CN110975499A - Environment-friendly white-removing device for blast furnace granulated slag - Google Patents
Environment-friendly white-removing device for blast furnace granulated slag Download PDFInfo
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- CN110975499A CN110975499A CN201911361050.1A CN201911361050A CN110975499A CN 110975499 A CN110975499 A CN 110975499A CN 201911361050 A CN201911361050 A CN 201911361050A CN 110975499 A CN110975499 A CN 110975499A
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- 239000002893 slag Substances 0.000 title claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000007921 spray Substances 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000009833 condensation Methods 0.000 claims abstract description 19
- 230000005494 condensation Effects 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 239000006260 foam Substances 0.000 claims abstract description 3
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 4
- 230000002087 whitening effect Effects 0.000 abstract description 40
- 238000001914 filtration Methods 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 13
- 238000011001 backwashing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 32
- 229910052717 sulfur Inorganic materials 0.000 description 30
- 239000011593 sulfur Substances 0.000 description 30
- 241000276489 Merlangius merlangus Species 0.000 description 11
- 238000004061 bleaching Methods 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 8
- 238000003379 elimination reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 230000008030 elimination Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a blast furnace granulated slag environment-friendly whitening device which comprises a granulating whitening tower (2) and a whitening pool (6), wherein a blast furnace molten slag inlet (9) and a granulator (1) are arranged at the lower part of the granulating whitening tower (2), a condensation spray device (4) and a spray water collecting hopper (3) which are arranged up and down are arranged in the granulating whitening tower (2), a steam outlet (10) and an air injection port (16) are arranged at the upper part of the granulating whitening tower (2), a filter layer (7) and a filter pipe (8) are arranged in the whitening pool (6), the steam outlet (10) is connected with the filter pipe (8) through a steam conveying pipeline (11), and a foam remover (14) and a steam fan (5) are sequentially arranged on the steam conveying pipeline (11). The environment-friendly blast furnace slag whitening device makes full use of the filter material in the bottom filtration process, and leads a small part of steam which is not condensed by the condensing and spraying device to the bottom of the whitening pool in the steam whitening process, so that the backwashing efficiency of the filter material can be improved, and the activity of the filter material can be improved.
Description
Technical Field
The invention relates to the field of metal smelting equipment, in particular to a blast furnace granulated slag environment-friendly whitening device.
Background
High-temperature liquid slag (1350 ℃ -1500 ℃) is generated during blast furnace smelting, 7 hundred million tons of molten iron are produced in China every year, and 2.5 million tons of high-temperature liquid slag are generated. The slag is usually granulated at home and abroad by a precipitation filtration method (often called bottom filtration method) and a granulating process. The method comprises the steps of carrying out hydraulic slag flushing in front of a blast furnace, crushing slag by water quenching to obtain a slag-water mixture (often called water slag), enabling water slag to enter a filter tank through a slag flushing channel, filtering liquid water by a filter layer in the filter tank for recycling, leaving solid slag particles in the filter tank, and then grabbing, loading and transporting the slag particles by a bridge type grab crane.
The granulated slag process can generate a large amount of sulfur-containing steam (about 60-100 ℃) in the process of granulating the molten slag, the granulated slag steam has corrosiveness, the surrounding environment is polluted in the emission process, surrounding equipment is corroded, and meanwhile, the emitted steam can also corrode the blast furnace equipment to a certain extent due to the fact that the distance between the filter tank and the blast furnace is very close.
With the increasing environmental protection situation in China, the demand of iron and steel enterprises for the steam whitening technology of the water granulated slag process is more and more strong. Related research has been carried out for many years at home and abroad, and slag flushing steam is hopefully eliminated to realize steam whitening. For example, chinese patent CN 107815514 a, published as 2018, 3 and 20, discloses an apparatus and a method for recovering slag flushing water vapor and eliminating white fog, which first adopts a spray cooling mode to realize vapor recovery, and then utilizes hot blast furnace flue gas to heat steam to prevent white smoke generation. The method can effectively reduce partial steam emission, and the generation of white smoke can be prevented by utilizing the temperature-rising steam of the flue gas of the hot blast stove, but partial steam is finally discharged into the atmosphere, namely, the real and thorough white elimination can not be realized.
