CN109457068B - Energy-saving and whitening treatment system for blast furnace granulated slag process - Google Patents
Energy-saving and whitening treatment system for blast furnace granulated slag process Download PDFInfo
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- CN109457068B CN109457068B CN201811609270.7A CN201811609270A CN109457068B CN 109457068 B CN109457068 B CN 109457068B CN 201811609270 A CN201811609270 A CN 201811609270A CN 109457068 B CN109457068 B CN 109457068B
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- 239000002893 slag Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims abstract description 38
- 230000002087 whitening effect Effects 0.000 title claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims description 32
- 238000005507 spraying Methods 0.000 claims description 17
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000005469 granulation Methods 0.000 description 9
- 230000003179 granulation Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/26—Drying gases or vapours
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The application discloses an energy-saving and whitening treatment system for a blast furnace granulated slag process, which comprises a granulating tower (1), a chimney (3), a filter tank (8) and a tap hole sealing cover (10), wherein the granulating tower (1) is connected with the chimney (3) through a granulating tower steam pipeline (20), the granulating tower (1) is connected with the filter tank (8) through a slag-water mixture pipeline (21), the filter tank (8) is connected with the chimney (3) through a filter tank steam pipeline (22), the tap hole sealing cover (10) is positioned at a tap hole of a blast furnace tap field (9), and the tap hole sealing cover (10) is connected with the chimney (3) through an exhaust pipeline (24). The energy-saving and whitening treatment system for the blast furnace granulated slag process can fully recover steam heat energy in the granulating process and effectively eliminate steam in the granulating process and a filtering tank.
Description
Technical Field
The application relates to the field of iron making in the metallurgical industry, in particular to an energy-saving and white-eliminating treatment system for a blast furnace water slag process.
Background
High-temperature liquid slag (1350 ℃ -1500 ℃) is generated during blast furnace smelting, 7 hundred million tons of molten iron is produced annually in China, and 2.5 hundred million tons of high-temperature liquid slag are generated. Related researches have been carried out for many years at home and abroad, and it is hoped to fully utilize the heat of blast furnace slag to realize waste heat recovery and utilization.
Chinese patent CN107815514a, publication date 2018, 3 and 20, discloses a system and method for recovering slag flushing water vapor and eliminating white fog, wherein the patent firstly adopts a spray cooling mode to realize vapor recovery, and then utilizes the flue gas of a hot air furnace to heat vapor to prevent white smoke. The method of the patent can effectively reduce the steam emission in the slag granulating process, but a large amount of steam heat energy is wasted and is not fully utilized.
In the treatment process of blast furnace slag, a large amount of high-temperature steam exists in the granulating process, and a large amount of steam exists on the surface of the filter tank for a long time during slag flushing, so that the heat energy of the high-temperature steam in the granulating process is fully utilized, the steam in the granulating process and the filter tank is effectively eliminated, and the energy-saving and whitening treatment of the blast furnace slag process is of great significance.
Disclosure of Invention
In order to recover heat energy in the blast furnace granulated slag, the application provides an energy-saving and whitening treatment system for the blast furnace granulated slag process, which can fully recover steam heat energy in the granulating process and effectively eliminate steam in the granulating process and a filter tank.
The application solves the technical problems that: the blast furnace granulated slag process energy-saving and whitening treatment system comprises a granulating tower, a chimney, a filter tank and a tap hole cover, wherein the granulating tower is connected with the chimney through a steam pipeline of the granulating tower, the granulating tower is connected with the filter tank through a slag-water mixture pipeline, the filter tank is connected with the chimney through a steam pipeline of the filter tank, the tap hole cover is positioned at a tap hole of a blast furnace tapping field, and the tap hole cover is connected with the chimney through an exhaust pipeline.
The granulating tower is internally provided with a granulator and a steam heat exchanger, the granulator is positioned below a high-temperature slag inlet of the granulating tower, the steam heat exchanger is positioned above the granulator, and the high-temperature slag inlet of the granulating tower is positioned between the steam heat exchanger and the granulator.
