CN202912990U - Hot blast stove system - Google Patents

Hot blast stove system Download PDF

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Publication number
CN202912990U
CN202912990U CN2012205585605U CN201220558560U CN202912990U CN 202912990 U CN202912990 U CN 202912990U CN 2012205585605 U CN2012205585605 U CN 2012205585605U CN 201220558560 U CN201220558560 U CN 201220558560U CN 202912990 U CN202912990 U CN 202912990U
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CN
China
Prior art keywords
gas
hot
blast
outlet
air
Prior art date
Application number
CN2012205585605U
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Chinese (zh)
Inventor
刘世聚
刘�东
崔方辉
范剑超
Original Assignee
河南省豫兴热风炉工程技术有限公司
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Priority to CN2012205585605U priority Critical patent/CN202912990U/en
Application granted granted Critical
Publication of CN202912990U publication Critical patent/CN202912990U/en

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    • Y02W30/54

Abstract

The utility model relates to a hot blast stove system. A high-temperature combustion air outlet with a high-temperature combustion air valve is arranged at the upper part of a hot blast stove, and is communicated with a high-temperature combustion air pipeline; the high-temperature combustion air pipeline is communicated with a cold air mixing wind box; the bottom of the cold air mixing wind box is communicated with a blower; and the top of the blower is communicated with the combustion air pipeline. During waste gas recovery under a coal gas preheated condition, the high air temperature of 1200 to 1400 DEG C or even higher hot-blast temperature of the hot blast stove can be realized only through blast furnace gas and with no other auxiliary measures. The hot blast stove system is simple in structure and simple and convenient to operate, not only effectively improves the working efficiency and increases the heat energy utilization ratio, but also greatly saves resources, improves resource utilization ratio and reduces environmental pollution. 30 to 35 kg of coke can be saved for each ton of iron, and the yield is increased by 2.5 percent.

