CN214168012U - Blast furnace quenching slag steam waste heat utilization and white system that disappears - Google Patents
Blast furnace quenching slag steam waste heat utilization and white system that disappears Download PDFInfo
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- CN214168012U CN214168012U CN202022347446.5U CN202022347446U CN214168012U CN 214168012 U CN214168012 U CN 214168012U CN 202022347446 U CN202022347446 U CN 202022347446U CN 214168012 U CN214168012 U CN 214168012U
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model provides a blast furnace quenching sediment steam waste heat utilization and white system that disappears, including the condensing tower, the dehydration rotary drum, the one-level heat exchanger, second grade heat exchanger and hot-water tank, the condensing tower top is equipped with condensing nozzle subassembly and defroster, condensing tower sub-unit connection slag runner and granulation case, the one-level heat exchanger is located the condensing tower, divide into upper and lower two parts with the condensing tower, the following part of one-level heat exchanger steam inlet and one-level heat exchanger links to each other, its steam outlet passes through the pipeline fan and links to each other with second grade heat exchanger air inlet, the part links to each other above second grade heat exchanger gas outlet and the one-level heat exchanger, the condensing tower bottom links to each other with the feed inlet of dehydration rotary drum, the below part of dehydration rotary drum top and one-level heat exchanger links to each other, dehydration rotary drum delivery port links to each other with the hot-water tank. The utility model adopts two-stage steam heat exchange to reduce the temperature and saturation humidity of the steam; meanwhile, the cooled steam is condensed, so that the amount of discharged steam and the consumption of spray water are effectively reduced, and the recycling of steam resources is realized.
Description
Technical Field
The utility model belongs to the technical field of blast furnace quenching slag steam treatment, concretely relates to blast furnace quenching slag steam waste heat utilization and white system that disappears.
Background
Blast furnace slag is the most main byproduct of the steel industry, about 300kg of blast furnace slag is produced per ton of iron, and the smelting slag temperature is about 1450 ℃, so that the blast furnace slag is a very high-quality heat source. At present, the treatment method of blast furnace slag at home and abroad mainly adopts a water quenching method, the slag is impacted and crushed by water to form slag particles, 40-60% of high-temperature waste heat of the slag is converted into low-temperature waste heat of steam by adopting a water quenching process, and the quenched slag steam contains H2S and SO2And the paint has strong corrosivity on peripheral equipment and steel structures, and forms white steam pollution.
At present, in the production of a blast furnace, most of steam generated by contacting slag flushing water with high-temperature slag is discharged into the atmosphere at high altitude through a chimney, only a small part of steam is recycled in a steam condensation mode, but the heat carried by the steam is hardly recycled. The quenching slag steam can be directly sprayed with water for condensation treatment, but because the steam quantity is too large, the spraying water consumption is large, and a large amount of new water is wasted. In addition, if the slag flushing steam is dehumidified and whitened by a dehumidifier and other equipment, the power consumption is very remarkable due to too large steam quantity.
Because the steel industry at home and abroad lacks a mature blast furnace quenching slag steam whitening technology, a conventional whitening method is adopted, and the investment is very large. Therefore, it is necessary to develop a low-cost blast furnace quenching steam whitening technology and research a new energy-saving whitening method, which can not only utilize the low-temperature waste heat of the steam, but also reduce the environmental pollution caused by the quenching steam and recover the steam.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a blast furnace quenching slag steam waste heat utilization and white system that disappears can effectively utilize quenching slag steam waste heat, can effectively eliminate quenching slag steam emission again.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a blast furnace quenching slag steam waste heat utilization and white elimination system comprises a condensing tower, a dewatering rotary drum, a primary heat exchanger, a secondary heat exchanger and a hot water tank, wherein a condensing nozzle assembly and a demister are arranged at the top of the condensing tower, the lower part of the condensing tower is connected with a slag runner into which blast furnace slag enters, the tail end of the slag runner is provided with a granulation box, the primary heat exchanger is positioned in the condensing tower and divides the condensing tower into an upper part and a lower part, the slag runner and the granulation box are positioned below the primary heat exchanger, a steam inlet of the primary heat exchanger is connected with the lower part of the primary heat exchanger of the condensing tower, a steam outlet of the primary heat exchanger is connected with an air inlet of the secondary heat exchanger through a pipeline fan, an air outlet of the secondary heat exchanger is connected with the upper part of the primary heat exchanger of the condensing tower, the bottom of the condensing tower is connected with a feed inlet of the dewatering rotary drum, and the top of the dewatering rotary drum is connected with the lower part of the primary heat exchanger of the condensing tower, and a water outlet at the bottom of the dewatering rotary drum is connected with the hot water tank.
Furthermore, an air inlet of the primary heat exchanger is externally connected with a fan, and an air outlet of the primary heat exchanger is connected with the top of the condensing tower.
Furthermore, the primary heat exchanger is obliquely arranged in the condensation tower, and the bottom end of the primary heat exchanger is connected to the outside of the condensation tower through a pipeline.
