CN110468242B - Independent water taking waste heat recovery system for slag flushing water of blast furnace - Google Patents
Independent water taking waste heat recovery system for slag flushing water of blast furnace Download PDFInfo
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- CN110468242B CN110468242B CN201910710552.4A CN201910710552A CN110468242B CN 110468242 B CN110468242 B CN 110468242B CN 201910710552 A CN201910710552 A CN 201910710552A CN 110468242 B CN110468242 B CN 110468242B
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- flushing water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 389
- 239000002893 slag Substances 0.000 title claims abstract description 266
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 132
- 239000002918 waste heat Substances 0.000 title claims abstract description 21
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 23
- 239000003507 refrigerant Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 7
- 239000000284 extract Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides an independent water taking waste heat recovery system of blast furnace slag flushing water, which relates to the field of waste heat recovery and utilization of blast furnace slag flushing water in the metallurgical industry, and comprises a water taking pipeline, a water storage tank, a water taking water pump, a heat exchange unit, a slag flushing water outlet pipeline and a slag flushing water pump; when the blast furnace is used for flushing slag, the slag flushing water pump operates, and the high-temperature slag flushing water extracted by the water taking water pump can be converged with cold water in a slag flushing water outlet pipeline to be pumped by the slag flushing water pump for flushing slag after heat exchange; when the blast furnace does not wash slag, the slag washing water extracted by the water taking pump exchanges heat and then enters the bottom of the water storage tank, so that the heat exchange unit can continuously exchange heat.
Description
Technical Field
The invention relates to the field of waste heat recovery and utilization of blast furnace slag flushing water in the metallurgical industry, in particular to an independent water taking waste heat recovery system of the blast furnace slag flushing water.
Background
In order to ensure the recycling effect of the slag flushing water, the slag flushing water needs to be cooled down by a natural cooling or cooling tower and then continuously recycled, and in recent years, the recycling of the heat lost in the cooling process of the slag flushing water by adopting an indirect heat exchange method has been implemented in most steel plants.
The existing process flow for recycling the residual heat of the slag water in the slag flushing system is a direct heat-taking process system, specifically, an upper tower pump (hot water pump) of a blast furnace slag flushing system is used as slag water circulating power, a cut-off valve is arranged on an upper tower pump pipeline, slag water enters a heat exchange unit through a bypass, the slag water directly enters a cold water tank after heat exchange, and the heat exchange unit is connected with the slag water cooling tower in parallel; however, in practical application, as the slag water tank contains more suspended matters, plastic bottles, textiles, stones and other foreign matters besides water slag, the slag water heat exchange unit is extremely easy to be blocked by the foreign matters, so that the slag water heat exchanger cannot stably operate for a long time, the operation of a blast furnace slag flushing system is influenced, and the waste heat utilization of slag flushing water is also influenced.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects in the prior art and providing the independent water taking waste heat recovery system for the blast furnace slag flushing water, which not only ensures that a heat exchange unit is not easy to block, has low failure rate and is easy to maintain, but also can ensure that the heat exchange unit continuously exchanges heat.
The invention is realized by the following technical scheme: the utility model provides an independent water intaking waste heat recovery system of blast furnace slag flushing water, including the blast furnace, granulation tower and tank, the slag flushing water cooling of circulating is got into to the high temperature slag that the blast furnace produced through the granulation tower, in the slag flushing water entering tank, still include water intaking pipeline, the water storage tank, water intaking pump, heat transfer unit, slag water outlet pipeline and slag flushing water pump, be equipped with slag flushing water inlet and slag flushing water delivery port on the heat transfer unit, water intaking pipeline's water inlet and tank press close to liquid level department intercommunication, water intaking pipeline's delivery port is connected with the water storage tank, the water storage tank is connected with slag flushing water inlet through first pipeline, water intaking pump establishes on first pipeline, slag flushing water outlet pipeline's water inlet and tank intercommunication, slag flushing water outlet pipeline's delivery port is connected with the granulation tower, slag flushing water pump establishes on slag flushing water outlet pipeline, heat transfer unit's slag flushing water delivery port is connected with slag flushing water outlet pipeline through the second pipeline.