Description

A kind of hot blast stove system
Technical field
The utility model relates to field of metallurgy, is specifically related to a kind of hotblast stove, particularly a kind of hot blast stove system.
Background technology
Hotblast stove is the important utility appliance of blast furnace ironmaking engineering, is a kind of thermal apparatus of cycling service of intermittent-heating, improves wind-warm syndrome and moves for blast furnace safety, and energy efficient reduces production costs, and it is significant to reduce noxious gas emission.At present, the method that improves the hot air furnace hot air temperature mainly contains single preheating, the two preheating of taking stack gases to implement, combustion gas furnace air heating, preheating oven preheating and oxygen enrichment, add coal gas of converter, add coke-oven gas, the householder method such as self-preheating.But above-mentioned method all has increases certain gas quantity, increase intrinsic mechanical means, increase the factor that floor space etc. increases cost, although can realize high wind-warm syndrome, but construction cost is high, but there are many improvements, if reasonable utilization that can not be correct, or even the technology that loses more than gain.
Therefore, provide a kind of simple in structure, easy to operate, high efficiency, heat utilization rate is high, thermal losses is little, energy-conserving and environment-protective, fuel saving, save investment, reduce spent air temperture and quantity discharged, reduced the hot blast stove system of environmental pollution and utilized this system to improve the method for hot blast temperature, have wide market outlook.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of simple in structure, easy to operate, high efficiency, heat utilization rate is high, thermal losses is little, energy-conserving and environment-protective, fuel saving, saving investment, reduce spent air temperture and quantity discharged, reduced the hot blast stove system of environmental pollution and utilize the method for this system's raising hot blast temperature.
The technical solution of the utility model is like this: a kind of hot blast stove system, comprise at least two hotblast stoves parallel with one another, be arranged on the gas preheater of hotblast stove outside, the chimney that is connected with gas preheater, the preheating gas pipeline, be arranged on the inner gas entry with gas valve that is connected with the preheating gas pipeline of hotblast stove, be arranged on the hot-blast outlet of gas entry top, the hot blast manifold with the hot-blast outlet valve that is connected with hot-blast outlet, the hot blast main pipe road that is connected with hot blast manifold, the blast furnace that is connected with the hot blast main pipe road, the blast furnace gas pipeline that is connected with blast furnace and gas preheater, be arranged on the cold air inlet with the cold wind valve of hotblast stove bottom, the cold air duct that is connected with cold air inlet, the cold wind blower fan that is connected with cold air duct, be arranged on the exhanst gas outlet with exhaust valve of cold air inlet both sides, the flue that is connected with exhanst gas outlet and gas preheater, be arranged on the fan of the outer middle side part of gas preheater, the combustion air pipeline that is connected with fan, the gas inlet with the combustion air valve that is connected with the combustion air pipeline, described hotblast stove top is provided with the high temperature combustion supporting air outlet with the high temperature combustion supporting air valve, the high temperature combustion supporting air outlet is connected with the high temperature combustion supporting air pipeline, the high temperature combustion supporting air pipeline is connected with cold wind wind mixed chamber, the bottom of cold wind wind mixed chamber is connected with fan, and the top of fan is connected with the combustion air pipeline.
Described high temperature combustion supporting air outlet is arranged on the level of hot-blast outlet or the hotblast stove inside of top, also can be arranged on the hot blast manifold or hot blast main pipe road of hot-blast outlet top.
The utlity model has following positively effect: at first, the utility model not only relies on stack gases that coal gas is carried out preheating, and further improved the heat utilization rate of system, the utility model the level attitude of hot-blast outlet or above hotblast stove inside the outlet of one high temperature combustion supporting air is set, hot blast is extracted a part from this position, mix with cold wind in cold wind wind mixed chamber, form the combustion-supporting hot blast of 200 to 1300 celsius temperatures that hotblast stove needs, the high temperature combustion air that has like this high temperature to form through cold wind, deliver to an other combustion-supporting use of hotblast stove, coal gas mixed firing after high temperature combustion supporting air and the preheating, one group in hotblast stove is at least two, adopt successively circulating-heating burning air-supply of aforesaid way, under waste gas reclaims the gas preheating condition, just can only rely on blast furnace gas and not take other any assist measures can realize 1200 to 1400 degrees centigrade high wind-warm syndrome, even higher hot air furnace hot air temperature; The utility model device structure is simple, working method is simple and convenient, not only effectively raise working efficiency, the utilization ratio of the heat energy that has increased, and greatly saved resource, improved the utilization ratio of resource, and reduced the pollution to environment, after the use, iron per ton can be saved coke 30 to 35kg, increases output 2.5%.