CN108325369B - Blast furnace granulated slag treatment circulating system and working method thereof - Google Patents
Blast furnace granulated slag treatment circulating system and working method thereof Download PDFInfo
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- CN108325369B CN108325369B CN201810398440.5A CN201810398440A CN108325369B CN 108325369 B CN108325369 B CN 108325369B CN 201810398440 A CN201810398440 A CN 201810398440A CN 108325369 B CN108325369 B CN 108325369B
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- 239000002893 slag Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 245
- 238000001816 cooling Methods 0.000 claims abstract description 50
- 239000002912 waste gas Substances 0.000 claims abstract description 29
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003546 flue gas Substances 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 4
- 230000000593 degrading effect Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- 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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- Water Supply & Treatment (AREA)
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- Treating Waste Gases (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a blast furnace water slag treatment circulating system and a working method of the system in the technical field of metallurgical iron making, wherein an outlet of the water treatment system is connected with an inlet of a circulating water tank through a third main pipeline, and an outlet of the circulating water tank is directly connected with a water inlet of a slag granulating complete system; the first main pipeline and the second main pipeline are double-layer pipelines; the double-layer pipeline comprises an internal hot air layer and an external water cooling layer; the external water cooling layer is connected with a water inlet of the slag granulating complete system through a fourth main pipeline; the two sides of the water treatment system are also provided with a fifth main pipeline, the fifth main pipeline is directly connected with an air inlet of the auxiliary fan system, and an air outlet of the auxiliary fan system is directly connected with the first main pipeline; the invention can recycle and reuse the waste gas and the waste water generated during the operation of the slag granulating complete system, prolongs the service life of the hot flue gas pipeline, avoids frequent replacement, reduces secondary pollution, improves the production efficiency and is beneficial to environmental protection.
Description
Technical Field
The invention relates to a blast furnace water slag treatment circulating system and a working method thereof in the technical field of metallurgical iron making.
Background
In the prior art, the temperature of slag generated by blast furnace ironmaking exceeds 1000 degrees, the slag is flushed into water slag by high-speed water flow in a cylindrical filtering device and granulated, and the Minte slag treatment system is a technology applied to blast furnace slag-water separation, and compared with other technologies, the Minte slag treatment system has the characteristics of simple equipment, small occupied area, long service life, simple maintenance, reliable operation, investment saving, safety, environmental protection, low operation cost, stable product quality, full automation of water slag treatment and the like; however, in the long-term use process, a large amount of heat and harmful gas thereof can be generated, if the heat is not timely utilized or treated, the pipeline can be used in a high-temperature environment throughout the year, so that the service life of the pipeline can be reduced, and the pipeline is broken in severe cases, which is unfavorable for long-term use.
Disclosure of Invention
The invention aims to provide a blast furnace water slag treatment circulation system, which can simultaneously recycle and reuse waste gas and waste water generated during the operation of a slag granulating complete system, prolong the service life of a hot flue gas pipeline, avoid frequent replacement, reduce secondary pollution, improve production efficiency and be beneficial to environmental protection.
The purpose of the invention is realized in the following way: the blast furnace water slag treatment circulation system comprises a slag granulating complete system, wherein a hot flue gas outlet is arranged above the slag granulating complete system, a water inlet and a water outlet are arranged on two sides of the slag granulating complete system, and the water inlet is directly connected with a circulating water tank; the slag granulating system is characterized in that a main fan system, an auxiliary fan system and a water treatment system are sequentially matched and arranged beside the slag granulating complete system; the hot flue gas outlet is connected with an air inlet of the main fan system through a first main pipeline, an air outlet of the main fan system is connected with an inlet of the water treatment system through a second main pipeline, an outlet of the water treatment system is connected with an inlet of the circulating water tank through a third main pipeline, and an outlet of the circulating water tank is directly connected with a water inlet of the slag granulating complete system; the first main pipeline and the second main pipeline are double-layer pipelines; the double-layer pipeline comprises an internal hot air layer and an external water cooling layer; the external water cooling layer is connected with a water inlet of the slag granulating complete system through a fourth main pipeline; the two sides of the water treatment system are also provided with a fifth main pipeline, the fifth main pipeline is directly connected with the air inlet of the auxiliary fan system, and the air outlet of the auxiliary fan system is directly connected with the first main pipeline.
