CN101798607A - Waste heat recovery system of blast furnace slag quenching water - Google Patents
Waste heat recovery system of blast furnace slag quenching water Download PDFInfo
- Publication number
- CN101798607A CN101798607A CN201010122535A CN201010122535A CN101798607A CN 101798607 A CN101798607 A CN 101798607A CN 201010122535 A CN201010122535 A CN 201010122535A CN 201010122535 A CN201010122535 A CN 201010122535A CN 101798607 A CN101798607 A CN 101798607A
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- CN
- China
- Prior art keywords
- blast furnace
- furnace slag
- waste heat
- heat recovery
- slag quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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Abstract
The invention relates to a waste heat recovery system of blast furnace slag quenching water, comprising a generation tower and a dehumidification tower. A sprayer for spraying dilute salt solution, filler and a water pipe communicated with a slag quenching water circulating system are arranged in the regeneration tower; a sprayer for spraying concentrated salt solution, filler and a water pipe in which cold water is introduced are arranged in the dehumidification tower; and dry and cold air from the dehumidification tower is introduced to a ventilating chamber. The blast furnace slag quenching water is used as a drive heat source for dehumidifying liquid and the recovered waste heat of the slag quenching water is used for producing dry air for ventilation, thereby preventing a large quantity of heat from being exhausted to the outside, reducing the pollution on the environment, changing wastes into valuables, and saving energy sources.
Description
Technical field
The present invention relates to blast furnace slag quenching water heat recovery technology field, more specifically to a kind of system that utilizes the liquid dehumidifying technology to reclaim the blast furnace slag quenching water waste heat.
Background technology
Iron and steel enterprise in the blast furnace ironmaking operation, 1～1.2 ton of the about consumption of new water of one ton of grain slag of punching out, the cycling use of water amount is about about 10 tons, circulating water temperature is about about 85 ℃, the physics heat of the blast furnace slag of being taken away by flushing cinder water accounts for about 8% of ironmaking energy consumption.Traditional blast furnace slag flushing water technology is with after the simple process of the high temperature flushing cinder water behind the flushing cinder through granulating pit and settling tank, enters cooling tower and cools about 55 ℃, and the flushing cinder water after the cooling is flushing cinder once more.Traditional flushing cinder water circulation system is discharged into external environment with heat by cooling tower, has caused huge waste heat waste.But, a large amount of heat recovery of blast furnace slag quenching water also there is not effective residual neat recovering system at present, its major cause is:
1. the blast furnace slag flushing water temp is lower, is about about 70～85 ℃ after general the processing, can not adopt the lithium-bromide absorption-type refrigerating machine group to reclaim this part waste heat;
2. the temperature of flushing cinder water is lower, can not use power units such as steam turbine or screw expander to reclaim this part waste heat and be used for generating;
3. blast furnace slag quenching water contains a large amount of solid impurities and different kinds of ions, the cost of water treatment height, and further reduce in the treating processes water temperature, the waste heat grade is lower.
The liquid dehumidifying technology can be utilized low-grade thermal source, has become a kind of new technology of industrial afterheat recovery.The principle of liquid dehumidifying technology is: in some salt (as calcium chloride, lithium chloride) aqueous solution, owing to be mixed with the salt quasi-molecule, the concentration of water molecules reduces, the also corresponding minimizing of the stream molecule number in the saturated air layer on the solution surface.When airborne partial pressure of water vapor during greater than the partial pressure of water vapor on salts solution surface, airborne stream molecule will shift to salts solution, utilize this character, can reach the purpose that makes air dehumidification.Dry air after the dehumidification can continue to utilize multiple method of cooling, it is handled satisfy indoor air-supply claimed condition point.
The liquid dehumidifying technology can utilize low-grade waste heat used heat as driving heat source, as solar water, industrial exhaust heat used heat etc., to the temperature minimum requirements of driving heat source more than 65 ℃.Use blast furnace slag flushing water-driven liquid dehumidification system, can obtain a large amount of dry air, be used to satisfy the requirement to artificial atmosphere such as enterprise's office building, factory building, reclaimed the waste heat of blast furnace slag quenching water simultaneously again, have the good energy-conservation environmental benefit.Therefore, proposing a kind of system that utilizes the liquid dehumidifying technology to reclaim the blast furnace slag quenching water waste heat is necessity to make full use of the blast furnace slag quenching water waste heat in fact.
