CN110975499B - Environment-friendly white removing device for granulated slag of blast furnace - Google Patents
Environment-friendly white removing device for granulated slag of blast furnace Download PDFInfo
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- CN110975499B CN110975499B CN201911361050.1A CN201911361050A CN110975499B CN 110975499 B CN110975499 B CN 110975499B CN 201911361050 A CN201911361050 A CN 201911361050A CN 110975499 B CN110975499 B CN 110975499B
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- 239000002893 slag Substances 0.000 title claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 230000002087 whitening effect Effects 0.000 claims abstract description 64
- 239000007921 spray Substances 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 16
- 230000005494 condensation Effects 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 230000001954 sterilising effect Effects 0.000 claims abstract 4
- 239000006260 foam Substances 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011001 backwashing Methods 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 description 31
- 239000011593 sulfur Substances 0.000 description 31
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 30
- 238000005469 granulation Methods 0.000 description 23
- 230000003179 granulation Effects 0.000 description 23
- 238000011010 flushing procedure Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect 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
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 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
- 239000000779 smoke Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010438 heat treatment 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
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
Classifications
-
- 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
-
- 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 an environment-friendly blast furnace slag whitening device, which comprises a granulating and whitening tower (2) and a sterilizing Bai Chi (6), wherein a blast furnace slag inlet (9) and a granulator (1) are arranged at the lower part of the granulating and whitening tower (2), a condensing spray device (4) and a spray water collecting bucket (3) which are arranged up and down are arranged in the granulating and whitening tower (2), a steam outlet (10) and a gas injection port (16) are arranged at the upper part of the granulating and whitening tower (2), a filter layer (7) and a filter pipe (8) are arranged in the sterilizing Bai Chi (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 blast furnace slag environment-friendly whitening device fully utilizes the filter material in the bottom filtering process, and leads small part of steam which is not condensed by the condensation 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 an environment-friendly blast furnace slag whitening device.
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. Slag is usually granulated by a sediment filtration (commonly called bottom filtration) water slag process at home and abroad. Hydraulic slag flushing is carried out in front of a blast furnace, the slag is crushed by water quenching, then the slag is changed into a slag-water mixture (commonly called water slag), the water slag enters a filter tank through a slag flushing ditch, liquid water is filtered by a filter layer in the filter tank and recycled, solid slag particles are left in the filter tank, and then the slag particles are grabbed and loaded and transported outwards through a bridge grab crane.
The slag granulating process produces a large amount of sulfur-containing steam (about 60-100 ℃) in the process of granulating slag, the slag steam is corrosive, pollutes the surrounding environment in the process of dispersing, corrodes surrounding equipment, and meanwhile, the dispersed steam can cause certain corrosion to the blast furnace equipment due to the fact that the filter tank is very close to the blast furnace.
With the increasing severity of environmental protection in China, the more intense the requirements of iron and steel enterprises on steam whitening technology of water slag technology. Related researches have been carried out for many years at home and abroad, and it is hoped to eliminate slag flushing steam and realize steam whitening. For example, chinese patent CN 107815514A, publication date 2018, 3 and 20, discloses a device 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 flue gas of hot blast stove to heat vapor to prevent white smoke. The method can effectively reduce the emission of part of steam, and can prevent white smoke from being generated by heating the steam by using the flue gas of the hot blast stove, but finally, part of steam is discharged into the atmosphere, namely, the real and thorough whitening cannot be realized.
Disclosure of Invention
In order to realize the real and thorough whitening, the invention provides the environment-friendly blast furnace granulated slag whitening device which fully utilizes the filter material in the bottom filtering process, and leads small part of steam which is not condensed by the condensation spraying device to the bottom of the whitening pool in the steam whitening process, thereby realizing the thorough steam whitening treatment, and the filter material is backwashed by steam first and then by water, so that the backwashing efficiency of 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.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a blast furnace grain slag environmental protection device that disappears, includes the granulation and disappears white tower and disappears Bai Chi, and the lower part that the granulation disappears white tower is equipped with blast furnace slag entry and granulator, contains condensation spray set and the shower water collection bucket that sets up from top to bottom in the granulation disappears white tower, and the upper portion that the granulation disappears white tower is equipped with steam outlet and gas injection mouth, disappears and is equipped with filter layer and filter tube in Bai Chi, and steam outlet passes through steam delivery pipeline and is connected with the filter tube, is equipped with demister and steam fan on the steam delivery pipeline in proper order.