When the slag granulating complete system works, a large amount of waste gas is generated and pumped by the main fan system under high pressure, enters the second main pipeline from the first main pipeline through the hot flue gas outlet, and enters the water treatment system from the second main pipeline; the water treatment system introduces the water in the circulating water tank into the water treatment system through the third main pipeline, performs atomization degradation treatment, cools the treated water flowing into the external water cooling layer, and flows out after cooling the first main pipeline and the second main pipeline, and then directly flows into a water inlet of the slag granulating complete system to ensure continuous water source supply in the slag granulating complete system; the residual flue gas in the water treatment system is sucked by the auxiliary fan system and flows into the built-in hot air layer of the first main pipeline through the fifth main pipeline; the residual waste gas enters the water treatment tank body together with the waste gas in the first main pipeline, so that the waste gas can sequentially form a reciprocating cycle.
The invention has the beneficial effects that the invention can simultaneously recycle and reuse the waste gas and the waste water generated during the operation of the slag granulating complete system, improves the production efficiency and is beneficial to environmental protection.
As a further improvement of the invention, in order to ensure that the redundant waste gas can be rapidly treated, the treatment efficiency is improved; the interface between the fifth pipeline and the first main pipeline is close to the hot flue gas outlet.
As a further improvement of the invention, the service life is prolonged in order to ensure that the outer surface of the hot air layer can be thoroughly cooled; the built-in hot air layer comprises a hot air layer inner surface and a hot air layer outer surface; the external water cooling layer comprises a water cooling layer surface and a water cooling layer inner surface; the hot air layer outer surface and the water cooling layer inner surface are arranged at intervals, a spiral sheet is arranged between the hot air layer outer surface and the water cooling layer inner surface, and the spiral sheet is circumferentially arranged between the hot air layer outer surface and the water cooling layer inner surface according to a certain screw pitch.
As a further improvement of the invention, in order to ensure that the waste flue gas can be efficiently treated and degraded; the water treatment system comprises a water treatment box body, a movable spraying device arranged above the inside of the water treatment box body, an inverted herringbone filter plate arranged in the middle of the water treatment box body and a collecting hopper arranged below the water treatment box body; the movable spraying device is arranged above the water treatment tank body through a track, the inverted herringbone filter plates are directly welded on two sides of the water treatment tank body, and the herringbone filter plates comprise an upper layer, a lower layer and a filter surface arranged in the middle; the two sides of the water treatment box body are also provided with filtering surface taking-out parts in cooperation with the upper layer and the lower layer.
As a further improvement of the invention, in order to ensure that the treated water inside the water treatment tank can be recycled; the automatic control valve is arranged below the collecting hopper on the water treatment box body, the fourth main pipeline comprises a first pipeline connected with the automatic control valve, a second pipeline connected with the first main pipeline, a third pipeline connected with the second main pipeline, water receiving ports respectively arranged on the first main pipeline and the second main pipeline, water removing ports respectively arranged on the first main pipeline and the second main pipeline, each water receiving port on the first main pipeline is connected with the second pipeline through the second pipeline, each water receiving port on the second main pipeline is connected with the third pipeline, the second pipeline and the third pipeline are respectively connected with the first pipeline, and water removing ports on the first main pipeline and the second main pipeline are directly connected to a water inlet of the slag granulating complete system; the water receiving port is directly connected with the external water cooling layer.
As a further improvement of the invention, the cooling effect is good in order to ensure that the residence time of the cooling water between the outer surface of the hot air layer and the inner surface of the water cooling layer is long; the water receiving ports on the first main pipeline and the water receiving ports on the second main pipeline are staggered by a certain angle.
As a further improvement of the invention, the invention aims to ensure that the redundant flue gas can be recovered in time for reprocessing; the fifth main pipeline comprises a fourth pipeline arranged above each water treatment system and a fifth pipeline connected with the fourth pipeline of each water treatment system, wherein the fifth pipeline is connected with an air inlet of the auxiliary fan system and then is directly communicated with the built-in hot air layer of the first main pipeline through an air outlet of the auxiliary fan system.
