CN111207410A

CN111207410A - Hot air combustion-supporting system of ignition furnace of sintering machine

Info

Publication number: CN111207410A
Application number: CN202010023795.3A
Authority: CN
Inventors: 兰向东; 郭正富; 袁志明
Original assignee: Sichuan Dianshi Energy Co Ltd
Current assignee: Sichuan Dianshi Energy Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-05-29

Abstract

The invention relates to a hot air combustion-supporting system of an ignition furnace of a sintering machine, belonging to the technical field of combustion-supporting of ignition furnaces, and comprising a frame, a sintering machine body and an ignition furnace, wherein the ignition furnace is communicated with a combustion-supporting air pipe, a feed opening is arranged at the tail of the sintering machine body, an air suction cover is arranged on the frame and is positioned right above the feed opening, an air suction pipe is communicated between the air suction cover and the combustion-supporting air pipe, and an air blower communicated with the air suction pipe is arranged on the frame. Sintered materials generated after the sintering machine body works are discharged through the discharging opening, and the temperature of air near the discharging opening is higher due to the very high temperature of the sintered materials; when the ignition furnace works, the blower works, so that air near the feed opening is sucked into the air suction cover, is introduced into the combustion-supporting air pipe through the air suction pipe and finally is introduced into the ignition furnace, the ignition temperature is improved to the maximum extent, the coal gas consumption of the ignition furnace is reduced, and fuel is saved.

Description

Hot air combustion-supporting system of ignition furnace of sintering machine

Technical Field

The invention relates to the technical field of ignition furnace combustion supporting, in particular to a hot air combustion supporting system of an ignition furnace of a sintering machine.

Background

The existing ignition furnace usually uses blast furnace gas as ignition fuel, and in recent years, high-calorific-value gas is adopted to replace low-calorific-value gas, so that the aims of saving energy and reducing consumption are fulfilled. The good gas saving effect is achieved in both theoretical and practical production.

Chinese patent application publication No. CN106440810A discloses a sintering machine, which comprises a sintering pallet, on which a sintering raw material bed layer containing solid fuel moves; the igniter is positioned at the front part above the sintering trolley; the air shielding cover is positioned at the rear part above the sintering trolley; the air box is positioned below the sintering trolley and used for collecting the combusted flue gas and connecting a flue gas pipeline for discharging the flue gas; the at least one fuel gas inlet is positioned at the top of the air shielding cover and is respectively connected with respective fuel gas supply pipelines; and the gas injection controller is arranged on at least one gas supply pipeline and used for controlling the gas injection amount entering the gas inlet.

The above prior art has the following defects that the igniter needs to be charged with air for supporting combustion when working, the combustion-supporting air temperature is different, the sintering ignition and the fuel utilization rate are influenced, the higher the air temperature is, the better the ignition effect is, and the less the fuel consumption is. However, when the igniter works, if outside air is directly used as combustion-supporting air, the air temperature is low, the ignition combustion-supporting effect is poor, and the fuel consumption is large; if the air is preheated in advance, the energy consumption is undoubtedly increased; there are certain drawbacks.

Disclosure of Invention

The invention aims to provide a hot air combustion-supporting system of an ignition furnace of a sintering machine, which has the advantages of improving the ignition effect and reducing the energy consumption.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a hot-blast combustion-supporting system of sintering machine ignition furnace, includes frame, sintering machine body and ignition furnace, the ignition furnace intercommunication has combustion-supporting tuber pipe, the tail department of sintering machine body is provided with the feed opening, be provided with the cover that induced drafts in the frame, the cover that induced drafts is located the feed opening directly over, it has the breathing pipe to communicate between cover and the combustion-supporting tuber pipe to induced draft, be provided with the air-blower with the breathing pipe intercommunication in the frame.