The steam outlet, the gas injection port, the condensation spraying device, the spray water collecting bucket, the blast furnace slag inlet and the granulator are sequentially arranged from top to bottom, an air blower is connected to the outside of 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 collecting water pipeline, wherein 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 baffle ring, the lower end of the outer bucket body is connected with the lower end of the inner baffle ring through an annular connecting plate, and an annular water collecting groove is formed between the outer bucket body and the inner baffle ring.
The upper end that the inner tube was fought is higher than the upper end that the urceolus was fought, and the lower extreme that the inner tube was fought flushes with the lower extreme that the urceolus was fought, and the upper and lower both ends that the inner tube was fought are open state, and the upper and lower both ends that the outer body was fought are open state, and collecting water pipe is the horizontality, and the lower extreme that the inner tube was fought and the lower extreme that the urceolus was fought all are connected with collecting water pipe, the inside that the inner tube was fought communicates with collecting water pipe's inside, be equipped with the drainage through-hole in the annular connecting plate, annular water catch bowl is through the inside intercommunication of drainage through-hole and collecting water pipe.
The upper end external diameter of inner tube fill is less than the internal diameter of the white tower that disappears of granulating, and the lower extreme external diameter of inner tube fill is less than the internal diameter of interior fender ring, and the upper end external diameter of outer bucket body equals the internal diameter of the white tower that disappears of granulating, and the lower extreme of outer bucket body flushes with the lower extreme of interior fender ring, and the one end of collecting water pipeline is located the outside of the white tower that disappears of granulating, and the external diameter of collecting water pipeline is less than the internal diameter of interior fender ring.
The side wall of the granulating and whitening tower is provided with a spray water inlet, a collecting water outlet and a steam return port, spray water can be supplied to the condensing and spraying device through the spray water inlet, water collected by the spray water collecting bucket can be discharged through the collecting water outlet, the steam return port is positioned below the spray water collecting bucket, and the steam conveying pipeline is connected with the steam return port through the steam return pipeline.
The condensing spray device comprises at least one layer of high-pressure atomizing nozzles.
The filter pipe is positioned in the filter layer or below the filter layer.
The filter layer contains filter materials with gradually enlarged particle sizes from top to bottom.
The upper end surface of the whitening pool is higher than the upper surface of the filter layer.
1. The invention can fully utilize the condensation spraying device and the filter material in the bottom filtering process to realize thorough steam whitening treatment.
2. The invention can realize the complete recovery of steam in the slag flushing granulation process and realize the recycling of water resources.
3. The invention can improve the backwashing 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 new construction engineering of blast furnaces, but also suitable for environmental protection reconstruction of the existing blast furnace water slag system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a schematic structural view of the blast furnace slag environment-friendly whitening device.
Fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Fig. 3 is a schematic view of the granulation white tower at the spray water collection hopper location.
Fig. 4 is a top view of the outer bucket and the collecting water pipe.
Fig. 5 is a sectional view taken along the direction B-B in fig. 4.
1. A granulator; 2. granulating and whitening tower; 3. a spray water collection bucket; 4. condensing and spraying device; 5. a steam fan; 6. eliminating Bai Chi; 7. a filter layer; 8. a filter tube; 9. a blast furnace slag inlet; 10. a steam outlet; 11. a vapor transfer line; 12. a shower water inlet; 13. a collection water outlet; 14. a demister; 15. an air blower; 16. an air 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 collecting water pipe; 34. an outer bucket body; 35. an inner baffle ring; 36. a drainage through hole; 37. an annular water collection tank; 38. condensed water and spray water; 39. sulfur-containing steam.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The utility model provides a blast furnace grain slag environmental protection device that disappears, including granulation white tower 2 that disappears and remove Bai Chi, the lower part that the granulation disappears white tower 2 is equipped with blast furnace slag entry 9 and granulator 1, contain condensation spray set 4 and spray water collection fill 3 that set up from top to bottom in the granulation white tower 2 that disappears, the upper portion that the granulation disappears white tower 2 is equipped with steam outlet 10 and gas injection mouth 16, be equipped with filter layer 7 and filter tube 8 in the white pond that disappears 6, steam outlet 10 passes through steam delivery pipeline 11 and is connected with filter tube 8, be equipped with demister 14 and steam fan 5 on the steam delivery pipeline 11 in proper order, as shown in figure 1.
The steam outlet 10 is connected with the filter pipe 8 through a steam conveying pipeline 11, and the rest part of sulfur-containing steam which is not condensed is discharged from the steam outlet 10, is defoamed by a defoamer 14 and 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 led into the bottom of the whitening pool. Thus, not only the thorough steam whitening treatment is realized, but also the back flushing is carried out on the filter material by steam and then the back flushing is carried out on the filter material by water, thereby improving the back flushing efficiency of the filter material, improving the activity of the filter material and avoiding the problems of easy hardening and short service life of the filter material.
