CN110699501B - Blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system - Google Patents
Blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 297
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 231100000331 toxic Toxicity 0.000 title claims abstract description 51
- 230000002588 toxic effect Effects 0.000 title claims abstract description 51
- 238000000926 separation method Methods 0.000 claims abstract description 116
- 238000003860 storage Methods 0.000 claims abstract description 86
- 238000011010 flushing procedure Methods 0.000 claims abstract description 60
- 230000000903 blocking effect Effects 0.000 claims abstract description 26
- 239000002981 blocking agent Substances 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 230000002378 acidificating effect Effects 0.000 claims description 16
- -1 alkyl naphthalene Chemical compound 0.000 claims description 12
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 12
- 239000002351 wastewater Substances 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
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- 238000001704 evaporation Methods 0.000 claims description 6
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- 238000005461 lubrication Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
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- 239000002250 absorbent Substances 0.000 claims description 4
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- 239000003899 bactericide agent Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000003995 emulsifying agent Substances 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 230000003449 preventive effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 238000001914 filtration Methods 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
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- 231100000419 toxicity Toxicity 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
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Abstract
The invention discloses a blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment comprehensive system, which comprises a slag flushing unit, a slag-water separation unit, a slag conveying unit and a water storage unit, wherein the slag flushing unit is used for flushing slag; the slag flushing unit comprises a slag flushing trench, the slag-water separation unit comprises a slag-water separation part, the slag conveying unit comprises a slag conveying part, and the water storage unit comprises a clear water storage part; the slag flushing trench is connected with a slag and water separating part, the slag and water separating part is respectively connected with a slag conveying part and a clear water storage part, the slag and water separating part transfers the separated slag to the slag conveying part, and the slag and water separating part transfers the separated water flow to the clear water storage part through a blind trench; the clear water storage part is connected with the slag flushing trench through the trench; the clear water storage part is provided with a blocking unit which limits toxic water vapor in the clear water storage part to evaporate to the atmospheric environment. The invention is novel, practical, feasible, efficient and energy-saving, and greatly reduces the one-time investment and the operation cost; is suitable for both the existing horizontal flow process and the bottom filtration process.
Description
Technical Field
The invention relates to a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution of a slag pool, belonging to the technical field of environmental treatment.
Background
At present, slag taking of blast furnace slag in a steel mill is generally carried out in a slag-dragging pool through a traveling type slag-dragging machine, and the slag taking work is completed by a manually operated slag-dragging machine. In late autumn to early spring, steam above the slag dragging pool soaks, the visibility is extremely low, the operation of workers is very difficult, and great potential safety hazards exist. In addition to the toxicity and high temperature of the water vapor, the operating environment of the operators is very harsh. In addition, the slag obtained from the horizontal flow type slag fishing pool is often wet slag, and the wet slag can scatter a lot of toxic water on the road for transporting to the cement plant, thereby causing great pollution to the road and the environment along the road and being not popular with the cement plant.
The slag flushing pool, the trench and the slag dragging pool are circulating systems for treating blast furnace slag in steel plants. Slag is quenched by water, a large amount of water vapor containing various acidic and basic chemicals is generated in the process, and the water vapor is often directly discharged into the atmosphere to generate liquid PM2.5 which seriously pollutes the air and is harmful to human health. Therefore, the slag flushing pool, the trench and the slag dragging pool are serious toxic water vapor pollution sources.
At present, some research and application examples are provided in China aiming at the problem of toxic water vapor pollution (commonly called white pollution) of a slag flushing pool and a trench. The slag salvaging pool is an open system, toxic water vapor is directly discharged to the atmosphere, and the area of the slag salvaging pool is large, so that the pollution to the atmosphere is the largest. However, except for the scheme of synthesizing the industrial acidic water vapor blocking agent by Shandong Qishideng lubrication science and technology Limited, the toxic water vapor pollution of the slag salvaging pool part does not have other mature technologies and schemes at present, some of the technologies are only conceptual, and a plurality of defects exist, and the specific current situations are as follows:
(1) the technology of 'underground giant sieve' proposed by a certain well-known university in China has the cost of each blast furnace system as high as 1.3 billion RMB, and needs the blast furnace to stop production, and although the obtained dry slag does not solve the pollution problem and needs secondary treatment.