By adopting the technical scheme, the sintered materials generated after the sintering machine body works are discharged through the feed opening, and the temperature of the air near the feed opening is higher due to the very high temperature of the sintered materials; when the ignition furnace works, the blower works, so that air near the feed opening is sucked into the air suction cover, is introduced into the combustion-supporting air pipe through the air suction pipe and finally is introduced into the ignition furnace, the ignition temperature is improved to the maximum extent, the coal gas consumption of the ignition furnace is reduced, and fuel is saved.

The present invention in a preferred example may be further configured to: the air suction pipe is communicated with an air inlet pipe, and an air mixing valve for adjusting air temperature is arranged on the air inlet pipe.

Through adopting above-mentioned technical scheme, realize adjusting the effect of air-supply line amount of wind through mixing the blast valve for the interior steam mixing of air and the air-suction line in external reduces the temperature of steam and increases the content of oxygen, with the best temperature value of adjusting the work of ignition furnace with the steam temperature, improves the effect of igniteing.

The present invention in a preferred example may be further configured to: the cyclone dust collector is arranged between the air mixing valve and the air blower.

By adopting the technical scheme, the cyclone dust collector is arranged, so that the content of sintering material dust in the air suction pipe is reduced, and the dust is prevented from blocking a combustion nozzle of the ignition furnace; meanwhile, the purpose of recovering the dust of the sintering material is achieved; the cyclone dust collector is arranged between the air mixing valve and the air blower, so that the effects of cooling firstly and then removing dust are achieved, and the heat loss during dust removal is reduced.

The present invention in a preferred example may be further configured to: the cyclone dust collector comprises a cyclone tube and a dust collecting hopper, wherein an air inlet is formed in the side wall of the cyclone tube, an air outlet tube is fixedly arranged on the top wall of the cyclone tube and is coaxial with the cyclone tube, openings are formed in two ends of the air outlet tube, an air outlet is formed in the top end of the air outlet tube, the air outlet is communicated with the input end of an air blower, and the air inlet is communicated with the output end of an air mixing valve; the bottom of the cyclone tube is communicated with a dust hopper, and the dust hopper is provided with a valve.

By adopting the technical scheme, hot air containing dust enters the cyclone tube through the air inlet, an annular flow passage is formed between the cyclone tube and the air outlet tube, so that the hot air rotates, the dust falls to the bottom of the cyclone tube and is gathered in the dust hopper under the action of centrifugal force, and the hot air is discharged through the air outlet; the dust in the dust hopper can be discharged by opening the valve, most of the dust is sintered materials, and the dust can be recycled, so that the waste of resources is reduced.

The present invention in a preferred example may be further configured to: the cyclone tube is provided with a plurality of cyclone tubes, and the air outlet of each cyclone tube is communicated with the air inlet of the next cyclone tube in sequence.

By adopting the technical scheme, a plurality of cyclone tubes are arranged, so that the dust removal effect is effectively improved.

The present invention in a preferred example may be further configured to: the dust hopper is internally provided with an arch breaking assembly for breaking an arch, the arch breaking assembly comprises a rotating shaft, a rotating rod and a driving motor, the dust hopper comprises a top plate and a shell, the rotating shaft penetrates through the top plate and extends into the dust hopper, the rotating rod is arranged on the rotating shaft, the driving motor is fixedly arranged on the top plate, and the driving motor is in transmission connection with the rotating shaft.

Through adopting above-mentioned technical scheme, when opening valve discharge sintering material dust, start driving motor, driving motor drives the pivot and rotates, and the pivot drives the bull stick and rotates, stirs the dust, prevents that the dust from blockking up in the exit of dust hopper, improves emission efficiency simultaneously.

The present invention in a preferred example may be further configured to: the dust collecting device is characterized in that a first supporting rod and a second supporting rod are connected between the rotating rod and the rotating shaft, bristles which are used for abutting against the inner wall of the dust collecting hopper are arranged on the rotating rod, and the bristles are arranged along the length direction of the rotating rod.

By adopting the technical scheme, when the rotating shaft drives the rotating rod to rotate, the bristles are driven to move along the dust collecting hopper, so that dust attached to the inner wall of the dust collecting hopper is cleaned, and excessive dust accumulation on the inner wall of the dust collecting hopper is prevented.