The granulating tower steam pipeline is provided with a first induced draft fan, the filtering tank steam pipeline is provided with a second induced draft fan, the exhaust pipeline is provided with a third induced draft fan, and the joint of the granulating tower steam pipeline and the granulating tower is positioned above the steam heat exchanger.
The spraying device comprises long spray guns and short spray guns which are uniformly and alternately arranged along the circumferential direction of the chimney, and a plurality of high-pressure spray heads are uniformly arranged on the long spray guns and the short spray guns.
The junction of filtering ponds steam pipe and chimney is located spray set's below, and the junction of granulation tower steam pipe and chimney is also located spray set's below, and exhaust pipe and chimney's junction is located back flush unit's top.
The filter tank comprises a first filter sub-tank and a second filter sub-tank which are arranged adjacently in parallel, the top of the filter tank is provided with a movable steam cover, and the movable steam cover can seal the first filter sub-tank or the second filter sub-tank.
The upper parts of the first filtering sub-tank and the second filtering sub-tank are respectively provided with a steam discharge port, the steam discharge ports are connected with a steam pipeline of the filtering sub-tank, and the bottom of the chimney is externally connected with a drainage pipeline.
The steam in the granulation tower can be led to the chimney through a first induced draft fan.
The steam in the filter tank can be led to the chimney through a second induced draft fan.
Hot air within the tap hole enclosure can be directed to the chimney through a third induced draft fan.
The beneficial effects of the application are as follows:
1. the application provides a heat exchange-spraying-defoaming-heating steam treatment measure, which can effectively reduce the discharge of sulfur-containing steam in the blast furnace slag process, realize the whitening treatment and reduce the air pollution.
2. The application can fully return the steam heat energy in the slag granulating process, and realize the effective recycling of energy.
3. The application adopts the heat exchanger without energy consumption to realize the heat energy utilization of the steam in the granulating process, and has the advantages of low operation cost and high benefit.
4. The application fully utilizes the hot air of the blast furnace tapping hole to perform the whitening treatment of the water slag process, thereby avoiding the waste of heat energy of the tapping hole.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
Fig. 1 is a top view of an energy-saving and whitening treatment system for a blast furnace slag process according to the present application.
Fig. 2 is a schematic structural view of the granulation tower.
FIG. 3 is a schematic view of the structure of the chimney and filter tank.
Fig. 4 is a top view of the spray device.
1. A granulating tower; 2. a first induced draft fan; 3. a chimney; 4. a second induced draft fan; 51. a first filter tank steam conduit valve; 52. a second filter tank steam conduit valve; 61. a first slag-water mixture pipeline valve; 62. a second slag-water mixture pipeline valve; 7. a movable steam shield; 8. a filtering tank; 81. a first filtering sub-tank; 82. a second filtering sub-tank; 9. a blast furnace cast house; 10. a tap hole cover; 11. a third induced draft fan; 12. a steam heat exchanger; 13. a granulator; 14. a back flushing device; 15. a demister; 16. a spraying device; 17. a long spray gun; 18. a short lance; 19. a high pressure nozzle; 20. a granulating tower steam conduit; 21. a slag-water mixture pipeline; 22. a filter tank steam pipe; 23. a drainage pipe; 24. an exhaust duct.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The blast furnace granulated slag process energy-saving and whitening treatment system comprises a granulating tower 1, a chimney 3, a filter tank 8 and a tap hole cover 10, wherein the granulating tower 1 is connected with the chimney 3 through a granulating tower steam pipeline 20, the granulating tower 1 is connected with the filter tank 8 through a slag-water mixture pipeline 21, the filter tank 8 is connected with the chimney 3 through a filter tank steam pipeline 22, the tap hole cover 10 is positioned at a tap hole of a blast furnace tapping field 9, and the tap hole cover 10 is connected with the chimney 3 through an exhaust pipeline 24, as shown in figures 1 to 3.
