CN112375858A - Environment-friendly blast furnace slag treatment steam recovery system and method - Google Patents
Environment-friendly blast furnace slag treatment steam recovery system and method Download PDFInfo
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- CN112375858A CN112375858A CN202011128634.7A CN202011128634A CN112375858A CN 112375858 A CN112375858 A CN 112375858A CN 202011128634 A CN202011128634 A CN 202011128634A CN 112375858 A CN112375858 A CN 112375858A
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- 239000002893 slag Substances 0.000 title claims abstract description 101
- 238000011084 recovery Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000009833 condensation Methods 0.000 claims abstract description 36
- 230000005494 condensation Effects 0.000 claims abstract description 36
- 238000010791 quenching Methods 0.000 claims abstract description 35
- 230000000171 quenching effect Effects 0.000 claims abstract description 33
- 238000005469 granulation Methods 0.000 claims abstract description 23
- 230000003179 granulation Effects 0.000 claims abstract description 23
- 238000005192 partition Methods 0.000 claims abstract description 23
- 238000011010 flushing procedure Methods 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 16
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- 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
-
- 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
-
- 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
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention provides an environment-friendly blast furnace slag treatment steam recovery system, which comprises a condensation tower, a dewatering rotary drum, a heat exchanger, a hot water tank and a buffer tank, wherein a condensation nozzle assembly and a demister are arranged at the top of the condensation tower, the lower part of the condensation tower is connected with a slag runner and a granulation tank, a partition plate is arranged in the condensation tower and divides the condensation tower into an upper part and a lower part, the bottom of the condensation tower is connected with the dewatering rotary drum, the top of the dewatering rotary drum is connected with the part below the partition plate of the condensation tower, the lower part of the partition plate of the condensation tower is connected with an air inlet of the heat exchanger, an air outlet of the heat exchanger is connected with the part above the partition plate of the condensation tower, a liquid outlet. The invention carries out condensation treatment on the quenching slag steam after heat exchange through the heat exchanger, effectively reduces the amount of discharged steam and the consumption of spray water, simultaneously uses the water discharged from the heat exchanger for slag flushing granulation of the granulation tank, and realizes the high-efficiency recovery of the quenching slag steam under the condition of not increasing the circulating water amount.
Description
Technical Field
The invention belongs to the technical field of blast furnace slag treatment, and particularly relates to an environment-friendly system and a method for recovering blast furnace slag treatment steam.
Background
For a long time, steam treatment of a blast furnace slag treatment system in the ferrous metallurgy industry is a difficult problem. Although many blast furnaces adopt an environment-friendly slag treatment system, the steam spraying and recycling effect is not ideal. Especially, when the amount of steam is large, the condensation effect of the steam is poor, and the problem of serious steam pollution still exists.
Blast furnace slag is the most main byproduct of the steel industry, about 300kg of blast furnace slag is produced per ton of iron, and the smelting slag temperature is about 1450 ℃, so that the blast furnace slag is a very high-quality heat source. At present, the treatment method of blast furnace slag at home and abroad mainly adopts a water quenching method, the slag is impacted and crushed by water to form slag particles, a part of high-temperature waste heat of the slag is converted into low-temperature waste heat of slag flushing water by adopting a water quenching process, the other part of the waste heat is converted into low-temperature waste heat of steam along with the gasification of the water, and the quenching slag steam contains H2S and SO2And the paint has strong corrosivity on peripheral equipment and steel structures, and forms white steam pollution.
At present, in the production of a blast furnace, part of steam generated by contacting slag flushing water with high-temperature slag is discharged at high altitude through a chimney and enters the atmosphere, part of steam is recycled in a steam condensation mode, and heat carried by the steam is hardly recycled. Although the quenching slag steam can be directly sprayed with water for condensation treatment, the steam amount is too large, the condensation effect is difficult to ensure, and the sprayed water is consumed greatly, so that a large amount of new water is wasted. In addition, if the slag flushing steam is dehumidified and whitened by a dehumidifier and other equipment, the power consumption is very remarkable due to too large steam quantity.