Summary of the invention
The objective of the invention is to, a kind of waste heat recovery system of blast furnace slag quenching water that utilizes the liquid dehumidifying technology to reclaim the blast furnace slag quenching water waste heat is provided.
To achieve these goals, the technical solution used in the present invention is: a kind of waste heat recovery system of blast furnace slag quenching water, comprise regenerator column and dehumidifying tower, be provided for spraying spray thrower, the filler of rare salts solution and the water pipe that is communicated with the flushing cinder water circulation system in the regenerator column, be provided for spraying spray thrower, the filler of dense saline solution and the water pipe that feeds cold water in the dehumidifying tower, the cold dry air that comes out from the dehumidifying tower feeds the ventilating chamber.
The present invention is the driving heat source of blast furnace slag quenching water as liquid dehumidifying, and the waste heat recovery of flushing cinder water is used for the airy dry air to be used for making, and avoided a large amount of heat to extraneous environmental emission, reduced environmental pollution, and turned waste into wealth, and saved the energy.
Description of drawings
Fig. 1 is waste heat recovery system of blast furnace slag quenching water and flushing cinder water circulation system structural representation;
Fig. 2 is the structural representation of another embodiment of waste heat recovery system of blast furnace slag quenching water of the present invention.
Below in conjunction with accompanying drawing the present invention is described in detail.
Embodiment
Referring to Fig. 1, in frame of broken lines 1 is the flushing cinder water circulation system, and in frame of broken lines 2 is waste heat recovery system of blast furnace slag quenching water.The flushing cinder water circulation system pulp water that mainly liquidates carries out purifying treatment, and provides power for the circulation of flushing cinder water.Blast furnace slag is gone into granulating pit 13 from blast furnace 11 back of coming out by cinder-flushing groove 12 flushing cinders are laggard, blast furnace slag is taken away by dragveyer in granulating pit 13, afterwards, pyritous flushing cinder water enters settling tank 14 and enters flushing cinder water cycle pond 15 through after a series of purifying treatment, is squeezed into the regenerator column 21 of residual neat recovering system at last again by recycle pump 16.
Waste heat recovery system of blast furnace slag quenching water of the present invention mainly utilizes the liquid dehumidifying technology to come heat recovery to blast furnace slag quenching water.This system mainly comprises regenerator column 21, dehumidifying tower 22, cooling tower 23 and salts solution case 25.Regenerator column 21 is mainly used in rare salts solution that concentration is low and is regenerated as strong solution, reduces the temperature of flushing cinder water simultaneously.The regenerated principle is the rare salts solution by pyritous flushing cinder water heating spray, improves salts solution surface water vapor pressure, and the water molecules in the solution is shifted to regeneration air, reaches solution regenerated purpose.Be provided with spray thrower 211 and filler 213 in regenerator column 21 from top to bottom, water pipe 212 is arranged between the filler 213.In regenerator column 21, flow simultaneously these three kinds of fluids of salts solution, air and flushing cinder water are arranged.Rare salts solution in salts solution case 25 is transported to spray thrower 211 through pump 24, to filler 213 sprays, again from the bottom of regenerator column 21 flows back to salts solution case 25 finish heat transfer in regenerator column 21 after from the top of regenerator column 21.The high temperature flushing cinder water that comes out from recycle pump 16 enters the water pipe 212 the regenerator column 21, flows back to the flushing cinder water circulation system after reducing temperature, and recirculation is used to the slag of leaping high.Hot wet air enters from the bottom of regenerator column 21, discharges from the top again.In filler 213, rare salts solution of lower concentration and warm air carry out the caloic exchange, and the moisture of rare salts solution shifts to air side becomes high salt concentration solution, has reduced the flushing cinder water temp in the water pipe 212 simultaneously.The high temperature flushing cinder water that comes out from the flushing cinder water circulation system becomes salts solution regenerated driving heat source the system, and the blast furnace slag quenching water after the cooling enters the flushing cinder system of blast furnace once more, can recovered temperature is 65 ℃-95 ℃ using exhaust heat of slag flushing water.
