Floor-standing large flue system and sintering machine main plant

Abstract

The present invention discloses a floor-standing large flue and a main room of a sintering machine. The floor-standing large flue comprises a large flue and a dust transfer and collection mechanism arranged at the dust output side of the bottom of the large flue; wherein, a drop hole for dust to fall is provided at the bottom of the large flue; the dust transfer and collection mechanism is used to transfer and collect the dust discharged from the drop hole of the large flue, and the dust transfer and collection mechanism comprises a sealed shell and a dust conveyor arranged along the extension direction of the large flue, a sealed channel is provided in the sealed shell, the dust conveyor is arranged in the sealed channel, and at least one end of the sealed shell is provided with a temporary storage box for collecting dust, and the dust discharged from the drop hole of the large flue is transferred to the temporary storage box for collection by the dust conveyor. The large flue floor-standing sintering machine system of the present invention reduces the installation position of the large flue, reduces the elevation of the sintering machine plant, and reduces the engineering cost of the plant.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical sintering equipment, in particular to a floor-standing large flue system for a sintering machine and a main plant of a floor-standing large flue sintering machine. Background Art

[0002] The sintering process of materials in the sintering machine is a process in which the surface of the mixed material loaded on the sintering trolley is ignited, and the flue gas system composed of the lower bellows, flue and main exhaust fan uses the kinetic energy of the exhaust to create a pressure difference between the upper and lower parts of the mixed material, so as to promote the combustion zone of the sintered mixed material to burn from top to bottom. During sintering, the outside air penetrates the material layer from the upper part of the sintering machine trolley, forming sintering flue gas containing a large amount of dust and impurities. Under the action of the main exhaust fan, the gas passes through the bellows and flue and is finally discharged to the desulfurization and denitrification system.

[0003] The flue is an important part of the sintering machine system, connecting the sintering machine wind box and the main exhaust fan. Figure 1 and Figure 2 As shown, in the existing main building of the sintering machine, in order to reserve installation space for the double-layer ash discharge valve and the corresponding leakage trough under the large flue, the large flue is generally arranged at a position more than 7 meters above the ground.

[0004] The diameter of the large flue is generally about 5 meters. The installation position of the large flue is too high, which increases the elevation of the main factory building and the corresponding connecting facilities and equipment. The factory building is high, the large flue and the corresponding equipment are difficult to install, and the project cost is high. In order to facilitate the ash discharge of the large flue, several ash chutes are set at the bottom, and double-layer ash unloading valves are set under the ash chute. The ash chute and double-layer ash unloading valve are used for dust discharge. The sintering machine has many failure points and air leakage points, and the sintering machine has poor stability and sealing. Summary of the invention

[0005] The large flue floor-standing sintering machine system provided by the present invention solves the technical problems that the existing large flue is installed too high, the elevation of the main plant and corresponding connecting facilities and equipment is increased, resulting in high plant height, difficulty in installing the large flue and corresponding equipment, and high engineering cost.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A floor-type large flue system for a sintering machine, comprising a large flue extending along the length direction of a sintering machine body and a dust transfer and collection mechanism arranged at the dust output side of the bottom of the large flue; wherein the large flue is directly laid on the ground in a floor-type manner; a drop hole for dust to fall is provided at the bottom of the large flue, and a plurality of the drop holes are arranged at intervals along the extension direction of the large flue; the dust transfer and collection mechanism is arranged in a trench dug on the ground, and is used to transfer and collect dust discharged from the drop holes of the large flue; the dust The transfer and collection mechanism includes a sealed shell and a dust conveyor arranged along the extension direction of the large flue. The sealed shell is sealedly connected to the outer wall surface of the bottom of the large flue to form a sealed channel. The drop hole is sealed and connected to the sealed channel. The dust conveyor is arranged in the sealed shell. At least one end of the sealed shell is provided with a temporary storage box for collecting dust. The output end of the dust conveyor extends into the accommodating cavity of the temporary storage box. The dust discharged from the drop hole of the large flue is transferred to the temporary storage box for collection through the dust conveyor.

