CN105318735B - A kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace - Google Patents

A kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace Download PDF

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CN105318735B
CN105318735B CN201510219469.9A CN201510219469A CN105318735B CN 105318735 B CN105318735 B CN 105318735B CN 201510219469 A CN201510219469 A CN 201510219469A CN 105318735 B CN105318735 B CN 105318735B
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blast furnace
water
sintering
lithium bromide
blast
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CN105318735A (en
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李正福
李宁燕
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李正福
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The present invention provides the device that a kind of utilization sintering low temperature waste heat cools down circulation water of blast furnace, including sintering region and blast furnace region, sinter region and include the sintering machine large flue for producing low-temperature flue gas, and central cooler 3,4 sections, also include two groups of flue gas type lithium bromide refrigerators, and shared circulating water device and header tank, blast furnace region needs the cooling wall of circulating water comprising two seat height stoves, furnace bottom, coiled pipe, air port hot-blast valve, tuyere small sleeve, the equipment and respective heat exchanger of cooling are needed, pipeline is connected, and is connected by water pump with header tank.The invention makes full use of the low temperature waste gas waste heat that sintering is discharged, and realizes that the cooling of blast-furnace equipment, good energy-conserving effect, and Operation and Maintenance are simple, is conducive to intensification of smelting process in BF, improves yield.

