CN214735859U - Fluidized slag cooling device for sensible heat recovery of blast furnace slag - Google Patents
Fluidized slag cooling device for sensible heat recovery of blast furnace slag Download PDFInfo
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- CN214735859U CN214735859U CN202020844355.XU CN202020844355U CN214735859U CN 214735859 U CN214735859 U CN 214735859U CN 202020844355 U CN202020844355 U CN 202020844355U CN 214735859 U CN214735859 U CN 214735859U
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- slag
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- blast furnace
- fluidized
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- 239000002893 slag Substances 0.000 title claims abstract description 148
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 238000005243 fluidization Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 21
- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 210000004127 vitreous body Anatomy 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007908 dry granulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
A fluidized slag cooling device for sensible heat recovery of blast furnace slag comprises a slag cooling device shell, a slag cooler main body, a fluidized fan, a high-temperature flue gas outlet and a blast furnace slag stream inlet; the slag cooler main body is arranged inside the slag cooler shell, and the slag cooler shell is provided with a high-temperature flue gas outlet and a blast furnace slag stream inlet which are communicated with the inside of the slag cooler main body; the fluidization fan is arranged at the inner bottom of the slag cooling device shell, and an outlet of the fluidization fan is communicated with the bottom of the slag cooling device main body. The sensible heat of the slag flow is absorbed by the water cooling walls around the slag cooling device, and the water in the water cooling wall tubes is changed into saturated steam. Fluidized air at the bottom of the fluidized cold slag container exchanges heat with slag particles in a convection mode, and the exchanged heat enters each heating surface of the waste heat boiler through the flue so as to exchange heat out of the flue gas for utilization. Finally, the superheated steam is generated for power generation, and the generated power can be sold in a grid-connected mode.
Description
Technical Field
The utility model belongs to the technical field of blast furnace slag recovery, in particular to a blast furnace slag sensible heat recovery fluidization cold slag device.
Background
Blast furnace slag is a high-quality waste heat resource in steel plants, has high heat content and has huge yield of blast furnace slag every year. At present, almost most of blast furnace ironmaking worldwide uses a slag water quenching process, the process scheme can not fully recover high-temperature heat energy in blast furnace slag, waste of water resources is caused, and meanwhile, environmental pollution is caused. Therefore, the dry granulation technology for blast furnace slag was widely focused and vigorously developed by iron and steel manufacturers and related research institutions all over the world from the beginning of the late 70 s of the 20 th century. Among them, a method of dispersing blast furnace slag put therein into slag using a rotating disk rotating at a high speed, which is called a centrifugal granulation method, is mainstream. The method is characterized in that blast furnace slag is thrown away from the edge of the turntable through the action of centrifugal force, so that the blast furnace slag is mechanically granulated. Beginning in the later 90 s of the 20 th century, the method has been subjected to a large number of tests in laboratories of domestic steel manufacturers and institutions of related research and scientific research institutions, some of which have been subjected to pilot-scale tests, but none of which can be popularized to industrial production in the laboratory stage. The energy consumption of the metallurgical industry is huge, only 2019 years, the production amount of liquid slag in the Chinese steel industry reaches 3 hundred million tons, and each ton of slag contains sensible heat which is equivalent to 60kg of standard coal. For the sensible heat of the liquid slag of the high-quality waste heat resource, no mature recovery technology exists at present, and a large amount of sensible heat energy is dissipated in vain.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace slag sensible heat recovery fluidization cold sediment device to solve above-mentioned problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a fluidized slag cooling device for sensible heat recovery of blast furnace slag comprises a slag cooling device shell, a slag cooler main body, a fluidized fan, a high-temperature flue gas outlet and a blast furnace slag stream inlet; the slag cooler main body is arranged inside the slag cooler shell, and the slag cooler shell is provided with a high-temperature flue gas outlet and a blast furnace slag stream inlet which are communicated with the inside of the slag cooler main body; the fluidization fan is arranged at the inner bottom of the slag cooling device shell, and an outlet of the fluidization fan is communicated with the bottom of the slag cooling device main body.
Furthermore, a Laval nozzle is arranged at the inlet of the blast furnace slag stream, and the spraying direction of the Laval nozzle faces the interior of the slag cooler main body.
Further, the bottom of the slag cooler main body is provided with an air distribution plate and an air equalizing chamber; the air-equalizing chamber is communicated with the slag cooler main body, and the air distribution plates are uniformly arranged between the air-equalizing chamber and the slag cooler main body; the fluidization fan is communicated with the air equalizing chamber.