In this embodiment, the blast furnace slag inlet 9 is vertically arranged in correspondence with the granulator 1, the steam outlet 10, the gas injection port 16, the condensation spraying device 4, the spray water collecting bucket 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 the air blower 15, air can be injected into the upper end of the granulation white tower 2 through the gas injection port 16, and the negative pressure value at the top of the granulation white tower 2 can be adjusted by adjusting the inflow amount of the air.
In this embodiment, the side wall of the granulation and white tower 2 is further provided with a shower water inlet 12, a collecting water outlet 13 and a steam return port 17, and the steam delivery line 11 is connected to the steam return port 17 through a steam return line 18. Air can be injected into the upper end of the granulation white tower 2 through the air injection port 16 and the air blower 15, and the negative pressure value at the top of the granulation white tower 2 can be adjusted by adjusting the injection amount of the air. The shower water can be supplied to the condensation shower 4 through the shower water inlet 12, and the water collected by the shower water collection bucket 3 can be discharged through the collection water outlet 13.
The steam return port 17 is positioned below the spray water collection bucket 3, and the steam in the steam delivery line 11 can be returned to the granulating and whitening tower 2 through the steam return line 18 for re-spray condensation. I.e. the remainder of the sulfur-containing steam can be fed into the filter pipe 8 of the digester 6 or the remainder of the sulfur-containing steam can be fed into the granulation and digestion tower 2, and the steam delivery line 11 and the steam return line 18 are provided with valves 19 for controlling the flow direction of the sulfur-containing steam in the steam delivery line 11.
The spray water collecting bucket 3 may be a product in the prior art, or in the present invention, the spray water collecting bucket 3 includes an inner barrel bucket 31, an outer barrel bucket 32 and a collecting water pipe 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 axis of the inner cylinder bucket 31, the axis of the outer cylinder bucket 32 and the axis of the granulation white tower 2 coincide. The inner barrel bucket 31 is of a conical barrel-shaped structure with the top end facing downwards and the bottom end facing upwards, the outer barrel bucket 32 comprises an outer bucket body 34 and an inner baffle ring 35, the inner baffle ring 35 is sleeved in the lower end of the outer bucket body 34, the axis of the inner baffle ring 35 is coincident with that of the outer bucket body 34, the outer bucket body 34 is of a conical barrel-shaped structure with the top end facing downwards and the bottom end facing upwards, the lower end of the outer bucket body 34 is in sealing connection with the lower end of the inner baffle ring 35 through an annular connecting plate, and an annular water collecting groove 37 is formed between the outer bucket body 34 and the inner baffle ring 35.
The upper end of the inner barrel bucket 31 is higher than the upper end of the outer barrel bucket 32, and the lower end of the inner barrel bucket 31 is flush with the lower end of the outer barrel bucket 32. The upper and lower both ends of inner tube fill 31 are open condition, and the upper and lower both ends of outer bucket body 34 are open condition, and collecting water pipe 33 is the horizontality, and the lower extreme of inner tube fill 31 and the lower extreme of outer tube fill 32 all are connected with collecting water pipe 33, and the inside of inner tube fill 31 communicates with collecting water pipe 33's inside, be equipped with drainage through-hole 36 in the annular connecting plate, annular water catch bowl 37 communicates with collecting water pipe 33's inside through drainage through-hole 36.
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 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 and whitening tower 2, the outer bucket body 34 is fixedly connected with the granulating and whitening tower 2, the lower end of the outer bucket body 34 is flush with the lower end of the inner baffle 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 baffle ring 35 are flush. One end of the collecting water pipe 33 is located outside the granulation white tower 2, the outer diameter of the collecting water pipe 33 is smaller than the inner diameter of the inner baffle ring 35, and one end of the collecting water pipe 33 is the collecting water outlet 13, as shown in fig. 1 to 5.
In use, the sulfur-containing vapor 39 moves upwardly and sequentially through the lower end of the inner baffle ring 35, the annular passage and the annular space, with a majority of the sulfur-containing vapor being condensed water under the influence of the atomizing spray water. The condensed water and a part of the shower water 38 fall into the lower end of the inner drum bucket 31, and then enter the collecting water pipe 33 and are discharged from the collecting water outlet 13. The condensed water and another portion of the shower water 38 fall into the annular water collection sump 37 at the lower end of the outer tub 32 and then enter the collection water pipe 33 and are discharged from the collection water outlet 13 as shown in fig. 3.
