etc. Based on the aforementioned settings of this technical solution, in practical applications, the third flue gas guiding device 500 can supply the sintering flue gas with a temperature of 100°C - 200°C, an oxygen content greater than 10% and less than 16%, a CO content of 4000 mg / Nm 3 - 8000 mg / Nm 3 , NO X with a content of 200 mg / Nm 3 - 400 mg / Nm 3 , a SO2 content of 500 mg / Nm 3 - 1500 mg / Nm 3 to the aforementioned fourth sintering section 105, so as to remove at least part of the harmful gas components in the aforementioned sintering flue gas by using the high-temperature sintered ore zone and combustion zone in the material of the fourth sintering section 105, and reduce the purification treatment cost before flue gas discharge.

[0083] It can be understood that both NO X and dioxins can decompose under high-temperature conditions, and the content of harmful substances in the decomposition products is relatively low. Moreover, the minerals, carbon, metal oxides, oxidizing atmosphere or reducing atmosphere, etc. contained in the aforementioned high-temperature sintered ore zone and combustion zone are likely to play a catalytic role in the decomposition of NO X and dioxins, or react with NO XReact with dioxin, and then based on the foregoing settings, the sintering flue gas treatment system can utilize the high-temperature sintered ore zone and combustion zone in the materials of the foregoing fourth sintering section 105 to remove NO in the foregoing sintering flue gas. X And dioxin. Both oxygen and metal oxides are prone to react with CO under high-temperature conditions, thereby oxidizing CO and converting it into CO2. The material layer in the fourth sintering section 105 contains a certain amount of oxygen and metal oxides, such as iron oxides. Then, based on the foregoing settings, the sintering flue gas treatment system can utilize the high-temperature sintered ore zone and combustion zone in the materials of the foregoing fourth sintering section 105 to remove CO in the foregoing sintering flue gas. Based on this, the sintering flue gas treatment system can remove at least part of the harmful gas components in the foregoing sintering flue gas, reducing the purification treatment cost before flue gas emission.

[0084] Such as Figure 1 As shown, in some examples, the third smoke guiding device 500 includes: a third smoke guiding pipeline 510, having a third smoke inlet end and a third smoke outlet end; a third smoke outlet hood 520, having a fourth smoke outlet end; a fourth smoke guiding pipeline 530, connected between the third smoke outlet hood 520 and the third smoke outlet end; a third power unit 540, disposed in the third smoke guiding pipeline 510, for driving the flue gas in the third smoke guiding pipeline 510 to flow in the direction from the third smoke inlet end to the third smoke outlet end.

[0085] In this technical solution, the third smoke guiding device 500 includes the foregoing third smoke guiding pipeline 510, third smoke outlet hood 520, fourth smoke guiding pipeline 530, and third power unit 540; based on the foregoing settings, the third power unit 540 can inhale the sintering flue gas in the smoke exhaust air boxes 140 of the foregoing ignition and heat preservation section 101, first sintering section 102, third sintering section 104, and fourth sintering section 105 through the third smoke guiding pipeline 510, and output part of the inhaled sintering flue gas to the third smoke outlet hood 520 through the fourth smoke guiding pipeline 530. The third smoke outlet hood 520 can be disposed above the loading side of the fourth sintering section 105, so as to facilitate supplying high-temperature sintering flue gas to the materials to be sintered on the fourth sintering section 105, which is beneficial to improving the quality of sintered ore while reducing sintering energy consumption, and using the high-temperature materials to be sintered on the fourth sintering section 105 to remove at least part of the harmful gas components in the foregoing sintering flue gas, reducing the purification treatment cost before flue gas emission.

[0086] Exemplarily, the foregoing third power unit 540 may include a third fan and a third air damper for adjusting the air volume of the third fan. The foregoing third fan may be, but is not limited to, a variable-frequency fan, so as to facilitate adjusting the air volume of the third fan by adjusting the frequency of the third fan and / or the third air damper in practical applications.