Another object of the present invention is achieved by: a working method of a blast furnace granulated slag treatment circulating system,
the method comprises the steps that firstly, a large amount of waste gas is generated when the slag granulating complete system works, is pumped by a main fan system under high pressure, enters a second main pipeline from a first main pipeline through a hot flue gas outlet, and enters the water treatment system from the second main pipeline;
introducing water in the circulating water tank into the water treatment tank body through a third main pipeline, atomizing and degrading waste gas entering the water treatment tank body through a spraying device, and filtering water dissolved with harmful substances through an inverted herringbone filter plate;
step three, filtered water flows into a first pipeline, the split water passing through the first pipeline flows into a second pipeline and a third pipeline respectively, and the water of the second pipeline and the third pipeline enters an external water cooling layer through water receiving ports on a first main pipeline and a second main pipeline;
step four, water entering the external water cooling layer through the water receiving ports respectively sequentially cools the internal hot air layer through the spiral sheets arranged in a surrounding manner, flows out through the water removing ports after finishing, and then directly flows into the water inlet of the slag granulating complete system, so that the continuous water source supply in the slag granulating complete system is ensured;
step five, the residual flue gas in the water treatment box body is sucked by the auxiliary fan system and enters the built-in hot air layer of the first main pipeline through the fourth pipeline and the fifth pipeline; the residual waste gas enters the water treatment tank body together with the waste gas in the first main pipeline, so that the waste gas can sequentially form a reciprocating cycle.
The invention has the beneficial effects that the invention can simultaneously recycle and reuse the waste gas and the waste water generated during the operation of the slag granulating complete system, improves the production efficiency and is beneficial to environmental protection.
As a further improvement of the invention, in order to ensure that the redundant waste gas can be rapidly treated, the treatment efficiency is improved; the interface between the fifth pipeline and the first main pipeline is close to the hot flue gas outlet.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a cross-sectional view of a first main pipe and a second main pipe according to the present invention.
The device comprises a circulating water tank 1, a pipeline No. 2, a pipeline No. 3, a pipeline No. 4, a pipeline No. 5, a first main pipeline, a complete slag granulating system 7, a pipeline No. 8, a fan system No. 9, a pipeline No. 10, a collecting hopper 11, a water receiving port 12, a filtering surface 13, a main fan system 14, a water treatment system 15, a water removing port 16, a second main pipeline 17, a mobile spraying device 18, a water treatment box body 19, an inverted herringbone filter plate 20, a lower layer 21, an upper layer 22, a filtering surface taking-out part 23, a water cooling layer surface 24, a water cooling layer inner surface 25, a spiral sheet 26, a hot air layer outer surface 27, a hot air layer inner surface 28, an external water cooling layer 29 and an internal hot air layer 30.
Detailed Description
Example 1
As shown in fig. 1-2, the object of the present invention is achieved in that: the purpose of the invention is realized in the following way: the blast furnace granulated slag treatment circulation system comprises a slag granulating complete system 7, wherein a hot flue gas outlet is arranged above the slag granulating complete system 7, a water inlet and a water outlet are arranged on two sides of the slag granulating complete system 7, and the water inlet is directly connected with a circulating water tank 1; a main fan system 14, an auxiliary fan system 9 and a water treatment system 15 are sequentially matched and arranged beside the slag granulating complete system 7; the hot flue gas outlet is connected with an air inlet of a main fan system 14 through a first main pipeline 6, an air outlet of the main fan system 14 is connected with an inlet of a water treatment system 15 through a second main pipeline 17, an outlet of the water treatment system 15 is connected with an inlet of a circulating bad water tank 1 through a third main pipeline, and an outlet of the circulating bad water tank 1 is directly connected with a water inlet of a slag granulating complete system 7; the first main pipeline 6 and the second main pipeline 17 are double-layer pipelines; the double-layer pipeline comprises an internal hot air layer 30 and an external water cooling layer 29; the external water cooling layer 29 is connected with a water inlet of the slag granulating complete system 7 through a fourth main pipeline 5; the two sides of the water treatment system 15 are also provided with a fifth main pipeline, the fifth main pipeline is directly connected with the air inlet of the auxiliary fan system 9, and the air outlet of the auxiliary fan system 9 is directly connected with the first main pipeline 6; the interface between the fifth pipeline 10 and the first main pipeline 6 is close to the hot flue gas outlet; the built-in hot air layer 30 includes a hot air inner surface 28 and a hot air outer surface 27; the external water cooling layer 29 comprises a water cooling layer surface 24 and a water cooling layer inner surface 25; the hot air layer outer surface 27 and the water cooling layer inner surface 25 are arranged at intervals, a spiral sheet 26 is arranged between the hot air layer outer surface 27 and