(2) Air curtain technology: an isolation layer is artificially manufactured above the slag dragging pool by a high-power blower. The technical appearance is like isolating the toxic steam of the slag bath, but only blowing the toxic steam into the atmosphere (the practice is not liable to the environment), but not solving the pollution problem of the toxic steam, and the method has the advantages of large one-time investment, large power consumption, high running cost (the power consumption of the blower reaches millions of RMB every year), increased evaporation speed of the bath water and large waste of water resources.
(3) Covering a house: a tall house is covered above the slag salvaging pool, a slag salvaging travelling crane and the like are covered inside the slag salvaging pool, and a high-power induced draft fan is utilized to guide water vapor to a place for secondary treatment. The technology is difficult to popularize and use, and the main reasons are as follows:
A) if the house is too high, the foundation around the slag bath needs to be specially treated, and the investment is large;
B) the indoor temperature is as high as 80-90 ℃, the water vapor toxicity is high, and workers cannot carry out slag salvaging work in the room;
C) the induced draft fan can not absorb the toxic water vapor in the room completely, and the negative pressure caused by the induced draft fan can only accelerate the evaporation of the pool water, thereby causing a great deal of water resource waste;
D) the induced draft fan consumes high power, and one induced draft fan needs nearly three million RMB per year, and the operating cost is high.
E) The steam pumped away by the induced draft fan needs secondary treatment.
In conclusion, the market needs a technical scheme for blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a comprehensive system for taking and delivering blast furnace slag and treating the toxic water vapor pollution of a slag pool, which creatively changes the slag taking in the pool into the slag taking out of the pool, solves the problem of dry slag fishing, creates conditions for comprehensive and thorough treatment of the toxic water vapor pollution of the slag pool, is novel, practical, feasible, efficient and energy-saving, and greatly reduces the one-time investment and the operation cost; is suitable for both the existing horizontal flow process and the bottom filtration process.
The technical scheme for solving the technical problems is as follows: a blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system comprises a slag flushing unit, a slag-water separation unit, a slag conveying unit and a water storage unit; the slag flushing unit comprises a slag flushing pool and a slag flushing trench, the slag-water separation unit comprises a slag-water separation part, the slag conveying unit comprises a slag conveying part, and the water storage unit comprises a clear water storage part;
the slag flushing pool is connected with the slag-water separation part through the slag flushing trench, the slag-water separation part is respectively connected with the slag conveying part and the clear water storage part, the slag-water separation part transfers the separated slag to the slag conveying part, and the slag-water separation part transfers the separated water to the clear water storage part through the blind trench; the clear water storage part is connected to the slag flushing pool through a pump room;
the clean water storage part is provided with a blocking unit which limits toxic water vapor in the clean water storage part to be evaporated to the atmospheric environment.
As a preferred scheme of the blast furnace slag taking and conveying and slag pool toxic water vapor pollution treatment comprehensive system, the slag-water separation part comprises a first-stage separation component, a second-stage separation component and a third-stage separation component, the first-stage separation component and the second-stage separation component are respectively connected to the slag conveying part, the first-stage separation component, the second-stage separation component and the third-stage separation component are sequentially connected, and the third-stage separation component is connected to the clear water storage part.
As the preferable scheme of the blast furnace slag taking and conveying and slag pool toxic water vapor pollution treatment comprehensive system, the separating component adopts a drum-type slag-water separator, the drum-type slag-water separator is sealed at the bottom of a chimney, and the steam generated by the separating component is guided to a trench white-removing system of a steel mill through the chimney.
As a preferred scheme of the comprehensive system for taking and delivering blast furnace slag and treating the toxic water vapor pollution of the slag pool, the grain sizes of the separated slag of the primary separating component, the secondary separating component and the tertiary separating component are sequentially reduced.
As a preferred scheme of the blast furnace slag taking and conveying and slag pool toxic water vapor pollution treatment integrated system, the slag-water separation part comprises a primary separation component and a secondary separation component, the primary separation component and the slag conveying part form an eyelet belt type slag conveyor, the eyelet belt type slag conveyor conveys filtered water to the secondary separation component, and the secondary separation component is connected to the clear water storage part.
As a preferred scheme of the blast furnace slag taking and conveying and slag pool toxic water vapor pollution treatment comprehensive system, the slag conveying part comprises a conveying hopper and a conveying motor, the periphery of the conveying hopper is made of rubber and plastic materials, the bottom of the conveying hopper is made of wear-resistant rubber, filter holes are respectively drilled in the periphery and the bottom of the conveying hopper, a chimney is arranged at the upper part of the conveying hopper, and steam generated by the slag conveying part is guided to a trench white-removing system of a steel mill through the chimney; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
As the preferable scheme of the blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment comprehensive system, the clear water storage part is formed by converting a horizontal flow type slag salvaging pool of a steel mill.
