CN211695930U - Flue gas circulation emission reduction system of sintering machine - Google Patents

Flue gas circulation emission reduction system of sintering machine Download PDF

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Publication number
CN211695930U
CN211695930U CN202020374753.XU CN202020374753U CN211695930U CN 211695930 U CN211695930 U CN 211695930U CN 202020374753 U CN202020374753 U CN 202020374753U CN 211695930 U CN211695930 U CN 211695930U
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flue
circulation
sintering
gas
sintering machine
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尹超
董军
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Xinxing Ductile Iron Pipes Co Ltd
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Xinxing Ductile Iron Pipes Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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Abstract

The utility model discloses a sintering machine flue gas circulation emission reduction system belongs to ferrous metallurgy technical field, including the sintering flue, aircraft nose electrostatic precipitator, main fan room and main air exhauster, sintering flue air inlet intercommunication sintering machine bellows, the air inlet of aircraft nose electrostatic precipitator is connected to sintering flue gas outlet, the air inlet of first flue is connected to aircraft nose electrostatic precipitator's gas outlet, the air inlet in main fan room is connected to the gas outlet of first flue, the chimney is connected to the gas outlet of second flue, the air inlet of circulation flue is connected to the second flue inlet end of connecting main air exhauster room upper end, the end of giving vent to anger of circulation flue is connected with a plurality of circulation branch pipes, the circulation petticoat pipe is connected to the gas outlet of circulation branch pipe. The utility model discloses carry out recovery processing with the part flue gas that produces in the sintering machine to the sintering machine of reemission, as sintering gas cyclic utilization, can adjust the circulation volume of flue gas simultaneously, realize the high-efficient utilization of flue gas waste heat, reduce the sintering process energy consumption.