According to the above technical scheme, preferably, the connection part of the second pipeline and the slag water outlet pipeline forms a slag water return point, and the slag water return point is positioned at the front side of the slag water pump along the slag water flow direction.
According to the above technical solution, preferably, the second pipe is provided with a switching valve.
According to the above technical scheme, preferably, the heat exchange unit is further provided with a heat taking medium inlet and a heat taking medium outlet, and the refrigerant enters the heat exchange unit through the heat taking medium inlet and exchanges heat with the slag flushing water, and the heated refrigerant flows out from the heat taking medium outlet.
According to the above technical scheme, preferably, the water storage tank is a siphon tank.
The beneficial effects of the invention are as follows: the water inlet of the water taking pipeline is communicated with the position, close to the liquid level, of the water storage tank, so that the solid content in the slag water at the upper part of the water storage tank is low, the water quality is good along with the precipitation of solid particles and the like, and the high-temperature slag water at the upper part of the water storage tank is extracted by the heat exchange unit, so that the heat exchange unit is not easy to block, low in failure rate and easy to maintain; when the blast furnace is used for slag flushing, the slag flushing water pump operates, and the high-temperature slag flushing water extracted by the water taking water pump can be converged with cold water of a slag flushing water outlet pipeline to be pumped by the slag flushing water pump for slag flushing after heat exchange; when the blast furnace does not wash slag, the slag washing water extracted by the water taking pump exchanges heat and then enters the bottom of the water storage tank, so that the heat exchange unit can continuously exchange heat.
Drawings
Fig. 1 shows a schematic structural view of embodiment 1 according to the present invention.
Fig. 2 shows a schematic structural diagram of embodiment 2 according to the present invention.
Fig. 3 shows a prior art schematic diagram.
In the figure: 1. feeding a slag flushing water pump of a cooling tower; 2. feeding a slag flushing pipeline of a cooling tower; 3. a cooling tower cut-off valve; 4. a slag flushing water bypass; 5. a heat exchange unit; 6. a cold water tank; 7. a cooling tower; 8. a circulating water pump; 9. a granulating tower; 10. a waste heat switching valve; 11. a blast furnace; 12. a slag pool; 13. a water taking pipeline; 14. a water storage tank; 15. a water intake pump; 16. slag flushing water outlet pipeline; 17. slag flushing water pump; 18. a first pipe; 19. a second pipe; 20. slag water backwater points; 21. a hot water pump; 22. a water supply pipeline; 23. switching the valve; 24. a rotary drum filter; 25. a water slag conveyor belt; A. slag flushing water; B. and (3) a refrigerant.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present invention.
Example 1
As shown in fig. 3, the current process flow for recycling the waste heat of slag water with a slag water cooling tower in a slag flushing system is a direct heat taking process system, specifically, an upper cooling tower slag flushing water pump 1 of a blast furnace slag flushing system is used as circulating power of slag flushing water A, an upper cooling tower cut-off valve 3 is arranged on an upper cooling tower slag flushing pipeline 2, slag flushing water A enters a heat exchange unit 5 through a slag flushing water bypass 4, the slag flushing water A after heat exchange cooling directly enters a cold water tank 6, the heat exchange unit 5 is connected with a cooling tower 7 in parallel, and the slag flushing water A entering the cold water tank 6 is pumped into a granulating tower 9 through a circulating water pump 8; the slag flushing water bypass 4 is provided with a waste heat switching valve 10, and the heat exchange process is controlled through the waste heat switching valve 10 and the cooling tower cut-off valve 3. However, in practical application, since the slag water tank 12 contains many suspended matters, plastic bottles, textiles, stones and other foreign matters besides water slag, the foreign matters are very easy to cause the heat exchange unit 5 to be blocked, so that the heat exchange unit 5 cannot stably operate for a long time, the operation of a blast furnace slag flushing system is affected, and the waste heat utilization of slag flushing water A is also affected.
