CN202482332U - System for recovering waste heat of slag flushing water of blast furnace - Google Patents

System for recovering waste heat of slag flushing water of blast furnace Download PDF

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Publication number
CN202482332U
CN202482332U CN2012200284387U CN201220028438U CN202482332U CN 202482332 U CN202482332 U CN 202482332U CN 2012200284387 U CN2012200284387 U CN 2012200284387U CN 201220028438 U CN201220028438 U CN 201220028438U CN 202482332 U CN202482332 U CN 202482332U
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China
Prior art keywords
water
communicated
outlet
blast furnace
waste heat
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CN2012200284387U
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Chinese (zh)
Inventor
林青
张闯
何显荣
摆国睿
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BEIJING HUATAI RUNDA ENERGY-SAVING TECHNOLOGY CO LTD
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BEIJING HUATAI RUNDA ENERGY-SAVING TECHNOLOGY CO LTD
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Priority to CN2012200284387U priority Critical patent/CN202482332U/en
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/02Physical or chemical treatment of slags
    • C21B2400/022Methods of cooling or quenching molten slag
    • C21B2400/024Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/08Treatment of slags originating from iron or steel processes with energy recovery
    • 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
    • Y02P10/20Recycling
    • 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 utility model discloses a system for recovering waste heat of slag flushing water of a blast furnace. The system comprises a bottom filter pool communicated with a high-temperature slag flushing water mixture outlet of the blast furnace, a hot water pool with an inlet communicated with an outlet of the bottom filter pool, a filter with an inlet communicated with an outlet of the hot water pool and a heat transfer unit, wherein a pipeline on one heat supply side of the heat transfer unit is communicated with an outlet of the filter and a water collecting pool of a residue flushing pump room, and a pipeline on one heated side of the heat transfer unit is communicated with a water return port and a water supply port of a heating water pipeline. By means of the system for recovering the waste heat of the slag flushing water of the blast furnace, recycling of the waste heat of the slag flushing water of the blast furnace is achieved, and simultaneously the problem that a heating pipeline is easily blocked when high-temperature slag flushing water is directly used for heating is solved.