Further, a liquid outlet of the secondary heat exchanger is connected with the hot water tank.
Furthermore, the first-stage heat exchanger and the second-stage heat exchanger both adopt dividing wall type heat exchangers.
Further, the demister is a wire mesh demister.
Furthermore, the blast furnace quenching slag steam waste heat utilization and white elimination system further comprises a cooling tower, a water outlet of the hot water tank is connected with a water inlet of the cooling tower through a water return pump, and a water outlet of the cooling tower is divided into three sections and connected with a pipeline in parallel and respectively connected with the granulation box, the condensation nozzle assembly and the secondary heat exchanger.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a blast furnace quenching slag steam waste heat utilization and white elimination system which adopts two-stage steam heat exchange, firstly utilizes steam to preheat air, then carries out gas-water heat exchange, reduces the temperature and the saturation humidity of the steam through the two-stage heat exchange, and ensures the white elimination effect of the steam; meanwhile, the cooled steam is condensed, so that the amount of discharged steam and the consumption of spray water are effectively reduced, the environmental pollution caused by quenching slag steam is reduced, and the recycling of steam resources is realized.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the blast furnace slag steam waste heat utilization and white elimination system of the utility model.
Description of reference numerals: 1. a slag runner; 2. a granulation tank; 3. a primary heat exchanger; 4. a condensing tower; 5. a condensing nozzle assembly; 6. a demister; 7. a fan; 8. a secondary heat exchanger; 9. a pipeline fan; 10. a dewatering drum; 11. a hot water tank; 12. a water return pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the embodiment provides a blast furnace quenching slag steam waste heat utilization and white elimination system, which comprises a condensation tower 4, a dehydration rotary drum 10, a primary heat exchanger 3, a secondary heat exchanger 8 and a hot water tank 11, wherein a condensation nozzle assembly 5 and a demister 6 are arranged at the top of the condensation tower 4, the lower part of the condensation tower 4 is connected with a slag runner 1 into which blast furnace slag enters, the tail end of the slag runner 1 is provided with a granulation tank 2, the primary heat exchanger 3 is positioned in the condensation tower 4 and divides the condensation tower 4 into an upper part and a lower part, the upper part is a steam condensation zone, the lower part is a steam gathering zone, the slag runner 1 and the granulation tank 2 are positioned below the primary heat exchanger 3, a steam inlet of the primary heat exchanger 3 is connected with a part below the primary heat exchanger 3 of the condensation tower 4, a steam outlet of the primary heat exchanger is connected with an air inlet of the secondary heat exchanger 8 through a pipeline fan 9, an air outlet of the secondary heat exchanger 8 is connected with a part above the primary heat exchanger 3 of the condensation tower 4, the bottom of the condensing tower 4 is connected with a feed inlet of the dewatering drum 10, the top of the dewatering drum 10 is connected with the part below the first-stage heat exchanger 3 of the condensing tower 4, and a water outlet at the bottom of the dewatering drum 10 is connected with the hot water tank 11.
The demister 6 can be a wire mesh demister, and the primary heat exchanger 3 and the secondary heat exchanger 8 can both be divided wall type heat exchangers.
In the embodiment, the blast furnace slag falls at the tail end of the slag runner 1 and is impacted by water sprayed from the granulating tank 2 to carry out slag flushing and granulating, the slag-water mixture firstly enters the bottom of the condensing tower 4 and then flows to the dewatering drum 10 to carry out slag-water separation, and the separated slag-water enters the hot water tank 11. In the process, a large amount of high-temperature quenching slag steam is generated along with the blast furnace slag meeting water, the high-temperature quenching slag steam is gathered at the part below a first-stage heat exchanger 3 of a condensing tower 4, the gathered high-temperature quenching slag steam enters the first-stage heat exchanger 3 to carry out gas-gas heat exchange, air is preheated by the high-temperature quenching slag steam to ensure the steam whitening effect, the quenching slag steam cooled by the first-stage heat exchanger 3 is led out to a second-stage heat exchanger 8 through a pipeline fan 9 to carry out gas-water heat exchange, the temperature and the saturation humidity of the high-temperature quenching slag steam are reduced after the two-stage heat exchange to form intermediate-temperature steam, the intermediate-temperature steam after the two-stage heat exchange is re-sent to the upper part of the first-, the quenching slag steam is whitened, and the residual gas in the condensing tower 4 is upwards discharged into the atmosphere after suspended liquid drops are removed by a demister 6. In the embodiment, the quenching slag steam is subjected to two-stage heat exchange of gas-gas heat exchange and gas-water heat exchange and then is subjected to condensation treatment by spraying water, the heat exchange efficiency is high, hot water is merged into the hot water tank 11 and can be used for heating in winter or refrigerating in summer, and the recycling of steam resources is realized; meanwhile, the quenching slag steam after heat exchange and temperature reduction is subjected to recondensation treatment, so that the amount of discharged steam and the consumption of spray water can be effectively reduced, and the environmental pollution caused by the quenching slag steam is reduced.