Because the steel industry at home and abroad lacks mature blast furnace quenching slag steam recovery technology, the conventional recovery method is adopted, and the investment is very large. Therefore, it is necessary to develop a new blast furnace slag-quenching steam recovery technology, especially a steam recovery technology capable of improving the existing blast furnace slag processing system, reducing the environmental pollution caused by slag-quenching steam, and realizing the recovery and utilization of steam resources.
Disclosure of Invention
The invention aims to provide an environment-friendly blast furnace slag treatment steam recovery system to reduce environmental pollution caused by quenching slag steam and realize the recovery and utilization of steam resources.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an environment-friendly blast furnace slag processing steam recovery system, includes condensing tower, dehydration rotary drum, heat exchanger, hot water tank and buffer tank, the condensing tower top is equipped with condensation nozzle subassembly and defroster, the slag runner that the condensing tower sub-unit connection blast furnace slag got into, and the end of slag runner is equipped with the granulation case, be equipped with the baffle in the condensing tower, divide into two parts from top to bottom with the condensing tower, slag runner and granulation case are located the baffle below, the condensing tower bottom with the feed inlet of dehydration rotary drum links to each other, the top of dehydration rotary drum links to each other with the following part of baffle of condensing tower, and the following part of baffle of condensing tower pass through the pipeline fan with the air inlet of heat exchanger links to each other, the gas outlet of heat exchanger with the above part of baffle of condensing tower links to each other, the liquid outlet of heat exchanger with the feed inlet of buffer tank is connected, the discharge gate of buffer tank, and a water outlet at the bottom of the dewatering rotary drum is connected with the hot water tank.
Furthermore, the baffle is arranged in an inclined mode, and the bottom end of the baffle is connected with the feed inlet of the buffer tank through a pipeline.
Furthermore, the condensation nozzle assembly comprises water pipes arranged in an upper layer and a lower layer and nozzles arranged on the water pipes at intervals.
Further, the demister is a wire mesh demister.
Furthermore, the heat exchanger adopts a dividing wall type heat exchanger.
Furthermore, the discharge port of the buffer tank is connected with the liquid inlet of the granulating box through a pump set.
Furthermore, the environment-friendly blast furnace slag treatment steam recovery system also comprises a cooling tower, wherein a water outlet of the hot water tank is connected with a water inlet of the cooling tower through a water return pump, and a water outlet of the cooling tower is divided into two sections of parallel pipelines which are respectively connected with the condensation nozzle assembly and the heat exchanger through a water supply pump.
In addition, the invention also provides a steam recovery method adopting the environment-friendly blast furnace slag treatment steam recovery system, which comprises the following steps:
slag water and quenching steam are generated after blast furnace slag is flushed and granulated by a granulating box, the quenching steam is led out from a condensing tower to a heat exchanger for gas-water heat exchange, and the temperature and the saturation humidity of the quenching steam are reduced;
returning the medium-temperature steam after heat exchange to the part above the partition plate of the condensing tower, spraying the medium-temperature steam through a condensing nozzle assembly, removing suspended liquid drops from residual gas in the condensing tower through a demister, and then discharging the residual gas into the atmosphere;
hot water generated by the heat exchanger is pumped into the granulating tank through the buffer tank for recycling and is used for slag flushing and granulating;
slag water generated at the bottom of the condensing tower is introduced into a dewatering rotary drum for slag-water separation, and the separated slag water enters a hot water tank.
Further, the above steam recovery method further comprises the following steps: after slag water in the hot water tank is sent to the cooling tower for cooling through the return water pump, cooling water is divided into two paths through the water supply pump and is respectively supplied to the condensing nozzle assembly and the heat exchanger for use.
Furthermore, the partition plate is obliquely arranged, and steam spray water and condensed water generated by spraying of the condensing nozzle assembly are introduced into the buffer tank along the inclined surface of the partition plate for storage and are used for slag flushing and granulating of the granulating tank.