Description

Waste heat recovery system of blast furnace slag quenching water
Technical field
The utility model relates to heating water system waste-heat recovery device, particularly a kind of treatment system that reclaims waste heat of hot water for slag flushing in blast furnace.
Background technology
Steel industry is the big power consumer, in consumes energy, can produce a large amount of waste heat complementary energy.At present, the recovery utilization rate of steel industry waste heat complementary energy is quite low, and wherein, high-temperature residual heat is easy recovery relatively, at present in energy-saving and cost-reducing technological transformation major part obtain reclaiming; But the recovery of low temperature exhaust heat is almost nil, and the waste heat like blast furnace slag quenching water is wasted mostly.Be noted that low temperature exhaust heat accounts for 35% of total waste heat, therefore, the low temperature exhaust heat of steel industry exists huge recovery potentiality.
Iron And Steel Plant are in blast furnace iron-making process, and the slag temperature of generation is approximately 1000 ℃.At present, the treatment process of great majority ironmaking enterprise is: the high velocity jet chilling that this slag is provided by slag flushing pump in dreg flushing tank is washed into grain slag and granulation, for the usefulness of producing cement.Can produce big amount temperature in this process at 80~95 ℃ hot water.Usually,, need this part flushing cinder water be introduced air cooling tower behind sedimentation and filtration, cool to the flushing cinder that circulates once more below 50 ℃ in order to guarantee the recycle effect of flushing cinder water.So just make that heat runs off greatly in air cooling tower, both caused the waste of the energy, again environment has been caused thermal pollution.
The characteristics of blast furnace slag quenching water low temperature exhaust heat are: heat source temperature is lower, but its flow is quite big.Reclaim the waste heat of blast furnace slag quenching water, can save energy, can protect environment again, have great importance.At present, proposing has the way of recycling of using exhaust heat of slag flushing water: utilize the flushing cinder hydromining warm or make the bathing pool water, behind the blast furnace slag quenching water sedimentation and filtration, carry out water-hydrothermal exchange, through recycle pump heating water is delivered to the heating user again.The method that waste heat recovery is used for heating has less investment, equipment is simple, link is few, heat radiation less, using exhaust heat of slag flushing water utilization ratio advantages of higher, but also have some problems, because total dissolving soluble solids of flushing cinder water is too high; The water balance shape is easy to broken; The material that solubleness is low is prone to separate out and forms loose incrustation scale, and high rate filter can not make the suspended substance in the flushing cinder water fully filter again, adds that the terminal water flow velocity of heating is lower; Cause terminal line clogging, reduced the effect of heating.
The utility model content
The purpose of the utility model is to provide a kind of waste heat recovery system of blast furnace slag quenching water, and is not easy to be recycled in order to solve existing blast furnace slag quenching water waste heat, the problem of blocking blast furnace slag quenching water waste heat recovery pipeline easily.
A kind of waste heat recovery system of blast furnace slag quenching water of the utility model wherein, comprising: filter tank, an end is communicated with the high temperature flushing cinder water mixture outlet of this blast furnace; One hot tub, its inlet is communicated with the outlet in this filter tank, end; One strainer, its inlet is communicated with the outlet of this hot tub; One heat exchange unit, the pipeline of heat supply one side of this heat exchange unit is communicated with the outlet of this strainer and the water collecting basin of a flushing cinder pump house, and the pipeline that gets a hot side of this heat exchange unit is communicated with the water return outlet and the feed water inlet of a heating waterpipe.
One embodiment of the utility model waste heat recovery system of blast furnace slag quenching water, wherein, this strainer is a mechanical filter, is communicated with first valve between the inlet of this mechanical filter and the outlet of this hot tub.
One embodiment of the utility model waste heat recovery system of blast furnace slag quenching water, wherein, this heat exchange unit is the difunctional heat exchange unit of water-water and vapour-water, the pipeline of heat supply one side of this heat exchange unit also is communicated with steam pipe system.
One embodiment of the utility model waste heat recovery system of blast furnace slag quenching water; Wherein, also comprise a cooling tower, its inlet is communicated with the outlet of this hot tub; The outlet of this cooling tower is communicated with the water collecting basin in this flushing cinder room, is communicated with second valve between the inlet of this cooling tower and the outlet of this hot tub.
One embodiment of the utility model waste heat recovery system of blast furnace slag quenching water, wherein, the water return outlet of this heating waterpipe is communicated with a soft water water supply line.
One embodiment of the utility model waste heat recovery system of blast furnace slag quenching water, wherein, this soft water water supply line comprises a water softener and a soft water pond; The inlet of this water softener is communicated with water supply pipe, and the outlet of this water softener is communicated with the inlet in this soft water pond, and the outlet in this soft water pond is communicated with the water return outlet of this heating waterpipe.
In sum; The utility model waste heat recovery system of blast furnace slag quenching water; The high temperature sludge water mixture of blast furnace is carried out the thickness twice filter through a filter tank, an end and a strainer are set, and through a heat exchange unit is set, with the clear water in the heat transferred heating waterpipe of high temperature pulp water; Just realized the recycling of blast furnace slag quenching water waste heat, solved direct use high temperature pulp water simultaneously and heated and block easily the problem of heating pipe.
Description of drawings
Fig. 1 is the structural representation of the utility model waste heat recovery system of blast furnace slag quenching water.
Embodiment
Fig. 1 is the structural representation of the utility model waste heat recovery system of blast furnace slag quenching water; As shown in Figure 1, the utility model waste heat recovery system of blast furnace slag quenching water mainly comprises filter tank, an end 1, a hot tub 2, a cooling tower, a strainer 4, a heat exchange unit 5, a flushing cinder pump house water collecting basin 9, heating recycle pump 15, slag-washing-out pump 18, first valve 16 and second valve 17.
