CN113218196A - Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine - Google Patents
Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine Download PDFInfo
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- CN113218196A CN113218196A CN202110661065.0A CN202110661065A CN113218196A CN 113218196 A CN113218196 A CN 113218196A CN 202110661065 A CN202110661065 A CN 202110661065A CN 113218196 A CN113218196 A CN 113218196A
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- sealing cover
- flue gas
- sintering machine
- flue
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a bilateral air inlet gas premixing sealing cover and a circulation system of sintering machine flue gas, wherein the bilateral air inlet gas premixing sealing cover comprises a sealing cover body, two symmetrically arranged circulating flue gas inlet pipes are connected to the same cross section of the periphery of the sealing cover body, the gas inlet pipes extend into the sealing cover body, branch pipes and gas distribution rings are arranged in the sealing cover body, the gas inlet pipes and the branch pipes are distributed in a T shape, the gas distribution rings are symmetrically connected to the two ends of the branch pipes, and each gas distribution ring corresponds to one circulating flue gas inlet pipe. In the invention, the gas premixing sealing cover with double-side gas inlet effectively avoids the overflow of smoke gas caused by over-high local pressure, and improves the capacity of the sintering table top for absorbing the smoke gas, thereby reducing CO on the premise of ensuring the quality of sintered mineral products2Discharging, and safely and efficiently realizing the high-proportion flue gas circulation of more than 30 percent.
Description
Technical Field
The invention belongs to the technical field of sintering production in the metallurgical industry, relates to a sealing cover and a flue gas circulating system, and particularly relates to a bilateral gas inlet gas premixing sealing cover and a circulating system for flue gas of a sintering machine.
Background
The sintering flue gas circulation technology is characterized in that after being simply purified, part of combusted waste gas returns to a sintering charge level to participate in the sintering process again, the proportion of the recycled waste gas is higher, the emission reduction of the discharged flue gas quantity of a sintering machine is more obvious, but along with the improvement of the proportion of the recycled flue gas, a large amount of waste gas which participates in primary combustion returns to the sintering charge level, so that excessive circulating air is difficult to absorb by the sintering charge level, meanwhile, the oxygen content in the circulating waste gas is too low, so that the fuel combustion in the sintering process is insufficient, the temperature of a bed layer is reduced, and the sintering production process is seriously influenced.
CN108168324A discloses a sintering flue gas circulation cover and sintering system that flow equalizes, flow equalize the cover including the flue gas distribution district that from top to bottom communicates in proper order, flue gas water conservancy diversion district and flue gas receiving area, the middle part and the flue gas admission line in flue gas distribution district are linked together, the flue gas distribution district includes first section and the second section about its intermediate position symmetry, the cross sectional dimension of first section and second section reduces along the direction of keeping away from flue gas distribution district intermediate position gradually, be equipped with a plurality of risers that can make the perpendicular downward flow of flue gas in the flue gas water conservancy diversion district, the bottom in flue gas receiving area is equipped with the opening that leads to sintering pallet charge level. The invention optimizes the structures of the smoke distribution area and the smoke diversion area, and the smoke reaches the smoke receiving area after being subjected to pressure equalizing and diversion by the smoke distribution area and the smoke diversion area, thereby ensuring that the smoke uniformly flows on the trolley surface, avoiding the phenomenon of non-uniform airflow in the cover, leading the smoke to be stably sent out and creating conditions for stably absorbing the smoke by sintering materials.
CN105066700B discloses a sealing hot air hood device and application thereof, comprising a flue gas hood arranged at the part of the sintering machine using circulating flue gas and covering the sintering machine, wherein the top of the flue gas hood is provided with a circulating air inlet pipe which is provided with a stop valve; emergency vent holes are formed in the two sides of the flue gas cover, and an electric valve is mounted on the emergency vent holes; and gaps between the front end surface and the rear end surface of the flue gas cover and the surface of the sinter bed are sealed. The invention can obviously reduce the normal temperature air leaking into the flue gas hood, ensure the sintering flue gas circulation effect and simultaneously improve the uniformity of the gas in the flue gas hood.