Compared with the prior art, the invention has the beneficial effects that:
the environment-friendly steam recovery system for blast furnace slag treatment can exchange heat of the quenching slag steam through the heat exchanger, reduce the temperature and the saturation humidity of the quenching slag steam and then carry out condensation treatment, effectively reduce the consumption of discharged steam and spray water, reduce the environmental pollution caused by the quenching slag steam, realize the recovery and utilization of steam resources, simultaneously use the water output by the heat exchanger for slag flushing granulation of the granulation tank, realize the high-efficiency recovery of the quenching slag steam under the condition of not increasing the circulating water quantity, and greatly reduce the cost.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view showing the construction of an environmentally friendly blast furnace slag treatment steam recovery system according to the present invention.
Description of reference numerals: 1. a slag runner; 2. a granulation tank; 3. a partition plate; 4. a condensing tower; 5. a condensing nozzle assembly; 6. a demister; 7. a pipeline fan; 8. a heat exchanger; 9. a buffer tank; 10. a pump group; 11. a dewatering drum; 12. a hot water tank; 13. a water return pump; 14. a cooling tower; 15. and a water supply pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in figure 1, the invention provides an environment-friendly blast furnace slag treatment steam recovery system, which comprises a condensation tower 4, a dehydration rotary drum 11, a heat exchanger 8, a hot water tank 12 and a buffer tank 9, wherein the top of the condensation tower 4 is provided with a condensation nozzle assembly 5 and a demister 6, the lower part of the condensation tower 4 is connected with a slag runner 1 into which blast furnace slag enters, the tail end of the slag runner 1 is provided with a granulation tank 2, a partition plate 3 is arranged in the condensation tower 4 to divide the condensation tower 4 into an upper part and a lower part, the slag runner 1 and the granulation tank 2 are positioned below the partition plate 3, the bottom of the condensation tower 4 is connected with a feed inlet of the dehydration rotary drum 11, the top of the dehydration rotary drum 11 is connected with the part below the partition plate 3 of the condensation tower 4, the part below the partition plate 3 of the condensation tower 4 is connected with an air inlet of the heat exchanger 8 through a pipeline fan 7, an air outlet of the, the liquid outlet of the heat exchanger 8 is connected with the feed inlet of the buffer tank 9, the discharge outlet of the buffer tank 9 is connected with the liquid inlet of the granulation tank 2 through a pump set 10, and the bottom water outlet of the dewatering rotary drum 11 is connected with the hot water tank 12.
The demister 6 can be a wire mesh demister, and the heat exchanger 8 can be a dividing wall type heat exchanger.
In the embodiment, the blast furnace slag falls at the tail end of the slag runner 1 and is impacted by water sprayed from the granulating tank 2 to carry out slag flushing and granulating, the slag-water mixture firstly enters the bottom of the condensing tower 4 and then flows to the dewatering drum 11 to carry out slag-water separation, and the separated slag water enters the hot water tank 12. In the process, a large amount of high-temperature quenching slag steam is generated along with the blast furnace slag meeting water, the high-temperature quenching slag steam is gathered and led out to a heat exchanger 8 through a pipeline fan 7 to carry out gas-water heat exchange, the temperature and the saturation humidity of the high-temperature quenching slag steam are reduced after the heat exchange to form intermediate-temperature steam, the intermediate-temperature steam after the heat exchange is sent into the upper part of a partition plate 3 in a condensing tower 4 again, the intermediate-temperature steam is sprayed by water through a condensing nozzle assembly 5 to carry out condensation treatment on the steam, meanwhile, hot water generated by the heat exchange of the heat exchanger 8 is led into a buffer tank 9 to be stored, then, the water in the buffer tank 9 is pumped into a granulation box 2 through a pump group 10 to be used for slag flushing and granulation, the cyclic utilization of water resources is realized, the residual. In the embodiment, the quenching slag steam is subjected to gas-water heat exchange and then is subjected to condensation treatment by using spray water, the heat exchange efficiency is high, hot water is merged into the hot water tank 12 and can be used for heating in winter or refrigerating in summer, and the recycling of steam resources is realized; meanwhile, the quenching slag steam after heat exchange and temperature reduction is subjected to recondensation treatment, so that the amount of discharged steam and the consumption of spray water can be effectively reduced, and the environmental pollution caused by the quenching slag steam is reduced.