[0087] Such as Figure 1As shown, in some examples, the third smoke guiding device 500 further includes: a fourth power unit 550, disposed in the fourth smoke guiding pipeline 530, for driving the flue gas in the fourth smoke guiding pipeline 530 to flow in the direction from the third smoke exhaust end to the fourth smoke exhaust end.

[0088] In this technical solution, the third smoke guiding device 500 may further include the aforementioned fourth power unit 550; based on the aforementioned arrangement, the fourth power unit 550 can drive the flue gas in the fourth smoke guiding pipeline 530 to flow towards the third smoke outlet hood 520, improving the smoke supply efficiency of the third smoke guiding device 500 to the fourth sintering section 105.

[0089] As Figure 1 shown, in some examples, the third smoke guiding device 500 further includes: a second dust removal unit 560, disposed in the third smoke guiding pipeline 510, for performing dust removal treatment on the flue gas in the third smoke guiding pipeline 510, and the second dust removal unit 560 is located between the third power unit 540 and the third smoke inlet end.

[0090] In this technical solution, the third smoke guiding device 500 may further include the aforementioned second dust removal unit 560; based on the aforementioned arrangement, the third smoke guiding device 500 can use the second dust removal unit 560 to filter the flue gas in the third smoke guiding pipeline 510, so as to improve the cleanliness of the flue gas output by the third smoke guiding device 500, reduce the risk of contamination of the material to be sintered, and can provide a more reliable guarantee for the quality of sintered ore. Moreover, the third dust removal unit is located upstream of the third power unit 540, so that the third power unit 540 can also access relatively clean flue gas, reducing the risk of damage to the third power unit 540 and being beneficial to extending the service life of the third power unit 540.

[0091] Exemplarily, the aforementioned second dust removal unit 560 may include an electrostatic precipitator and / or a mechanical dust collector.

[0092] As Figure 1 shown, in some examples, the flue gas purification device 600 includes: a fifth smoke guiding pipeline 610, communicating with the third smoke exhaust end; a purification unit 620, disposed in the fifth smoke guiding pipeline 610, for performing purification treatment on the flue gas in the fifth smoke guiding pipeline 610; and an emission unit 630, communicating with the output end of the purification unit 620 through the fifth smoke guiding pipeline 610.

[0093] In this technical solution, the flue gas purification device 600 may include the aforementioned fifth flue gas pipeline 610, the purification section 620, and the discharge section 630. Based on the aforementioned settings, the flue gas purification device 600 can access a part of the sintering flue gas in the third flue gas pipeline 510 through the fifth flue gas pipeline 610, and purify the flue gas in the fifth flue gas pipeline 610 through the purification section 620 to reduce the harmful components and pollutants in the flue gas. Furthermore, the purified flue gas can be discharged through the discharge section 630, which is beneficial to improving the environmental protection and cleanliness of the sintering flue gas treatment system.

[0094] Exemplarily, the aforementioned purification section 620 may include, but is not limited to, a desulfurization and denitration device.

[0095] Exemplarily, the aforementioned discharge section 630 may include, but is not limited to, a chimney.

[0096] In some feasible examples, the ratio of the flue gas flow rate of the fourth flue gas pipeline 530 to the flue gas flow rate of the fifth flue gas pipeline 610 is less than or equal to 3 / 7 and greater than or equal to 1 / 4. Exemplarily, the aforementioned ratio may be 1 / 3.

[0097] As Figure 1 shown, in some feasible examples, the upper part of the second sintering section 103 is open to facilitate the access of natural wind.

[0098] In the present disclosure, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected to", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0099] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present disclosure.

[0100] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0101] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A sintering flue gas treatment system, characterized in that, Including: A sintering device for moving the material to be sintered in a first direction and sintering the material to be sintered. The sintering device includes an ignition and heat preservation section, a first sintering section, and a second sintering section arranged in the first direction. The first sintering section is connected between the ignition and heat preservation section and the second sintering section. A first smoke guiding device having a first smoke inlet end and a first smoke outlet end. The first smoke inlet end is communicated with the smoke exhaust air box of the second sintering section, and the first smoke outlet end is arranged towards the material loading side of the first sintering section.