Description

Flue gas circulation emission reduction system of sintering machine
Technical Field
The utility model relates to a sintering machine flue gas circulation reduces discharging system belongs to ferrous metallurgy technical field.
Background
In steel and iron works, sintering is a processing method for providing 'concentrate' for blast furnace smelting, which is to mix prepared raw materials such as concentrate, mineral powder, fuel, flux, return ores and iron-containing production waste materials according to a certain proportion, mix and granulate to obtain a sintering material meeting the requirements, ignite the sintering material, generate high temperature by means of carbon combustion and iron mineral oxidation, soften and melt part of components in the sintering material, generate a certain amount of liquid phase through chemical reaction, and bond the liquid phase into blocks when cooling to obtain the finished sintering ore.
The sintering process can generate a large amount of NO due to the physical and chemical reaction of the sintering materialXCompound, S02Dust, C0 and a small amount of dioxin pollute the flue gas, and in the traditional sintering process, the flue gas is directly discharged into the air. With the increasing national standards for the emission of pollutants in the steel industry, and the improvement of the process and the innovation of the technology, the wet desulphurization equipment and the dust removal equipment for treating the flue gas are widely applied.
The flue gas that present sintering machine produced mainly inhales the chimney department through the sintering machine system of two main air blowers, remove dust to the flue gas at the in-process of extraction, reduce the dust through dust collecting equipment in the flue gas extraction process, the sintering system of two main air blowers mainly includes sintering flue, aircraft nose dust remover, main air blower etc. the flue gas that the sintering machine produced gets into aircraft nose dust remover through two sintering flues that sintering machine bellows intercommunication symmetry set up, later take out the chimney department through main air blower, then through wet-type sweetener removal sintering machine exhaust S02. However, the existing treatment method is that on one hand, the main pollutant NO generated in the sintering processXOn the other hand, the flue gas temperature at the chimney reaches 150 ℃, certain energy loss is caused by direct treatment and emission, meanwhile, the flue gas pumped out by the double main exhaust fans is directly pumped to the chimney for desulfurization treatment, and the emission amount of the flue gas mostly exceeds the load of desulfurization equipment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a sintering machine flue gas circulation emission reduction system, carries out recovery processing with the part flue gas that produces in the sintering machine to the sintering machine of reeving, as sintering gas cyclic utilization, can adjust the circulation volume of flue gas simultaneously, realize the high-efficient utilization of flue gas waste heat, reduce sintering process energy consumption.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a flue gas circulation emission reduction system of a sintering machine comprises a sintering flue, a machine head electric precipitator, a main exhaust fan room and a main exhaust fan, wherein an air inlet of the sintering flue is communicated with an air box of the sintering machine, an air outlet of the sintering flue is connected with an air inlet of the machine head electric precipitator, an air outlet of the machine head electric precipitator is connected with an air inlet of a first flue, an air outlet of the first flue is connected with an air inlet of the main exhaust fan room, an air inlet of a second flue is connected with an air outlet of the main exhaust fan room through the main exhaust fan, an air outlet of the second flue is connected with a chimney, the sintering flue, the machine head electric precipitator, the first flue, the main exhaust fan and the second flue are symmetrically arranged, an air inlet end of the second flue connected with the upper end of the main exhaust fan room is connected with an air inlet of the circulation flue, and a second electric regulating valve is arranged at the air inlet end of the circulating flue, and a first electric regulating valve is arranged at the air inlet end of the second flue connected with the circulating flue.
The utility model discloses technical scheme's further improvement lies in: the two sides of the circulating smoke hood are connected with an air box of the sintering machine through a gas collecting pipe, and a pneumatic valve is arranged on the gas collecting pipe.
The utility model discloses technical scheme's further improvement lies in: the circulating smoke hood is provided with an oxygen supplementing opening.
The utility model discloses technical scheme's further improvement lies in: the circulating smoke hood is provided with a plurality of pipeline supports, and the pipeline supports are provided with movable pipe brackets for fixing the circulating branch pipes.
Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:
the utility model discloses a sintering machine flue gas circulation emission reduction system carries out recovery processing with the part flue gas that produces in the sintering machine to the sintering machine of reeving, as sintering gas cyclic utilization, can adjust the circulation volume of flue gas simultaneously, realize the high-efficient utilization of flue gas waste heat, reduce the sintering process energy consumption.
Through setting up first electrical control valve, second electrical control valve and circulation flue, can change the flue gas volume that gets into the chimney with the second flue of main air exhauster room upper end connection, make partial flue gas get into the circulation flue from the second flue of being connected with main air exhauster room upper end, the flue gas that gets into the circulation flue gets into the circulation petticoat pipe from a plurality of circulation branch pipes of being connected with the circulation flue end of giving vent to anger, spout again in the sintering machine and provide partial heat for the physicochemical reaction of sintering material after coming out from the circulation petticoat pipe, NO simultaneously in the flue gasXCO and other gases can react with fuel for the second time, the content of the CO and other gases is reduced through the circulation of the flue gas, the high-efficiency utilization of the waste heat of the flue gas is realized, and the energy consumption in the sintering process is reduced; the first electric regulating valve regulates the smoke quantity entering the chimney from the second flue connected with the upper end of the main exhaust fan room, and the second electric regulating valve regulates the smoke quantity entering the circulating flue from the second flue, namely the first electric regulating valve and the second electric regulating valve act together to regulate the circulating quantity of smoke.
When positive pressure appears in the circulating smoke hood, the pneumatic valve can be automatically opened, smoke enters the interior of the air box of the sintering machine again through the gas collecting pipes on two sides of the circulating smoke hood, and the smoke can be effectively controlled to overflow.
The oxygen supplementing port is arranged, so that the oxygen content of the circulating flue gas meets the process requirements, and the problem that the sintering effect is poor and the product quality is influenced due to low oxygen content after the flue gas is circulated is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the device comprises a main exhaust fan 1, a first electric regulating valve 2, a second electric regulating valve 3, a machine head electric dust remover 4, a circulating flue 5, a circulating branch pipe 6, a circulating flue 7, a circulating flue cover 8, an oxygen supplementing port 9, a sintering flue 10, a pneumatic valve 11, a main exhaust fan room 12, a chimney 13, a first flue 14 and a second flue.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
as shown in figure 1, the flue gas circulation emission reduction system for the sintering machine comprises a sintering flue 9, an electric dust remover head 4, a main suction fan room 11 and a main exhaust fan 1, wherein an air inlet of the sintering flue 9 is communicated with an air box of the sintering machine, an air outlet of the sintering flue 9 is connected with an air inlet of the electric dust remover head 4, an air outlet of the electric dust remover head 4 is connected with an air inlet of a first flue 13, an air outlet of the first flue 13 is connected with an air inlet of the main exhaust fan room 11, an air inlet of a second flue 14 is connected with an air outlet of the main exhaust fan room 11 through the main exhaust fan 1, an air outlet of the second flue 14 is connected with a chimney 12, the sintering flue 9, the electric dust remover head 4, the first flue 13, the main exhaust fan 1 and the second flue 14 are symmetrically arranged, an air inlet end of the second flue 14 connected with the upper end of the main, the gas outlet of the circulating branch pipe 6 is connected with a circulating smoke hood 7, the lower end of the circulating smoke hood 7 is provided with a gas collecting hood, the gas inlet end of the circulating flue 5 is provided with a second electric regulating valve 3, and the gas inlet end of a second flue 14 connected with the circulating flue 5 is provided with a first electric regulating valve 2.
The two sides of the circulating smoke hood 7 are connected with the sintering machine air box through the gas collecting pipes, the gas collecting pipes are provided with pneumatic valves 10, smoke is generally pumped away through the sintering flue 9, negative pressure is formed in the circulating smoke hood 7, when positive pressure occurs in the circulating smoke hood 7, the pneumatic valves 10 are automatically opened, the smoke enters the sintering machine air box again through the gas collecting pipes on the two sides of the circulating smoke hood 7, and the smoke can be effectively controlled to overflow; the circulating smoke hood 7 is provided with an oxygen supplementing port 8, and the oxygen supplementing port 8 is arranged to ensure that the oxygen content of the circulating smoke meets the process requirement, so that the problem that the sintering effect is poor and the product quality is influenced due to low oxygen content after the smoke is circulated is avoided; and be equipped with a plurality of pipeline brackets on the circulation petticoat pipe 7, be equipped with movable conduit saddle on the pipeline bracket and be used for fixed circulation branch pipe 6, can make circulation branch pipe 6 more durable with being connected of circulation petticoat pipe 7.
The utility model relates to a sintering machine flue gas circulation emission reduction system when using, the flue gas that produces from the sintering machine comes out the back from the sintering machine bellows, gets into aircraft nose electrostatic precipitator 4 through sintering flue 9 and removes dust, then gets into main suction fan room 11 by first flue 13, takes out the back by main air exhauster 1 of being connected with main air exhauster room 11 and gets into the chimney through second flue 14, through adjusting the second air exhausterAn electric control valve 2 and a second electric control valve 3 change the smoke volume of a second flue 14 connected with the upper end of a main exhaust fan room 11 and entering a chimney 12, so that part of the smoke enters a circulating flue 5 from the second flue 14 connected with the upper end of the main exhaust fan room 11, the smoke entering the circulating flue 5 enters a circulating smoke hood 7 from a plurality of circulating branch pipes 6 connected with the air outlet end of the circulating flue 5, the smoke is sprayed into a sintering machine again after coming out of the circulating smoke hood 7 to provide part of heat for the physical and chemical reactions of sintering materials, and meanwhile, NO in the smokeXAnd gases such as CO can react with fuel for the second time, the content of the gases is reduced through the circulation of the flue gas, the high-efficiency utilization of the waste heat of the flue gas is realized, and the energy consumption in the sintering process is reduced.
The utility model discloses a sintering machine flue gas circulation emission reduction system carries out recovery processing with the part flue gas that produces in the sintering machine to the sintering machine of reeving, as sintering gas cyclic utilization, can adjust the circulation volume of flue gas simultaneously, realize the high-efficient utilization of flue gas waste heat, reduce the sintering process energy consumption.