The present invention in a preferred example may be further configured to: the first support rod is positioned below the second support rod, the first support rod is fixedly arranged on the rotating shaft, and one end of the first support rod, which is far away from the rotating shaft, is hinged with the rotating rod; the spout has been seted up along the axial of pivot to the roof of pivot, the bar hole has been seted up along the axial of pivot to the lateral wall of pivot, bar hole and spout intercommunication, it wears to be equipped with the actuating lever to slide in the spout, it is provided with the slider to slide in the bar hole, the actuating lever rotates with the slider to be connected, first branch is articulated with the slider, the one end that the pivot was kept away from to first branch is articulated with the bull stick, be provided with on the roof and be used for driving the gliding driving piece of actuating lever.

Through adopting above-mentioned technical scheme, when the dust of clearance dust hopper inner wall, through driving piece drive actuating lever lapse, the actuating lever drives slider edgewise slotted hole lapse, and the slider drives first branch and takes place to deflect, and the upper end that drives the bull stick deflects to the inner wall that is close to the dust hopper, and the inner wall conflict of brush hair and dust hopper, drive pivot rotate, can realize the purpose of the dust of being stained with in the clearance dust hopper of attaching.

The present invention in a preferred example may be further configured to: the shell is detachably arranged on the top plate.

Through adopting above-mentioned technical scheme, can dismantle the setting on the roof with the casing, be convenient for maintain broken subassembly of encircleing.

In summary, the invention includes at least one of the following beneficial effects:

firstly, discharging sintered materials generated after the sintering machine body works through a feed opening, wherein the temperature of air near the feed opening is higher due to the very high temperature of the sintered materials; when the ignition furnace works, the blower works, so that air near the feed opening is sucked into the air suction cover, is introduced into the combustion-supporting air pipe through the air suction pipe and finally is introduced into the ignition furnace, the ignition temperature is improved to the maximum extent, the coal gas consumption of the ignition furnace is reduced, and fuel is saved;

secondly, the effect of adjusting the air quantity of the air inlet pipe is achieved through the air mixing valve, so that the outside air is mixed with the hot air in the air inlet pipe, the temperature of the hot air is reduced, the content of oxygen is increased, the temperature of the hot air is adjusted to the optimal working temperature value of the ignition furnace, and the ignition effect is improved;

when the valve is opened to discharge the dust of the sintering material, the driving motor is started, the driving motor drives the rotating shaft to rotate, the rotating shaft drives the rotating rod to rotate, the dust is stirred, the dust is prevented from being blocked at the outlet of the dust collecting hopper, and meanwhile, the discharge efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a cross-sectional view of a cyclone of the present invention;

FIG. 3 is a cross-sectional view of the air mixing valve of the present invention;

figure 4 is a cross-sectional view of a dust hopper of the present invention.

Reference numerals: 1. a frame; 2. a sintering machine body; 21. an ignition furnace; 211. a combustion-supporting air duct; 22. a feeding port; 3. an air intake duct; 31. an air suction hood; 32. a blower; 4. an air inlet pipe; 41. a mixing valve; 411. a valve body; 412. an adjusting plate; 413. a servo motor; 5. a cyclone dust collector; 51. a cyclone tube; 511. an air inlet; 512. an air outlet pipe; 52. a dust collecting hopper; 521. a valve; 522. a top plate; 523. a housing; 6. an arch breaking assembly; 61. a rotating shaft; 611. a chute; 6111. a drive rod; 612. a strip-shaped hole; 6121. a slider; 62. a rotating rod; 621. brushing; 63. a drive motor; 71. a first support bar; 72. a second support bar; 8. a fixed mount; 81. a drive member; 91. a first gear; 92. a second gear; 10. and (4) bolts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the hot air combustion-supporting system of the ignition furnace of the sintering machine comprises a frame 1, a sintering machine body 2 and an ignition furnace 21, wherein the ignition furnace 21 is communicated with a combustion-supporting air pipe 211, and a feed opening 22 is arranged at the tail of the sintering machine body. An air suction cover 31 is arranged on the frame 1, the air suction cover 31 is positioned right above the feed opening 22, an air suction pipe 3 is communicated between the air suction cover 31 and the combustion-supporting air pipe 211, and an air blower 32 communicated with the air suction pipe 3 is arranged on the frame 1.