Description

A kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace
Technical field
Sintering low temperature waste heat cooling blast furnace circulation is utilized the present invention relates to low temperature exhaust heat recycling field, especially metallurgy industry The device of water.
Background technology
In steel manufacture process, sintering circuit energy consumption almost accounts for the 10% of whole enterprise energy consumption, is to be only second to ironmaking Second largest power consumption process.And the heat energy for having 50% or so in sintering circuit is sintered main smoking gas and central cooler waste gas is taken away, Wherein sintering machine main take out that flue gas residual heat accounts for sintering circuit energy consumption 13% one 23% or so, but for sintering machine large flue 100-150 DEG C of UTILIZATION OF VESIDUAL HEAT IN of low temperature is ignored by numerous enterprises always, and large flue waste heat thermal source is abundant, reclaims heat greatly, for It is energy-saving extremely notable.Under the premise of ensuring to have no adverse effects to sintering main process, if not recycling this part Waste gas residual heat, on the one hand wastes available energy, on the other hand because waste gas temperature DEG C is higher, reduces lower one of desulfurization process Operational effect, while causing wet desulphurization device to there is " gypsum rain " and " white cigarette hangover " phenomenon when putting into operation, is formed poor Visual effect, influence iron and steel enterprise image.
The temperature DEG C of existing sintering machine sintering ore removal reaches 700-800 DEG C in addition, and cold air passes through 1 section, 2 sections high temperature of central cooler Temperature DEG C is increased to 300-450 DEG C after sintering ore bed, in order to make full use of residual heat resources, most of at present using double discard heat boilers Technology, which reclaim, produces steam progress cogeneration, reaches energy-saving purpose.But for 3 sections, 4 sections of 100- of central cooler 200 DEG C of low temperature exhaust heat, generally using directly discharging, causes low temperature exhaust heat to waste.With the increasing of government's energy-saving and emission-reduction dynamics, Industrial energy saving is by the theme as future development, and for big power consumer iron and steel enterprise of today, low temperature heat must A great development period will be welcome.
With the development and the requirement of national industrial policies of cooling water technology, blast-furnace cooled water technology is directly cold by industry water But, gasification cooling, clean circulating water cooling, soft water and purified water joint cooling, to the cooling of independent closed loop sofe water and joint soft water Sealing and circulating water cooling system develops.Heat exchange cooling device is one of equipment the most key during blast-furnace cooled water is handled, soft water The stability of supply water temperature, the size of difference variation, will directly affect the stability and prolonging campaign of operation of blast furnace.It is domestic at present Heat transmission equipment mainly has pipe heat exchanger, aerial cooler, plate type heat exchanger, evaporative type cooler, closed cooling tower etc., tubular type Heat exchanger, aerial cooler, closed cooling tower etc., nearly all have that water loss is on the high side, investment, energy consumption and the fortune of whole system The characteristics of row expense can not all reach most economical.Even if using more evaporating air cooler at present, its cooling procedure will also disappear Consumption energy consumption, and water temperature can not be effectively ensured in four seasons Various Seasonal, and particularly summer cooling effect is more undesirable, it is necessary to mend A large amount of cooling waters are filled to ensure that blast furnace cools down circulating water temperature.And reasonable effective control of water temperature, it is not only advantageous to blast furnace reinforcing smelting Refining, and furnace processor can be improved.
The content of the invention
For the cooling scheme of the waste of existing sintering region low temperature exhaust heat and circulation water of blast furnace cooling, the present invention is provided The main purpose of technical scheme be:
The apparatus and method that a kind of utilization sintering low temperature waste heat cools down circulation water of blast furnace are provided.
To achieve these goals, present invention employs following technical scheme:
A kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace, wherein, including:
Sinter region and blast furnace region;
Described sintering region include central cooler 3,4 sections, sintering machine large flue, two-stage multi-pipe dust removing device, bag-type dust Device, switch valve, the first lithium bromide refrigerator, the second lithium bromide refrigerator, circulating water device;Central cooler 3,4 sections of connections are removed Dirt device, the outlet of dust arrester is connected by switching valve with the first lithium bromide refrigerator, the first lithium bromide refrigerator by pump, Valve is connected with header tank and circulating water device;Sintering machine large flue is connected with two-stage multi-pipe dust removing device, two-stage multi-tube dusting Device outlet is connected with bag-type dust collector, and bag-type dust collector is connected by the second switch valve and the second lithium bromide refrigerator Logical, the first switch valve is connected with blower fan, and the second lithium bromide refrigerator is connected by pump, valve and header tank and circulating water device It is logical;
Described blast furnace region, includes the cooling wall of No. 1 blast furnace, No. 2 blast furnaces, furnace bottom, coiled pipe, air port hot-blast valve, wind The small set of mouth, heat exchanger, pipeline;The cooling wall of No. 1 blast furnace, No. 2 blast furnaces, furnace bottom, coiled pipe, air port hot-blast valve, tuyere small sleeve lead to Cross water pump with respective heat exchanger to be connected, heat exchanger is connected by water pump with header tank.
The another side of the present invention also includes the second described lithium bromide refrigerator setup of entrances and exits valve, can automatically switch.