In this embodiment, the condensation spray device 4 comprises at least one layer of high pressure atomizing nozzles, and the condensation spray device 4 is capable of spraying cold water to condense the high temperature sulfur-containing steam to form condensed water, which will collect in the collecting area of the spray water collecting bucket 3. The steam outlet 10 is positioned at the top of the granulation and white tower 2, a demister 14 and a steam fan 5 are arranged on a steam conveying pipeline 11, 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 or return to the granulation and white tower 2 through the steam conveying pipeline 11.
In this embodiment, the wall of the filtering tube 8 is provided with a plurality of filtering through holes, and the residual sulfur-containing steam can enter the filtering layer 7 after entering the filtering tube 8 and passing through the filtering through holes, 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 the particle sizes gradually becoming larger from top to bottom.
The working process of the environment-friendly blast furnace granulated slag whitening device is described below.
High temperature slag (1350 ℃ -1500 ℃) enters the granulating and whitening tower 2 from a blast furnace slag inlet 9, a large amount of high-speed granulating water (about 40 ℃ -45 ℃) is sprayed out of the granulator 1 into the granulating and whitening tower 2, the high temperature slag completes granulation 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.
Slag flushing water enters the granulating and whitening tower 2 from a slag flushing water inlet at the lower part of the granulating and whitening tower 2, and the slag water mixture is flushed out of the granulating and whitening tower 2 from a slag flushing outlet at the lower part of the granulating and whitening tower 2. The sulfur-containing steam moves upwards inside the granulation white tower 2 under the action of the steam fan 5.
The condensation spraying device 4 sprays spray water (about 40-45 ℃) to form an atomization 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. The sulfur-containing steam upwards passes through the spray water collecting bucket 3 and enters an atomized water area, most of the sulfur-containing steam becomes condensed water under the action of atomized spray water, and the condensed water and the spray water fall into the spray water collecting bucket 3 below the condensation spray device 4. The water collected by the shower water collecting bucket 3 (i.e., the condensed water and the shower water described above) is discharged from the collecting water outlet 13 to the granulating and whitening tower 2, and then can be sent to a cooling tower.
The steam blower 5 introduces the sulfur-containing steam which is not condensed by the atomized spray water into the steam delivery pipeline 11, the rest of the sulfur-containing steam enters the demister 14 for demisting, air can be injected into the upper end of the granulating 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 granulating tower can be adjusted by adjusting the inflow amount of the air.
The rest of the sulfur-containing steam subjected to the defoaming treatment enters the filter tube 8 through the steam conveying line 11, or the rest of the sulfur-containing steam subjected to the defoaming treatment enters the lower part of the granulation white 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 whitening pool 6, the residual sulfur-containing steam upwards moves to back flush the filter material of the filter layer 7, the whitening pool 6 contains deposited water, the water surface of the deposited water is usually positioned between the upper surface of the filter layer 7 and the upper end surface of the whitening pool 6, and after the residual sulfur-containing steam is discharged from the filter through hole of the filter pipe 8 and enters the whitening pool 6, the deposited water fully absorbs the residual sulfur-containing steam, so that the truly and thoroughly whitening is realized.
The method for whitening the blast furnace slag by the bottom filtering method adopts the environment-friendly blast furnace water slag whitening device, and comprises the following steps of:
step 1: the high temperature slag (1350 ℃ -1500 ℃) and the granulating water (about 40 ℃ -45 ℃) meet 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 from 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;
step 3: the rest part of the sulfur-containing steam enters a demister 14 for demisting;
step 4: the rest part of the sulfur-containing steam enters a filter pipe 8 of a whitening pool 6 (the whitening pool 6 contains deposited water) or the rest part of the sulfur-containing steam enters the lower part of the granulating and whitening tower 2;
step 5: the remainder of this sulfur-containing vapor is discharged from the filter tube 8 and passed upward into the filter layer 7 of the digester 6.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical characteristics, the technical characteristics and technical scheme and the technical scheme can be freely combined for use.
Claims (6)
1. The environment-friendly blast furnace water slag whitening device is characterized by comprising a granulating and whitening tower (2) and a sterilizing Bai Chi (6), wherein a blast furnace slag inlet (9) and a granulator (1) are arranged at the lower part of the granulating and whitening tower (2), a condensing spray device (4) and a spray water collecting bucket (3) which are arranged up and down are arranged in the granulating and whitening tower (2), a steam outlet (10) and a gas injection port (16) are arranged at the upper part of the granulating and whitening tower (2), a filter layer (7) and a filter pipe (8) are arranged in the sterilizing Bai Chi (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 condensing spray device (4) comprises at least one layer of high-pressure atomizing nozzles;
the filter pipe (8) is positioned in the filter layer (7) or below the filter layer (7);
the filter layer (7) contains filter materials with the particle sizes gradually becoming larger from top to bottom;
the upper end surface of the eliminator Bai Chi (6) is higher than the upper surface of the filter layer (7).