As shown in fig. 2 and 3, the air intake pipe 3 is communicated with an air intake pipe 4, the air intake pipe 4 is provided with an air mixing valve 41 for adjusting the air temperature, and the air mixing valve 41 includes a valve body 411, an adjusting plate 412 and a servo motor 413. The adjusting plate 412 is rotatably disposed in the valve body 411, the adjusting plate 412 is circular and attached to the inner wall of the valve body 411, the servo motor 413 is fixedly disposed on the outer wall of the valve body 411, and an output shaft of the servo motor 413 is fixedly connected to the adjusting plate 412.

The effect of adjusting the air quantity of the air inlet pipe 4 is achieved through the air mixing valve 41, so that the external air is mixed with hot air in the air inlet pipe, the temperature of the hot air is reduced, the content of oxygen is increased, the temperature of the hot air is adjusted to the optimal working temperature value of the ignition furnace 21, and the ignition effect is improved. In the present application, the hot gas temperature is adjusted to 300 ℃ by the air mixing valve 41.

As shown in fig. 2, a cyclone 5 is disposed on the frame 1, and the cyclone 5 is disposed between the air mixing valve 41 and the blower 32. The cyclone 5 includes a cyclone tube 51 and a dust collection hopper 52. The bottom of the cyclone tube 51 communicates with the dust hopper 52, the dust hopper 52 is provided with a valve 521, and the dust hopper 52 has a circular cross-section.

As shown in fig. 2, an air inlet 511 is formed in the side wall of the cyclone tube 51, an air outlet tube 512 is fixedly disposed on the top wall of the cyclone tube 51, the air outlet tube 512 is coaxial with the cyclone tube 51, two ends of the air outlet tube 512 are open, and an opening at the top end of the air outlet tube 512 is an air outlet. The air outlet is communicated with the input end of the air blower 32, and the air inlet 511 is communicated with the output end of the air mixing valve 41. The cyclone tubes 51 are provided in plurality, and the air outlets of the cyclone tubes 51 are sequentially communicated with the air inlets 511 of the next cyclone tube 51. The four cyclone tubes 51 are vertically arranged and circumferentially distributed above the dust removing hopper.

The cyclone dust collector 5 is arranged to reduce the content of sintering material dust in the air suction pipe 3 and prevent the dust from blocking a burner nozzle of the ignition furnace 21; meanwhile, the purpose of recovering the dust of the sintering material is achieved; the cyclone dust collector 5 is arranged between the air mixing valve 41 and the blower 32, so that the effects of cooling firstly and then removing dust are achieved, and the heat loss during dust removal is reduced. The hot air containing dust enters the cyclone tube 51 through the air inlet 511, an annular flow passage is formed between the cyclone tube 51 and the air outlet tube 512, so that the hot air rotates, the dust falls to the bottom of the cyclone tube 51 and is gathered in the dust hopper 52 under the action of centrifugal force, and the hot air is discharged through the air outlet; the dust in the dust hopper 52 can be discharged by opening the valve 521, most of the dust is sintered materials, the dust can be recycled, and the waste of resources is reduced.

As shown in fig. 2 and 3, an arch breaking assembly 6 for breaking an arch is arranged in the dust hopper 52, and the arch breaking assembly 6 comprises a rotating shaft 61, a rotating rod 62 and a driving motor 63. The dust hopper 52 includes a top plate 522 and a housing 523, and the housing 523 is detachably provided on the top plate 522. Referring to fig. 4, in the present embodiment, the housing 523 is fixedly connected to the top plate 522 by the bolt 10.