As shown in fig. 1, the invention provides a blast furnace slag flushing water independent water intake waste heat recovery system, which comprises a blast furnace 11, a granulating tower 9 and a water storage tank, wherein the water storage tank in the embodiment is a cold water tank 6 positioned at the lower part of a cooling tower 7, the granulating tower 9 is connected with a slag water tank 12, the cooling tower 7 is connected with the slag water tank 12, high-temperature slag generated by the blast furnace 11 enters the granulating tower 9 and is cooled by circulating slag flushing water A, the high-temperature slag flushing water A enters the slag water tank 12, the cold water tank 6 is positioned below the cooling tower 7, the slag flushing water A enters the cold water tank 6 through the cooling tower 7, and further comprises a water intake pipeline 13, a water storage tank 14, a water intake pump 15, at least one group of heat exchange units 5, a slag flushing water outlet pipeline 16 and a slag flushing water pump 17, the heat exchange units 5 comprise slag water flow channels and flow channels for exchanging heat with the slag water flow channels, in order to reduce the probability of blocking of the slag flushing water A in the slag water flow channels, the slag water channel is preferably a vertical straight channel, namely, the slag water A flows along the vertical direction in the flowing direction of the slag water channel, no folding process exists in the slag water channel, a slag water inlet connected with an inlet and an outlet of the slag water channel and a slag water outlet are arranged on the heat exchange unit 5, the water inlet of the water taking pipeline 13 is communicated with the position, close to the liquid surface, of the cold water tank 6, so that slag water with lower impurities in the cold water tank can be extracted by the water taking pipeline, the water outlet of the water taking pipeline 13 is connected with the water storage tank 14, the water storage tank 14 is connected with the slag water inlet through the first pipeline 18, the water taking pump 15 is arranged on the first pipeline 18, the water inlet of the slag water outlet pipeline 16 is communicated with the lower part of the cold water tank 6, the water outlet of the slag water outlet pipeline 16 is connected with the granulating tower 9, the slag water pump 17 is arranged on the slag water outlet pipeline 16, the slag flushing water outlet of the heat exchange unit 5 is connected with a slag flushing water outlet pipeline 16 through a second pipeline 19.
According to the above embodiment, preferably, the connection between the second pipe 19 and the slag water outlet pipe 16 forms the slag water return point 20, and along the flow direction of the slag water a, the slag water return point 20 is located at the front side of the slag water pump 17, when the slag water pump 17 is running, because the slag water return point 20 is located at the front side of the slag water pump 17, a negative pressure is formed at the slag water return point 20, so that the slag water outlet pipe 16 continuously extracts the slag water a in the cold water tank 6 to the slag water pump 17, and the slag water a passing through the heat exchange unit 5 can be effectively prevented from flowing back to the cold water tank 6 through the slag water outlet pipe 16, so that the slag water a is prevented from being cooled and mixed with the slag water a in the cold water tank 6 after heat exchange, the water intake temperature of the water intake pipe 13 is ensured, the recovery of the slag water a heat is facilitated, and the economic benefit is improved.
According to the above embodiment, it is preferable to further include a hot water pump 21 and a water supply pipe 22, wherein the hot water pump 21 directly pumps the slag flushing water a in the slag water tank 12 into the cooling tower 7 through the water supply pipe 22, so as to reduce the heat energy loss of the high-temperature slag flushing water a.