As shown in Figure 1, the concrete structure of the utility model waste heat recovery system of blast furnace slag quenching water is that the inlet in filter tank, the end 1 is communicated with high temperature flushing cinder water mixture outlet 3.The inlet of hot tub 2 is communicated with the outlet in filter tank, the end 1.The inlet of strainer 4 is communicated with the outlet of hot tub 2, and through the break-make between first valve, 16 controlled filter devices 4 and the hot tub 2.The inlet of the pipeline of heat exchange unit 5 heat supplies one side is communicated with the outlet of strainer 4, and the outlet of the pipeline of heat exchange unit 5 heat supplies one side is communicated with the inlet of flushing cinder pump house water collecting basin 9; Heat exchange unit 5 gets the water return outlet 7 of the inlet connection heating waterpipe of a hot side heat exchange pipeline, and heat exchange unit 5 gets the feed water inlet 6 of the outlet connection heating waterpipe of a hot side heat exchange pipeline.The inlet of cooling tower is communicated with the outlet of hot tub 2, and through the break-make between second valve, 17 controlled chilling towers and the hot tub 2, the outlet of cooling tower is communicated with flushing cinder room water collecting basin 9.Flushing cinder room water collecting basin 9 is communicated with blast furnace slag flushing water inlet 10.Be communicated with heating recycle pump 15 between the water return outlet 7 of heat exchange unit 5 and heating waterpipe.The exit of hot tub 2 is provided with slag-washing-out pump 18, extracts out with the flushing cinder water that hot tub 2 is held.
The utility model has also further been optimized the water charging system structure of heating waterpipe, and is as shown in Figure 1, and the water charging system of this heating waterpipe comprises water softener 12, soft water pond 13, constant pressure pump 14 and the mouth of a river 8 from the beginning.Wherein, the mouth of a river 8 is communicated with the inlet of water softeners 12 from the beginning, and the outlet of water softener 12 is communicated with the inlet in soft water pond 13, is communicated with through constant pressure pump 14 between the water return outlet 7 of heating waterpipe and the outlet in soft water pond 13.
In a kind of preferred embodiment of the utility model, have the big characteristics of dregginess according to blast furnace slag quenching water, strainer 4 can be selected the mechanical filter 4 that back flushing is easy and be not easy to block.
More preferably select as a kind of, this heat exchange unit 5 can be made up of the multi-section plate-type heat exchanger, and this heat exchange unit 5 can be water-water and the difunctional heat exchange unit of vapour-water.Present embodiment adopts water-water and two kinds of heat exchange forms of vapour-water with heat exchange unit 5, and promptly can under the pattern of water-water heat exchange, move again can be at the mode operation of vapour-water heat exchange for every interchanger; Through heat exchange unit 5 is communicated with security personnel's steam, move water-water heat exchange pattern under normal conditions, and very low in the weather temperature, the temperature of flushing cinder water is not enough to guarantee under the situation of heating effect, carries out replenishing of hot steam, to reach the heating requirement of resident family.So not only make the operational mode of heat exchange unit 5 more flexible, but also can under the extreme weather situation, satisfy the heating demand of resident family, better effects if.For example, in practical situation, can connect from plant area's steam pipe system and attract a steam-pipe as standby heat source, with when blast furnace stopping overhauls or weather when occurring extremely fluctuating as standby heat source through plate-type heat exchanger to the heat supply of heating waterpipe.
The working process of brief description the utility model waste heat recovery system of blast furnace slag quenching water.With reference to Fig. 1; The utility model waste heat recovery system of blast furnace slag quenching water divides two kinds of working ordeies; A kind of is the waste heat recovery working order, i.e. the required realization of the utility model pass through the working order that using exhaust heat of slag flushing water heats, another kind is not carry out the waste heat recovery working order; Promptly at weather under the situation of heat, the working order that does not need using exhaust heat of slag flushing water to heat.When system carries out the waste heat recovery working order; Turn-off second valve 17, the flushing cinder water of blast furnace discharging is exported 3 entering through high temperature flushing cinder water mixture at the bottom of filter tank 1 carry out coarse filtration first time, the flushing cinder water that passes through coarse filtration enters hot tub 2 retainings; After first valve 16 is opened; Through slag-washing-out pump 18 the flushing cinder water suction mechanical filters 4 in the hot tub 2 are carried out further finly filtration, flushing cinder water after further filtering, the heat supply duct that gets into heat exchange unit 5; And give the heating water of heating waterpipe with the thermal exchange of flushing cinder water through heat exchange unit 5, realize the recycling of using exhaust heat of slag flushing water with this.Flushing cinder water directly enters flushing cinder room water collecting basin 9 after flowing out heat exchange unit 5, flushing cinder room water collecting basin 9 is after catchmenting, and blast furnace slag flushing is carried out in circulation again, so, carries out recycling of flushing cinder water.Behind the heating water process heat exchange unit 5 of heating waterpipe, temperature raises again, and carries out heating through outdoor each buildings of pipe network entering once more.When system does not carry out the waste heat recovery working order, turn-off first valve 16, open second valve 17; Make hot tub 2 communicate, cool off getting in the flushing cinder water suction cooling tower in the hot tub 2 that the flushing cinder water after cooling is accomplished directly enters flushing cinder room water collecting basin 9 through slag-washing-out pump 18 with cooling tower; Flushing cinder room water collecting basin 9 is after catchmenting; Again blast furnace slag flushing is carried out in circulation, so, carries out recycling of flushing cinder water.
In sum; The utility model waste heat recovery system of blast furnace slag quenching water; The high temperature sludge water mixture of blast furnace is carried out the thickness twice filter through a filter tank, an end and a strainer are set, and through a heat exchange unit is set, with the clear water in the heat transferred heating waterpipe of high temperature pulp water; Just realized the recycling of blast furnace slag quenching water waste heat, solved direct use high temperature pulp water simultaneously and heated and block easily the problem of heating pipe.
The technical scheme of the utility model is disclosed as above by preferred embodiment.Those skilled in the art should recognize change and the retouching of under the situation of scope that does not break away from the appended the utility model that claim disclosed of the utility model and spirit, being done, and all belong within the protection domain of claim of the utility model.