As the preferable scheme of the blast furnace slag taking and conveying and slag pool toxic water vapor pollution treatment comprehensive system, the clear water storage part is formed by converting a bottom filter type slag salvaging pool of a steel mill.
As a preferred scheme of the comprehensive system for taking and delivering blast furnace slag and treating toxic water vapor pollution in a slag pool, the blocking unit adopts a vapor blocking agent, and the vapor blocking agent adopts a synthetic industrial acidic wastewater vapor blocking agent produced by Shandong Qishideng lubrication science and technology Limited;
the synthetic industrial acidic wastewater steam blocking agent is prepared from the following raw materials in parts by weight: 100 parts of long-chain alkyl naphthalene with carbon number more than or equal to 8 and 5-10 parts of functional additive; the long-chain alkyl naphthalene is long-chain alkyl naphthalene with the kinematic viscosity of 150-300 cst at 40 ℃;
the functional additive comprises 0.8-3.0 parts of antioxidant additive, 3.0-6.5 parts of hydrophobic agent, 0.15-0.45 part of ultraviolet radiation absorbent, 0.008-0.02 part of mildew preventive, 0.001-0.004 part of bactericide and 0.03-0.05 part of anti-emulsifier.
As the preferable scheme of the blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment comprehensive system, the blocking unit adopts a fully-closed blocking shed, the blocking shed comprises a frame and a shed body, the surface of the frame is covered with corrosion-resistant and high-temperature-resistant coating, the shed body adopts a prefabricated detachable temperature-resistant and weather-resistant engineering plastic plate, and the exposed surface of the plastic plate is coated with sunlight-reflection paint or coating.
The invention is simple and easy to operate, the effect is good, although the technical scheme is simple, the technical scheme belongs to creative and subversive technical routes and schemes, namely, the slag taking in the pool is changed into the slag taking out outside the pool, so that a more ideal condition is created for thoroughly solving the problem of toxic water vapor pollution of the slag dragging pool, the investment of a steel mill is saved, the implementation is convenient, and the whitening effect is excellent;
the taken furnace slag is dry slag, is convenient to transport, is popular with cement plants, and reduces the pollution of the furnace slag transportation process to the environment along the way;
according to the technical scheme, the traditional slag salvaging pool is not required to be used for salvaging slag, the traditional slag salvaging pool can be directly used as the clear water storage part in the technical scheme, slag is taken and sent out of the clear water storage part, impact of slag water on the liquid level of the clear water storage part is avoided, the clear water storage part is convenient to carry out full-closed management, and the pollution treatment effect is good; the slag dragging operation of the slag dragging machine is not carried out, so that the liquid level calmness of the slag pool is not influenced; if the blocking scheme is used, the blocking efficiency of steam can be greatly improved, the service life of the blocking agent can be greatly prolonged, and the one-time investment and the operation cost can be greatly reduced; it is suitable for both horizontal flow process and bottom filtering process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic view of a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag bath in example 1 of the present invention;
FIG. 2 is a schematic view of a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag bath in example 2 of the present invention;
FIG. 3 is a schematic view of a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag bath in example 3 of the present invention;
FIG. 4 is a schematic view of a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag bath in example 4 of the present invention;
FIG. 5 is a field situation diagram before the blast furnace slag treatment process smoke plume is treated by the technical scheme of the invention;
FIG. 6 is a comparison chart of the field conditions before and after the treatment of the smoke plume in the blast furnace slag treatment process by using the technical scheme of the present invention;
FIG. 7 is a comparison chart of the real situation before and after the treatment of the smoke plume in the blast furnace slag treatment process by using the technical scheme of the present invention at another view angle.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, a comprehensive system for taking and delivering blast furnace slag and treating toxic water vapor pollution in a slag pool is provided, and comprises a slag flushing unit 1, a slag-water separation unit 2, a slag conveying unit 3 and a water storage unit 4; the slag flushing unit 1 comprises a slag flushing pool 12 and a slag flushing trench, the slag-water separation unit 2 comprises a slag-water separation part 9, the slag conveying unit 3 comprises a slag conveying part 10, and the water storage unit 4 comprises a clear water storage part 11; the slag flushing trench 12 is connected with the slag and water separating part 9 through the slag flushing trench, the slag and water separating part 9 is respectively connected with the slag conveying part 10 and the clear water storage part 11, the slag and water separating part 9 transfers the separated slag to the slag conveying part 10, and the slag and water separating part 9 transfers the separated water to the clear water storage part 11 through the blind trench; the clear water storage part 11 is connected to the slag flushing pool 12 through a pump room; the clear water storage part 11 is provided with a blocking unit 5, and the blocking unit 5 limits toxic water vapor in the clear water storage part 11 to be evaporated to the atmospheric environment. The clear water storage part 11 is formed by converting a bottom filtering type slag salvaging pool or a horizontal flow type slag salvaging pool of a steel mill.