CN110553516A discloses an oxygen-enriched sintering flue gas circulation system and application thereof, wherein the oxygen-enriched sintering flue gas circulation system comprises a sintering machine, a first dust remover, a first fan, an oxygen adding system, a second dust remover, a second fan and a post-processing unit; the oxygen adding system enables oxygen to be uniformly mixed with the circulating flue gas, so that the stability of sintering yield and quality is ensured; the detection unit detects the oxygen content in the circulating flue gas in real time, the control unit adjusts the addition amount of the oxygen, detects the oxygen content in the mixed flue gas in real time, and feeds back and adjusts the flow adjusting device through the control unit, so that the oxygen content of the circulating flue gas is 18-30%. The oxygen adding system disclosed by the invention is simple in structure, can accurately and quickly adjust the oxygen flow, avoids the defect of reduction of the circulating flue gas flow caused by externally adding ring-cooling waste gas or air, and can improve the flue gas circulation rate to 60% to the maximum extent, so that the flue gas emission reduction effect is improved.
Aiming at the problem of flow field distribution in the sealing cover, the prior art proposes that the flow field distribution in the sealing cover is optimized through the forms of sealing, flow guiding and the like so as to absorb more circulating smoke, but when the smoke circulation proportion is increased to be more than 30%, the smoke quantity is huge, smoke impact kinetic energy forms vortex in the sealing cover, and the situation of smoke overflow due to overhigh local pressure inevitably occurs. Aiming at the problem of insufficient oxygen content of circulating flue gas, the prior art provides that oxygen-enriched gas is supplemented to meet the requirement of solid combustion oxygen demand, the economic cost is high, and the concentration and the using amount of oxygen to be supplemented need to be greatly increased along with the increase of the flue gas circulation proportion.
Based on the problems, aiming at a system with high-proportion circulation of more than 30%, a bilateral gas inlet gas premixing sealing cover needs to be researched and developed, the flow field distribution of the flue gas in the sealing cover is optimized by skillfully utilizing the kinetic energy of the circulating flue gas, the gas premixing effect is enhanced, the absorption capacity of the circulating flue gas is improved, and the combustion oxygen demand of a sintering bed layer is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the inventionThe invention aims to provide a bilateral air inlet gas premixing sealing cover and a circulation system of sintering machine flue gas, in the invention, the air inlet mode of the bilateral air inlet gas premixing sealing cover is bilateral air inlet, the overflow of flue gas caused by overhigh local pressure is effectively avoided, the flue gas consumption capacity of a sintering table top is improved by adjusting the positions of two circulating flue gas inlet pipes, a gas distribution ring is arranged at a circulating flue gas outlet of the bilateral air inlet gas premixing sealing cover, and the full mixing of the gas and the circulating flue gas is further realized by opposite impact diffusion, so that the CO is reduced on the premise of ensuring the quality of sintered ore products2Discharging, and safely and efficiently realizing the high-proportion flue gas circulation of more than 30 percent.
In order to achieve the purpose, the invention adopts the following technical scheme:
the gas premixing sealing cover comprises a sealing cover body, two symmetrically arranged circulating flue gas inlet pipes are connected to the same cross section of the periphery of the sealing cover body, the gas inlet pipes extend into the sealing cover body, branch pipes and gas distribution rings are arranged in the sealing cover body, the gas inlet pipes and the branch pipes are distributed in a T shape, the gas distribution rings are symmetrically connected to the two ends of the branch pipes, and each gas distribution ring corresponds to one circulating flue gas inlet pipe.
In the invention, the gas inlet mode of the gas premixing sealing cover with bilateral gas inlet is bilateral gas inlet, so that the smoke overflow caused by overhigh local pressure is effectively avoided, the smoke absorbing capacity of the sintering table top is improved by adjusting the positions of the two circulating smoke inlet pipes, the circulating smoke outlet of the gas premixing sealing cover with bilateral gas inlet is provided with the gas distribution ring, and the full mixing of the gas and the circulating smoke is further realized by opposite impact diffusion, so that the CO is reduced on the premise of ensuring the quality of sintered mineral products2Discharging, and safely and efficiently realizing the high-proportion flue gas circulation of more than 30 percent.
In a preferred embodiment of the present invention, the sealing cap body has a dome shape.
It should be noted that the present invention does not specifically require and specially limit the structural features of the sealing cap body, such as size, material, etc., and the sealing cap body functions as a sealing container in the present invention, so it can be understood that other sealing cap bodies capable of achieving such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the sealing cap body according to the use scenario and test conditions.