The specific working procedure is as follows:
the slag flushing water A passing through the granulating tower 9 enters the slag water tank 12, the hot water pump 21 directly pumps the high-temperature slag flushing water A in the slag water tank 12 into the cooling tower 7 through the water supply pipeline 22, solid particles in the high-temperature slag flushing water A sink into the bottom of the cold water tank 6, and as the water inlet of the water taking pipeline 13 is communicated with the position, close to the liquid level, of the cold water tank 6, solid particles and the like in the slag flushing water are precipitated along with the precipitation of the solid particles and the like in the cold water tank, so that the water taking pipeline 13 can continuously pump the high-temperature slag flushing water A with low solid content and good water quality at the upper part of the cold water tank 6 into the water storage tank 14, the water taking pump 15 pumps the slag flushing water A in the water storage tank 14 into the heat exchange unit 5 to perform heat exchange with the refrigerant B, and when the blast furnace 11 is used for slag flushing, the slag flushing water pump 17 runs, and the slag flushing water A subjected to heat exchange through the heat exchange of the heat exchange unit 5 and cold water in the slag flushing water outlet pipeline 16 are converged to the slag flushing water pump 17 to perform the circulating motion of the slag flushing water A; when the blast furnace 11 does not wash slag, the slag washing water A extracted by the water taking water pump 15 enters the bottom of the cold water tank 6 through the second pipeline 19 and the slag washing water outlet pipeline 16 after heat exchange, so that the heat exchange unit 5 can continuously exchange heat.
According to the above embodiment, preferably, the second pipe 19 is provided with a switching valve 23, and the switching of the heat exchange can be achieved by switching the switching valve 23 and the water intake pump 15.
According to the above embodiment, preferably, the heat exchange unit 5 is further provided with a heat taking medium inlet and a heat taking medium outlet, the refrigerant B enters the heat exchange unit 5 through the heat taking medium inlet and exchanges heat with the slag flushing water a, the heated refrigerant B flows out from the heat taking medium outlet, and the flowing direction of the refrigerant B is approximately opposite to the direction of the slag flushing water a, so that the heat exchange efficiency of the heat exchange unit 5 can be further enhanced.
According to the above embodiment, the water storage tank 14 is preferably a siphon tank, so the high-temperature slag flushing water a at the upper part of the cold water tank 6 can be automatically pumped into the siphon tank, thereby saving energy.
Example 2
As shown in fig. 2, the invention provides an independent water intake and waste heat recovery system for blast furnace slag flushing water, which comprises a blast furnace 11, a granulating tower 9 and a water storage tank, wherein the water storage tank in the embodiment is a slag water tank 12, slag flushing water A flowing out of the granulating tower falls into the slag water tank 12 through a drum filter 24, a slag conveying belt 25 for removing impurities in the drum filter is arranged in the drum filter 24, the drum filter and the slag conveying belt are all of the prior art, and not taken as innovation points of the invention, the independent water intake and waste heat recovery system further comprises a water intake pipe 13, a water storage tank 14, a water intake pump 15, at least one group of heat exchange units 5, a slag flushing water outlet pipe 16 and a slag flushing water pump 17, the heat exchange units 5 comprise slag water flow channels and refrigerant flow channels exchanging heat with the slag water flow channels, in order to reduce the probability of blocking of the slag flushing water A in the slag water flow channels, the slag water channel is preferably a vertical straight channel, namely, the slag water A flows along the vertical direction in the flowing direction of the slag water channel, no folding process exists in the slag water channel, a slag water inlet connected with an inlet and an outlet of the slag water channel and a slag water outlet are arranged on the heat exchange unit 5, the water inlet of the water taking pipeline 13 is communicated with the slag water tank close to the liquid level, so that the slag water with lower impurities in the slag water tank can be extracted by the water taking pipeline, the water outlet of the water taking pipeline 13 is connected with the water storage tank 14, the water storage tank 14 is connected with the slag water inlet through the first pipeline 18, the water taking pump 15 is arranged on the first pipeline 18, the water inlet of the slag water outlet pipeline 16 is communicated with the lower part of the slag water tank 6, the water outlet of the slag water tank outlet pipe 16 is connected with the granulating tower 9, the slag water pump 17 is arranged on the slag water tank outlet pipeline 16, the slag flushing water outlet of the heat exchange unit 5 is connected with a slag flushing water outlet pipeline 16 through a second pipeline 19.