In a detailed implementation mode, an air inlet of the primary heat exchanger 3 is externally connected with a fan 7, an air outlet of the primary heat exchanger is connected with the top of the condensing tower 4, ambient air is blown into the primary heat exchanger 3 through the fan 7, the air is preheated through high-temperature quenching slag steam to generate hot air, and meanwhile, the hot air and residual gas in a steam condensing area on the upper part of the condensing tower 4 are mixed and discharged into the atmosphere, so that the recycling of the waste heat of the quenching slag steam is realized.
Optimized, one-level heat exchanger 3 inclines in condensing tower 4 and arranges, and 3 bottoms of one-level heat exchanger are connected to condensing tower 4 outsidely through the pipeline, and the steam spray water that the condensation nozzle subassembly 5 sprayed and the comdenstion water flow to the bottom along one-level heat exchanger 3's inclined plane, discharge to condensing tower 4 outsidely through the pipeline simultaneously and collect, realize the recovery reuse of resource.
For the waste heat of the quenching slag steam recovered in the secondary heat exchanger 8, in a specific implementation manner, a liquid outlet of the secondary heat exchanger 8 can be connected with the hot water tank 11, and the hot water in the secondary heat exchanger 8 after absorbing the heat of the quenching slag steam is merged into the hot water tank 11, so that the waste heat of the quenching slag steam can be used for heating in winter or refrigerating in summer, and further the waste heat recovery and utilization of the quenching slag steam can be realized.
For recycling the hot water recovered from the hot water tank 11, in a specific embodiment, a water outlet of the hot water tank 11 is connected to a cooling tower through a water return pump 12, slag water is precipitated in the hot water tank 11 and then sent to the cooling tower through the water return pump 12 for cooling, and the cooled cold water can be recycled.
To sum up, the blast furnace quenching slag steam waste heat utilization and white elimination system provided by the utility model adopts two-stage steam heat exchange, firstly utilizes steam to preheat air, then carries out gas-water heat exchange, reduces the temperature and the saturation humidity of steam through the two-stage heat exchange, and ensures the white elimination effect of the steam; meanwhile, the cooled steam is condensed, so that the amount of discharged steam and the consumption of spray water are effectively reduced, the environmental pollution caused by quenching slag steam is reduced, and the recycling of steam resources is realized.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (7)
1. The utility model provides a blast furnace quenching sediment steam waste heat utilization and white system that disappears which characterized in that: comprises a condensing tower, a dewatering rotary drum, a primary heat exchanger, a secondary heat exchanger and a hot water tank, wherein the top of the condensing tower is provided with a condensing nozzle component and a demister, the lower part of the condensing tower is connected with a slag runner into which blast furnace slag enters, and the tail end of the slag runner is provided with a granulation box, the primary heat exchanger is positioned in the condensing tower and divides the condensing tower into an upper part and a lower part, the slag runner and the granulation box are positioned below the primary heat exchanger, a steam inlet of the primary heat exchanger is connected with the part below the primary heat exchanger of the condensing tower, the steam outlet of the condenser is connected with the air inlet of the secondary heat exchanger through a pipeline fan, the air outlet of the secondary heat exchanger is connected with the part above the primary heat exchanger of the condensing tower, the bottom of the condensing tower is connected with the feed inlet of the dewatering rotary drum, the top of the dewatering rotary drum is connected with the part below the first-stage heat exchanger of the condensing tower, and the bottom water outlet of the dewatering rotary drum is connected with the hot water tank.
2. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: and an air inlet of the primary heat exchanger is externally connected with a fan, and an air outlet of the primary heat exchanger is connected with the top of the condensing tower.
3. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: the primary heat exchanger is obliquely arranged in the condensing tower, and the bottom end of the primary heat exchanger is connected to the outside of the condensing tower through a pipeline.
4. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: and a liquid outlet of the secondary heat exchanger is connected with the hot water tank.
5. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: and the primary heat exchanger and the secondary heat exchanger both adopt dividing wall type heat exchangers.
6. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: the demister is a wire mesh demister.
7. The blast furnace quenching slag steam waste heat utilization and white elimination system of claim 1, characterized in that: the water outlet of the cooling tower is divided into three sections of parallel pipelines to be respectively connected with the granulation box, the condensation nozzle assembly and the secondary heat exchanger.
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| CN202022347446.5U CN214168012U (en) | 2020-10-21 | 2020-10-21 | Blast furnace quenching slag steam waste heat utilization and white system that disappears |
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| CN202022347446.5U CN214168012U (en) | 2020-10-21 | 2020-10-21 | Blast furnace quenching slag steam waste heat utilization and white system that disappears |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430692A (en) * | 2020-10-21 | 2021-03-02 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam waste heat utilization and white spot eliminating system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430692A (en) * | 2020-10-21 | 2021-03-02 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam waste heat utilization and white spot eliminating system and method |
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