Specifically, the slag-water separation part 9 comprises a first-stage separation component 6, a second-stage separation component 7 and a third-stage separation component 8, the first-stage separation component 6 and the second-stage separation component 7 are respectively connected to the slag conveying part 10, the first-stage separation component 6, the second-stage separation component 7 and the third-stage separation component 8 are sequentially connected, and the third-stage separation component 8 is connected to the clean water storage part 11. The particle sizes of the separated slag of the primary separation assembly 6, the secondary separation assembly 7 and the tertiary separation assembly 8 are reduced in sequence.
Specifically, the separating assembly adopts a drum-type slag-water separator, the drum-type slag-water separator is sealed at the bottom of a chimney, and steam generated by the separating assembly is guided and discharged to a trench white elimination system of a steel mill through the chimney.
Specifically, the slag conveying part 10 comprises a conveying hopper and a conveying motor, wherein the periphery of the conveying hopper is made of a rubber-plastic material, and the bottom of the conveying hopper is made of wear-resistant rubber; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
Specifically, the blocking unit 5 adopts a steam blocking agent, and the steam blocking agent adopts a synthetic industrial acidic wastewater steam blocking agent produced by Shandong Qishideng lubrication science and technology Limited; the synthetic industrial acidic wastewater steam blocking agent is prepared from the following raw materials in parts by weight: 100 parts of long-chain alkyl naphthalene with carbon number more than or equal to 8 and 5-10 parts of functional additive; the long-chain alkyl naphthalene is long-chain alkyl naphthalene with the kinematic viscosity of 150-300 cst at 40 ℃; the functional additive comprises 0.8-3.0 parts of antioxidant additive, 3.0-6.5 parts of hydrophobic agent, 0.15-0.45 part of ultraviolet radiation absorbent, 0.008-0.02 part of mildew preventive, 0.001-0.004 part of bactericide and 0.03-0.05 part of anti-emulsifier. The synthetic industrial acidic wastewater steam blocking agent has small specific gravity, can float on acidic wastewater and effectively block water vapor; the flash point is high, so the saturated vapor pressure is small, the volatility is low, and the evaporation loss is small. Meanwhile, the emulsion inhibitor has excellent anti-emulsification and water separation capability, outstanding oxidation stability and thermal stability, low aging speed of products, excellent anti-mildew capability and wide adaptability to the pH value of acidic water; low toxicity, safe operation and little influence on environment. In addition, the blocking agent is simple and convenient to use, can be directly poured without shutdown or production halt, does not need system maintenance, does not influence the subsequent procedures and product quality of production, is convenient to recover, and can be universal in four seasons.
Example 2
Referring to fig. 2, a comprehensive system for taking and delivering blast furnace slag and treating toxic water vapor pollution in a slag pool is provided, and comprises a slag flushing unit 1, a slag-water separation unit 2, a slag conveying unit 3 and a water storage unit 4; the slag flushing unit 1 comprises a slag flushing pool 12 and a slag flushing trench, the slag-water separation unit 2 comprises a slag-water separation part 9, the slag conveying unit 3 comprises a slag conveying part 10, and the water storage unit 4 comprises a clear water storage part 11; the slag flushing pool 12 is connected with the slag and water separating part 9 through the slag flushing trench, the slag and water separating part 9 is respectively connected with the slag conveying part 10 and the clear water storage part 11, the slag and water separating part 9 transfers the separated slag to the slag conveying part 10, and the slag and water separating part 9 transfers the separated water to the clear water storage part 11 through the blind trench; the clear water storage part 11 is connected to the slag flushing pool 12 through a pump room; the clear water storage part 11 is provided with a blocking unit 5, and the blocking unit 5 limits toxic water vapor in the clear water storage part 11 to be evaporated to the atmospheric environment. The clear water storage part 11 is formed by converting a bottom filtering type slag salvaging pool or a horizontal flow type slag salvaging pool of a steel mill.