In the present embodiment, a granulator 13 and a steam heat exchanger 12 are provided in the granulation tower 1, the granulator 13 is located below the high-temperature slag inlet of the granulation tower 1, the steam heat exchanger 12 is located above the granulator 13, and the high-temperature slag inlet of the granulation tower 1 is located between the steam heat exchanger 12 and the granulator 13. The granulator is positioned below the inlet of high-temperature slag of the granulating tower, and the steam heat exchanger is positioned above the granulator and near the top of the granulating tower.
In this embodiment, the first induced draft fan 2 is disposed on the granulating tower steam pipeline 20, the second induced draft fan 4 is disposed on the filtering tank steam pipeline 22, the third induced draft fan 11 is disposed on the exhaust pipeline 24, and the junction of the granulating tower steam pipeline 20 and the granulating tower 1 is located above the steam heat exchanger 12. The uncondensed steam in the granulating tower is introduced into the chimney from a steam pipeline on the side of the top of the granulating tower by an induced draft fan.
In this embodiment, the spraying device 16, the demister 15 and the backwashing device 14 are sequentially arranged in the chimney 3 from bottom to top, the spraying device 16 can be provided with one or more layers, the spraying device 16 comprises long spray guns 17 and short spray guns 18 which are uniformly and alternately arranged along the circumferential direction of the chimney 3, and a plurality of high-pressure spray heads 19 are uniformly arranged on the long spray guns 17 and the short spray guns 18, as shown in fig. 4.
In this embodiment, the junction of the filter tank steam pipe 22 and the chimney 3 is located below the sprinkler 16, the junction of the granulation tower steam pipe 20 and the chimney 3 is also located below the sprinkler 16, and the junction of the exhaust pipe 24 and the chimney 3 is located above the backwash assembly 14, as shown in FIG. 3.
In this embodiment, the filter tank 8 includes a first filter sub-tank 81 and a second filter sub-tank 82 disposed adjacently in parallel, and the movable steam hood 7 is provided on the top of the filter tank 8, and the movable steam hood 7 can seal the first filter sub-tank 81 or the second filter sub-tank 82. The movable steam cover is arranged at the top of the filtering tank, the movable steam cover seals the filtering tank during slag flushing, and the steam cover is removed after slag flushing is stopped, so that slag particles in the filtering tank can be cleaned conveniently during slag grabbing operation.
In this embodiment, the upper parts of the first filtering sub-tank 81 and the second filtering sub-tank 82 are respectively provided with a steam discharge port, the steam discharge ports are connected with the filtering tank steam pipeline 22, and the bottom of the chimney 3 is externally connected with the drainage pipeline 23. The filtering tank steam pipe 22 is respectively and correspondingly connected with the first filtering sub-tank 81 and the second filtering sub-tank 82, and the slag-water mixture pipe 21 is respectively and correspondingly connected with the first filtering sub-tank 81 and the second filtering sub-tank 82, as shown in fig. 1. The drain pipe 23 may allow water in the chimney 3 to enter the cooling tower for condensed water, shower water, rinse water.
The first filtering tank steam pipeline valve 51 and the second filtering tank steam pipeline valve 52 are arranged on the filtering tank steam pipeline 22, and the first slag water mixture pipeline valve 61 and the second slag water mixture pipeline valve 62 are arranged on the slag water mixture pipeline 21. The first filter tank steam line valve 51 is operated in a reverse state to the second filter tank steam line valve 52, such that when the first filter tank steam line valve 51 is opened, the second filter tank steam line valve 52 is closed. The first slag water mixture pipeline valve 61 and the second slag water mixture pipeline valve 62 are in opposite working states.
An induced draft fan is arranged between the filter tank and the chimney, and steam on the surface of the filter tank is pumped out and then enters the chimney. The inlet of the filter tank steam into the chimney is positioned below the spraying device. A tap hole sealing cover is arranged at a blast furnace tapping field, and hot air at the tap hole is led to a chimney by a draught fan. The hot air inlet of the tap hole into the chimney is positioned above the back flushing device in the chimney.
The working process of the energy-saving and whitening treatment system for the blast furnace granulated slag process is described below.