Furthermore, the inner side wall of the slag cooler main body is a membrane water-cooling wall, and a heat-insulating layer is arranged on the outer side of the membrane water-cooling wall.
Furthermore, a saturated vapor outlet is also arranged on the shell of the slag cooling device and is connected with a steam drum.
Furthermore, a slag outflow port is formed in the bottom of the slag cooler main body, a slag runner is arranged on the slag outflow port, and a screw conveyor is connected to the bottom of the slag runner. The shell of the slag cooling device is also provided with a deaerated water inlet.
Compared with the prior art, the utility model discloses there is following technological effect:
the utility model discloses cool off blast furnace slag grain fast, realize the slag grain fast cooling, one of them, absorb slag stream sensible heat by cold sediment device water wall all around, become saturated steam with water wall in-pipe. Fluidized air at the bottom of the fluidized cold slag container exchanges heat with slag particles in a convection mode, and the exchanged heat enters each heating surface of the waste heat boiler through the flue so as to exchange heat out of the flue gas for utilization. Finally, the superheated steam is generated for power generation, and the generated power can be sold in a grid-connected mode.
On the other hand, the fluidized slag cooling device rapidly cools the slag particles to form a vitreous body with the content of more than 95 percent, and the vitreous body with the content of 95 percent has good activity and is an ideal raw material for cement production, so that the commercial value of the slag particles can be maximized by subsequently grinding the slag particles, and considerable economic benefit is created. The device occupies small area and has wide applicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1, a fluidized slag cooling device for sensible heat recovery of blast furnace slag comprises a slag cooling device shell 11, a slag cooler main body, a fluidized fan 10, a high-temperature flue gas outlet 15 and a blast furnace slag stream inlet 1; the slag cooler main body is arranged inside the slag cooler shell 11, and the slag cooler shell 11 is provided with a high-temperature flue gas outlet 15 and a blast furnace slag stream inlet 1 which are communicated with the inside of the slag cooler main body; the fluidization fan 10 is arranged at the inner bottom of the slag cooler shell 11, and an outlet of the fluidization fan 10 is communicated with the bottom of the slag cooler main body.
A Laval nozzle 2 is arranged at the position of the blast furnace slag stream inlet 1, and the spraying direction of the Laval nozzle 2 faces to the inside of the slag cooler main body.
The bottom of the slag cooler main body is provided with an air distribution plate 6 and an air equalizing chamber 7; the air-homogenizing chamber 7 is communicated with the slag cooler main body, and the air distribution plates 6 are uniformly arranged between the air-homogenizing chamber 7 and the slag cooler main body; the fluidization fan 10 is communicated with the air equalizing chamber 7.
The inner side wall of the slag cooler main body is a membrane water-cooling wall 14, and an insulating layer 13 is arranged on the outer side of the membrane water-cooling wall 14.
The shell 11 of the slag cooling device is also provided with a saturated vapor outlet 16, and the saturated vapor outlet 16 is connected with a steam drum 17.
The bottom of the slag cooler main body is provided with a slag outflow port, the slag outflow port is provided with a slag runner 8, and the bottom of the slag runner 8 is connected with a screw conveyor 9.
The Laval nozzle discharges high-speed air, blast furnace slag jet flow is rapidly granulated at supersonic speed and is injected into the slag cooler, slag particles fall, liquid state of the slag particles is changed into solid state, sensible heat in the slag particles heats demineralized water in a water wall tube, and saturated steam is generated.
The slag particles are sprayed out from the jet orifice, the time t2 which is (2 Ho)/g is needed in the process of freely falling to the bottom of the furnace,
when Ho is 5m, g is 9.81m/S2, the falling time t is 1S, and in the falling process, through tests, the temperature of the slag particles is reduced by about 200 ℃ through heat exchange, namely the temperature of the slag particles is reduced from 1500 ℃ to 1300 ℃, the slag particles are changed from a liquid phase to a solid phase, and the slag particles are rapidly cooled to form a vitreous body with the content of more than 95%. Because the content of slag particle glass body is more than 95 percent, (therefore, the activity of slag powder after grinding and crushing is good, the slag particle glass body is an ideal raw material for cement production, and the economic value of the slag particle is high.)
The fluidizing fan blows fluidizing air into the air homogenizing chamber, the fluidizing air forms a bubbling fluidizing layer on the air distribution plate through the air cap, and the height of the fluidizing layer is about twice of the height of the material layer. The fluidized air continues to cool and exchange heat for the slag particles falling into the bottom of the cooler, and when the slag particles are cooled to 800 ℃ from 1300 ℃, the slag particles fall into the screw conveyor and are conveyed to the next station, and the slag particles continue to be cooled and exchanged heat.