Claims (4)

1. The utility model provides a flue gas circulation emission reduction system of sintering machine, including sintering flue (9), aircraft nose electrostatic precipitator (4), main suction fan room (11) and main air exhauster (1), sintering flue (9) air inlet intercommunication sintering machine bellows, the air inlet of aircraft nose electrostatic precipitator (4) is connected to sintering flue (9) gas outlet, the air inlet of first flue (13) is connected to the gas outlet of aircraft nose electrostatic precipitator (4), the air inlet of main suction fan room (11) is connected to the gas outlet of first flue (13), the gas outlet of main suction fan room (11) is connected through main air exhauster (1) to the gas inlet of second flue (14), chimney (12) is connected to the gas outlet of second flue (14), sintering flue (9), aircraft nose electrostatic precipitator (4), first flue (13), main air exhauster (1) and second flue (14) are two of symmetry setting, its characterized in that: connect second flue (14) inlet end of main fan room (11) upper end and connect the air inlet of circulation flue (5), the end of giving vent to anger of circulation flue (5) is connected with a plurality of circulation branch pipes (6), circulation petticoat pipe (7) are connected to the gas outlet of circulation branch pipe (6), the lower extreme of circulation petticoat pipe (7) is equipped with the gas collecting channel, the inlet end of circulation flue (5) is equipped with second electrical control valve (3), second flue (14) inlet end that is connected with circulation flue (5) is equipped with first electrical control valve (2).
2. The flue gas circulation emission reduction system for the sintering machine according to claim 1, characterized in that: two sides of the circulating smoke hood (7) are connected with an air box of the sintering machine through a gas collecting pipe, and a pneumatic valve (10) is arranged on the gas collecting pipe.
3. The flue gas circulation emission reduction system for the sintering machine according to claim 1, characterized in that: an oxygen supplementing opening (8) is arranged on the circulating smoke hood (7).
4. The flue gas circulation emission reduction system for the sintering machine according to claim 1, characterized in that: a plurality of pipeline supports are arranged on the circulating smoke hood (7), and movable pipe brackets are arranged on the pipeline supports and used for fixing the circulating branch pipes (6).
CN202020374753.XU 2020-03-23 2020-03-23 Flue gas circulation emission reduction system of sintering machine Active CN211695930U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020374753.XU CN211695930U (en) 2020-03-23 2020-03-23 Flue gas circulation emission reduction system of sintering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020374753.XU CN211695930U (en) 2020-03-23 2020-03-23 Flue gas circulation emission reduction system of sintering machine

Publications (1)

Publication Number Publication Date
CN211695930U true CN211695930U (en) 2020-10-16

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CN202020374753.XU Active CN211695930U (en) 2020-03-23 2020-03-23 Flue gas circulation emission reduction system of sintering machine

Country Status (1)

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CN (1) CN211695930U (en)

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