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of hot blast stove system, comprise at least two hotblast stoves parallel with one another 1, be arranged on the gas preheater 4 of hotblast stove 1 outside, the chimney 3 that is connected with gas preheater 4, preheating gas pipeline 12, be arranged on the hotblast stove 1 inner gas entry 16 with gas valve 27 that is connected with preheating gas pipeline 12, be arranged on the hot-blast outlet 14 of gas entry 16 tops, the hot blast manifold 20 with hot-blast outlet valve 22 that is connected with hot-blast outlet 14, the hot blast main pipe road 2 that is connected with hot blast manifold 20, the blast furnace 13 that is connected with hot blast main pipe road 2, the blast furnace gas pipeline 7 that is connected with blast furnace 13 and gas preheater 4, be arranged on the cold air inlet 18 with cold wind valve 24 of hotblast stove 1 bottom, the cold air duct 9 that is connected with cold air inlet 18, the cold wind blower fan 5 that is connected with cold air duct 9, be arranged on the exhanst gas outlet 17 with exhaust valve 21 of cold air inlet 18 both sides, the flue 10 that is connected with exhanst gas outlet 17 and gas preheater 4, be arranged on the fan 25 of gas preheater 4 outer middle side parts, the combustion air pipeline 8 that is connected with fan 25, the gas inlet 19 with combustion air valve 26 that is connected with combustion air pipeline 8, described hotblast stove 1 top is provided with the high temperature combustion supporting air outlet 15 with high temperature combustion supporting air valve 23, high temperature combustion supporting air outlet 15 is connected with high temperature combustion supporting air pipeline 11, high temperature combustion supporting air pipeline 11 is connected with cold wind wind mixed chamber 6, the bottom of cold wind wind mixed chamber 6 is connected with fan 25, and the top of fan 25 is connected with combustion air pipeline 8.Described high temperature combustion supporting air outlet 15 is arranged on the level of hot-blast outlet 14 or hotblast stove 1 inside of top, also can be arranged on the hot blast manifold 20 or hot blast main pipe road 2 of hot-blast outlet 14 tops.
At least two hotblast stoves parallel with one another 1 are alternately finished accumulation of heat and are sent the hot blast operation, when first hotblast stove 1 beginning accumulation of heat operation, open the combustion air valve 26 of first hotblast stove 1, gas valve 27, exhaust valve 21, coal gas enters first hotblast stove 1 by preheating gas pipeline 12, outside air of while enters first hotblast stove 1 through combustion air pipeline 8 and begins to heat heat storage, waste gas enters flue 10 stepping of going forward side by side via exhanst gas outlet 17 and enters that gas preheater 4 is interior to come heating gas to finish the accumulation of heat operation, after first hotblast stove 1 is finished the accumulation of heat operation, close the gas valve 27 of first hotblast stove 1, exhaust valve 21, combustion air valve 26, open cold wind blower fan 5, hot-blast outlet valve 22, high temperature combustion supporting air valve 23, cold wind valve 24, begin to send the hot blast operation, part heat enters blast furnace 13 from hot-blast outlet 14 through hot blast main pipe road 2, another part heat enters high temperature combustion supporting air pipeline 11 through high temperature combustion supporting air outlet 15, be transported to the air that cold wind wind mixed chamber 6 interior heating chambers enter outward by high temperature combustion supporting air pipeline 11 again, outdoor cold air after the heating is with after the heat that high temperature combustion supporting air pipeline 11 transports mixes, obtain the high temperature combustion air, the high temperature combustion air is transported to second hotblast stove 1 by combustion air pipeline 8 and carries out the accumulation of heat operation of second hotblast stove 1, when second hotblast stove 1 carries out pre-hot work, first hotblast stove send the hot blast operation, recycles successively.The temperature of described high temperature combustion air is 200 to 1300 degrees centigrade.
The utility model includes at least two hotblast stoves parallel with one another 1, hot blast main pipe road 2 and hot-blast outlet 14, hot-blast outlet 14 places hotblast stove 1 top, hotblast stove is at least one group of 2 hotblast stove associated jobs, when first hotblast stove accumulation of heat finishes to be converted to air supply pattern, close gas valve 27, exhaust valve 21, combustion air valve 26, open cold wind blower fan 5, hot-blast outlet valve 22, high temperature combustion supporting air valve 23, cold wind valve 24, beginning is to blast furnace 13 air-supply work, simultaneously, second hotblast stove enters combustion heating accumulation of heat pattern, the hot-blast outlet valve 22 of second hotblast stove, high temperature combustion supporting air valve 23, cold wind valve 24 is closed, simultaneously, opening the exhaust valve 21 of second hotblast stove bottom discharges fume, open combustion air valve 26, gas valve 27 makes coal gas, air enters second hot-blast stove gas burner and carries out the mixed firing working order; When first hotblast stove air-supply, during second Combustion of Hot Air Furnace, blast furnace gas is from blast furnace 13, arrive gas preheater 4 via blast furnace gas pipeline 7, coal gas is carried out preheating, waste gas after the preheating enters chimney 3 and discharges, and the coal gas of high temperature after the preheating enters preheating gas pipeline 12, preheating gas burns by the burner that gas entry 16 enters second hotblast stove, high-temperature flue gas in the combustion processes by exhanst gas outlet 17 through flue 10 to gas preheater 4, blast furnace gas is carried out preheating, coal gas of high temperature after the preheating uses via gas preheating pipeline 12 to 16 to second hotblast stoves of gas entry, a small amount of waste gas that gas preheater 4 forms is by chimney 3 dischargings, be provided with high temperature combustion supporting air outlet 15 with hot-blast outlet 14 adjacent regions, when first is blown to blast furnace 13, open high-temperature hot-air outlet 15, the high-temperature hot-air that high temperature combustion supporting air outlet 15 is discharged is delivered to the air that cold wind wind mixed chamber 6 interior heating chambers enter via high temperature combustion supporting air pipeline 11 outward with high-temperature hot-air, outdoor cold air after the heating is with after the heat that high temperature combustion supporting air pipeline 11 transports mixes, obtain the high temperature combustion air, the temperature of high temperature combustion air is 200 to 1300 degrees centigrade, delivers to second hotblast stove by fan 25 and uses.Under waste gas reclaims the gas preheating condition, just can only rely on blast furnace gas and not take other any assist measures can realize 1200 to 1400 degrees centigrade high wind-warm syndrome, even higher hot air furnace hot air temperature; The utility model device structure is simple, working method is simple and convenient, not only effectively raise working efficiency, the utilization ratio of the heat energy that has increased, and greatly saved resource, improved the utilization ratio of resource, and reduced the pollution to environment, after the use, iron per ton can be saved coke 30 to 35kg, increases output 2.5%.