As a preferable technical scheme of the invention, the circulating flue gas inlet pipe is butted with the sealing cover body through a reducing and expanding pipe section.
Preferably, the diameter of the reducing and expanding pipe section is gradually increased along the smoke flowing direction.
Preferably, the angle between the reducing-expanding pipe section and the horizontal plane is 15-75 °, for example, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 °, 75 °, but not limited to the listed values, and other values not listed in the range of the values are also applicable.
It should be noted that, the reducing-expanding pipe section described in the present invention may be referred to as an expanding section, the present invention does not specifically require and specially limit the characteristics of the reducing-expanding pipe section, such as size and material, and the reducing-expanding pipe section in the present invention functions to increase the contact surface between the flue gas and the bed layer and reduce the impact of the flue gas on the bed layer, so it can be understood that other reducing-expanding pipe sections capable of realizing such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the reducing-expanding pipe section according to the use scenario and the test condition.
As a preferable technical scheme of the invention, the gas inlet pipe is vertical to the horizontal plane.
Preferably, a gas supply pipe is connected to the inlet end of the gas inlet pipe.
Preferably, a regulating valve is arranged at the joint of the gas inlet pipe and the gas supply pipe.
It should be noted that the present invention does not specifically require and specially limit the size and material of the gas inlet pipe and the gas supply pipe, and the gas inlet pipe and the gas supply pipe function as a flow channel for flue gas in the present invention, so it can be understood that other gas inlet pipes and gas supply pipes capable of realizing such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the gas inlet pipe and the gas supply pipe according to the use scenario and the test condition.
It should be noted that, the present invention does not specifically require and specially limit the characteristics of the regulating valve, such as size, material, etc., and the regulating valve in the present invention functions to control the flow rate of the flue gas, so it can be understood that other regulating valves capable of achieving such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the regulating valve according to the use scenario and the test conditions.
As a preferred technical solution of the present invention, the gas distribution ring comprises at least one circle of circular pipes with holes.
Preferably, the perforated circular pipes are distributed in concentric circles.
Preferably, the number of the perforated circular pipes is 1 to 8 circles, for example, 1 circle, 2 circles, 3 circles, 4 circles, 5 circles, 6 circles, 7 circles, 8 circles, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the distance between the circular pipes with the holes is the same.
Preferably, the number of openings of each of the perforated circular tubes is the same.
It should be noted that, the present invention does not make specific requirements and specific limitations on the features of the perforated circular tube, such as size and material, etc., and the perforated circular tube in the present invention functions to circulate flue gas, which is determined according to the size of the flared section of the flue gas inlet tube and the amount of flue gas injected, so it can be understood that other perforated circular tubes capable of realizing such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the perforated circular tube according to the use scenario and test conditions.
In a preferred embodiment of the present invention, the included angle between the surface of the gas distribution ring and the axis of the circulating flue gas inlet pipe is 60 to 90 °, for example, 60 °, 65 °, 70 °, 75 °, 80 °, 85 °, 90 °, but not limited to the values listed above, and other values not listed above in this range are also applicable.
Preferably, the outlet end of the branch pipe is connected with the center of the gas distribution ring.
In a second aspect, the invention provides a circulation system of sintering machine flue gas, the circulation system comprises the bilateral-air-inlet gas premixing sealing cover, the circulation system also comprises a belt sintering machine and a circulation flue, the belt sintering machine is arranged at the lower end of the sealing cover body, the lower end of the belt sintering machine is connected with at least ten sintering machine air boxes, the sintering machine air boxes are connected with a main flue and the circulation flue, and the flue gas enters the circulation flue through the sintering machine air boxes to circulate, finally returns to the sealing cover body and is sprayed to the surface of the belt sintering machine.
As a preferable technical scheme of the invention, the circulating system also comprises a dust removal device and a circulating device.
Preferably, the main flue is connected with the dust removal device and the circulating device in sequence along the flue gas flow direction.
Preferably, the circulating device is a circulating fan.
It should be noted that, the present invention does not specifically require and specially limit the features of the dust removing device, such as size and material, etc., and the dust removing device in the present invention is used to purify flue gas, so it can be understood that other dust removing devices capable of achieving such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the dust removing device according to the use scenario and test conditions.