As shown in fig. 2 and 3, the rotating shaft 61 is rotatably disposed on the top plate 522 and extends into the dust hopper 52, and the rotating rod 62 is disposed on the rotating shaft 61; the driving motor 63 is fixedly arranged on the top plate 522, and the driving motor 63 is in transmission connection with the rotating shaft 61. A first gear 91 is coaxially and fixedly arranged on the rotating shaft 61, a second gear 92 is coaxially and fixedly arranged on an output shaft of the driving motor 63, and the first gear 91 is meshed with the second gear 92.

When the valve 521 is opened to discharge the dust of the sintering material, the driving motor 63 is started, the driving motor 63 drives the second gear 92 to rotate, and the second gear 92 drives the first gear 91 to rotate; and then the rotating shaft 61 is driven to rotate, the rotating shaft 61 drives the rotating rod 62 to rotate, the dust is stirred, the dust is prevented from being blocked at the outlet of the dust hopper 52, and meanwhile, the discharge efficiency is improved.

As shown in fig. 2 and 4, a first support rod 71 and a second support rod 72 are connected between the rotating rod 62 and the rotating shaft 61, bristles 621 which are used for abutting against the inner wall of the dust hopper 52 are arranged on the rotating rod 62, the bristles 621 are made of steel, and the bristles 621 are arranged along the length direction of the rotating rod 62. The first strut 71 is located below the second strut 72, and the length of the first strut 71 is less than the length of the second strut 72. The first supporting rod 71 is vertically and fixedly arranged on the rotating shaft 61, and one end of the first supporting rod 71, which is far away from the rotating shaft 61, is hinged with the rotating rod 62.

As shown in fig. 4, a sliding groove 611 is formed in the top wall of the rotating shaft 61 along the axial direction of the rotating shaft 61, a strip-shaped hole 612 is formed in the side wall of the rotating shaft 61 along the axial direction of the rotating shaft 61, the strip-shaped hole 612 is communicated with the sliding groove 611, a driving rod 6111 is slidably disposed in the sliding groove 611, and a slider 6121 is slidably disposed in the strip-shaped hole 612. The driving rod 6111 is rotatably connected to the sliding block 6121, the first supporting rod 71 is hinged to the sliding block 6121, one end of the first supporting rod 71, which is away from the rotating shaft 61, is hinged to the rotating rod 62, a driving member 81 for driving the driving rod 6111 to slide is disposed on the top plate 522, and the driving member 81 is an air cylinder. A fixing frame 8 is fixedly arranged on the top plate 522, the air cylinder is vertically and fixedly arranged on the fixing frame 8, and a piston rod of the air cylinder is coaxially and fixedly connected with the driving rod 6111.

When the sliding block 6121 abuts against the bottom of the strip-shaped hole 612, the second supporting rod 72 is in a state of being perpendicular to the rotating shaft 61, at this time, the rotating rod 62 is parallel to the inner wall of the dust hopper 52, and the bristles 621 abut against the inner wall of the dust hopper 52. When the dust on the inner wall of the dust hopper 52 is cleaned, the driving rod 6111 is driven to slide downwards by the driving part 81, the driving rod 6111 drives the sliding block 6121 to slide downwards along the strip-shaped hole 612, the sliding block 6121 drives the first supporting rod 71 to deflect, the upper end of the rotating rod 62 is driven to deflect towards the inner wall close to the dust hopper 52 until the bristles 621 abut against the inner wall of the dust hopper 52, and the rotating shaft 61 is driven to rotate, so that the purpose of cleaning the dust adhered to the dust hopper 52 can be achieved.