A granulator 13 is arranged below an inlet of high-temperature slag (1350 ℃ -1500 ℃) of the granulating tower 1, the high-temperature slag completes granulation under the action of a large amount of high-speed granulating water (about 40 ℃ -45 ℃), and a slag-water mixture falls into the bottom of the granulating tower 1. The bottom of the granulating tower 1 is introduced with conveying water (about 40-45 ℃), and the slag-water mixture enters a first filtering sub-tank 81 or a second filtering sub-tank 82 of the filtering tank 8 under the action of the conveying water.
A steam heat exchanger 12 is arranged above the granulator 13 and close to the top of the granulating tower 1, and a steam pipeline and a first induced draft fan 2 are arranged on the side surface of the top of the granulating tower 1. Under the action of the first induced draft fan 2, steam (about 80-100 ℃) generated in the slag granulating process moves upwards in the granulating tower 1, and when the steam passes through the steam heat exchanger 12, normal-temperature water (about 25-35 ℃) introduced into the steam heat exchanger 12 absorbs a large amount of heat energy to become hot water (about 60-80 ℃), and a large amount of steam is condensed into water drops falling into the bottom of the granulating tower 1 in the heat exchange process. The uncondensed steam enters the chimney 3 from a steam pipe at the top side of the granulating tower 1.
A layer (or a plurality of layers) of spraying device 16, a foam remover 15 and a back flushing device 14 are sequentially arranged above the steam pipeline outlet of the granulating tower in the chimney 3.
The spraying device 16 consists of a plurality of long spray guns 17 and short spray guns 18 which are uniformly and crosswise arranged at the same height in the chimney 3, and a plurality of high-pressure spray heads 19 are uniformly arranged on the long spray guns and the short spray guns. Depending on the process requirements, several levels of long 17 and short 18 lances and their accompanying high pressure spray heads 19 may be arranged at different heights. Spray water (about 40-45 ℃) is sprayed out from the high-pressure spray head 19 to form an atomization state in the chimney, and the atomized spray water is uniformly distributed in the inner space of the chimney.
The inlet of the granulation tower 1 for steam into the stack 3 is located below the spraying device 16. After the uncondensed steam in the granulating tower enters the chimney 3, the uncondensed steam becomes condensed water under the action of atomized spray water, and the condensed water and the spray water fall into the bottom of the chimney 3 and enter the cooling tower along a condensed water spray water pipeline.
A demister 15 is arranged above the spraying device 16 to remove uncondensed steam and small water drops; the back flushing device 14 regularly back-flushes the demister 15, so that the demister 15 is prevented from being blocked after long-term use.
The slag-water mixture pipeline led out from the bottom of the granulating tower 1 is connected with the junction of the two filtering tank pipelines, and the two filtering tank pipelines respectively enter the two filtering tanks. The first slag-water mixture pipeline valve 61 and the second slag-water mixture pipeline valve 62 are respectively arranged on the pipelines entering the two filtering ponds, and when the second filtering sub-pond 82 is needed to be used, the second slag-water mixture pipeline valve 62 is opened, and the first slag-water mixture pipeline valve 61 is closed.
The top of the filtering tank is provided with a movable steam cover 7 for sealing steam on the surface of the filtering tank; the movable steam hood 7 is moved away after the slag flushing is stopped, so that slag can be conveniently grabbed on the first filtering sub-tank 81 or the second filtering sub-tank 82.
Two steam pipelines (the steam pipeline 22 of the filter tank) are respectively led out from the side wall openings of the filter tank at the position, close to the top, of the side wall of the first filter tank 81 or the second filter tank 82, close to the chimney 3, and valves (namely a first steam pipeline valve 51 of the filter tank and a second steam pipeline valve 52 of the filter tank) are arranged on the two steam pipelines. The two steam pipes are connected with a steam main pipe after being combined, a second induced draft fan 4 is arranged on the steam main pipe, the filter tank steam is led into the chimney 3 through the steam main pipe, and the steam main pipe is positioned below the spraying device 16 at the inlet of the chimney 3.