According to the above embodiment, preferably, the connection between the second pipe 19 and the slag water outlet pipe 16 forms the slag water return point 20, and the slag water return point 20 is located at the front side of the slag water pump 17 along the flow direction of the slag water a, when the slag water pump 17 is running, because the slag water return point 20 is located at the front side of the slag water pump 17, a negative pressure is formed at the slag water return point 20, so that the slag water tank outlet pipe 16 continuously extracts the slag water a in the slag water tank 6 to the slag water pump 17, and the slag water a passing through the heat exchange unit 5 can be effectively prevented from flowing back to the slag water tank 6 through the slag water tank outlet pipe 16, so that the slag water a is prevented from being mixed with the slag water a in the slag water tank 6 after heat exchange, the water intake temperature of the water intake pipe 13 is ensured, the recovery of the slag water a heat is facilitated, and the economic benefit is improved.
The specific working procedure is as follows:
the slag flushing water A passing through the granulating tower 9 enters the slag water tank 12, solid particles in the high-temperature slag flushing water A passing through the rotary drum filter 24 are sunk into the bottom of the slag water tank 6, and as the water inlet of the water taking pipeline 13 is communicated with the slag water tank 12 close to the liquid level, solid particles and the like in the slag water are precipitated along with the slag flushing water in the slag water tank, so that the water taking pipeline 13 can continuously extract the high-temperature slag flushing water A with low solid content and good water quality at the upper part of the slag water tank 12 into the water storage tank 14, the water taking pump 15 pumps the slag flushing water A in the water storage tank 14 to the heat exchange unit 5 to exchange heat with the refrigerant B, the slag flushing water pump 17 runs when the blast furnace 11 is flushing slag, and the slag flushing water A subjected to heat exchange by the heat exchange unit 5 and cold water in the slag water tank outlet pipe 16 are converged to supply the slag flushing water pump 17 to perform slag flushing, so that the slag flushing water A circularly moves; when the blast furnace 11 does not wash slag, the slag washing water A extracted by the water taking pump 15 enters the bottom of the slag water pool 6 through the second pipeline 19 and the slag washing water outlet pipeline 16 after heat exchange, so that the heat exchange unit 5 can continuously exchange heat.
According to the above embodiment, preferably, the second pipe 19 is provided with a switching valve 23, and the switching of the heat exchange can be achieved by switching the switching valve 23 and the water intake pump 15.
According to the above embodiment, preferably, the heat exchange unit 5 is further provided with a heat taking medium inlet and a heat taking medium outlet, the refrigerant B enters the heat exchange unit 5 through the heat taking medium inlet and exchanges heat with the slag flushing water a, the heated refrigerant B flows out from the heat taking medium outlet, and the flowing direction of the refrigerant B is approximately opposite to the direction of the slag flushing water a, so that the heat exchange efficiency of the heat exchange unit 5 can be further enhanced.
According to the above embodiment, the water storage tank 14 is preferably a siphon tank, so that the high-temperature slag flushing water a at the upper part of the slag water bath 12 can be automatically pumped into the siphon tank, thereby saving energy.