Disclosure of Invention
In order to realize real and thorough white elimination, the invention provides the blast furnace water granulated slag environment-friendly white elimination device, which makes full use of the filter material in the bottom filtration process, leads a small part of steam which is not condensed by the condensation spray device to the bottom of the white elimination pool in the steam white elimination process, not only realizes thorough steam white elimination treatment, but also firstly uses the steam to carry out back washing on the filter material and then uses water to carry out back washing on the filter material, can improve the back washing efficiency of the filter material, improve the activity of the filter material, and avoid the problems of easy hardening and short service life of the filter material.
The technical scheme adopted by the invention for solving the technical problems is as follows: the environment-friendly blast furnace slag whiting device comprises a granulating whiting tower and a whiting pool, wherein a blast furnace slag inlet and a granulator are arranged at the lower part of the granulating whiting tower, a condensation spray device and a spray water collecting hopper which are arranged up and down are arranged in the granulating whiting tower, a steam outlet and an air injection port are arranged at the upper part of the granulating whiting tower, a filter layer and a filter pipe are arranged in the whiting pool, the steam outlet is connected with the filter pipe through a steam conveying pipeline, and a foam remover and a steam fan are sequentially arranged on the steam conveying pipeline.
The steam outlet, the gas injection port, the condensation spraying device, the spray water collecting hopper, the blast furnace slag inlet and the granulator are sequentially arranged from top to bottom, the air fan is connected outside the gas injection port, and air can be injected into the upper end of the granulating and whitening tower through the gas injection port.
The spray water collecting bucket comprises an inner bucket, an outer bucket and a water collecting pipeline, the inner bucket is sleeved in the outer bucket, an annular channel is formed between the inner bucket and the outer bucket, the outer bucket comprises an outer bucket body and an inner retaining ring, the lower end of the outer bucket body is connected with the lower end of the inner retaining ring through an annular connecting plate, and an annular water collecting tank is formed between the outer bucket body and the inner retaining ring.
The upper end that the inner drum was fought is higher than the upper end that the urceolus was fought, and the lower extreme that the inner drum was fought flushes with the lower extreme that the urceolus was fought, and the upper and lower both ends that the inner drum was fought are open state, and the collection water pipeline is the horizontality, and the lower extreme that the inner drum was fought and the lower extreme that the urceolus was fought all with collect the water pipe and be connected, the inside of inner drum fill and the inside intercommunication of collecting the water pipe, be equipped with drainage through hole in the annular connecting plate, annular water catch bowl passes.
The outer diameter of the upper end of the inner barrel bucket is smaller than the inner diameter of the granulating and whitening tower, the outer diameter of the lower end of the inner barrel bucket is smaller than the inner diameter of the inner baffle ring, the outer diameter of the upper end of the outer bucket body is equal to the inner diameter of the granulating and whitening tower, the lower end of the outer bucket body is flush with the lower end of the inner baffle ring, one end of the water collecting pipeline is positioned outside the granulating and whitening tower, and the outer diameter of the water collecting pipeline is smaller than the inner diameter of the inner baffle ring.
Be equipped with spray water entry, collection water export and steam return opening on the lateral wall of pelletization white tower, can supply spray water to condensation spray set through spray water entry, can collect the log raft play that the fill was collected with spray water through collecting the water export, steam return opening is located spray water and collects the below of fighting, and steam conveying pipeline returns the pipeline and is connected with steam return opening through steam.
The condensation spraying device comprises at least one layer of high-pressure atomizing nozzle.
The filter pipe is positioned in or below the filter layer.
The filter layer contains a filter material with the particle size gradually increasing from top to bottom.
The upper end surface of the white water eliminating pool is higher than the upper surface of the filter layer.
1. The invention can fully utilize the condensing spray device and the filter material in the bottom filtering process to realize thorough steam white elimination treatment.
2. The invention can realize the complete recovery of the steam in the slag flushing and granulating process and realize the recycling of water resources.
3. The invention can improve the back washing efficiency of the filter material, improve the activity of the filter material and avoid the problems of easy hardening and short service life of the filter material.
4. The invention is not only suitable for the new construction project of the blast furnace, but also suitable for the environmental protection reconstruction of the existing blast furnace water slag system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of the environment-friendly white-eliminating device for the blast furnace granulated slag.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fig. 3 is a schematic view of a granulated absorption tower at the location of a spray water collection hopper.
FIG. 4 is a top view of the outer bucket body and water collection pipe.
Fig. 5 is a sectional view taken along the direction B-B in fig. 4.