[0008] Furthermore, the large flue includes a smoke pipe channel and mounting brackets arranged on both sides of the smoke pipe channel for supporting the smoke pipe channel from the ground, the drop hole is arranged at the bottom of the smoke pipe channel, and the sealing shell is sealed and connected to the outer wall surface of the bottom of the smoke pipe channel.

[0009] Furthermore, the cross-section of the sealed shell is a rectangle with an opening at the top, and the sealed shell is sealed and connected to the outer wall surface of the bottom of the smoke pipe channel through a flange to form the sealed channel; the temporary storage box is sealed and connected to the sealed channel.

[0010] Furthermore, the temporary storage boxes are respectively provided at both ends of the sealed housing, and the number of the dust conveyors is multiple, and the multiple dust conveyors are arranged at intervals along the width direction of the sealed housing.

[0011] At least one of the dust conveyors moves along a first conveying trajectory to transfer the dust discharged from the drop-out hole of the smoke duct channel to the temporary storage box at one end of the sealed shell for collection, and at least one of the dust conveyors moves along a second conveying trajectory to transfer the dust discharged from the drop-out hole of the smoke duct channel to the temporary storage box at the other end of the sealed shell for collection.

[0012] Furthermore, the sealed shell is arranged in the trench pre-dug at the lower side of the smoke pipe channel, the trench extends downward corresponding to the position of the temporary storage box and is dug with a vertical extension groove, and the temporary storage box is installed in the vertical extension groove.

[0013] Furthermore, the temporary storage box includes a vertically arranged material drop channel, the top input end of the material drop channel is connected to the output end of the dust conveyor, the transmission pipe of the material drop channel extends vertically downward, and an output port is provided at the bottom of the transmission pipe, and the dust transfer and collection mechanism also includes a belt conveyor arranged at the output port for transporting the dust discharged from the material drop channel; the top input end of the material drop channel is provided with a guide plate for guiding the dust output by the dust conveyor into the material drop channel, so that the dust output by the dust conveyor can slide into the temporary storage box by its own inertia and gravity.

[0014] Furthermore, a first valve and a second valve spaced apart vertically are provided at the bottom output end of the discharge channel, and the first valve, the second valve and the transmission pipeline enclose a discharge buffer chamber.

[0015] Furthermore, the first valve and the second valve are both electrically controlled valves, and the dust conveyor further comprises a controller and a material level detector, wherein the material level detector is used to detect the amount of dust stored in the temporary storage box and send a material level detection signal to the controller, and the controller is used to receive the material level detection signal and send an opening or closing signal to the first valve, and the controller is also used to send an opening or closing signal to the second valve.

[0016] The first valve opens in response to an opening signal sent by the controller to allow dust to fall into the buffer chamber, the first valve closes in response to a closing signal sent by the controller to isolate the bottom output end of the temporary storage box from the buffer chamber, and the second valve opens in response to an opening signal sent by the controller to discharge dust from the buffer chamber.

[0017] The present invention also provides a main plant of a sintering machine, including a sintering machine body erected above the ground, and also including a floor-standing large flue system as described in any of the above items; wherein the height between the sintering machine body and the ground matches the diameter of the large flue.

[0018] Furthermore, it also includes a sintering machine ore bucket arranged at the tail of the sintering machine, a ring cooler feeding chute arranged at the output side of the sintering machine ore bucket, and a ring cooler trolley arranged at the output side of the ring cooler feeding chute, and the ring cooler trolley (60) is on the same horizontal plane as the large flue.

[0019] The present invention has the following beneficial effects:

[0020] The floor-standing large flue system and the main plant of a sintering machine of the present invention comprise a sintering machine body arranged off the ground and a large flue assembly arranged on the ground, the large flue assembly comprising a large flue and a dust transfer and collection mechanism, the sintering trolley is guided to move from the head toward the tail of the sintering machine through the sintering machine body, negative pressure is generated through the large flue and smoke is drawn out, so that the material on the sintering trolley is sintered; the dust transfer mechanism comprises a sealed shell and a dust conveyor, a sealed channel is arranged in the sealed shell, the sealed shell is sealed with the bottom of the large flue, at least one end of the sealed shell is provided with a temporary storage box for collecting dust, the temporary storage box is sealedly connected to the sealed shell and is in sealed communication with the sealed channel, which is conducive to maintaining a good working environment; the dust conveyor is arranged in the sealed channel, and the dust dropped from the drop hole is conveyed along the dust conveyor by the dust conveyor The main flue is transferred to the temporary storage box in the extension direction, and the existing double-layer ash unloading valve and the corresponding chute design are cancelled. The vertical height occupied by the sealing shell is small, which reduces the installation position of the main flue, so that the main flue can be stably installed on the ground, and the elevation of the connecting facilities and equipment matched with the main flue is reduced, thereby reducing the elevation of the sintering machine plant and reducing the engineering cost of the plant, which is beneficial to improve the stability of the sintering machine plant and avoid the sintering machine plant in areas with high seismic intensity. The convenience of installation and maintenance of the main flue is increased; at the same time, by arranging the sealing shell along the extension direction of the main flue, the sealing shell is sealed and connected to the outer wall of the bottom of the main flue, and the sealing shell and the main flue have good sealing properties, which reduces the air leakage rate of the main flue, improves the stability and work efficiency of the sintering machine, and reduces the production cost.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a structural diagram of the existing main plant of the sintering machine;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the existing main plant of the sintering machine;

[0025] Figure 3 It is a structural schematic diagram of the main plant of a floor-standing large flue sintering machine according to a preferred embodiment of the present invention;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of the main plant of a floor-standing large flue sintering machine according to a preferred embodiment of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the dust transfer and collection mechanism and the large flue in the preferred embodiment of the present invention;

[0028] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the dust transfer and collection mechanism in coordination with the large flue;

[0029] Figure 7 yes Figure 6 A-direction view in the figure;

[0030] Figure 8 yes Figure 6 The enlarged view of point B in FIG.

[0031] Fig. 9 yes Figure 8 Schematic diagram of the structure of CC in .

[0032] Legend:

[0033] 10. Sintering machine body; 20. Large flue; 21. Smoke pipe channel; 211. Dropping hole; 22. Mounting bracket; 30. Dust transfer and collection mechanism; 31. Sealed shell; 32. Dust conveyor; 33. Temporary storage box; 331. Guide plate; 332. First valve; 333. Second valve; 334. Material level detector; 34. Belt conveyor; 40. Sintering machine hopper; 50. Annular cooler feeding chute; 60. Annular cooler trolley. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0035] Figure 1 It is a structural schematic diagram of an existing sintering machine system; Figure 2 It is a schematic diagram of the cross-sectional structure of an existing sintering machine system; Figure 3 2 is a schematic structural diagram of a large flue floor-standing sintering machine system according to a preferred embodiment of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of a large flue floor-standing sintering machine system according to a preferred embodiment of the present invention; Figure 5 It is a structural schematic diagram of the dust transfer and collection mechanism and the large flue in the preferred embodiment of the present invention; Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the dust transfer and collection mechanism in coordination with the large flue; Figure 7 yes Figure 6 A-direction view in the figure; Figure 8 yes Figure 6 The enlarged view of point B in FIG. Fig. 9 yes Figure 8 Schematic diagram of the structure of CC in .

[0036] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the main building of the floor-standing large flue sintering machine of this embodiment includes a sintering machine body 10 and a floor-standing large flue assembly on a trolley track arranged on the ground and along the sintering machine body 10 .

[0037] The large flue assembly includes a large flue 20 directly arranged on the ground and a dust transfer and collection mechanism 30 arranged on the dust output side of the large flue 20; wherein, a drop hole 211 for dust to fall is opened at the bottom of the large flue 20, and a plurality of drop holes 211 are arranged at intervals along the extension direction of the large flue 20; the dust transfer and collection mechanism 30 is arranged in a trench pre-dug on the bottom surface, and is used to transfer and collect the dust discharged from the drop holes 211 of the large flue 20, and the dust transfer and collection mechanism 30 includes a sealed shell 31 arranged along the extension direction of the large flue 20 And the dust conveyor 32, the sealed shell 31 is sealed and connected to the outer wall surface of the bottom of the large flue 20 to form a sealed channel, the dust conveyor 32 is arranged in the accommodating cavity formed by the sealed shell 31 and the large flue 20, at least one end of the sealed shell 31 is provided with a temporary storage box 33 for collecting dust, the temporary storage box 33 can be sealed and connected to the sealed shell 31, the output end of the dust conveyor 32 extends into the accommodating cavity of the temporary storage box 33, and the dust discharged from the drop hole 211 of the large flue 20 is transported to the temporary storage box 33 for collection through the dust conveyor 32.