the water cooling layer inner surface 25, and the spiral sheet 26 is circumferentially arranged between the hot air layer outer surface 27 and the water cooling layer inner surface 25 according to a certain pitch; the water treatment system 15 comprises a water treatment box body 19, a movable spraying device 18 arranged above the inside of the water treatment box body 19, an inverted herringbone filter plate 20 arranged in the middle of the water treatment box body 19 and a collecting hopper 11 arranged below the water treatment box body 19; the movable spraying device 18 is arranged above the water treatment box 19 through a track, and inverted herringbone filter plates 20 are directly welded on two sides of the water treatment box 19 and comprise an upper layer 22, a lower layer 21 and a filter surface 13 arranged in the middle; the two sides of the water treatment box body 19 are also provided with a filtering surface taking-out part 23 in combination with an upper layer 22 and a lower layer 21; an automatic control valve is respectively arranged below the collecting hopper 11 on the water treatment box 19, the fourth main pipeline 5 comprises a first pipeline 3 connected with the automatic control valve, a second pipeline 4 connected with the first main pipeline 6, a third pipeline 2 connected with the second main pipeline 17, water receiving ports 12 respectively arranged on the first main pipeline 6 and the second main pipeline 17, water removing ports 16 respectively arranged on the first main pipeline 6 and the second main pipeline 17, the second pipeline 4 is connected with each water receiving port 12 on the first main pipeline 6, the third pipeline 2 is connected with each water receiving port 12 on the second main pipeline 17, the second pipeline 4 and the third pipeline 2 are respectively connected with the first pipeline 3, and water removing ports 16 on the first main pipeline 6 and the second main pipeline 17 are directly connected to a water inlet of the slag granulating system 7; the water receiving port 12 is directly connected with an external water cooling layer 29; the water receiving ports 12 on the first main pipeline 6 and the water receiving ports 12 on the second main pipeline 17 are staggered by a certain angle; the fifth main pipeline comprises a fourth pipeline 8 arranged above each water treatment system 15, and a fifth pipeline 10 used for connecting the fourth pipeline 8 of each water treatment system 15, wherein the fifth pipeline 10 is connected with an air inlet of the auxiliary fan system 9 and then is directly communicated with the built-in hot air layer 30 of the first main pipeline 6 through an air outlet of the auxiliary fan system 9.
When the slag granulating complete system 7 works, a large amount of waste gas is pumped under high pressure through the main fan system 14, enters the air inlet of the main fan system 14 from the first main pipeline 6 through the hot flue gas outlet, enters the second main pipeline 17 from the air outlet of the main fan system 14, and enters the water treatment system 15 from the second main pipeline 17, at the moment, the large amount of waste gas passes through the built-in hot air layer 30 and cannot enter the external water cooling layer 29, and when a large amount of high-temperature waste gas enters the built-in hot air layer 30, the temperatures of the hot air layer outer surface 27 and the water cooling layer inner surface 25 of the built-in hot air layer 30 are high; the water treatment system 15 introduces the water in the circulating water tank 1 into the water treatment tank 19 through the third main pipeline, and carries out atomization degradation treatment on the waste gas entering the water treatment tank 19 through a spraying device, and simultaneously filters the water dissolved with harmful substances through the inverted herringbone filter plates 20, so that the retention time of the water on the inverted herringbone filter plates 20 can be prolonged by the inverted herringbone filter plates 20, and the filtering time can be prolonged; meanwhile, operators can take out the middle filter surface 13 through the filter surface taking-out parts 23 arranged on the upper layer 22 and the lower layer 21 at any time, so that the replacement is convenient; the filtered water flows into the first pipeline 3, flows into the second pipeline 4 and the third pipeline 2 respectively through the diversion of the first pipeline 3, and the water in the second pipeline 4 and the third pipeline 2 sequentially enters the external water cooling layer 29 through the water receiving ports 12 on the first main pipeline 6 and the second main pipeline 17; the water receiving ports 12 are staggered for a certain angle, so that the cooling time can be prolonged, and the cooling effect can be improved; the water entering the external water cooling layer 29 through the water receiving port 12 sequentially cools the internal hot air layer 30 through the spiral sheets 26 arranged in a surrounding manner, flows out through the water removing port 16 after the water cooling is finished, and then directly flows into the water inlet of the slag granulating complete system 7, so that the continuous water source supply in the slag granulating complete system 7 is ensured; at the same time, the residual waste gas slowly rises in the water treatment box 19, and then is sucked by the auxiliary fan system 9, passes through the fourth pipeline 8 and then enters the built-in hot air layer 30 of the first main pipeline 6 through the fifth pipeline 10; finally, the residual waste gas enters the water treatment box body 19 along with the waste gas in the first main pipeline 6, so that reciprocating circulation can be formed in sequence; the interface between the fifth conduit 10 and the first main conduit 6 is close to the hot flue gas outlet.