1. A granulator; 2. granulating and eliminating the white tower; 3. a spray water collecting hopper; 4. a condensation spraying device; 5. a steam fan; 6. a white water removal pool; 7. a filter layer; 8. a filter tube; 9. a blast furnace slag inlet; 10. a steam outlet; 11. a vapor delivery line; 12. a spray water inlet; 13. a collected water outlet; 14. a demister; 15. an air blower; 16. a gas injection port; 17. a steam return port; 18. a vapor return line; 19. a valve;
31. an inner barrel bucket; 32. an outer barrel bucket; 33. a water collection pipeline; 34. an outer bucket body; 35. an inner baffle ring; 36. a drain through hole; 37. an annular water collection tank; 38. condensed water and spray water; 39. a sulfur-containing vapor.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The environment-friendly blast furnace granulated slag white-eliminating device comprises a granulating white-eliminating tower 2 and a white-eliminating pool 6, wherein the lower part of the granulating white-eliminating tower 2 is provided with a blast furnace molten slag inlet 9 and a granulator 1, the granulating white-eliminating tower 2 is internally provided with a condensation spray device 4 and a spray water collecting hopper 3 which are arranged up and down, the upper part of the granulating white-eliminating tower 2 is provided with a steam outlet 10 and an air injection port 16, the white-eliminating pool 6 is internally provided with a filter layer 7 and a filter pipe 8, the steam outlet 10 is connected with the filter pipe 8 through a steam conveying pipeline 11, and the steam conveying pipeline 11 is sequentially provided with a demister 14 and a steam fan 5, as shown in figure 1.
The steam outlet 10 is connected with the filter pipe 8 through a steam conveying pipeline 11, and the residual sulfur-containing steam which is not condensed is discharged from the steam outlet 10, defoamed by a demister 14 and then enters the filter pipe 8 through the steam conveying pipeline 11, namely, a small part of steam which is not condensed by the condensation spraying device is introduced into the bottom of the bleaching tank. Therefore, not only is the thorough steam whitening treatment realized, but also the backwashing on the filter material is carried out by using the steam firstly and then the backwashing on the filter material is carried out by using the water, so that the backwashing efficiency on the filter material can be improved, the activity of the filter material is improved, and the problems of easy hardening and short service life of the filter material are avoided.
In this embodiment, the blast furnace slag inlet 9 and the granulator 1 are arranged in a vertically corresponding manner, the steam outlet 10, the gas injection port 16, the condensation spray device 4, the spray water collecting hopper 3, the blast furnace slag inlet 9 and the granulator 1 are sequentially arranged from top to bottom, the gas injection port 16 is externally connected with an air fan 15, air can be injected into the upper end of the granulation and whitening tower 2 through the gas injection port 16, and the negative pressure value at the top of the granulation and whitening tower 2 can be adjusted by adjusting the inflow of the air.
In this embodiment, the side wall of the granulation and white-light-eliminating tower 2 is further provided with a spray water inlet 12, a collected water outlet 13 and a steam return port 17, and the steam delivery pipeline 11 is connected with the steam return port 17 through a steam return pipeline 18. Air can be injected into the upper end of the granulated whitening tower 2 through the air injection port 16 and the air blower 15, and the negative pressure value at the top of the granulated whitening tower 2 can be adjusted by adjusting the injection amount of the air. The condensation shower 4 can be supplied with shower water through the shower water inlet 12, and the water collected by the shower water collection funnel 3 can be discharged through the collection water outlet 13.
The steam return port 17 is positioned below the spray water collecting hopper 3, and the steam in the steam conveying pipeline 11 can be returned to the granulating and whitening tower 2 through the steam return pipeline 18 for re-spraying and condensation. Namely, the rest part of the sulfur-containing steam can enter the filtering pipe 8 of the blank-eliminating pool 6, or the rest part of the sulfur-containing steam can enter the granulating and blank-eliminating tower 2, and valves 19 are arranged on the steam conveying pipeline 11 and the steam return pipeline 18 so as to control the flow direction of the sulfur-containing steam in the steam conveying pipeline 11.