Under the action of the second induced draft fan 4 and the movable steam hood 7 of the filter tank, steam on the surface of the filter tank is pumped out of the filter tank and enters the chimney 3, and is formed into water drops under the action of the spraying device 16 in the chimney, and the water drops fall into the bottom of the chimney and enter the cooling tower.
When the second filtering sub-tank 82 is used for slag flushing, a large amount of steam is generated, at this time, the movable steam hood 7 is positioned above the second filtering sub-tank 82, the first filtering sub-tank steam pipeline valve 51 of the first filtering sub-tank 81 is closed, the second filtering sub-tank steam pipeline valve 52 of the second filtering sub-tank 82 is opened, and steam enters the chimney 3 from the surface of the second filtering sub-tank 82 through the steam header pipe.
The tap hole periphery of the blast furnace tapping field 9 is in a high temperature state for a long time, a tap hole cover 10 is arranged, hot air of the tap hole is led to the chimney 3 by a third induced draft fan 11, and the hot air is positioned above a back flushing device 14 in the chimney at the inlet of the chimney 3. The steam in the granulating process and the steam on the surface of the filtering pool continuously act through a steam heat exchanger 12 in the granulating tower 1, a spraying device 16 in the chimney 3, a foam remover 15 and the like, and the steam which is not thoroughly treated is heated and diluted under the action of hot air at a tap hole, so that the steam saturation is greatly reduced, and the complete white removing treatment of the blast furnace granulated slag process steam is realized.
The hot water heated by the steam heat exchanger (about 60-70 ℃) has wide application, can be used for shower bath of a living water system and heating in winter after being introduced into a user pipe network, and can also be used for humidifying and preheating materials of an industrial water system. The steam heat energy in the slag granulating process is effectively recovered, the air discharge of sulfur-containing steam in the granulating process and a filtering tank is reduced, the steam whitening treatment is realized, and the method has great significance for energy conservation and emission reduction.
The application has the following advantages:
the application provides a heat exchange-spraying-defoaming-heating steam treatment measure, which can effectively reduce the discharge of sulfur-containing steam in the blast furnace water slag process, realize the whitening treatment and reduce the air pollution; the steam heat energy of the slag granulating process can be fully returned, so that the effective recycling of energy sources is realized; the application adopts the heat exchanger without energy consumption to realize the heat energy utilization of the steam in the granulating process, and has the advantages of low running cost and high benefit; the application fully utilizes the hot air of the blast furnace tapping hole to perform the whitening treatment of the water slag process, thereby avoiding the waste of heat energy of the tapping hole.
The foregoing description of the embodiments of the application is not intended to limit the scope of the application, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the application shall fall within the scope of the patent. In addition, the technical features and the technical features, the technical features and the technical application can be freely combined for use.
Claims (2)
1. The energy-saving and whitening treatment system for the blast furnace granulated slag process is characterized by comprising a granulating tower (1), a chimney (3), a filter tank (8) and a tap hole cover (10), wherein the granulating tower (1) is connected with the chimney (3) through a granulating tower steam pipeline (20), the granulating tower (1) is connected with the filter tank (8) through a slag-water mixture pipeline (21), the filter tank (8) is connected with the chimney (3) through a filter tank steam pipeline (22), the tap hole cover (10) is positioned at a tap hole of a blast furnace tapping field (9), and the tap hole cover (10) is connected with the chimney (3) through an exhaust pipeline (24);
a granulator (13) and a steam heat exchanger (12) are arranged in the granulating tower (1), the granulator (13) is positioned below a high-temperature slag inlet of the granulating tower (1), the steam heat exchanger (12) is positioned above the granulator (13), and the high-temperature slag inlet of the granulating tower (1) is positioned between the steam heat exchanger (12) and the granulator (13);