Example two
As shown in fig. 1-2, another object of the present invention is achieved by: a working method of a blast furnace granulated slag treatment circulating system,
the method comprises the steps that firstly, a large amount of waste gas generated during the operation of a slag granulating complete system 7 is pumped by a main fan system 14 under high pressure, enters a second main pipeline 17 from a first main pipeline 6 through a hot flue gas outlet, and enters the water treatment system 15 from the second main pipeline 17;
step two, the water treatment system 15 introduces the water in the circulating bad water tank 1 into the water treatment tank 19 through a third main pipeline, and carries out atomization degradation treatment on the waste gas entering the water treatment tank 19 through a spraying device, and simultaneously filters the water dissolved with harmful substances through an inverted herringbone filter plate 20;
step three, filtered water flows into the first pipeline 3, the split flow passing through the first pipeline 3 flows into the second pipeline 4 and the third pipeline 2 respectively, and the water in the second pipeline 4 and the third pipeline 2 enters the external water cooling layer 29 through the water receiving ports 12 on the first main pipeline 6 and the second main pipeline 17;
step four, water entering the external water cooling layer 29 through the water receiving ports 12 respectively sequentially cools the internal hot air layer 30 through the spiral sheets 26 arranged in a surrounding manner, flows out through the water removing ports 16 after the completion of the water cooling, and then directly flows into the water inlet of the slag granulating complete system 7, so that the continuous water source supply in the slag granulating complete system 7 is ensured;
step five, the residual flue gas in the water treatment box 19 is sucked by the auxiliary fan system 9 and enters the built-in hot air layer 30 of the first main pipeline 6 through the fourth pipeline 8 and the fifth pipeline 10; the residual exhaust gas enters the water treatment tank 19 together with the exhaust gas in the first main pipe 6, so that a reciprocating cycle can be formed in sequence.
The invention is not limited to the above embodiments, and based on the technical solution disclosed in the invention, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the invention.