It should be noted that, the present invention does not specifically require and specially limit the features of the circulation device, such as size and material, etc., and the circulation device in the present invention functions to circulate the flue gas, so it can be understood that other circulation devices capable of achieving such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the circulation device according to the use scenario and test conditions.
In a preferred embodiment of the present invention, the straight tube section of the sintering device bellows is provided with a bellows switching valve.
It should be noted that, in the present invention, the bellows switching valve generally comprises two valves, one is a cut-off valve when the flue gas flows downwards, when the valve is closed, the valve cut off to the right is opened, the flue gas changes from the original downward flow into the main flue to the right flow, and enters the circulating flue, i.e. the flue gas enters the circulating system for recycling, otherwise when the right valve is closed, and the lower valve is opened, the flue gas enters the main flue, and the main flue is connected with the corresponding desulfurization and denitrification device to treat the flue gas and then is discharged through the chimney.
It should be noted that the present invention does not specifically require and limit the characteristics of the bellows switch valve such as size and material, and the bellows switch valve is used to control the flow rate of the flue gas circulation, so it can be understood that other bellows switch valves capable of achieving such functions can be used in the present invention, and those skilled in the art can adaptively adjust the size and material of the bellows switch valve according to the use scenario and the test condition.
As a preferred technical scheme of the invention, flue gas enters a circulating flue through a sintering machine bellows to circulate, finally returns to a sealing cover body, and is sprayed to the surface of a belt sintering machine to sinter, so that one circulation is completed.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the gas inlet mode of the gas premixing sealing cover with bilateral gas inlet is bilateral gas inlet, so that the smoke overflow caused by overhigh local pressure is effectively avoided, the smoke absorbing capacity of the sintering table top is improved by adjusting the positions of the two circulating smoke inlet pipes, the circulating smoke outlet of the gas premixing sealing cover with bilateral gas inlet is provided with the gas distribution ring, and the full mixing of the gas and the circulating smoke is further realized by opposite impact diffusion, so that the CO is reduced on the premise of ensuring the quality of sintered mineral products2Discharging, and safely and efficiently realizing the high-proportion flue gas circulation of more than 30 percent.
Drawings
FIG. 1 is a schematic structural diagram of a double-sided intake gas premixing seal cover according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gas distribution ring according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a portion of a gas distribution ring according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a circulation system of flue gas of a sintering machine according to an embodiment of the present invention;
wherein, 1-sealing the cover body; 2-circulating flue gas inlet pipe; 3, a gas inlet pipe; 4-gas distribution ring; 5-branch pipe; 6-sintering the bed layer; 7-sintering machine bellows; 8-reducing and expanding the pipe section; 9-gas distribution ring gas inlet; 10-radial branch pipe of gas inlet pipe; 11-a perforated circular tube; 12-gas outlet holes; 13-strand sintering machine; 14-gas premixing sealing cover for double-side gas inlet; 15-circulating fan; 16-a dust removal device; 17-bellows switching valve; 18-an air bellow straight pipe section; 19-main flue; and 20-circulating the flue.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It should be understood by those skilled in the art that the present invention necessarily includes necessary piping, conventional valves and general pump equipment for achieving the complete process, but the above contents do not belong to the main inventive points of the present invention, and those skilled in the art can select the layout of the additional equipment based on the process flow and the equipment structure, and the present invention is not particularly limited to this.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides a double-sided intake gas premixing seal cover 14, as shown in fig. 1, the double-sided intake gas premixing seal cover 14 includes a seal cover body 1, and further, the seal cover body 1 is in a circular arch shape. The same cross-section department of 1 periphery of sealed cowling body inserts two circulation flue gas intake pipe 2 that the symmetry set up, stretches into gas intake pipe 3 in the sealed cowling body 1, is provided with branch pipe 5 and gas distribution ring 4 in the sealed cowling body 1 (as shown in figure 2 and figure 3), and gas intake pipe 3 is T shape with branch pipe 5 and distributes, and 4 symmetric connections in the branch pipe 5 both ends of gas distribution ring, and each gas distribution ring 4 corresponds a circulation flue gas intake pipe 2.