The main effect of dehumidifying tower 22 is to utilize the dense saline solution of high density to air dewetting, and damp atmosphere becomes dry air after dehumidifying.The air dewetting process is a temperature-rise period, and cooling tower 23 is responsible for eliminating this part thermal load, makes air dewetting remain isothermal dehumidification process.The salts solution that comes out from dehumidifying tower 22 has absorbed airborne moisture, becomes dilute solution and uses for regenerator column 21, through regenerator column regeneration strong solution, can realize recycling of salts solution like this.Most of structure of dehumidifying tower 22 is identical with regenerator column 21, also is provided with spray thrower 221 and filler 223 from top to bottom, and water pipe 222 is arranged between the filler 223, and difference only is also to be provided with strainer 224 on the top of spray thrower 221.Outdoor hot wet air enters dehumidifying tower 22 after blower fan 225 pressurization, the dense saline solution in salts solution case 25 is transported to spray thrower 221 and sprays from top through pump 26.Dense saline solution carries out the wet exchange of heat at packing layer and wet air, and absorbing airborne moisture becomes dilute solution and flow back to salts solution case 25, and hot wet air becomes dry air through dehumidifying and discharges from the top of dehumidifying tower 22.The water coolant that cooling tower 23 provides enters water pipe 222 through water pump 27, is used to eliminate the temperature rise of dehumidification process.
The structure formation of dehumidifying tower 22 and regenerator column 21 is various: its profile can be for square or circular; Its structure formation can be for vertical or horizontal; The way of contact of wet air and liquid can be downflow system, reverse-flow or cross flow.Salts solution can be salts such as calcium chloride, lithium chloride, lithiumbromide, and the salts substances of other similarities, and the mass concentration interval of solution is: 30%-65%.
The dry air that comes out from the dehumidifying tower can be used for ventilations such as equipment room, factory building, can also be through the back that further cools for uses such as office building, life buildings.Like this, can make full use of from blast furnace slag quenching water and reclaim the waste heat of returning, turn waste into wealth and protect environment.Iron and steel enterprise equipment room, factory building generally have certain requirement to the humiture of room air, but air quality does not need to reach the requirement of comfort air conditioning system again, therefore dry air can be used for these factory buildings, the ventilation in equipment room, cooling.
Fig. 1 shows the embodiment that the dry air that will come out from the dehumidifying tower is used for equipment room, power house ventilation.Referring to Fig. 1, the dry air that comes out from dehumidifying tower 22 directly passes through air supply duct 31, sends into factory building (or equipment room) 28, improves the internal heat wet environment of factory building (or equipment room) 28, damp-heat air in the room is sent into regenerator column 21 by exhaust duct 32, discharges behind the absorption dilute solution moisture.Certain humiture requirement need be kept in a part of factory building, equipment room in the iron and steel enterprise, and the air requirements amount is bigger, and the large-scale ventilator of general at present employing ventilates, or arranges refrigeration air-conditioner in some equipment rooms.The energy consumption of this dual mode is all than higher, and sometimes only ventilates and can't meet the demands fully by ventilator.And the present invention adopts the liquid dehumidifying technology, reclaims the waste heat of blast furnace slag quenching water, makes dry air, be used for the ventilation in these factory buildings, equipment room, can guarantee indoor Air quality requirement, the power of fan that can reduce simultaneously, can cancel the refrigeration air-conditioner unit that the equipment room is provided with, reduce energy consumption.
Have relatively high expectations to the comfortableness of room air in office building, life building, traditional air-conditioning system adopts the very low refrigerated water (general about 7 ℃) of unit cooler preparation temperature that air is carried out cooling and dehumidifying.Tradition refrigeration air-conditioner mode has problems: 1, traditional way general requirement chilled water temperature is 7 ℃, and the vaporization temperature of unit cooler vaporizer is lower, makes that the refrigerating efficiency (COP value) of unit is also lower, and energy consumption is higher; 2, the water system temperature of traditional air-conditioning is lower, and insulation is had relatively high expectations, and output investment ratio is bigger; 3, the cooling air mode of traditional air-conditioning is the wet type cooling, and water cooler not only will reduce air themperature, also airborne moisture will be separated out, therefore condensed water can appear in system, coagulate water and can cause the drainage of dripping on the one hand, and easy breed bacteria, air quality influenced.