2. The blast furnace slag environment-friendly and whitening device according to claim 1, wherein a steam outlet (10), a gas injection port (16), a condensation spraying device (4), a spray water collecting bucket (3), a blast furnace slag inlet (9) and the granulator (1) are sequentially arranged from top to bottom, an air blower (15) is connected to the outside of the gas injection port (16), and air can be injected into the upper end of the granulating and whitening tower (2) through the gas injection port (16).
3. The blast furnace slag environment-friendly whitening device according to claim 1, wherein the spray water collecting bucket (3) comprises an inner barrel bucket (31), an outer barrel bucket (32) and a collecting water pipeline (33), the inner barrel bucket (31) is sleeved in the outer barrel bucket (32), an annular channel is formed between the inner barrel bucket (31) and the outer barrel bucket (32), the outer barrel bucket (32) comprises an outer bucket body (34) and an inner baffle ring (35), the lower end of the outer bucket body (34) is connected with the lower end of the inner baffle ring (35) through an annular connecting plate, and an annular water collecting tank (37) is formed between the outer bucket body (34) and the inner baffle ring (35).
4. The blast furnace slag environment-friendly white removing device 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), the upper end and the lower end of the inner barrel bucket (31) are both in an open state, the upper end and the lower end of the outer bucket body (34) are both in an open state, the collecting water pipe (33) is in a horizontal state, the lower end of the inner barrel bucket (31) and the lower end of the outer barrel bucket (32) are both connected with the collecting water pipe (33), the inside of the inner barrel bucket (31) is communicated with the inside of the collecting water pipe (33), a drainage through hole (36) is arranged in the annular connecting plate, and the annular water collecting tank (37) is communicated with the inside of the collecting water pipe (33) through the drainage through hole (36).
5. The blast furnace slag environment-friendly and whitening device 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 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 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 and whitening 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 collecting water pipeline (33) is positioned outside the granulating and whitening tower (2), and the outer diameter of the collecting water pipeline (33) is smaller than the inner diameter of the inner baffle ring (35).
6. The blast furnace slag-water environment-friendly white removing device according to claim 1, wherein a spray water inlet (12), a collecting water outlet (13) and a steam return port (17) are arranged on the side wall of the granulating white removing 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 collecting water outlet (13), the steam return port (17) is positioned below the spray water collecting hopper (3), and the steam conveying pipeline (11) is connected with the steam return port (17) through a steam return pipeline (18).
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| CN1393568A (en) * | 2001-07-03 | 2003-01-29 | 昆明钢铁集团有限责任公司炼铁厂 | Method for using air or water to reversely flush grain slag filter of blast furnace |
| WO2013168655A1 (en) * | 2012-05-07 | 2013-11-14 | 新日鉄住金エンジニアリング株式会社 | Slag heat recovery device |
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| CN208632574U (en) * | 2018-07-19 | 2019-03-22 | 苏州仕净环保科技股份有限公司 | A kind of blast furnace slag quenching water disappears white device |
| CN209292374U (en) * | 2018-12-27 | 2019-08-23 | 中冶京诚工程技术有限公司 | A kind of granulated energy conservation of blast furnace cinder disappears white system |
| 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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| CN1393568A (en) * | 2001-07-03 | 2003-01-29 | 昆明钢铁集团有限责任公司炼铁厂 | Method for using air or water to reversely flush grain slag filter of blast furnace |
| WO2013168655A1 (en) * | 2012-05-07 | 2013-11-14 | 新日鉄住金エンジニアリング株式会社 | Slag heat recovery device |
| CN208632574U (en) * | 2018-07-19 | 2019-03-22 | 苏州仕净环保科技股份有限公司 | A kind of blast furnace slag quenching water disappears white device |
| CN109457070A (en) * | 2018-12-27 | 2019-03-12 | 中冶京诚工程技术有限公司 | A kind of blast furnace granulated slag process steam disappears bletilla heat reclaiming system |
| CN209292374U (en) * | 2018-12-27 | 2019-08-23 | 中冶京诚工程技术有限公司 | A kind of granulated energy conservation of blast furnace cinder disappears white system |
| 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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