The beneficial effects of the invention are as follows: the water inlet of the water intake pipeline 13 is communicated with the position, close to the liquid level, of the water storage tank, so that the solid content in the slag water at the upper part of the water storage tank is low and the water quality is good along with the precipitation of solid particles and the like, and the heat exchange unit 5 extracts high-temperature slag flushing water A at the upper part of the water storage tank, so that the heat exchange unit 5 is not easy to block, has low failure rate and is easy to maintain; when the blast furnace 11 is used for flushing slag, the slag flushing water pump 17 runs, and the high-temperature slag flushing water A extracted by the water taking water pump 15 can be combined with cold water in the slag flushing water outlet pipeline 16 to be used for flushing slag by the slag flushing water pump 17 after heat exchange; when the blast furnace 11 does not wash slag, the slag washing water A extracted by the water taking water pump 15 enters the bottom of the water storage tank after heat exchange, so that the heat exchange unit 5 can continuously exchange heat.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (4)
1. The utility model provides a blast furnace slag flushing water independent water intaking waste heat recovery system, includes blast furnace, granulation tower and tank, and the slag flushing water that the blast furnace produced gets into the granulation tower and passes through circulating in the slag flushing water cooling, and high temperature slag flushing water gets into the tank, and characterized in that still includes water intaking pipeline, water storage tank, water intaking pump, heat transfer unit, slag water outlet pipeline and slag flushing water pump, be equipped with slag flushing water inlet and slag flushing water delivery port on the heat transfer unit, water intaking pipeline's water inlet and tank are close to the liquid level department and are linked together, water intaking pipeline's delivery port is connected with the water storage tank, the water storage tank is connected with slag flushing water inlet through first pipeline, water intaking pump establishes on first pipeline, slag flushing water outlet pipeline's water inlet and tank are linked together, slag flushing water delivery port and the granulation tower are connected with the slag flushing water delivery pump establishes on slag flushing water outlet pipeline, heat transfer unit's slag flushing water delivery port is connected with the slag flushing water outlet pipeline through the second pipeline;
and a slag water backwater point is formed at the joint of the second pipeline and the slag water outlet pipeline, and is positioned at the front side of the slag water pump along the slag water flowing direction.
2. The system for recovering waste heat from independent water intaking of blast furnace slag flushing water according to claim 1, wherein a switching valve is arranged on the second pipeline.
3. The system for independently taking water and waste heat from blast furnace slag flushing water as set forth in claim 2, wherein the heat exchange unit is further provided with a heat taking medium inlet and a heat taking medium outlet, the refrigerant enters the heat exchange unit through the heat taking medium inlet and exchanges heat with the slag flushing water, and the heated refrigerant flows out from the heat taking medium outlet.
4. A blast furnace slag-flushing water independent water intake waste heat recovery system as claimed in claim 3, wherein the water storage tank is a siphon tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910710552.4A CN110468242B (en) | 2019-08-02 | 2019-08-02 | Independent water taking waste heat recovery system for slag flushing water of blast furnace |
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| CN201910710552.4A CN110468242B (en) | 2019-08-02 | 2019-08-02 | Independent water taking waste heat recovery system for slag flushing water of blast furnace |
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| CN110468242B true CN110468242B (en) | 2024-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113293245A (en) * | 2021-05-19 | 2021-08-24 | 中钢集团鞍山热能研究院有限公司 | High-temperature slag waste heat recovery system and method |
| CN113430309A (en) * | 2021-06-30 | 2021-09-24 | 广东韶钢松山股份有限公司 | Slag flushing system and slag removing method |
| CN113430310A (en) * | 2021-07-02 | 2021-09-24 | 南京品会聚能科技有限公司 | Slag flushing water treatment system and method |
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| CN103060497A (en) * | 2013-01-08 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Blast furnace slag sweeping water waste heat power generation system |
| CN210796508U (en) * | 2019-08-02 | 2020-06-19 | 天津华赛尔传热设备有限公司 | Blast furnace slag flushing water independent water taking waste heat recovery system |
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| CN103060497A (en) * | 2013-01-08 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Blast furnace slag sweeping water waste heat power generation system |
| CN210796508U (en) * | 2019-08-02 | 2020-06-19 | 天津华赛尔传热设备有限公司 | Blast furnace slag flushing water independent water taking waste heat recovery system |
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| CN110468242A (en) | 2019-11-19 |
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