The pipeline section of circulation flue gas intake pipe 2 and 1 butt joint department of sealed cowling body is for subtracting expanding pipe section 8, subtracts expanding pipe section 8 diameter and increases gradually along the flue gas flow direction, specifically, subtracts expanding pipe section 8 and is 15 ~ 75 with the contained angle of horizontal plane. The gas inlet pipe 3 is vertical to the horizontal plane, the inlet end of the gas inlet pipe 3 is connected with a gas supply pipe, and furthermore, the joint of the gas inlet pipe 3 and the gas supply pipe is provided with a regulating valve.
The gas distribution ring 4 comprises at least one circle of circular perforated pipes 11, specifically, the circular perforated pipes 11 are distributed in a concentric circle mode, the number of the circular perforated pipes 11 is 1-8 circles, specially, the distance between the circular perforated pipes 11 is the same, the number of the perforated pipes 11 is the same, the surface of the gas distribution ring 4 and the included angle of the axis of the circulating flue gas inlet pipe 2 are 60-90 degrees, and the outlet end of the branch pipe 5 is connected with the center of the gas distribution ring 4.
In another embodiment, a circulation system of sintering machine flue gas comprises the double-side air inlet gas premixing seal cover 14, as shown in fig. 4, further comprises a sintering belt 13 and a circulation flue 20, the sintering belt 13 is arranged at the lower end of the seal cover body 1, the lower end of the sintering belt 13 is connected with at least ten sintering machine air boxes 7, the sintering machine air boxes 7 are connected with a main flue 19 and the circulation flue 20, and flue gas enters the circulation flue 20 through the sintering machine air boxes 7 to circulate, finally returns to the seal cover body 1 and is sprayed to the surface of the sintering belt 13.
The circulating system also comprises a dust removal device 16 and a circulating device, the main flue 19 is sequentially connected with the dust removal device 16 and the circulating device along the flow direction of flue gas, furthermore, the circulating device is a circulating fan 15, and a straight pipe section of the sintering machine air box 7 is provided with an air box switching valve 17.
The flue gas enters the circulating flue 20 through the air box 7 of the sintering machine for circulation, finally returns to the sealing cover body 1, and is sprayed to the surface of the strand sintering machine 13 for sintering, so that one circulation is completed.
Example 1
The present embodiment provides a double-side intake gas premixing sealing cover 14, and a double-side intake gas premixing sealing cover 14 according to an embodiment, wherein: the included angle between the reducing-expanding pipe section 8 and the horizontal plane is 15 degrees, the number of the circular pipes 11 with the holes is 1 circle, and the included angle between the surface of the gas distribution ring 4 and the axis of the circulating flue gas inlet pipe 2 is 60 degrees.
Based on another specific embodiment, the present embodiment provides an application method of a circulation system for flue gas of a sintering machine, wherein:
the flue gas in the sintering machine air box 7 is led out through an air box switching valve 17 on an air box straight pipe section 18, enters a circulating flue 20 and is extracted, the dust is removed through a dust removal device 16, the flue gas is sent to the surface of a material layer of the sintering machine through a circulating fan 15 to be subjected to circulating sintering, the flue gas is simultaneously fed from two sides of a gas premixing sealing cover 14 with double-side gas feeding, the gas inlet flow of each gas inlet pipe is reduced, the direct impact of a large amount of circulating flue gas on the material surface is reduced, the uniform distribution of a flow field in the sealing cover is realized through the opposite impact diffusion of two flue gases, the flue gas absorption capacity of the surface of the sintering material layer is improved, and the circulating efficiency of a circulating system of the sintering machine flue gas is 35%.
Example 2
The present embodiment provides a double-side intake gas premixing sealing cover 14, and a double-side intake gas premixing sealing cover 14 according to an embodiment, wherein: the included angle between the reducing-expanding pipe section 8 and the horizontal plane is 30 degrees, the number of the circular pipes 11 with the holes is 4 circles, and the included angle between the surface of the gas distribution ring 4 and the axis of the circulating flue gas inlet pipe 2 is 70 degrees.