[0038] The floor-standing large flue and sintering machine main plant system of the present invention comprises a sintering machine body arranged off the ground and a large flue assembly arranged on the ground, the large flue assembly comprises a large flue 20 and a dust transfer and collection mechanism 30, the sintering trolley is guided to move from the head toward the tail of the sintering machine through the sintering machine body 10, a negative pressure is generated in the large flue 20 by the exhaust fan and the flue gas is led out, so that the material on the sintering trolley is sintered; the dust transfer mechanism comprises a sealed shell 31 and a dust conveyor 32, a sealed channel is arranged in the sealed shell 31, the sealed shell 31 is sealed with the bottom of the large flue 20, at least one end of the sealed shell 31 is provided with a temporary storage box 33 for collecting dust, the temporary storage box 33 is sealedly connected to the sealed shell 31 and is in sealed communication with the sealed channel, which is conducive to maintaining a good working environment; the dust conveyor 32 is arranged in the sealed channel, and the dust conveyor 32 is used to work to drop the material from the drop hole 211 The fallen dust is transferred to the temporary storage box 33 along the extension direction of the large flue 20, and the existing double-layer ash unloading valve and chute design are cancelled. The vertical height occupied by the sealing shell 31 is small, which reduces the installation position of the large flue 20, so that the large flue 20 can be stably installed on the ground, and the elevation of the connecting facilities and equipment matched with the large flue 20 is reduced, thereby reducing the elevation of the sintering machine plant and reducing the engineering cost of the plant, which is beneficial to improve the stability of the sintering machine plant and avoid the sintering machine plant in areas with high seismic intensity. The convenience of installation and maintenance of the large flue 20 is increased; at the same time, by arranging the sealing shell 31 along the extension direction of the large flue 20, the sealing shell 31 is sealed and connected to the outer wall of the bottom of the large flue 20, and the sealing shell 31 and the large flue 20 have good sealing properties, which reduces the air leakage rate of the large flue 20, improves the stability and work efficiency of the sintering machine, and reduces the production cost.

[0039] Optionally, in the present invention, a large flue floor-standing sintering machine system includes a sintering trolley for loading materials and driving the materials for sintering, a trolley track for guiding the movement of the sintering trolley, a bellows arranged at the lower side of the trolley track for collecting post-combustion flue gas, and a large flue assembly arranged at the lower side of the bellows for guiding the exhaust of the flue gas, the large flue assembly being connected to the bellows, and extending from the head of the trolley track toward the tail.

[0040] Optionally, the dust conveyor 32 includes a chain conveyor, which includes a first transmission belt, a conveying plate, and a first active component and a first driven component relatively arranged on both sides of the sealed shell 31. The conveying plate is fixed on the transmission belt, and the first transmission belt is respectively connected to the first active component and the first driven component for transmission. The first transmission belt is driven by the first active component to drive the conveying plate to move along the conveying trajectory, thereby collecting and conveying the dust to the temporary storage box 33.

[0041] Furthermore, the large flue 20 includes a smoke pipe channel 21 and mounting brackets 22 arranged on both sides of the sealing shell 31 for supporting the smoke pipe channel 21 from the ground. A drop hole 211 is arranged at the bottom of the smoke pipe channel 21, and the sealing shell 31 is sealed and connected to the outer wall surface of the bottom of the smoke pipe channel 21. The smoke pipe channel is supported on the ground by arranging the mounting bracket, which is convenient for the installation and maintenance of the smoke pipe channel. The sealing shell is arranged at the bottom of the smoke pipe channel and is sealed and connected to the smoke pipe channel, which improves the sealing of the smoke pipe channel. Optionally, mounting brackets 22 are arranged on both sides of the smoke pipe channel 21, and the mounting brackets 22 on one side of the smoke pipe channel 21 are arranged at intervals along the extension direction of the smoke pipe channel 21.