Claims (2)

1. hot blast stove system, comprise at least two hotblast stoves parallel with one another (1), be arranged on the outside gas preheater (4) of hotblast stove (1), the chimney (3) that is connected with gas preheater (4), preheating gas pipeline (12), be arranged on the inner gas entry with gas valve (27) (16) that is connected with preheating gas pipeline (12) of hotblast stove (1), be arranged on the hot-blast outlet (14) of gas entry (16) top, the hot blast manifold with hot-blast outlet valve (22) (20) that is connected with hot-blast outlet (14), the hot blast main pipe road (2) that is connected with hot blast manifold (20), the blast furnace (13) that is connected with hot blast main pipe road (2), the blast furnace gas pipeline (7) that is connected with blast furnace (13) and gas preheater (4), be arranged on the cold air inlet with cold wind valve (24) (18) of hotblast stove (1) bottom, the cold air duct (9) that is connected with cold air inlet (18), the cold wind blower fan (5) that is connected with cold air duct (9), be arranged on the exhanst gas outlet with exhaust valve (21) (17) of cold air inlet (18) both sides, the flue (10) that is connected with exhanst gas outlet (17) and gas preheater (4), be arranged on the fan (25) of the outer middle side part of gas preheater (4), the combustion air pipeline (8) that is connected with fan (25), the gas inlet with combustion air valve (26) (19) that is connected with combustion air pipeline (8), it is characterized in that: described hotblast stove (1) top is provided with the high temperature combustion supporting air outlet (15) with high temperature combustion supporting air valve (23), high temperature combustion supporting air outlet (15) is connected with high temperature combustion supporting air pipeline (11), high temperature combustion supporting air pipeline (11) is connected with cold wind wind mixed chamber (6), the bottom of cold wind wind mixed chamber (6) is connected with fan (25), and the top of fan (25) is connected with combustion air pipeline (8).
2. hot blast stove system according to claim 1, it is characterized in that: described high temperature combustion supporting air outlet (15) is arranged on the level of hot-blast outlet (14) or hotblast stove (1) inside of top, also can be arranged on the hot blast manifold (20) or hot blast main pipe road (2) of hot-blast outlet (14) top.
CN2012205585605U 2012-10-29 2012-10-29 Hot blast stove system CN202912990U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012205585605U CN202912990U (en) 2012-10-29 2012-10-29 Hot blast stove system

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Application Number Priority Date Filing Date Title
CN2012205585605U CN202912990U (en) 2012-10-29 2012-10-29 Hot blast stove system

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CN202912990U true CN202912990U (en) 2013-05-01

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Application Number Title Priority Date Filing Date
CN2012205585605U CN202912990U (en) 2012-10-29 2012-10-29 Hot blast stove system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102888480A (en) * 2012-10-29 2013-01-23 河南省豫兴热风炉工程技术有限公司 Hot blast furnace system and method for improving hot air temperature by using same
CN104456574A (en) * 2013-09-17 2015-03-25 荒木国臣 Combustion apparatus
CN104456947A (en) * 2014-10-17 2015-03-25 北京航天益森风洞工程技术有限公司 Heat accumulating type pure air heating system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102888480A (en) * 2012-10-29 2013-01-23 河南省豫兴热风炉工程技术有限公司 Hot blast furnace system and method for improving hot air temperature by using same
CN104456574A (en) * 2013-09-17 2015-03-25 荒木国臣 Combustion apparatus
CN104456947A (en) * 2014-10-17 2015-03-25 北京航天益森风洞工程技术有限公司 Heat accumulating type pure air heating system
CN104456947B (en) * 2014-10-17 2018-02-13 北京航天益森风洞工程技术有限公司 Heat accumulating type pure air heating system

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