Based on another specific embodiment, the present embodiment provides an application method of a circulation system for flue gas of a sintering machine, wherein:
the flue gas in the sintering machine air box 7 is led out through an air box switching valve 17 on an air box straight pipe section 18, enters a circulating flue 20 and is extracted, the dust is removed through a dust removal device 16, the flue gas is sent to the material bed surface of the sintering machine through a circulating fan 15 to be subjected to circulating sintering, the flue gas is simultaneously fed from two sides of a gas premixing sealing cover 14 with double-side gas feeding, the gas inlet flow of each gas inlet pipe is reduced, the direct impact of a large amount of circulating flue gas on the material bed is reduced, the uniform distribution of a flow field in the sealing cover is realized through the opposite impact diffusion of two flue gases, the flue gas absorption capacity of the surface of a sintering material bed is improved, and the circulating efficiency of a circulating system of the sintering machine flue gas is 45%.
Example 3
The present embodiment provides a double-side intake gas premixing sealing cover 14, and a double-side intake gas premixing sealing cover 14 according to an embodiment, wherein: the included angle between the reducing-expanding pipe section 8 and the horizontal plane is 75 degrees, the number of the circular pipes 11 with the holes is 8 circles, and the included angle between the surface of the gas distribution ring 4 and the axis of the circulating flue gas inlet pipe 2 is 90 degrees.
Based on another specific embodiment, the present embodiment provides an application method of a circulation system for flue gas of a sintering machine, wherein:
the flue gas in the sintering machine air box 7 is led out through an air box switching valve 17 on an air box straight pipe section 18, enters a circulating flue 20 and is extracted, the dust is removed through a dust removal device 16, the flue gas is sent to the surface of a material layer of the sintering machine through a circulating fan 15 to be subjected to circulating sintering, the flue gas is simultaneously fed from two sides of a gas premixing sealing cover 14 with double-side gas feeding, the gas inlet flow of each gas inlet pipe is reduced, the impact of a large amount of circulating flue gas on the material surface directly is reduced, the uniform distribution of a flow field in the sealing cover is realized through the opposite impact diffusion of two flue gases, the flue gas absorption capacity of the surface of the sintering material layer is improved, and the circulating efficiency of a circulating system of the sintering machine flue gas is 40%.
According to the invention, through the two circulating flue gas inlet pipes 2, air is simultaneously fed from two sides of the double-side gas inlet premixing sealing cover 14, so that the air inlet flow of each inlet pipe is reduced, the direct impact of a large amount of circulating flue gas on the charge level is reduced, the uniform distribution of the flow field in the sealing cover is realized through the opposite impact diffusion of two strands of flue gas, and the flue gas absorption capacity of the surface of the sintered charge level is improved, so that the high-proportion flue gas circulation of more than 30% can be safely and efficiently realized on the premise of ensuring the quality of sintered minerals. On the other hand, by arranging the gas distribution ring 4 in the gas premixing sealing cover 14 with double-side gas inlet, the combustible gas is mixed in the circulating flue gas by utilizing the kinetic energy of the circulating flue gas entering the gas premixing sealing cover 14 with double-side gas inlet and the premixing effect of opposite diffusion, and part of sintering solid fuel is replaced, because the gas is uniformly mixed and the air surplus coefficient required by homogeneous combustion is low, the oxygen demand for combustion of the sintering bed layer 6 is reduced, and the temperature of the sintering bed layer 6 can be ensured. When the hydrogen fuel and the biomass solid fuel are adopted, CO in the sintering process can be reduced2And (4) discharging.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The utility model provides a two sides gas premixed sealing cover that admits air, a serial communication port, two sides gas premixed sealing cover that admits air include the sealing cover body, the same cross-section department of sealing cover body periphery insert the circulation flue gas intake pipe that two symmetries set up, the sealing cover this internal gas intake pipe that stretches into, this internal branch pipe and the gas distribution ring of being provided with of sealing cover, gas intake pipe and branch pipe be T shape and distribute, gas distribution ring symmetric connection at the branch pipe both ends, each gas distribution ring corresponds a circulation flue gas intake pipe.
2. The double-sided air intake gas premix shroud as in claim 1, wherein said shroud body is dome-shaped.
3. The double-side air inlet gas premixing seal cover according to claim 1 or 2, characterized in that the circulating flue gas inlet pipe is butted with the seal cover body through a reducing-expanding pipe section;
preferably, the diameter of the reducing and expanding pipe section is gradually increased along the flow direction of the flue gas;
preferably, the included angle between the reducing and expanding pipe section and the horizontal plane is 15-75 degrees.