Claims (6)

1. a waste heat recovery system of blast furnace slag quenching water is characterized in that, comprising:
Filter tank, one end is communicated with the high temperature flushing cinder water mixture outlet of this blast furnace;
One hot tub, its inlet is communicated with the outlet in this filter tank, end;
One strainer, its inlet is communicated with the outlet of this hot tub;
One heat exchange unit, the pipeline of heat supply one side of this heat exchange unit is communicated with the outlet of this strainer and the water collecting basin of a flushing cinder pump house, and the pipeline that gets a hot side of this heat exchange unit is communicated with the water return outlet and the feed water inlet of a heating waterpipe.
2. waste heat recovery system of blast furnace slag quenching water according to claim 1 is characterized in that, this strainer is a mechanical filter, is communicated with first valve between the inlet of this mechanical filter and the outlet of this hot tub.
3. waste heat recovery system of blast furnace slag quenching water according to claim 1 is characterized in that, this heat exchange unit is the difunctional heat exchange unit of water-water and vapour-water, and the pipeline of heat supply one side of this heat exchange unit also is communicated with steam pipe system.
4. waste heat recovery system of blast furnace slag quenching water according to claim 1; It is characterized in that; Also comprise a cooling tower; Its inlet is communicated with the outlet of this hot tub, and the outlet of this cooling tower is communicated with the water collecting basin of this flushing cinder pump house, is communicated with second valve between the inlet of this cooling tower and the outlet of this hot tub.
5. waste heat recovery system of blast furnace slag quenching water according to claim 1 is characterized in that, the water return outlet of this heating waterpipe is communicated with a soft water water supply line.
6. waste heat recovery system of blast furnace slag quenching water according to claim 5 is characterized in that, this soft water water supply line comprises a water softener and a soft water pond; The inlet of this water softener is communicated with water supply pipe, and the outlet of this water softener is communicated with the inlet in this soft water pond, and the outlet in this soft water pond is communicated with the water return outlet of this heating waterpipe.
CN2012200284387U 2012-01-21 2012-01-21 System for recovering waste heat of slag flushing water of blast furnace Active CN202482332U (en)

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Application Number Priority Date Filing Date Title
CN2012200284387U CN202482332U (en) 2012-01-21 2012-01-21 System for recovering waste heat of slag flushing water of blast furnace

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102994668A (en) * 2012-12-06 2013-03-27 秦皇岛首秦金属材料有限公司 Utilization method for waste heat of blast furnace slag
CN103436645A (en) * 2013-08-19 2013-12-11 北京国信安科技术有限公司 Heat supply system using low temperature waste heat of slag flushing water in blast furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102994668A (en) * 2012-12-06 2013-03-27 秦皇岛首秦金属材料有限公司 Utilization method for waste heat of blast furnace slag
CN103436645A (en) * 2013-08-19 2013-12-11 北京国信安科技术有限公司 Heat supply system using low temperature waste heat of slag flushing water in blast furnace

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