Claims (5)
1. The blast furnace water slag treatment circulation system comprises a slag granulating complete system, wherein a hot flue gas outlet is arranged above the slag granulating complete system, a water inlet and a water outlet are arranged on two sides of the slag granulating complete system, and the water inlet is directly connected with a circulating water tank; the slag granulating system is characterized in that a main fan system, an auxiliary fan system and a water treatment system are sequentially matched and arranged beside the slag granulating complete system; the hot flue gas outlet is connected with an air inlet of the main fan system through a first main pipeline, an air outlet of the main fan system is connected with an inlet of the water treatment system through a second main pipeline, and a water inlet of the water treatment system is connected with an outlet of the circulating water tank through a third main pipeline; the outlet of the circulating water tank is directly connected with the water inlet of the slag granulating complete system; the first main pipeline and the second main pipeline are double-layer pipelines; the double-layer pipeline comprises an internal hot air layer and an external water cooling layer; the external water cooling layer is connected with a water inlet of the slag granulating complete system through a fourth main pipeline; the two sides of the water treatment system are also provided with a fifth main pipeline, the fifth main pipeline is directly connected with an air inlet of the auxiliary fan system, and an air outlet of the auxiliary fan system is directly connected with the first main pipeline; the built-in hot air layer comprises a hot air inner surface and a hot air outer surface; the external water cooling layer comprises a water cooling layer surface and a water cooling layer inner surface; the hot air layer is arranged at a certain distance from the inner surface of the water cooling layer, a spiral sheet is arranged between the outer surface of the hot air layer and the inner surface of the water cooling layer, and the spiral sheet is circumferentially arranged between the outer surface of the hot air layer and the inner surface of the water cooling layer according to a fixed screw pitch; the water treatment system comprises a water treatment box body, a movable spraying device arranged above the inside of the water treatment box body, an inverted herringbone filter plate arranged in the middle of the water treatment box body and a collecting hopper arranged below the water treatment box body; the movable spraying device is arranged above the water treatment box body through a track, the inverted herringbone filter plates are directly welded on two sides of the water treatment box body, and the inverted herringbone filter plates comprise an upper layer, a lower layer and a filter surface arranged in the middle; the two sides of the water treatment box body are also provided with filtering surface extraction parts in cooperation with an upper layer and a lower layer; the automatic control valve is arranged below the collecting hopper on the water treatment box body, the fourth main pipeline comprises a first pipeline connected with the automatic control valve, a second pipeline connected with the first main pipeline, a third pipeline connected with the second main pipeline, water receiving ports respectively arranged on the first main pipeline and the second main pipeline, water removing ports respectively arranged on the first main pipeline and the second main pipeline, each water receiving port on the first main pipeline is connected with the second pipeline, each water receiving port on the second main pipeline is connected with the third pipeline, the second pipeline and the third pipeline are respectively connected with the first pipeline, and water removing ports on the first main pipeline and the second main pipeline are directly connected to a water inlet of the slag granulating complete system; the water receiving port is directly connected with the external water cooling layer.
2. A blast furnace slag treatment circulation system as set forth in claim 1, wherein: the water receiving ports on the first main pipeline and the water receiving ports on the second main pipeline are staggered by a certain angle.
3. A blast furnace slag treatment circulation system as set forth in claim 1, wherein: the fifth main pipeline comprises a fourth pipeline arranged above each water treatment system and a fifth pipeline connected with the fourth pipeline of each water treatment system, wherein the fifth pipeline is connected with an air inlet of the auxiliary fan system and then is directly communicated with the built-in hot air layer of the first main pipeline through an air outlet of the auxiliary fan system.
4. A method of operating a blast furnace slag-processing circulation system according to any one of claims 1 to 3, characterized in that: comprising
Step one, when the slag granulating complete system works, a large amount of waste gas is pumped by a main fan system under high pressure, enters a second main pipeline from a first main pipeline through a hot flue gas outlet, and enters the water treatment system from the second main pipeline;
introducing water in the circulating water tank into the water treatment tank body through a third main pipeline, atomizing and degrading waste gas entering the water treatment tank body through a spraying device, and filtering water dissolved with harmful substances through an inverted herringbone filter plate;
step three, filtered water flows into a first pipeline, the split water passing through the first pipeline flows into a second pipeline and a third pipeline respectively, and the water of the second pipeline and the third pipeline enters an external water cooling layer through water receiving ports on a first main pipeline and a second main pipeline;
step four, water entering the external water cooling layer through the water receiving ports respectively sequentially cools the internal hot air layer through the spiral sheets arranged in a surrounding manner, flows out through the water removing ports after finishing, and then directly flows into the water inlet of the slag granulating complete system, so that the continuous water source supply in the slag granulating complete system is ensured;
step five, the residual flue gas in the water treatment box body is sucked by the auxiliary fan system and enters the built-in hot air layer of the first main pipeline through the fourth pipeline and the fifth pipeline; the residual waste gas enters the water treatment tank body together with the waste gas in the first main pipeline, so that the waste gas can sequentially form a reciprocating cycle.
5. The method of claim 4, wherein the interface between the fifth conduit and the first main conduit is proximate to the hot flue gas outlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20110277670A1 (en) * | 2010-05-14 | 2011-11-17 | Kyle Self | Systems and methods for processing co2 |
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