4. The double-sided air intake gas premixing seal cover according to any of claims 1 to 3, wherein the gas intake pipe is perpendicular to a horizontal plane;
preferably, the inlet end of the gas inlet pipe is connected with a gas supply pipe;
preferably, a regulating valve is arranged at the joint of the gas inlet pipe and the gas supply pipe.
5. The double-sided air intake gas premix shroud as in any of claims 1-4, wherein said gas distribution ring comprises at least one ring of perforated circular tubes;
preferably, the perforated circular pipes are distributed in concentric circles;
preferably, the number of the perforated circular pipes is 1-8 circles;
preferably, the distance between the circular pipes with the holes is the same;
preferably, the number of openings of each of the perforated circular tubes is the same.
6. The double-side air inlet gas premixing sealing cover according to any one of claims 1 to 5, characterized in that the included angle between the surface of the gas distribution ring and the axis of the circulating flue gas inlet pipe is 60-90 °;
preferably, the outlet end of the branch pipe is connected with the center of the gas distribution ring.
7. A circulation system of sintering machine flue gas is characterized by comprising the double-side air inlet gas premixing sealing cover according to any one of claims 1-6, and further comprising a strand sintering machine and a circulation flue, wherein the strand sintering machine is arranged at the lower end of the sealing cover body, the lower end of the strand sintering machine is connected with at least ten sintering machine air boxes, the sintering machine air boxes are connected with a main flue and the circulation flue, and the flue gas enters the circulation flue through the sintering machine air boxes to circulate, finally returns to the sealing cover body and is sprayed to the surface of the strand sintering machine.
8. The circulation system of claim 7, further comprising a dust removal device and a circulation device;
preferably, the main flue is sequentially connected with a dust removal device and a circulating device along the flow direction of flue gas;
preferably, the circulating device is a circulating fan.
9. The circulation system according to claim 7, wherein the straight tube section of the sintering machine windbox is provided with a windbox switching valve.
10. The circulation system of claim 7, wherein flue gas enters the circulation flue through the sintering machine windbox to circulate, finally returns to the seal cover body, and is sprayed to the surface of the strand sintering machine to sinter, thereby completing one circulation.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661065.0A CN113218196B (en) | 2021-06-15 | 2021-06-15 | Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine |
| JP2023553676A JP2024509205A (en) | 2021-06-15 | 2022-04-19 | Fuel gas premixing sealed hood with intake on both sides and sintering machine exhaust gas circulation system |
| PCT/CN2022/087686 WO2022262406A1 (en) | 2021-06-15 | 2022-04-19 | Gas premixing sealing cover capable of double-side intake and circulating system for flue gas of sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661065.0A CN113218196B (en) | 2021-06-15 | 2021-06-15 | Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine |
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| Publication Number | Publication Date |
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| CN113218196A true CN113218196A (en) | 2021-08-06 |
| CN113218196B CN113218196B (en) | 2022-02-22 |
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| CN202110661065.0A Active CN113218196B (en) | 2021-06-15 | 2021-06-15 | Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine |
Country Status (3)
| Country | Link |
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| JP (1) | JP2024509205A (en) |
| CN (1) | CN113218196B (en) |
| WO (1) | WO2022262406A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819763A (en) * | 2021-11-02 | 2021-12-21 | 中国科学院过程工程研究所 | Trolley sealing device for flue gas circulation system of sintering machine |