The spray water collecting bucket 3 can be a product in the prior art, or in the invention, the spray water collecting bucket 3 comprises an inner barrel bucket 31, an outer barrel bucket 32 and a water collecting pipeline 33, the inner barrel bucket 31 is sleeved in the outer barrel bucket 32, and an annular channel is formed between the inner barrel bucket 31 and the outer barrel bucket 32. The axial line of the inner barrel bucket 31, the axial line of the outer barrel bucket 32 and the axial line of the granulating and whitening tower 2 are coincident. Interior barrel fill 31 is the circular cone tubular structure of top end down bottom end up, and outer barrel fill 32 contains outer bucket body 34 and interior fender ring 35, and in the lower extreme of outer bucket body 34 was located to interior fender ring 35 cover, the axis of interior fender ring 35 and the coincidence of the axis of outer bucket body 34, outer bucket body 34 is the circular cone tubular structure of top end bottom end up down, through annular connecting plate sealing connection between the lower extreme of outer bucket body 34 and the lower extreme of interior fender ring 35, forms annular water catch bowl 37 between outer bucket body 34 and the interior fender ring 35.
The upper end of the inner bucket 31 is higher than the upper end of the outer bucket 32, and the lower end of the inner bucket 31 is flush with the lower end of the outer bucket 32. The upper and lower both ends of inner barrel fill 31 are open state, and the upper and lower both ends of outer bucket body 34 are open state, and collection water pipe way 33 is horizontal state, and the lower extreme that inner barrel was fought 31 and the lower extreme that outer barrel was fought 32 all are connected with collection water pipe way 33, and the inside of inner barrel fill 31 and the inside intercommunication of collecting water pipe way 33, be equipped with drainage through hole 36 in the annular connecting plate, annular water catch bowl 37 passes through drainage through hole 36 and the inside intercommunication of collecting water pipe way 33.
The outer diameter of the upper end of the inner barrel bucket 31 is smaller than the inner diameter of the granulating and whitening tower 2, and an annular space is formed between the upper end of the inner barrel bucket 31 and the inner surface of the granulating and whitening tower 2. The outer diameter of the lower end of the inner barrel bucket 31 is smaller than the inner diameter of the inner retaining ring 35, the outer diameter of the upper end of the outer bucket body 34 is equal to the inner diameter of the granulating and whitening tower 2, the outer bucket body 34 is fixedly connected with the granulating and whitening tower 2, and the lower end of the outer bucket body 34 is flush with the lower end of the inner retaining ring 35, namely the lower end of the inner barrel bucket 31, the lower end of the outer bucket body 34 and the lower end of the inner retaining ring 35 are flush. One end of the water collecting pipeline 33 is positioned outside the granulating and whitening tower 2, the outer diameter of the water collecting pipeline 33 is smaller than the inner diameter of the inner baffle ring 35, and one end of the water collecting pipeline 33 is a water collecting outlet 13, as shown in fig. 1 to 5.
During use, the sulfur-containing steam 39 moves upward and sequentially passes through the lower end of the inner baffle ring 35, the annular channel and the annular space, and most of the sulfur-containing steam becomes condensed water under the action of atomized spray water. The condensed water and a part of the shower water 38 fall into the lower end of the inner bucket 31, then enter the collected water pipe 33 and are discharged from the collected water outlet 13. The condensed water and another portion of the shower water 38 fall into an annular water collection trough 37 at the lower end of the outer bucket 32, then enter the collection water conduit 33 and are discharged from the collection water outlet 13, as shown in fig. 3.
In this embodiment, the condensation spraying device 4 comprises at least one layer of high-pressure atomizing nozzles, and the condensation spraying device 4 can spray cold water to condense high-temperature sulfur-containing vapor to form condensed water, which will be collected in the collecting area of the spray water collecting hopper 3. The steam outlet 10 is positioned at the top of the granulation and whitening tower 2, the steam conveying pipeline 11 is provided with a demister 14 and a steam fan 5, and the steam fan 5 is used for enabling residual sulfur-containing steam discharged from the steam outlet 10 to enter the filter pipe 8 through the steam conveying pipeline 11 or return the residual sulfur-containing steam to the granulation and whitening tower 2.
In this embodiment, the wall of the filtering pipe 8 has a plurality of filtering through holes, and the residual sulfur-containing vapor enters the filtering pipe 8 and then passes through the filtering through holes to enter the filtering layer 7, as shown in fig. 2. The structure of the whitening tank 6 is basically the same as that of the existing filtering tank, the filtering pipe 8 is positioned in the filtering layer 7 or below the filtering layer 7, preferably, the filtering pipe 8 is positioned at the lower part of the filtering layer 7, and the filtering layer 7 contains filtering materials with gradually-increased grain sizes from top to bottom.