Specifically, the slag-water separation part 9 comprises a first-stage separation component 6, a second-stage separation component 7 and a third-stage separation component 8, the first-stage separation component 6 and the second-stage separation component 7 are respectively connected to the slag conveying part 10, the first-stage separation component 6, the second-stage separation component 7 and the third-stage separation component 8 are sequentially connected, and the third-stage separation component 8 is connected to the clean water storage part 11. The particle sizes of the separated slag of the primary separation assembly 6, the secondary separation assembly 7 and the tertiary separation assembly 8 are reduced in sequence.
Specifically, the separating assembly adopts a drum-type slag-water separator, the drum-type slag-water separator is sealed at the bottom of a chimney, and steam generated by the separating assembly is guided and discharged to a trench white elimination system of a steel mill through the chimney.
Specifically, the slag conveying part 10 comprises a conveying hopper and a conveying motor, wherein the periphery of the conveying hopper is made of a rubber-plastic material, and the bottom of the conveying hopper is made of wear-resistant rubber; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
Specifically, separation unit 5 adopts the full closed separation canopy, the separation canopy includes the skeleton and the canopy body, skeleton surface covering has corrosion-resistant, high temperature resistant coating, the canopy body adopts prefabricated detachable temperature resistant, resistant weather engineering plastic slab, and the plastic slab exposed surface scribbles sunshine reflection-type paint or coating.
Example 3
Referring to fig. 3, a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag pool is provided, which comprises a slag flushing unit 1, a slag-water separation unit 2, a slag conveying unit 3 and a water storage unit 4; the slag flushing unit 1 comprises a slag flushing pool 12 and a slag flushing trench, the slag-water separation unit 2 comprises a slag-water separation part 9, the slag conveying unit 3 comprises a slag conveying part 10, and the water storage unit 4 comprises a clear water storage part 11; the slag flushing pool 12 is connected with the slag and water separating part 9 through the slag flushing trench, the slag and water separating part 9 is respectively connected with the slag conveying part 10 and the clear water storage part 11, the slag and water separating part 9 transfers the separated slag to the slag conveying part 10, and the slag and water separating part 9 transfers the separated water to the clear water storage part 11 through the blind trench; the clear water storage part 11 is connected to the slag flushing pool 12 through a pump room; the clear water storage part 11 is provided with a blocking unit 5, and the blocking unit 5 limits toxic water vapor in the clear water storage part 11 to be evaporated to the atmospheric environment. The clear water storage part 11 is formed by converting a bottom filtering type slag salvaging pool or a horizontal flow type slag salvaging pool of a steel mill.
Specifically, the slag-water separation part 9 comprises a primary separation component 6 and a secondary separation component 7, the primary separation component 6 and the slag conveying part 10 form an eyelet belt type slag conveyor, the eyelet belt type slag conveyor conveys filtered water to the secondary separation component 7, and the secondary separation component 7 is connected to the clean water storage part 11.
Specifically, the separation assembly adopts a trench slag water filtering and slag conveying integrated machine, the assembly is a fully-closed system, and steam generated by the separation assembly is guided and discharged to a trench white elimination system of a steel mill through a chimney.