| WO2022262406A1 (en) * | 2021-06-15 | 2022-12-22 | 中国科学院过程工程研究所 | Gas premixing sealing cover capable of double-side intake and circulating system for flue gas of sintering machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121792A (en) * | 2010-12-20 | 2011-07-13 | 昆明理工大学 | New device for recycling tail flue gas of mobile sintering machine and reducing emission of sulfur dioxide |
| CN202648404U (en) * | 2012-04-27 | 2013-01-02 | 宝山钢铁股份有限公司 | Sealing device for circulating sintering flue gas |
| CN105066700A (en) * | 2015-08-10 | 2015-11-18 | 中国科学院过程工程研究所 | Sealed hot blast cover device |
| US20170108275A1 (en) * | 2015-03-27 | 2017-04-20 | Insttute Of Process Engineering, Chinese Academy Of Sciences | Process and system for waste heat grading cyclic utilization and pollutant emission reduction of sintering flue gas |
| CN106679438A (en) * | 2017-01-13 | 2017-05-17 | 成都易态科技有限公司 | Lime kiln high-temperature waste gas recycling system |
| CN110030840A (en) * | 2019-04-17 | 2019-07-19 | 中国科学院过程工程研究所 | A kind of smoke impervious cover and the sintering device flue gas circulatory system |
| CN110514011A (en) * | 2019-09-25 | 2019-11-29 | 北京中航泰达环保科技股份有限公司 | A kind of smoke impervious cover and the sintering flue gas circulatory system and control method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589128B (en) * | 2012-02-07 | 2017-07-28 | 海尔集团公司 | Double air inlet heat-exchange device for condensation type gas water heater |
| CN202521864U (en) * | 2012-02-07 | 2012-11-07 | 重庆海尔热水器有限公司 | Dual-air-inlet heat exchange device of condensing gas water heater |
| CN207298934U (en) * | 2017-07-29 | 2018-05-01 | 上海钜荷热力技术有限公司 | Circulation all-premixing burner in a kind of flue gas |
| CN207452207U (en) * | 2017-08-31 | 2018-06-05 | 中冶华天工程技术有限公司 | A kind of separate system for being sintered flue gas recirculation circuit |
| CN207456202U (en) * | 2017-11-27 | 2018-06-05 | 中冶北方（大连）工程技术有限公司 | Sintering circular-cooler waste heat recovery pipeline is simply from dust-extraction unit |
| CN113218196B (en) * | 2021-06-15 | 2022-02-22 | 中国科学院过程工程研究所 | Gas premixed sealing cover with double-side air inlet and circulation system for flue gas of sintering machine |
| CN113819763B (en) * | 2021-11-02 | 2022-05-17 | 中国科学院过程工程研究所 | Trolley sealing device for flue gas circulation system of sintering machine |
-
2021
- 2021-06-15 CN CN202110661065.0A patent/CN113218196B/en active Active
-
2022
- 2022-04-19 JP JP2023553676A patent/JP2024509205A/en active Pending
- 2022-04-19 WO PCT/CN2022/087686 patent/WO2022262406A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121792A (en) * | 2010-12-20 | 2011-07-13 | 昆明理工大学 | New device for recycling tail flue gas of mobile sintering machine and reducing emission of sulfur dioxide |
| CN202648404U (en) * | 2012-04-27 | 2013-01-02 | 宝山钢铁股份有限公司 | Sealing device for circulating sintering flue gas |
| US20170108275A1 (en) * | 2015-03-27 | 2017-04-20 | Insttute Of Process Engineering, Chinese Academy Of Sciences | Process and system for waste heat grading cyclic utilization and pollutant emission reduction of sintering flue gas |
| CN105066700A (en) * | 2015-08-10 | 2015-11-18 | 中国科学院过程工程研究所 | Sealed hot blast cover device |
| CN106679438A (en) * | 2017-01-13 | 2017-05-17 | 成都易态科技有限公司 | Lime kiln high-temperature waste gas recycling system |
| CN110030840A (en) * | 2019-04-17 | 2019-07-19 | 中国科学院过程工程研究所 | A kind of smoke impervious cover and the sintering device flue gas circulatory system |
| CN110514011A (en) * | 2019-09-25 | 2019-11-29 | 北京中航泰达环保科技股份有限公司 | A kind of smoke impervious cover and the sintering flue gas circulatory system and control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262406A1 (en) * | 2021-06-15 | 2022-12-22 | 中国科学院过程工程研究所 | Gas premixing sealing cover capable of double-side intake and circulating system for flue gas of sintering machine |
| CN113819763A (en) * | 2021-11-02 | 2021-12-21 | 中国科学院过程工程研究所 | Trolley sealing device for flue gas circulation system of sintering machine |
| US11780004B2 (en) | 2021-11-02 | 2023-10-10 | Institue of Process Engineering, Chinese Academy of Sciences | Trolley sealing device for flue gas circulation system of sintering machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024509205A (en) | 2024-02-29 |
| WO2022262406A1 (en) | 2022-12-22 |
| CN113218196B (en) | 2022-02-22 |
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