[0042] Further, the cross-section of the sealing shell 31 is in the shape of a rectangle with an upper opening, and the sealing shell 31 is sealed and connected to the outer wall surface of the bottom of the smoke tube channel 21 through a flange. Optionally, a flange mounting edge is provided at the bottom of the smoke tube channel 21, and the sealing shell 31 is connected to the flange mounting edge by bolts. By setting the smoke tube channel 21 and the sealing shell 31 to be sealed and connected by a flange, it is convenient to disassemble the sealing shell 31 for maintenance. Optionally, the cross-section of the sealing shell 31 can also be circular, semicircular or polygonal, and the sealing channel is a corresponding circular channel, semicircular channel or multi-deformable channel. In the present invention, in order to make the sealing shell 31 more stably supported on the ground and sealed and connected to the smoke tube channel 21, the sealing shell adopts a rectangle with an upper opening. Optionally, the sealing shell 31 and the smoke tube channel 21 can be in surface-fitting contact, and the blanking hole 211 passes through the top of the sealing shell 31 to avoid the setting, so that the blanking hole 211 is connected to the sealing channel.

[0043] Further, the dust conveyor 32 adopts a chain conveyor and / or a scraper conveyor. Optionally, the dust conveyor 32 adopts a chain conveyor, which includes a first transmission belt, a conveying plate, and a first active component and a first driven component relatively arranged on both sides of the sealed housing 31, the conveying plate is fixedly arranged on the transmission belt, the first transmission belt is respectively connected to the first active component and the first driven component, and the first transmission belt is driven by the first active component to drive the conveying plate to move along the conveying track, thereby collecting and conveying the dust to the temporary storage box 33; Optionally, the dust conveyor 32 includes an embedded scraper conveyor, which includes a second transmission belt, an embedded scraper, and a second active component and a second driven component relatively arranged on both sides of the sealed housing 31, the embedded scraper is fixedly arranged on the transmission belt, the second transmission belt is respectively connected to the second active component and the second driven component, and the second transmission belt is driven by the second active component to drive the embedded scraper to move along the conveying track, thereby scraping and outputting the dust on the bottom plate of the sealed housing 31 to the temporary storage box 33.

[0044] Optionally, the smoke duct channel 21 is made by welding steel plates, or the smoke duct channel 21 is formed by pouring reinforced concrete.

[0045] Better yet, see Figure 8 ,and Fig. 9 The dust conveyor 32 adopts a scraper conveyor. By setting the cross-section of the sealed shell 31 to a rectangular shape with an upper opening, it is convenient to set a buried scraper conveyor in the sealed shell 31 for exhaust and dust collection, thereby replacing the double-layer ash discharge valve and the chute, and reducing the installation height of the smoke pipe channel 21. At the same time, the buried scraper of the buried scraper conveyor cooperates with the bottom plate of the sealed shell 31 to scrape and discharge the dust that falls from the smoke pipe channel into the bottom plate of the sealed shell 31 into the temporary storage box 33.

[0046] Furthermore, temporary storage boxes 33 are respectively provided at both ends of the sealed shell 31, and there are multiple dust conveyors 32, which are arranged at intervals along the width direction of the sealed shell 31. At least one dust conveyor 32 moves along a first conveying trajectory to transfer dust discharged from the drop hole 211 of the smoke duct channel 21 to the temporary storage box 33 at one end of the sealed shell 31 for collection, and at least one dust conveyor 32 moves along a second conveying trajectory to transfer dust discharged from the drop hole 211 of the smoke duct channel 21 to the temporary storage box 33 at the other end of the sealed shell 31 for collection. It can be understood that the buried scraper includes a first layer of scrapers above the bottom plate of the sealed shell 31 and a second layer of scrapers above the first layer of scrapers. The movement of the dust conveyor 32 along the first conveying trajectory can be that the first layer of scrapers runs along the direction from the head to the tail of the smoke duct channel 21, and the dust is scraped and transported to the temporary storage box 33 at the tail of the sealed shell 31; the movement of the dust conveyor 32 along the second conveying trajectory can be that the first layer of hanging plates runs along the direction from the tail to the head of the smoke duct channel 21, and the dust is scraped and transported to the temporary storage box 33 at the head of the smoke duct channel 21.