The another side of the present invention also includes first, second described lithium bromide refrigerator device common recycle water installations.
The another side of the present invention is also shared including the cold water that first, second described lithium bromide refrigerator device is produced to catchment Case.
The another side of the present invention also includes described header tank and connected by the heat-exchanger rig of respective water pump and No. 1, No. 2 blast furnace Connect.
The another side of the present invention also includes entering the first lithium bromide after described sintering circular-cooler 3,4 sections of waste heat flue gases collect Refrigeration machine, outlet outside chimney by arranging.
It should be noted that present invention sintering area equipment two-stage multi-pipe dust removing device, bag-type dust collector can be removed using electricity Dirt device.
It should be noted that the cooling of blast furnace area equipment of the present invention can be according to the requirement of different type of furnace technique, cooling Wall, furnace bottom, coiled pipe, air port hot-blast valve, tuyere small sleeve, heat exchanger, the mode that pipeline etc. carries out series, parallel is combined, And can be according to the requirement of pressure, on branch line increasing water pump improves pressure.
A kind of method that utilization sintering low temperature waste heat cools down circulation water of blast furnace, wherein, comprise the following steps:
Step 1:Sintering machine large flue waste gas and central cooler 3,4 sections of waste gas are provided,
Step 2:Enter respective lithium bromide refrigerator using waste gas residual heat and carry out making cold water,
Step 3:Two groups of lithium bromide refrigerators share header tank and circulating water device,
Step 4:Header tank cold water is connected with blast furnace heat exchanger, carries out hot and cold water exchange,
Step 5:Cold water after heat exchange cools down blast furnace cooling stave, furnace bottom, coiled pipe, air port hot-blast valve, air port by water pump The equipment such as small set,
Step 6:Water source after cooling device is exchanged heat into heat exchanger, is recycled.
By the implementation to technical solution of the present invention, following technique effect can be obtained:
1st, save;Using the low temperature exhaust heat waste gas of outer row, using lithium bromide steam refrigerating unit, not only can effectively it reduce The waste of waste gas residual heat resource, improves the cooling effect of blast furnace, and can also substantially reduce blast-furnace equipment cooling procedure electric energy Cost.
2nd, the cooling effect of blast-furnace equipment can be effectively improved, amount of makeup water is reduced;Particularly summer reduces a large amount of supplements Cooling water come ensure blast furnace cool down circulating water temperature.
3rd, refrigerating capacity adjustable range is wide;The step-less adjustment of refrigerating capacity, and thermal effect can be carried out during operation in load range Rate is almost unchanged.The cooling of blast furnace and equipment is obtained rationally effectively control, be not only advantageous to intensification of smelting process in BF, and can carry High yield.
4th, there is " gypsum rain " and " white cigarette hangover " phenomenon when reduction sintering wet desulphurization device puts into operation, change and regard at present Feel the effect of difference.
5th, whole system easy temperature control, operation is easy, and easy to maintenance, operating cost is relatively low, meets recycling economy, is metallurgical Enterprise realizes the developing direction of energy-saving and emission-reduction and environmental protection.
Brief description of the drawings
Fig. 1 cools down the structural representation of circulation water of blast furnace device for a kind of utilization sintering low temperature waste heat of the present invention.
Fig. 2 cools down the FB(flow block) of circulation water of blast furnace method for a kind of utilization sintering low temperature waste heat of the present invention.
Embodiment
Technical scheme is illustrated below by way of specific embodiment, with purpose of the present invention Lothrus apterus On the premise of, the technical characteristic in the embodiment and embodiment hereinafter mentioned can be mutually combined.
As shown in figure 1, being denoted as in figure:1- sintering machines, 2- sintering machine large flues, 3- two-stage multi-pipe dust removing devices, 4- Bag-type dust collector, 5- valves 1,6- blower fans, 7- desulfuring and denitrifying apparatus, 8- chimneys 1,9- central coolers, 10-1,2 sections of air blowers, 11-3,4 sections of air blowers, 12-1,2 sections of smoke exhaust barrels, 13- device for generating power by waste heat, 14-3,4 sections of smoke exhaust barrels, 15- dust arresters, 16- Chimney 2,17- water pumps 1,18- valves 4,19- the first lithium bromide coolers, 20- water pumps 2,21- header tanks, 22- cyclic water tanks, 23- water pumps 3,24- water pumps 4,25- valves 3,26- the second lithium bromide coolers, 27- valves 2,
301-1 blast furnace heat-exchanger rigs, 311-1 blast furnace water pumps, 321-1 Blast Furnace Bottoms, 331-1 Blast Furnace Bottom snakes Shape pipe, 341-1 blast-furnace tuyere hot-blast valves, 351-1 blast furnace tuyere small sleeves, 361-1 blast furnace cooling staves, 371-1 blast furnaces Deaerate expansion drum, 381- water pumps 5.
302-2 blast furnace heat-exchanger rigs, 312-2 blast furnace water pumps, 322-2 Blast Furnace Bottoms, 332-2 Blast Furnace Bottom snakes Shape pipe, 342-2 blast-furnace tuyere hot-blast valves, 352-2 blast furnace tuyere small sleeves, 362-2 blast furnace cooling staves, 372-2 blast furnaces Deaerate expansion drum, 382- water pumps 6.
The technical solution adopted in the present invention is:Using the 3 of central cooler, 4 sections of air blower is by 100-200 DEG C of sintering deposit Waste heat collected through smoke exhaust barrel, and after dust arrester dedusting, into the first lithium bromide refrigerating mechanism cold;Sintering machine is big The waste gas of 100-150 DEG C of flue is after two-stage multi-pipe dust removing device, bag-type dust collector dedusting, into the second lithium bromide refrigerator Refrigeration;First lithium bromide refrigerator device, the second lithium bromide refrigerator device share the cold water header tank produced and cooling water Circulating water device.