Iron and steel enterprise can adopt eminence flushing cinder water-driven liquid dehumidification system to obtain the lower dry air of water capacity, adopts the higher refrigerated water of unit cooler (or other low-temperature receivers) preparation temperature that dry air is just cooled off and can blow for air-conditioned room.Fig. 2 shows the embodiment that the dry air that will come out from the dehumidifying tower is used for office building (or life building).Referring to Fig. 2, assembled air-conditioner case 41 is set between air supply duct 31, assembled air-conditioner case 41 is provided with water cooler 42, and low-temperature receiver is the refrigerated water that unit cooler 43 makes.The dry air that comes out from dehumidifying tower 22 enters assembled air-conditioner case 41 by air supply duct 31, dry air in water cooler 42 with the refrigerated water heat exchange, reach air-conditioning air-supply requirement etc. wet cooling, send into the air-conditioned room of office building (or life building) 29 again by air supply duct 31.The room air draft is sent into regenerator column 21 by exhaust duct 32, discharges behind the moisture of absorption dilute solution.Compare with traditional air-conditioning system, the unit cooler in the present embodiment is an auxiliary cold source, has reduced the capacity of unit cooler, has reduced investment of equipment; The cold water temperature that unit cooler need make does not need low to 7 ℃, and general more than 12 ℃, the vaporization temperature of unit has improved 5 ℃.It is about 3～4% that 1 ℃ of the general every raising of vaporization temperature, the refrigerating efficiency of unit (COP value) are risen, so compare the refrigerating efficiency that has improved unit cooler with traditional air-conditioning system, saved the working cost of air-conditioning; Cooling air mode is the dry type cooling, does not have condensed water to separate out, and Air quality is relatively good, avoids the drainage of dripping; The insulation of system is less demanding, has saved the insulation cost.
Claims (8)
1. waste heat recovery system of blast furnace slag quenching water, it is characterized in that, described waste heat recovery system of blast furnace slag quenching water comprises regenerator column and dehumidifying tower, be provided for spraying spray thrower, the filler of rare salts solution and the water pipe that is communicated with the flushing cinder water circulation system in the described regenerator column, be provided for spraying spray thrower, the filler of dense saline solution and the water pipe that feeds cold water in the described dehumidifying tower, the cold dry air that comes out from described dehumidifying tower feeds the ventilating chamber.
2. waste heat recovery system of blast furnace slag quenching water according to claim 1, it is characterized in that, described waste heat recovery system of blast furnace slag quenching water also comprises the unit cooler that is arranged between dehumidifying tower and the ventilating chamber, and the cold dry air that comes out from described dehumidifying tower feeds the ventilating chamber again through after the described unit cooler earlier.
3. waste heat recovery system of blast furnace slag quenching water according to claim 1 and 2 is characterized in that, described waste heat recovery system of blast furnace slag quenching water also comprises the cooling tower that is communicated with the water pipe in the described dehumidifying tower.
4. waste heat recovery system of blast furnace slag quenching water according to claim 3, it is characterized in that, described waste heat recovery system of blast furnace slag quenching water also comprises the salts solution case, described salts solution case feeds rare salts solution and dense saline solution to the spray thrower of described regenerator column and dehumidifying tower respectively, and accepts respectively from dense saline solution and the rare salts solution of described regenerator column with the backflow of dehumidifying tower.
5. waste heat recovery system of blast furnace slag quenching water according to claim 4 is characterized in that, described salts solution is calcium chloride, lithium chloride or lithium-bromide solution.
6. waste heat recovery system of blast furnace slag quenching water according to claim 5 is characterized in that, the mass concentration of described salts solution is 30%～65%.
7. waste heat recovery system of blast furnace slag quenching water according to claim 1 and 2 is characterized in that, the damp-heat air that comes out from described ventilating chamber feeds described regenerator column.