[0047] Furthermore, the temporary storage box 33 includes a material dropping channel arranged vertically, the top input end of the material dropping channel is connected to the output end of the dust conveyor 32, the transmission pipe at the bottom of the material dropping channel extends vertically downward, and the top input end of the material dropping channel is provided with a guide plate 331 for guiding the dust output by the dust conveyor 32 into the material dropping channel, so that the dust output by the dust conveyor 32 slides into the temporary storage box 33 by its own inertia and gravity. It can be understood that in this embodiment, the output end of the guide plate 331 is tilted downward toward the material dropping channel, so that the dust conveyor 32 can automatically discharge the dust into the material dropping channel, the structure is simple, and the flow of the disturbed airflow in the sealed housing 31 is reduced while ensuring automatic material collection, turbulence is avoided, and the sealing of the sealed housing 31 is ensured.

[0048] Furthermore, in order to improve the convenience of smoke pipe channel maintenance after lowering the installation height of the smoke pipe channel, the sealing housing 31 is arranged in a trench pre-dug at the lower side of the smoke pipe channel 21, the trench extends downward corresponding to the position of the material dropping channel and is dug with a vertical extension groove, the transmission pipeline of the material dropping channel extends into the vertical extension groove, and an output port is opened at the bottom of the transmission pipeline, and the dust transport collection mechanism 30 also includes a belt conveyor 34 arranged at the output port of the transmission pipeline for conveying dust discharged from the material dropping channel. Optionally, the depth of the trench is not less than 1.8 meters.

[0049] Furthermore, a first valve 332 and a second valve 333 arranged vertically at intervals are provided at the bottom output end of the discharge channel, and the first valve 332 and the second valve 333 as well as the transmission pipeline enclose a discharge buffer chamber.

[0050] Further, please refer again to Figure 5 , the first valve 332 and the second valve 333 are both electrically controlled valves, the dust conveyor 32 also includes a controller and a level detector 334, the level detector 334 is used to detect the amount of dust stored in the temporary storage box 33 and send a level detection signal to the controller, the controller is used to receive the level detection signal and send an opening or closing signal to the first valve 332, the controller is also used to send an opening or closing signal to the second valve 333, the first valve 332 opens in response to the opening signal sent by the controller to allow the dust to fall into the buffer chamber, the first valve 332 closes in response to the closing signal of the controller to isolate the bottom output end of the temporary storage box 33 from the buffer chamber, and the second valve 333 opens in response to the opening signal sent by the controller to remove the dust in the buffer chamber. Optionally, the level detector 334 can be an infrared detector, an ultrasonic level meter, a microwave level meter or a weighing level meter. More preferably, in order to avoid interference, the level detector is arranged at the top of the drop channel.

[0051] In the specific processing process, when the dust particles are conveyed by the dust conveyor 32 to the head of the sealed shell 31, that is, the output end of the dust conveyor 32, the dust particles fall into the temporary storage box 33 at the output end of the dust conveyor 32. The temporary storage box 33 can store the dust particles conveyed for a certain period of time. The top of the material drop channel is provided with a material level detection device. When the material level reaches the set value, the material level detection device sends a signal, and the material in the material drop channel is discharged to the belt conveyor 34 for transportation, and then the first valve 332 and the second valve 333 are closed. In the present invention, a double valve configuration is adopted, the first valve 332 is opened first, and the dust particles fall into the buffer chamber between the two valves, and then the first valve 332 is closed, and the second valve 333 is opened, and the dust particles are discharged, which effectively avoids the air leakage of the buried scraper conveyor and improves the sealing of the smoke pipe channel 21.

[0052] Furthermore, the large flue floor-standing sintering machine system also includes a sintering machine ore bucket 40 arranged at the tail of the trolley track, a ring cooler feeding chute 50 arranged on the output side of the sintering machine ore bucket 40, and a ring cooler trolley 60 arranged on the output side of the ring cooler feeding chute 50, and the ring cooler trolley 60 is on the same horizontal plane as the large flue 20.