Header tank is connected by respective water pump with the heat-exchanger rig of No. 1, No. 2 blast furnace.No. 1, No. 2 blast furnace cooling systems are through water Pump, the cooling wall that the water source feeding blast furnace needs after having been exchanged heat in heat-exchanger rig are cooled down, furnace bottom, coiled pipe, air port hot-blast valve, Enter heat exchanger after tuyere small sleeve etc., the water source come out from cooling device, degassed expansion drum, carrying out circulation after heat exchange cooling makes With.
Embodiment of the present invention is related to the device that a kind of utilization sintering low temperature waste heat cools down circulation water of blast furnace, to make the present invention Purpose, technical scheme and advantage it is clearer, embodiment of the present invention is described further in detail below in conjunction with the accompanying drawings:
Fig. 1 is the schematic device of the present invention, and the device, which sinters region, mainly to be included, the 1 of central cooler 9,2 sections of air blower 10 300-400 DEG C of waste heat of sintering deposit is collected by smoke exhaust barrel 12 after generated electricity into device for generating power by waste heat 13;Ring is cold The 3 of machine 9,100-200 DEG C of waste heat of sintering deposit is collected and passes through dust arrester by 4 sections of air blower 11 through smoke exhaust barrel 14 After 15 dedustings, freeze into the first lithium bromide refrigerator 19, the flue gas after cooling is discharged into air through chimney 16;Sintering machine 1 it is big After 2100-150 DEG C of waste gas removing dust device (including two-stage multi-pipe dust removing device 3 and bag-type dust collector 4) dedusting of flue, pass through Switch valve 227 freezes into the second lithium bromide refrigerator 26, and the waste gas after cooling passes through main exhaust fan 6 and exhuast gas desulfurization denitration After device 7, air is discharged into through chimney 8.Valve 15 and valve 227 can be carried out between main pipeline and the second lithium bromide refrigerator 26 Switching.
First lithium bromide refrigerator device 19, the second lithium bromide refrigerator device 26 are produced using the heat energy of waste gas for medium Cold water, cold water, which enters, shares header tank 21, between water pump 117, valve 418 and water pump 424, valve 325 are set;Two lithium bromides The recirculated water of refrigeration unit 19,26 enters common recycle water installations 22 through respective water pump 20,23.
The device blast furnace region mainly includes:The heat-exchanger rig 301,302 of No. 1, No. 2 blast furnace is from header tank 21 by respective Water pump 381,382 is connected, and carries out heat exchange, and the cooling that blast furnace needs to cool down is sent into the water source after exchange through water pump 311,312 Wall 361,362, furnace bottom 321,322, coiled pipe 331,332, the equipment such as air port hot-blast valve 341,342, tuyere small sleeve 351,352, The water source returned after cooling device, enters the heat exchange of heat exchanger 301,302 cold after being de-gassed through blast furnace degassing expansion drum 371,372 But after, recycled.
The other present invention is provided with temperature-detecting device, pressure-detecting device, gas flow, water-carrying capacity detection, liquid level inspection The detection means such as survey, are uniformly controlled with reference to system process, Control System Software, realize full-automatic production.
It should be further stated that implementation process has also set up sintering smoke from big gas duct, central cooler flue gas, each system water The hydronic cooling wall of amount, lithium-bromide solution, blast furnace, furnace bottom, coiled pipe, the dynamic data such as air port hot-blast valve, tuyere small sleeve Storehouse and mathematical modeling, realize the intellectualized operation control of system.
It is seen that, the present invention is used by using sintering circular-cooler waste heat, the waste gas low temperature exhaust heat of sintering machine large flue Lithium bromide steam refrigerating unit freezes, and can not only effectively improve the cooling effect of blast furnace, reduces the waste of waste gas residual heat resource, The electric energy of running can also be substantially reduced, water resource waste is reduced, simultaneously because cooling system amount adjustable range is broadening, operation When the step-less adjustment of refrigerating capacity can be carried out in load range, make blast furnace and equipment cooling obtain rationally effectively control, favorably In intensification of smelting process in BF, yield is improved, is that domestic low temperature heat, blast-furnace equipment cooling and the integrated application of resource are opened up A kind of new approach for more having market prospects, realizes recycling economy, is the developing direction that smelter realizes energy-saving and emission-reduction.
Also include a kind of method that utilization sintering low temperature waste heat cools down circulation water of blast furnace in technical scheme, its In, as shown in Fig. 2 comprising the following steps:
Step 1:Sintering machine large flue waste gas and central cooler 3,4 sections of waste gas are provided,
Step 2:Enter respective lithium bromide refrigerator using waste gas residual heat and carry out making cold water,
Step 3:Two groups of lithium bromide refrigerators share header tank and circulating water device,
Step 4:Header tank cold water is connected with blast furnace heat exchanger, carries out hot and cold water exchange,
Step 5:Cold water after heat exchange cools down blast furnace cooling stave, furnace bottom, coiled pipe, air port hot-blast valve, air port by water pump The equipment such as small set,
Step 6:Water source after cooling device is exchanged heat into heat exchanger, is recycled.
The above embodiments are only that the part of the present invention is embodied, and can not cover the whole of the present invention, in above-described embodiment And on the basis of accompanying drawing, those skilled in the art can obtain more according to the present invention on the premise of not paying creative work Embodiment, and other similar items are carried out with similar transformation, therefore on the premise of these do not pay creative work The embodiment of acquisition should be included within the scope of the present invention.