8. waste heat recovery system of blast furnace slag quenching water according to claim 1 and 2 is characterized in that, the profile of described dehumidifying tower or regenerator column is square or circular.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010122535A CN101798607A (en) | 2010-03-11 | 2010-03-11 | Waste heat recovery system of blast furnace slag quenching water |
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| CN201010122535A CN101798607A (en) | 2010-03-11 | 2010-03-11 | Waste heat recovery system of blast furnace slag quenching water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321773A (en) * | 2011-09-13 | 2012-01-18 | 上海盛合新能源科技有限公司 | Blast furnace slag quenching water low temperature heat electric energy transformation system |
| CN102628090A (en) * | 2012-04-20 | 2012-08-08 | 江苏煌明能源科技有限公司 | Energy-saving and consumption-reducing method for air supply system of metallurgy blast furnace |
| CN102925609A (en) * | 2011-08-12 | 2013-02-13 | 同方节能工程技术有限公司 | Waste heat blast dehumidification system for blast furnace, and its dehumidification method |
| CN104501321A (en) * | 2014-12-22 | 2015-04-08 | 丛旭日 | Internal-cooled solution dehumidifying assembly |
| CN107723396A (en) * | 2017-09-29 | 2018-02-23 | 四川德胜集团钒钛有限公司 | A kind of blast furnace slag flushing water circulation system |
| CN110093464A (en) * | 2019-04-16 | 2019-08-06 | 浙江菲达环保科技股份有限公司 | A kind of blast furnace slag flushing residual heat heating and steam disappear white system and method |
| CN111121485A (en) * | 2020-01-09 | 2020-05-08 | 金先培 | Water-saving equipment of cooling tower |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201348326Y (en) * | 2009-01-22 | 2009-11-18 | 上海康诺能源技术有限公司 | Vapor cooling solar energy liquid moisture removing air conditioner |
| CN201770709U (en) * | 2010-03-11 | 2011-03-23 | 无锡市东方环境工程设计研究所有限公司 | Blast furnace slag flushing water waste-heat recovery system |
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2010
- 2010-03-11 CN CN201010122535A patent/CN101798607A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201348326Y (en) * | 2009-01-22 | 2009-11-18 | 上海康诺能源技术有限公司 | Vapor cooling solar energy liquid moisture removing air conditioner |
| CN201770709U (en) * | 2010-03-11 | 2011-03-23 | 无锡市东方环境工程设计研究所有限公司 | Blast furnace slag flushing water waste-heat recovery system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925609A (en) * | 2011-08-12 | 2013-02-13 | 同方节能工程技术有限公司 | Waste heat blast dehumidification system for blast furnace, and its dehumidification method |
| CN102321773A (en) * | 2011-09-13 | 2012-01-18 | 上海盛合新能源科技有限公司 | Blast furnace slag quenching water low temperature heat electric energy transformation system |
| CN102628090A (en) * | 2012-04-20 | 2012-08-08 | 江苏煌明能源科技有限公司 | Energy-saving and consumption-reducing method for air supply system of metallurgy blast furnace |
| CN102628090B (en) * | 2012-04-20 | 2014-07-23 | 江苏煌明能源科技有限公司 | Energy-saving and consumption-reducing method for air supply system of metallurgy blast furnace |
| CN104501321A (en) * | 2014-12-22 | 2015-04-08 | 丛旭日 | Internal-cooled solution dehumidifying assembly |
| CN104501321B (en) * | 2014-12-22 | 2017-10-24 | 丛旭日 | A kind of inner-cooled solution dehumidification unit |
| CN107723396A (en) * | 2017-09-29 | 2018-02-23 | 四川德胜集团钒钛有限公司 | A kind of blast furnace slag flushing water circulation system |
| CN110093464A (en) * | 2019-04-16 | 2019-08-06 | 浙江菲达环保科技股份有限公司 | A kind of blast furnace slag flushing residual heat heating and steam disappear white system and method |
| CN111121485A (en) * | 2020-01-09 | 2020-05-08 | 金先培 | Water-saving equipment of cooling tower |
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Application publication date: 20100811 |