[0053] The beneficial effects of the present invention are as follows, please refer to Figure 1 and Figure 2 , the existing main plant design: take the 500 square meters sintering machine as an example: the diameter of the large flue is 5.2 mm, the bottom elevation is +7.0 meters, the center elevation is about +10.0 meters, and a chute and a double-layer ash discharge valve are set at its lower part. There is a sintering machine unloading bucket at the tail of the sintering machine, and the feeding chute of the ring cooler is immediately below it. The sintered ore enters the surface of the ring cooler trolley through the unloading bucket and the feeding chute. The track of the ring cooler trolley is elevated at an elevation of +3.8 meters to match the height of the main plant. Please refer to Figure 3 and Figure 4 The present invention places the smoke duct channel 21 at an elevation of ±0.0 meters, that is, the smoke duct channel 21 is supported on the ground, with a center elevation of about +3.0 meters, and the lower chute and double-layer ash discharge valve are cancelled and replaced with a dust transfer and collection mechanism 30. At the same time, the heights of the sintering unloading hopper and the annular cooler feeding chute are adjusted; taking a 500-square-meter sintering machine as an example: the height of the large flue is reduced by 7 meters; the height of the sintering machine unloading hopper is compressed by 1.2 meters, the feeding chute is compressed by 2 meters, and the annular cooler track and trolley are also placed on the ±0.0 plane, compressed by 3.8 meters, and compressed by 7 meters in total, just matching the 7-meter height reduction of the large flue. The main plant structure is lowered, and the civil engineering cost of the entire plant is reduced, which is more advantageous in areas with high seismic intensity; the smoke pipe channel 21 is placed on the ground, which is more convenient to install; the buried scraper conveyor replaces the chute and the double-layer ash discharge valve, avoiding the failure of the double-layer ash discharge valve due to material reasons, reducing failures and reducing air leakage rate; by adjusting the size of the sintering machine unloading bucket and the ring cooler feeding chute, and adjusting the elevation of the ring cooler track at the same time, the ring cooler track is also placed on the ±0.0 plane, which reduces the weight of the ring cooler steel structure, reduces costs, and is more convenient for the maintenance and replacement of the ring cooler trolley; the amount of earthwork construction and steel structure manufacturing is reduced, and the construction progress of the entire sintering machine is accelerated, which is convenient for early production and creation of production benefits; the buried scraper conveyor operates intermittently according to the production situation, saving energy; the head unloading valve of the buried scraper conveyor is opened according to the material level signal, and the entire buried scraper conveyor is in a closed state when it is not opened, which effectively avoids air leakage in the large flue and reduces the air leakage rate of the entire sintering machine system.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A floor-standing large flue system for a sintering machine, characterized in that: It comprises a large flue (20) extending along the length direction of a sintering machine body (10) and a dust transport and collection mechanism (30) arranged at the dust output side of the bottom of the large flue (20); wherein the large flue is directly laid on the ground in a floor-standing manner; A drop hole (211) for dropping dust is provided at the bottom of the large flue (20), and a plurality of the drop holes (211) are arranged at intervals along the extension direction of the large flue (20); The dust transfer and collection mechanism (30) is arranged in a trench dug on the ground, and is used to transfer and collect the dust discharged from the discharge hole (211) of the large flue (20); The dust transfer and collection mechanism (30) comprises a sealed shell (31) and a dust conveyor (32) arranged along the extension direction of the large flue (20); the sealed shell (31) is sealedly connected to the outer wall surface of the bottom of the large flue (20) to form a sealed channel; the drop hole (211) is sealedly connected to the sealed channel; the dust conveyor (32) is arranged in the sealed shell (31); at least one end of the sealed shell (31) is provided with a temporary storage box (33) for collecting dust; the output end of the dust conveyor (32) extends into the accommodating cavity of the temporary storage box (33); the dust discharged from the drop hole (211) of the large flue (20) is transferred to the temporary storage box (33) for collection through the dust conveyor (32).