The working process of the blast furnace granulated slag environment-friendly whitening device is described below.
High-temperature molten slag (1350-1500 ℃) enters the granulating and whitening tower 2 from a blast furnace molten slag inlet 9, a large amount of high-speed granulating water (about 40-45 ℃) is sprayed out from the granulator 1 to enter the granulating and whitening tower 2, the high-temperature molten slag is granulated under the action of the granulating water, and a slag-water mixture and a large amount of sulfur-containing steam (about 80-100 ℃) are formed.
The slag flushing water enters the granulating and whiting tower 2 from a slag flushing water inlet at the lower part of the granulating and whiting tower 2, and the slag water mixture is flushed out of the granulating and whiting tower 2 from a slag flushing water outlet at the lower part of the granulating and whiting tower 2. The sulfur-containing steam moves upward inside the granulating and whitening tower 2 by the action of the steam blower 5.
The condensation spray device 4 sprays spray water (about 40-45 ℃) to form an atomized state in the granulating and whitening tower 2, and the atomized spray water is uniformly distributed in the inner space of the granulating and whitening tower 2. This contain sulphur steam upwards passes spray water and collects 3 entering atomized water regions of fighting, and most contain sulphur steam becomes the comdenstion water under atomized spray water's effect, and this comdenstion water falls into spray water collection of condensation spray set 4 below with spray water and fights 3 together. The water collected by the spray water collecting hopper 3 (i.e., the above-mentioned condensed water and spray water) is discharged from the collected water outlet 13 out of the granulated absorption tower 2 and then may be sent to a cooling tower.
The steam blower 5 introduces the residual part of the sulfur-containing steam which is not condensed by the atomized shower water into the steam delivery line 11, the residual part of the sulfur-containing steam enters the demister 14 for defoaming, air can be injected into the upper end of the granulation and whitening tower 2 through the air injection port 16 and the air blower 15, and the negative pressure value at the top of the granulation tower can be adjusted by adjusting the inflow amount of the air.
The rest of the defoamed sulfur-containing steam enters the filter pipe 8 through the steam conveying line 11, or the rest of the defoamed sulfur-containing steam enters the lower part of the granulation and whitening tower 2 through the steam conveying line 11 and the steam return line 18 in sequence.
The residual sulfur-containing steam entering the filter pipe 8 is discharged from the filter through hole of the filter pipe 8 and upwards enters the filter layer 7 of the bleaching tank 6, the residual sulfur-containing steam moves upwards to back flush the filter material of the filter layer 7, the bleaching tank 6 contains deposition water, the water level of the deposition water is generally located between the upper surface of the filter layer 7 and the upper end surface of the bleaching tank 6, and after the residual sulfur-containing steam is discharged from the filter through hole of the filter pipe 8 and enters the bleaching tank 6, the deposition water completely absorbs the residual sulfur-containing steam, so that the true thorough bleaching is realized.
The method for eliminating the white slag by the blast furnace slag bottom filtration method adopts the environment-friendly white slag eliminating device for the blast furnace granulated slag, and comprises the following steps:
step 1: the high-temperature slag (1350-1500 ℃) meets granulating water (about 40-45 ℃) to generate slag-water mixture and a large amount of sulfur-containing steam (about 80-100 ℃);
step 2: the sulfur-containing steam moves upwards, spray water (about 40-45 ℃) is sprayed out of the condensation spraying device 4 to spray the sulfur-containing steam, and most of the sulfur-containing steam becomes condensed water under the action of the spray water;
and step 3: the remaining portion of the sulfur-containing vapor enters a demister 14 for defoaming;
and 4, step 4: the rest part of the sulfur-containing steam enters a filter pipe 8 of a bleaching pool 6 (the bleaching pool 6 contains deposition water) or the rest part of the sulfur-containing steam enters the lower part of a granulating bleaching tower 2;
and 5: the remainder of the sulfur-containing vapor exits the filter tubes 8 and passes upward into the filter layer 7 of the blank space 6.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (10)
1. The environment-friendly white slag eliminating device for the blast furnace is characterized by comprising a granulating white-eliminating tower (2) and a white-eliminating pool (6), wherein a blast-furnace slag inlet (9) and a granulator (1) are arranged at the lower part of the granulating white-eliminating tower (2), a condensing spray device (4) and a spray water collecting hopper (3) which are arranged up and down are arranged in the granulating white-eliminating tower (2), a steam outlet (10) and a gas injection port (16) are arranged at the upper part of the granulating white-eliminating tower (2), a filter layer (7) and a filter pipe (8) are arranged in the white-eliminating pool (6), the steam outlet (10) is connected with the filter pipe (8) through a steam conveying pipeline (11), and a foam remover (14) and a steam fan (5) are sequentially arranged on the steam conveying pipeline (11).
2. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 1, wherein the steam outlet (10), the gas injection port (16), the condensation spraying device (4), the spray water collecting hopper (3), the blast furnace molten slag inlet (9) and the granulator (1) are sequentially arranged from top to bottom, an air fan (15) is connected outside the gas injection port (16), and air can be injected into the upper end of the granulation white-eliminating tower (2) through the gas injection port (16).
3. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 1, wherein the spray water collecting hopper (3) comprises an inner barrel hopper (31), an outer barrel hopper (32) and a water collecting pipeline (33), the inner barrel hopper (31) is sleeved in the outer barrel hopper (32), an annular channel is formed between the inner barrel hopper (31) and the outer barrel hopper (32), the outer barrel hopper (32) comprises an outer hopper body (34) and an inner retaining ring (35), the lower end of the outer hopper body (34) is connected with the lower end of the inner retaining ring (35) through an annular connecting plate, and an annular water collecting tank (37) is formed between the outer hopper body (34) and the inner retaining ring (35).
4. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 3, wherein the upper end of the inner barrel bucket (31) is higher than the upper end of the outer barrel bucket (32), the lower end of the inner barrel bucket (31) is flush with the lower end of the outer barrel bucket (32), both the upper end and the lower end of the inner barrel bucket (31) are in an open state, both the upper end and the lower end of the outer barrel bucket (34) are in an open state, the water collecting pipeline (33) is in a horizontal state, both the lower end of the inner barrel bucket (31) and the lower end of the outer barrel bucket (32) are connected with the water collecting pipeline (33), the interior of the inner barrel bucket (31) is communicated with the interior of the water collecting pipeline (33), the annular connecting plate is internally provided with a water drainage through hole (36), and the annular water collecting tank (37) is communicated with the interior of the water collecting pipeline (33.
5. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 4, wherein the outer diameter of the upper end of the inner barrel bucket (31) is smaller than the inner diameter of the granulating white-eliminating tower (2), the outer diameter of the lower end of the inner barrel bucket (31) is smaller than the inner diameter of the inner baffle ring (35), the outer diameter of the upper end of the outer bucket body (34) is equal to the inner diameter of the granulating white-eliminating tower (2), the lower end of the outer bucket body (34) is flush with the lower end of the inner baffle ring (35), one end of the water collecting pipeline (33) is positioned outside the granulating white-eliminating tower (2), and the outer diameter of the water collecting pipeline (33) is smaller than the inner diameter of the inner baffle ring (35).
6. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 1, wherein a spray water inlet (12), a collected water outlet (13) and a steam return port (17) are arranged on the side wall of the granulating white-eliminating tower (2), spray water can be supplied to the condensing spray device (4) through the spray water inlet (12), water collected by the spray water collecting hopper (3) can be discharged through the collected water outlet (13), the steam return port (17) is positioned below the spray water collecting hopper (3), and the steam delivery pipeline (11) is connected with the steam return port (17) through the steam return pipeline (18).
7. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 1, wherein the condensation spraying device (4) comprises at least one layer of high-pressure atomizing nozzles.
8. The environment-friendly white-eliminating device for blast furnace granulated slag according to claim 1, wherein the filter pipe (8) is positioned in the filter layer (7) or below the filter layer (7).
9. The environment-friendly white-eliminating device for blast furnace granulated slag as claimed in claim 1, wherein the filter layer (7) comprises a filter material with gradually increasing particle size from top to bottom.
10. The environment-friendly white-eliminating device for the blast furnace granulated slag according to claim 1, wherein the upper end surface of the white-eliminating pool (6) is higher than the upper surface of the filter layer (7).
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| CN211585861U (en) * | 2019-12-25 | 2020-09-29 | 中冶京诚工程技术有限公司 | Environment-friendly white-removing device for blast furnace granulated slag |
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