Specifically, the slag conveying part 10 comprises a conveying hopper and a conveying motor, wherein the periphery of the conveying hopper is made of a rubber-plastic material, the bottom of the conveying hopper is made of wear-resistant rubber, and filter holes are respectively drilled in the periphery and the bottom of the conveying hopper; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
Specifically, the blocking unit 5 adopts a steam blocking agent, and the steam blocking agent adopts a synthetic industrial acidic wastewater steam blocking agent produced by Shandong Qishideng lubrication science and technology Limited; the synthetic industrial acidic wastewater steam blocking agent is prepared from the following raw materials in parts by weight: 100 parts of long-chain alkyl naphthalene with carbon number more than or equal to 8 and 5-10 parts of functional additive; the long-chain alkyl naphthalene is long-chain alkyl naphthalene with the kinematic viscosity of 150-300 cst at 40 ℃; the functional additive comprises 0.8-3.0 parts of antioxidant additive, 3.0-6.5 parts of hydrophobic agent, 0.15-0.45 part of ultraviolet radiation absorbent, 0.008-0.02 part of mildew preventive, 0.001-0.004 part of bactericide and 0.03-0.05 part of anti-emulsifier. The synthetic industrial acidic wastewater steam blocking agent has small specific gravity, can float on acidic wastewater and effectively block water vapor; the flash point is high, so the saturated vapor pressure is small, the volatility is low, and the evaporation loss is small. Meanwhile, the emulsion inhibitor has excellent anti-emulsification and water separation capability, outstanding oxidation stability and thermal stability, low aging speed of products, excellent anti-mildew capability and wide adaptability to the pH value of acidic water; low toxicity, safe operation and little influence on environment. In addition, the blocking agent is simple and convenient to use, can be directly poured without shutdown or production halt, does not need system maintenance, does not influence the subsequent procedures and product quality of production, is convenient to recover, and can be universal in four seasons.
Example 4
Referring to fig. 4, a comprehensive system for handling blast furnace slag and treating toxic water vapor pollution in a slag pool is provided, which comprises a slag flushing unit 1, a slag-water separation unit 2, a slag conveying unit 3 and a water storage unit 4; the slag flushing unit 1 comprises a slag flushing pool 12 and a slag flushing trench, the slag-water separation unit 2 comprises a slag-water separation part 9, the slag conveying unit 3 comprises a slag conveying part 10, and the water storage unit 4 comprises a clear water storage part 11; the slag flushing pool 12 is connected with the slag and water separating part 9 through the slag flushing trench, the slag and water separating part 9 is respectively connected with the slag conveying part 10 and the clear water storage part 11, the slag and water separating part 9 transfers the separated slag to the slag conveying part 10, and the slag and water separating part 9 transfers the separated water to the clear water storage part 11 through the blind trench; the clear water storage part 11 is connected to the slag flushing pool 12 through a pump room; the clear water storage part 11 is provided with a blocking unit 5, and the blocking unit 5 limits toxic water vapor in the clear water storage part 11 to be evaporated to the atmospheric environment. The clear water storage part 11 is formed by converting a bottom filtering type slag salvaging pool or a horizontal flow type slag salvaging pool of a steel mill.
Specifically, the slag-water separation part 9 comprises a primary separation component 6 and a secondary separation component 7, the primary separation component 6 and the slag conveying part 10 form an eyelet belt type slag conveyor, the eyelet belt type slag conveyor conveys filtered water to the secondary separation component 7, and the secondary separation component 7 is connected to the clean water storage part 11.
Specifically, the separation assembly adopts a trench slag water filtering and slag conveying integrated machine, the assembly is a fully-closed system, and steam generated by the separation assembly is guided and discharged to a trench white elimination system of a steel mill through a chimney.
Specifically, the slag conveying part 10 comprises a conveying hopper and a conveying motor, wherein the periphery of the conveying hopper is made of a rubber-plastic material, the bottom of the conveying hopper is made of wear-resistant rubber, and filter holes are respectively drilled in the periphery and the bottom of the conveying hopper; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
Specifically, separation unit 5 adopts the full closed separation canopy, the separation canopy includes the skeleton and the canopy body, skeleton surface covering has corrosion-resistant, high temperature resistant coating, the canopy body adopts prefabricated detachable temperature resistant, resistant weather engineering plastic slab, and the plastic slab exposed surface scribbles sunshine reflection-type paint or coating.
Referring to fig. 5, before the technical scheme of the embodiment of the invention is adopted, the liquid level of the traditional slag salvaging pool is in smoke turning, the liquid level is quite uneven, and the waves are large.
Referring to fig. 6, the upper part of fig. 6 is the area which is not processed by the technical scheme of the invention, and the lower part of fig. 6 is the area which is processed by the technical scheme of the invention, the white water vapor elimination effect is obvious, and the liquid level is calm.
Referring to fig. 7, the upper part of fig. 7 is the area which is not treated by the technical solution of the present invention, and the lower part of fig. 7 is the area which is treated by the technical solution of the present invention, the white water vapor elimination effect is obvious, and the liquid level is calm.