2. The floor-standing large flue system for a sintering machine according to claim 1, characterized in that: The large flue (20) comprises a smoke pipe channel (21) and mounting brackets (22) provided on both sides of the smoke pipe channel (21) and used for supporting the smoke pipe channel (21) from the ground. The drop hole (211) is provided at the bottom of the smoke pipe channel (21), and the sealing shell (31) is sealedly connected to the outer wall surface of the bottom of the smoke pipe channel (21).

3. The floor-standing large flue system for a sintering machine according to claim 2, characterized in that: The cross-section of the sealing shell (31) is a rectangular shape with an upper opening, and the sealing shell (31) is sealedly connected to the outer wall surface of the bottom of the smoke pipe channel (21) via a flange to form the sealed channel; The temporary storage box (33) is connected to the sealed passage in a sealed manner.

4. The floor-standing large flue system for a sintering machine according to claim 2 or 3, characterized in that: The temporary storage boxes (33) are respectively provided at both ends of the sealed housing (31), the number of the dust conveyors (32) is multiple, and the multiple dust conveyors (32) are arranged at intervals along the width direction of the sealed housing (31). At least one of the dust conveyors (32) moves along a first conveying track to transport the dust discharged from the drop hole (211) of the smoke pipe channel (21) to the temporary storage box (33) at one end of the sealed housing (31) for collection. At least one of the dust conveyors (32) moves along a second conveying trajectory to transport the dust discharged from the discharge hole (211) of the smoke pipe channel (21) to the temporary storage box (33) at the other end of the sealed shell (31) for collection.

5. The floor-standing large flue system for a sintering machine according to claim 4, characterized in that: The sealed housing (31) is arranged in the trench pre-dug at the lower side of the smoke pipe channel (21); the trench extends downward corresponding to the position of the temporary storage box (33) and is provided with a vertical extension groove; the temporary storage box (33) is installed in the vertical extension groove.

6. The floor-standing large flue system for a sintering machine according to claim 5, characterized in that: The temporary storage box (33) includes a material dropping channel arranged vertically, the top input end of the material dropping channel is connected to the output end of the dust conveyor (32), the transmission pipeline of the material dropping channel extends vertically downward, and the bottom of the transmission pipeline is provided with an output port, and the dust transport collection mechanism (30) also includes a belt conveyor (34) arranged at the output port for conveying the dust discharged from the material dropping channel; A guide plate (331) is provided at the top input end of the material dropping channel for guiding the dust output by the dust conveyor (32) into the material dropping channel, so that the dust output by the dust conveyor (32) slides into the temporary storage box (33) by its own inertia force and gravity.

7. The floor-standing large flue system for a sintering machine according to claim 6, characterized in that: A first valve (332) and a second valve (333) arranged vertically at intervals are provided at the bottom output end of the discharge channel, and the first valve (332), the second valve (333) and the transmission pipeline enclose a discharge buffer chamber.

8. The floor-type large flue system for a sintering machine according to claim 7, characterized in that: The first valve (332) and the second valve (333) are both electrically controlled valves. The dust conveyor (32) further comprises a controller and a material level detector (334), wherein the material level detector (334) is used to detect the amount of dust stored in the temporary storage box (33) and send a material level detection signal to the controller, the controller is used to receive the material level detection signal and send an opening or closing signal to the first valve (332), and the controller is also used to send an opening or closing signal to the second valve (333). The first valve (332) opens in response to an opening signal sent by the controller to allow dust to fall into the buffer chamber. The first valve (332) closes in response to a closing signal sent by the controller to isolate the bottom output end of the temporary storage box (33) from the buffer chamber. The second valve (333) opens in response to an opening signal sent by the controller to discharge dust from the buffer chamber.

9. A main building of a sintering machine, comprising a sintering machine body (10) erected above the ground, characterized in that: It also includes a floor-standing large flue system as claimed in any one of claims 1 to 8; wherein the height between the sintering machine body (10) and the ground matches the diameter of the large flue.

10. The main plant of the sintering machine according to claim 9, characterized in that: It also includes a sintering machine ore bucket (40) arranged at the tail of the trolley track, an annular cooler feeding chute (50) arranged at the output side of the sintering machine ore bucket (40), and an annular cooler trolley (60) arranged at the output side of the annular cooler feeding chute (50). The ring cooler trolley (60) and the large flue (20) are on the same horizontal plane.

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