In a detailed implementation mode, the partition plate 3 is obliquely arranged in the condensation tower 4, and the bottom end of the partition plate 3 is communicated with the buffer tank 9 through a pipeline, so that steam spray water and condensed water sprayed by the condensation nozzle assembly 5 flow to the bottom along the inclined surface of the partition plate 3 and are introduced into the buffer tank 9 for storage, and the steam spray water and the condensed water are used for slag flushing and granulation of the granulation tank 2, and recycling of resources is realized.
In order to ensure the spraying effect on the quenching slag steam, the condensation nozzle assembly 5 comprises water pipes arranged at the upper layer and the lower layer and nozzles arranged at intervals on the water pipes, and the contact area between spray water and the quenching slag steam is increased through the structural design of the condensation nozzle assembly 5, so that the white quenching efficiency of the quenching slag steam is improved.
For the utilization of the hot water recovered in the hot water tank 12, in a specific embodiment, a water outlet of the hot water tank 12 is connected with a water inlet of the cooling tower 14 through a water return pump 13, the slag water is precipitated in the hot water tank 12 and then sent to the cooling tower 14 through the water return pump 13 for cooling, and the cooled cold water can be recycled, specifically, the water outlet of the cooling tower 14 is divided into two sections of parallel pipelines and is respectively connected with the condensing nozzle assembly 5 and the heat exchanger 8 through a water supply pump 15, and the cooled cold water of the cooling tower 14 can be circularly supplied to the condensing nozzle assembly 5 and the heat exchanger 8 for use, so that energy resources and cost are saved.
In the water circulation mode in the embodiment, the effluent water, the steam spray water and the condensed water of the heat exchanger 8 are firstly led to the buffer tank 9, then the effluent water, the steam spray water and the condensed water are pumped to the granulating tank 2 through the pump group 10 for slag flushing and granulating, the slag water is precipitated in the hot water tank 12 and then is sent to the cooling tower 14 through the water return pump 13 for cooling, and the cooled cold water is circularly supplied to the condensing nozzle assembly 5 and the heat exchanger 8 for use, so that the system can efficiently recover the quenching slag steam under the condition of not increasing the circulating water quantity, and the steam whitening is realized.
In conclusion, the environment-friendly steam recovery system for blast furnace slag treatment provided by the invention can exchange heat of the quenching slag steam through the heat exchanger, reduce the temperature and the saturation humidity of the quenching slag steam and then carry out condensation treatment, effectively reduce the amount of discharged steam and the consumption of spray water, reduce the environmental pollution caused by the quenching slag steam, realize the recovery and utilization of steam resources, and simultaneously can use the water output by the heat exchanger for slag flushing and granulation of a granulation tank, realize the efficient recovery of the quenching slag steam under the condition of not increasing the amount of circulating water, and greatly reduce the cost.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. The utility model provides an environment-friendly blast furnace slag processing steam recovery system which characterized in that: comprises a condensing tower, a dewatering rotary drum, a heat exchanger, a hot water tank and a buffer tank, wherein the top of the condensing tower is provided with a condensing nozzle component and a demister, the lower part of the condensing tower is connected with a slag runner into which blast furnace slag enters, and the tail end of the slag runner is provided with a granulation box, a baffle plate is arranged in the condensing tower to divide the condensing tower into an upper part and a lower part, the slag runner and the granulation box are positioned below the partition plate, the bottom of the condensing tower is connected with the feed inlet of the dewatering rotary drum, the top of the dewatering rotary drum is connected with the part below the partition plate of the condensing tower, the part below the partition plate of the condensing tower is connected with the air inlet of the heat exchanger through a pipeline fan, the air outlet of the heat exchanger is connected with the part above the partition plate of the condensing tower, the liquid outlet of the heat exchanger is connected with the feed inlet of the buffer tank, the discharge outlet of the buffer tank is connected with the liquid inlet of the granulation tank, and the bottom water outlet of the dehydration rotary drum is connected with the hot water tank.
2. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the baffle is arranged in an inclined mode, and the bottom end of the baffle is connected with the feed inlet of the buffer tank through a pipeline.
3. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the condensation nozzle assembly comprises water pipes arranged at the upper layer and the lower layer and nozzles arranged on the water pipes at intervals.
4. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the demister is a wire mesh demister.
5. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the heat exchanger adopts a dividing wall type heat exchanger.
6. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the discharge port of the buffer tank is connected with the liquid inlet of the granulation box through a pump set.
7. The environment-friendly blast furnace slag processing steam recovery system of claim 1, wherein: the water outlet of the cooling tower is divided into two sections of parallel pipelines which are respectively connected with the condensing nozzle assembly and the heat exchanger through a water supply pump.
8. The steam recovery method adopting the environment-friendly blast furnace slag treatment steam recovery system as defined in any one of claims 1 to 7, characterized by comprising the following steps:
slag water and quenching steam are generated after blast furnace slag is flushed and granulated by a granulating box, the quenching steam is led out from a condensing tower to a heat exchanger for gas-water heat exchange, and the temperature and the saturation humidity of the quenching steam are reduced;
returning the medium-temperature steam after heat exchange to the part above the partition plate of the condensing tower, spraying the medium-temperature steam through a condensing nozzle assembly, removing suspended liquid drops from residual gas in the condensing tower through a demister, and then discharging the residual gas into the atmosphere;
hot water generated by the heat exchanger is pumped into the granulating tank through the buffer tank for recycling and is used for slag flushing and granulating;
slag water generated at the bottom of the condensing tower is introduced into a dewatering rotary drum for slag-water separation, and the separated slag water enters a hot water tank.
9. The vapor recovery method of claim 8, further comprising the process of: after slag water in the hot water tank is sent to the cooling tower for cooling through the return water pump, cooling water is divided into two paths through the water supply pump and is respectively supplied to the condensing nozzle assembly and the heat exchanger for use.
10. The steam recovery method of claim 8, wherein the partition is disposed to be inclined, and the steam spray water and the condensed water generated by spraying the condensing nozzle assembly are introduced into the buffer tank along the inclined surface of the partition for storage, and are used for slag washing granulation in the granulation tank.
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| CN202011128634.7A CN112375858A (en) | 2020-10-21 | 2020-10-21 | Environment-friendly blast furnace slag treatment steam recovery system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832265A (en) * | 2021-08-06 | 2021-12-24 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam whitening technology and device |
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| CN1986836A (en) * | 2006-12-28 | 2007-06-27 | 中冶南方工程技术有限公司 | Environment friendly blast furnace slag treating process and system |
| CN101275171A (en) * | 2008-03-31 | 2008-10-01 | 中冶南方工程技术有限公司 | Environment-friendly blast furnace slag treatment process and system therefor |
| CN204874564U (en) * | 2015-08-25 | 2015-12-16 | 中冶赛迪工程技术股份有限公司 | Blast furnace slag water waste heat recovery device |
| CN109865404A (en) * | 2017-12-02 | 2019-06-11 | 哈尔滨工大金涛科技股份有限公司 | Slag steam dehumidifying of quenching disappears whitening method and device |
| CN109457063A (en) * | 2018-10-08 | 2019-03-12 | 哈尔滨工大金涛科技股份有限公司 | High temperature mixes wind type slag steam of quenching and disappears white device |
| CN211133502U (en) * | 2019-10-10 | 2020-07-31 | 上海申欣川环保工程技术有限公司 | Blast furnace slag flushing dead steam whitening system |
| CN214168013U (en) * | 2020-10-21 | 2021-09-10 | 中冶南方工程技术有限公司 | Environment-friendly blast furnace slag treatment steam recovery system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832265A (en) * | 2021-08-06 | 2021-12-24 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam whitening technology and device |
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