2. The sintering flue gas treatment system according to claim 1, characterized in that, The first smoke guiding device includes: A first smoke guiding pipeline having the first smoke inlet end; A first smoke outlet hood having the first smoke outlet end, and the first smoke outlet hood is communicated with the first smoke guiding pipeline; A first power unit arranged in the first smoke guiding pipeline for driving the flue gas in the first smoke guiding pipeline to flow in the direction from the first smoke inlet end to the first smoke outlet end.

3. The sintering flue gas treatment system according to claim 2, wherein, The first smoke guiding device further includes: A first dust removal unit arranged in the first smoke guiding pipeline for dust removal treatment of the flue gas in the first smoke guiding pipeline. The first dust removal unit is located between the first power unit and the first smoke inlet end.

4. The sintering flue gas treatment system according to claim 1, characterized in that, Also including: An annular cooling device for moving the sintered ore to be cooled in a second direction and cooling the sintered ore to be cooled. The cooling device includes a first cooling section, a second cooling section, a third cooling section, and a fourth cooling section arranged in the second direction. The second cooling section is connected between the first cooling section and the third cooling section, and the fourth cooling section is connected to one end of the third cooling section away from the second cooling section. A second smoke guiding device having a second smoke inlet end and a second smoke outlet end. The second smoke inlet end is communicated with the smoke exhaust hood of the third cooling section. The sintering device further includes a third sintering section connected between the first sintering section and the second sintering section, and the second smoke outlet end is arranged towards the material loading side of the third sintering section.

5. The sintering flue gas treatment system according to claim 4, wherein, The second smoke guiding device includes: A second smoke guiding pipeline having the second smoke inlet end; A second smoke outlet hood having the second smoke outlet end, and the second smoke outlet hood is communicated with the second smoke guiding pipeline; A second power unit arranged in the second smoke guiding pipeline for driving the flue gas in the second smoke guiding pipeline to flow in the direction from the second smoke inlet end to the second smoke outlet end.

6. The sintering flue gas treatment system according to claim 4, wherein Also including: A third smoke guiding device having a third smoke inlet end, a third smoke outlet end, and a fourth smoke outlet end. The sintering device further includes a fourth sintering section connected between the third sintering section and the second sintering section. The smoke exhaust air boxes of the ignition and heat preservation section, the first sintering section, the third sintering section, and the fourth sintering section are all communicated with the third smoke inlet end, and the fourth smoke outlet end is arranged towards the material loading side of the fourth sintering section; A flue gas purification device communicated with the third smoke outlet end for purifying the flue gas discharged from the third smoke outlet end.

7. The sintering flue gas treatment system according to claim 6, characterized in that, The third smoke guiding device includes: A third smoke guiding pipeline having the third smoke inlet end and the third smoke outlet end; A third smoke outlet hood having the fourth smoke outlet end; The fourth smoke guide pipeline is connected between the third smoke outlet hood and the third smoke exhaust end; The third power unit is arranged in the third smoke guide pipeline and is used to drive the flue gas in the third smoke guide pipeline to flow in the direction from the third smoke inlet end to the third smoke exhaust end.

8. The sintering flue gas treatment system according to claim 7, characterized in that, The third smoke guide device further includes: The fourth power unit is arranged in the fourth smoke guide pipeline and is used to drive the flue gas in the fourth smoke guide pipeline to flow in the direction from the third smoke exhaust end to the fourth smoke exhaust end.

9. The sintering flue gas treatment system according to claim 7, wherein, The third smoke guide device further includes: The second dust removal unit is arranged in the third smoke guide pipeline and is used to perform dust removal treatment on the flue gas in the third smoke guide pipeline. The second dust removal unit is located between the third power unit and the third smoke inlet end.

10. The sintering flue gas treatment system according to claim 6, characterized in that, The flue gas purification device includes: The fifth smoke guide pipeline is connected to the third smoke exhaust end; The purification unit is arranged in the fifth smoke guide pipeline and is used to perform purification treatment on the flue gas in the fifth smoke guide pipeline; The discharge unit is connected to the output end of the purification unit through the fifth smoke guide pipeline.

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