The sensible heat of the fluidized air and the slag particles exchanges heat with the fluidized air to generate high-temperature flue gas from a flue
And the flue gas flows into a waste heat boiler, heat in the flue gas is continuously transferred to the heating surface of the boiler, finally superheated steam is generated for power generation, and the generated power can be sold in a grid-connected mode.
Claims (6)
1. The fluidized slag cooling device for sensible heat recovery of blast furnace slag is characterized by comprising a slag cooling device shell (11), a slag cooler main body, a fluidized fan (10), a high-temperature flue gas outlet (15) and a blast furnace slag stream inlet (1); the slag cooler main body is arranged inside a slag cooling device shell (11), and the slag cooling device shell (11) is provided with a high-temperature flue gas outlet (15) and a blast furnace slag stream inlet (1) which are communicated with the inside of the slag cooler main body; the fluidization fan (10) is arranged at the inner bottom of the slag cooler shell (11), and an outlet of the fluidization fan (10) is communicated with the bottom of the slag cooler main body.
2. The fluidized slag cooler for sensible heat recovery of blast furnace slag according to claim 1, characterized in that a laval nozzle (2) is arranged at the blast furnace slag stream inlet (1), and the spraying direction of the laval nozzle (2) faces the inside of the slag cooler main body.
3. The fluidized slag cooling device for sensible heat recovery of blast furnace slag according to claim 1, characterized in that the bottom of the slag cooler main body is provided with an air distribution plate (6) and an air equalizing chamber (7); the air-homogenizing chamber (7) is communicated with the slag cooler main body, and the air distribution plates (6) are uniformly arranged between the air-homogenizing chamber (7) and the slag cooler main body; the fluidization fan (10) is communicated with the air equalizing chamber (7).
4. The fluidized slag cooling device for sensible heat recovery of blast furnace slag according to claim 1, wherein the inner side wall of the slag cooler main body is a membrane water-cooling wall (14), and an insulating layer (13) is arranged on the outer side of the membrane water-cooling wall (14).
5. The fluidized slag cooling device for sensible heat recovery of blast furnace slag according to claim 1, characterized in that the slag cooling device shell (11) is further provided with a saturated vapor outlet (16), and the saturated vapor outlet (16) is connected with the steam drum (17).
6. The fluidized slag cooling device for sensible heat recovery of blast furnace slag according to claim 1, wherein a slag outflow port is arranged at the bottom of the slag cooler main body, a slag runner (8) is arranged on the slag outflow port, and a screw conveyor (9) is connected to the bottom of the slag runner (8); the shell (11) of the slag cooling device is also provided with a deoxygenated water inlet (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844355.XU CN214735859U (en) | 2020-05-19 | 2020-05-19 | Fluidized slag cooling device for sensible heat recovery of blast furnace slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844355.XU CN214735859U (en) | 2020-05-19 | 2020-05-19 | Fluidized slag cooling device for sensible heat recovery of blast furnace slag |
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| CN214735859U true CN214735859U (en) | 2021-11-16 |
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| CN202020844355.XU Active CN214735859U (en) | 2020-05-19 | 2020-05-19 | Fluidized slag cooling device for sensible heat recovery of blast furnace slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317035A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院工程热物理研究所 | Gasification cold slag device and gasification cold slag method |
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2020
- 2020-05-19 CN CN202020844355.XU patent/CN214735859U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317035A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院工程热物理研究所 | Gasification cold slag device and gasification cold slag method |
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| CP01 | Change in the name or title of a patent holder |
Address after: Room 604, 6 / F, block B, Zhonggang international, one side of Wenjing Road, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province, 710016 Patentee after: Shaanxi Yuteng energy and Environmental Protection Technology Co.,Ltd. Address before: Room 604, 6 / F, block B, Zhonggang international, one side of Wenjing Road, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province, 710016 Patentee before: Shaanxi Yuteng Energy Environmental Protection Technology Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 710018 room 604, floor 6, Zhonggang International Building B, Wenjing Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: Shaanxi Yuteng energy and Environmental Protection Technology Co.,Ltd. Address before: Room 604, 6 / F, block B, Zhonggang international, one side of Wenjing Road, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province, 710016 Patentee before: Shaanxi Yuteng energy and Environmental Protection Technology Co.,Ltd. |