Claims (4)

1. a kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace, including sintering region and blast furnace region, its feature It is, including:
Described sintering region include central cooler 3,4 sections, sintering machine large flue, two-stage multi-pipe dust removing device, bag-type dust collector, Switch valve, the first lithium bromide refrigerator, the second lithium bromide refrigerator, circulating water device;Central cooler 3,4 sections of connection dedusting dresses Put, the outlet of dust arrester is connected by switching valve with the first lithium bromide refrigerator, and the first lithium bromide refrigerator passes through pump, valve Connected with header tank and circulating water device;Sintering machine large flue is connected with two-stage multi-pipe dust removing device, two-stage multi-pipe dust removing device Outlet is connected with bag-type dust collector, and bag-type dust collector is connected by the first switch valve with the second lithium bromide refrigerator, the Two switch valves are connected with blower fan, and the second lithium bromide refrigerator is connected by pump, valve with header tank and circulating water device;
Described blast furnace region, includes the cooling wall of No. 1 blast furnace, No. 2 blast furnaces, furnace bottom, coiled pipe, air port hot-blast valve, air port are small Set, heat exchanger, pipeline;The cooling wall of No. 1 blast furnace, No. 2 blast furnaces, furnace bottom, coiled pipe, air port hot-blast valve, tuyere small sleeve pass through water Pump is connected with respective heat exchanger, and heat exchanger is connected by water pump with header tank, the second lithium bromide refrigerator setup of entrances and exits valve, It can automatically switch, first, second lithium bromide refrigerator device common recycle water installations.
2. a kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace as claimed in claim 1, it is characterised in that the First, the cold water that the second lithium bromide refrigerator device is produced shares header tank.
3. a kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace as claimed in claim 1, it is characterised in that catchment Case is connected by respective water pump with the heat-exchanger rig of No. 1, No. 2 blast furnace.
4. a kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace as claimed in claim 1, it is characterised in that sintering Central cooler 3,4 sections of waste heat flue gases enter the first lithium bromide refrigerator after collecting, outlet outside chimney by arranging.
CN201510219469.9A 2015-04-28 2015-04-28 A kind of utilization sintering low temperature waste heat cools down the device of circulation water of blast furnace Active CN105318735B (en)

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CN107131768A (en) * 2016-02-29 2017-09-05 湖南天源工业设备有限公司 A kind of sintering furnace and its control method and cooling system
CN107686868B (en) * 2017-07-31 2019-07-05 山西建邦集团铸造有限公司 A kind of ironmaking equipment

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JPS59185740A (en) * 1983-04-06 1984-10-22 Kawasaki Steel Corp Cooler for sintering installation for recovering waste heat
CN203240834U (en) * 2013-05-09 2013-10-16 江苏双星彩塑新材料股份有限公司 Waste heat refrigeration recycling system
CN203336981U (en) * 2013-05-06 2013-12-11 北京佰能蓝天科技有限公司 Novel sintered ring refrigerator flue gas waste heat recycling system
CN204630404U (en) * 2015-04-28 2015-09-09 李正福 A kind of device utilizing sintering low temperature waste heat to cool circulation water of blast furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185740A (en) * 1983-04-06 1984-10-22 Kawasaki Steel Corp Cooler for sintering installation for recovering waste heat
CN203336981U (en) * 2013-05-06 2013-12-11 北京佰能蓝天科技有限公司 Novel sintered ring refrigerator flue gas waste heat recycling system
CN203240834U (en) * 2013-05-09 2013-10-16 江苏双星彩塑新材料股份有限公司 Waste heat refrigeration recycling system
CN204630404U (en) * 2015-04-28 2015-09-09 李正福 A kind of device utilizing sintering low temperature waste heat to cool circulation water of blast furnace

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