a first induced draft fan (2) is arranged on the granulating tower steam pipeline (20), a second induced draft fan (4) is arranged on the filtering tank steam pipeline (22), a third induced draft fan (11) is arranged on the exhaust pipeline (24), and the joint of the granulating tower steam pipeline (20) and the granulating tower (1) is positioned above the steam heat exchanger (12);
a spraying device (16), a foam remover (15) and a back flushing device (14) are sequentially arranged in the chimney (3) from bottom to top, the spraying device (16) comprises long spray guns (17) and short spray guns (18) which are uniformly and alternately arranged along the circumferential direction of the chimney (3), and a plurality of high-pressure spray heads (19) are uniformly arranged on the long spray guns (17) and the short spray guns (18);
the connection part of the filter tank steam pipeline (22) and the chimney (3) is positioned below the spraying device (16), the connection part of the granulating tower steam pipeline (20) and the chimney (3) is also positioned below the spraying device (16), and the connection part of the exhaust pipeline (24) and the chimney (3) is positioned above the back flushing device (14);
the filter tank (8) comprises a first filter sub-tank (81) and a second filter sub-tank (82) which are adjacently arranged in parallel;
the upper parts of the first filtering sub-tank (81) and the second filtering sub-tank (82) are respectively provided with a steam discharge port, the steam discharge ports are connected with a filtering tank steam pipeline (22), and the bottom of the chimney (3) is externally connected with a drainage pipeline (23);
the steam in the granulating tower (1) can be led to a chimney (3) through a first induced draft fan (2);
steam in the filter tank (8) can be led to the chimney (3) through the second induced draft fan (4);
hot air in the tap hole enclosure (10) can be led to the chimney (3) through a third induced draft fan (11).
2. The energy-saving and whitening treatment system for the blast furnace slag process according to claim 1, wherein a movable steam hood (7) is arranged at the top of the filter tank (8), and the movable steam hood (7) can seal the first filter sub-tank (81) or the second filter sub-tank (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811609270.7A CN109457068B (en) | 2018-12-27 | 2018-12-27 | Energy-saving and whitening treatment system for blast furnace granulated slag process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811609270.7A CN109457068B (en) | 2018-12-27 | 2018-12-27 | Energy-saving and whitening treatment system for blast furnace granulated slag process |
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| CN109457068A CN109457068A (en) | 2019-03-12 |
| CN109457068B true CN109457068B (en) | 2023-11-10 |
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| CN110586888A (en) * | 2019-10-16 | 2019-12-20 | 中冶南方连铸技术工程有限责任公司 | Secondary cooling steam white eliminating device for continuous casting |
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| US5540895A (en) * | 1994-06-03 | 1996-07-30 | Paul Wurth S.A. | Device for the treatment of mixture of steam and air contaminated with sulphurous gases, formed during the granulation and dehydration of blast furnace slag |
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| CN103981306A (en) * | 2014-05-25 | 2014-08-13 | 北京首钢国际工程技术有限公司 | Method and device for recycling waste heat in molten slag water quenching and granulating process of ironmaking blast furnace |
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| CN209292377U (en) * | 2018-12-27 | 2019-08-23 | 中冶京诚工程技术有限公司 | A kind of blast furnace granulated slag energy saving technology disappears white processing system |
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| LU91765B1 (en) * | 2010-12-14 | 2012-06-15 | Wurth Paul Sa | Steam condensation tower for a granulation installation |
| LU92235B1 (en) * | 2013-07-01 | 2015-01-02 | Wurth Paul Sa | Steam condensation tower for a granulation installation |
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| US5540895A (en) * | 1994-06-03 | 1996-07-30 | Paul Wurth S.A. | Device for the treatment of mixture of steam and air contaminated with sulphurous gases, formed during the granulation and dehydration of blast furnace slag |
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| CN108754054A (en) * | 2018-08-21 | 2018-11-06 | 北京京诚科林环保科技有限公司 | A kind of dedusting of blast furnace granulated slag granulation tower, be dehydrated, disappear white system |
| CN209292377U (en) * | 2018-12-27 | 2019-08-23 | 中冶京诚工程技术有限公司 | A kind of blast furnace granulated slag energy saving technology disappears white processing system |
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