The implementation principle is as follows: the sintered material generated after the operation of the sintering machine body 2 is discharged through the feed opening 22, and the temperature of the air near the feed opening 22 is high due to the high temperature of the sintered material. When the ignition furnace works, the blower 32 works, so that air near the feed opening 22 is sucked into the air suction hood 31, the temperature is controlled to 300 ℃ through the air mixing valve 41, then the air is introduced into the combustion-supporting air pipe 211 through the air suction pipe and finally introduced into the ignition furnace 21, the ignition temperature is improved to the maximum extent, the coal gas consumption of the ignition furnace 21 is reduced, and the fuel is saved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a hot-blast combustion-supporting system of sintering machine ignition furnace, includes frame (1), sintering machine body (2) and ignition furnace (21), ignition furnace (21) intercommunication has combustion-supporting tuber pipe (211), the tail department of sintering machine body (2) is provided with feed opening (22), its characterized in that: the improved energy-saving furnace is characterized in that an air suction cover (31) is arranged on the frame (1), the air suction cover (31) is located right above the feed opening (22), an air suction pipe (3) is communicated between the air suction cover (31) and the combustion-supporting air pipe (211), and an air blower (32) communicated with the air suction pipe (3) is arranged on the frame (1).

2. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 1, characterized in that: an air inlet pipe (4) is communicated with the air suction pipe (3), and an air mixing valve (41) used for adjusting the air temperature is arranged on the air inlet pipe (4).

3. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 2, characterized in that: the air mixing device is characterized by further comprising a cyclone dust collector (5), wherein the cyclone dust collector (5) is arranged between the air mixing valve (41) and the air blower (32).

4. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 3, characterized in that: the cyclone dust collector (5) comprises a cyclone tube (51) and a dust collecting hopper (52), an air inlet (511) is formed in the side wall of the cyclone tube (51), an air outlet tube (512) is fixedly arranged on the top wall of the cyclone tube (51), the air outlet tube (512) is coaxial with the cyclone tube (51), openings are formed in two ends of the air outlet tube (512), an opening in the top end of the air outlet tube (512) is an air outlet, the air outlet is communicated with the input end of an air blower (32), and the air inlet (511) is communicated with the output end of the air mixing valve (41); the bottom of the cyclone tube (51) is communicated with a dust hopper (52), and the dust hopper (52) is provided with a valve (521).

5. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 4, characterized in that: the number of the cyclone tubes (51) is multiple, and the air outlets of the cyclone tubes (51) are sequentially communicated with the air inlet (511) of the next cyclone tube (51).

6. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 5, characterized in that: the novel dust collection hopper is characterized in that an arch breaking assembly (6) for breaking an arch is arranged in the dust collection hopper (52), the arch breaking assembly (6) comprises a rotating shaft (61), a rotating rod (62) and a driving motor (63), the dust collection hopper (52) comprises a top plate (522) and a shell (523), the rotating shaft (61) penetrates through the top plate (522) and extends into the dust collection hopper (52), the rotating rod (62) is arranged on the rotating shaft (61), the driving motor (63) is fixedly arranged on the top plate (522), and the driving motor (63) is in transmission connection with the rotating shaft (61).

7. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 6, characterized in that: a first support rod (71) and a second support rod (72) are connected between the rotating rod (62) and the rotating shaft (61), bristles (621) used for abutting against the inner wall of the dust hopper (52) are arranged on the rotating rod (62), and the bristles (621) are arranged along the length direction of the rotating rod (62).

8. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 7, characterized in that: the first support rod (71) is positioned below the second support rod (72), the first support rod (71) is fixedly arranged on the rotating shaft (61), and one end, far away from the rotating shaft (61), of the first support rod (71) is hinged to the rotating rod (62); the top wall of pivot (61) has seted up spout (611) along the axial of pivot (61), bar hole (612) have been seted up along the axial of pivot (61) to the lateral wall of pivot (61), bar hole (612) and spout (611) intercommunication, it wears to be equipped with actuating lever (6111) to slide in spout (611), it is provided with slider (6121) to slide in bar hole (612), actuating lever (6111) rotates with slider (6121) to be connected, first branch (71) are articulated with slider (6121), the one end that pivot (61) were kept away from in first branch (71) is articulated with bull stick (62), be provided with on roof (522) and be used for driving gliding driving piece (81) of actuating lever (6111).

9. The hot air combustion-supporting system of the ignition furnace of the sintering machine according to claim 6 or 8, characterized in that: the shell (523) is detachably arranged on the top plate (522).