On the whole, the invention is provided with a slag flushing unit 1, a slag-water separation unit 2, a slag conveying unit 3 and a water storage unit 4; the slag flushing unit 1 comprises a slag flushing pool 12 and a slag flushing trench, the slag-water separation unit 2 comprises a slag-water separation part 9, the slag conveying unit 3 comprises a slag conveying part 10, and the water storage unit 4 comprises a clear water storage part 11; the slag flushing pool 12 is connected with the slag and water separating part 9 through a slag flushing trench, the slag and water separating part 9 is respectively connected with the slag conveying part 10 and the clear water storing part 11, the slag and water separating part 9 transfers the separated slag to the slag conveying part 10, and the slag and water separating part 9 transfers the separated water flow to the clear water storing part 11 through a blind trench; the clear water storage part 11 is connected with the slag flushing pool 12 through a pump room; the clear water storage part 11 is provided with a blocking unit 5, and the blocking unit 5 limits toxic water vapor in the clear water storage part 11 from evaporating to the atmospheric environment.
The invention is simple and easy to implement, has good effect, and the technical scheme is simple, but belongs to creative and subversive technical routes and schemes. The slag flushing pool and the slag dragging pool are improved, so that the investment of a steel mill is saved, the implementation is convenient, and the whitening effect is excellent. The taken slag is dry slag, is convenient to transport, is popular with cement plants, and reduces the pollution of the slag transportation process to the environment along the way. Based on the technical scheme of the invention, the traditional slag salvaging pool is not required to be used for salvaging slag, the traditional slag salvaging pool can be directly used as the clear water storage part 11 in the technical scheme of the invention, and the slag is taken and sent out of the clear water storage part 11, so that the clear water storage part 11 can be managed in a totally-enclosed manner conveniently, and the pollution treatment effect is good; the liquid level of the clear water storage part 11 is not impacted by slag water, and the slag dragging operation of the slag dragging machine is not carried out, so that the liquid level calmness of the slag pool is not influenced. By using the scheme of the blocking agent, the blocking efficiency of steam can be greatly improved and the service life of the blocking agent can be greatly prolonged; the one-time investment and the operation cost are greatly reduced; it is suitable for both horizontal flow process and bottom filtering process.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system is characterized by comprising a slag flushing unit, a slag-water separation unit, a slag conveying unit and a water storage unit; the slag flushing unit comprises a slag flushing pool and a slag flushing trench, the slag-water separation unit comprises a slag-water separation part, the slag conveying unit comprises a slag conveying part, and the water storage unit comprises a clear water storage part;
the slag flushing pool is connected with the slag-water separation part through the slag flushing trench, the slag-water separation part is respectively connected with the slag conveying part and the clear water storage part, the slag-water separation part transfers the separated slag to the slag conveying part, and the slag-water separation part transfers the separated water to the clear water storage part through the blind trench; the clear water storage part is connected to the slag flushing pool through a pump room;
the clear water storage part is provided with a blocking unit which limits toxic water vapor in the clear water storage part from evaporating to the atmospheric environment;
the slag-water separation part comprises a primary separation component, a secondary separation component and a tertiary separation component, the primary separation component and the secondary separation component are respectively connected to the slag conveying part, the primary separation component, the secondary separation component and the tertiary separation component are sequentially connected, and the tertiary separation component is connected to the clear water storage part;
the separation assembly adopts a drum-type slag-water separator, the drum-type slag-water separator is sealed at the bottom of a chimney, and steam generated by the separation assembly is guided and discharged to a trench white elimination system of a steel mill through the chimney.
2. The comprehensive system for handling blast furnace slag and controlling toxic water vapor pollution in a slag pond according to claim 1, wherein the particle sizes of the separated slag of the primary separating assembly, the secondary separating assembly and the tertiary separating assembly are sequentially reduced.
3. The integrated blast furnace slag pick-up and delivery and slag bath toxic water vapor pollution abatement system of claim 1, wherein the slag-water separation section comprises a primary separation assembly and a secondary separation assembly, the primary separation assembly and the slag conveying section are formed as an eye belt slag conveyor, the eye belt slag conveyor conveys filtered water to the secondary separation assembly, and the secondary separation assembly is connected to the fresh water storage section.
4. The comprehensive system for handling the blast furnace slag and treating the toxic water vapor pollution of the slag pool according to claim 1, wherein the slag conveying part comprises a conveying hopper and a conveying motor, the periphery of the conveying hopper is made of rubber and plastic materials, the bottom of the conveying hopper is made of wear-resistant rubber, filter holes are respectively drilled in the periphery and the bottom of the conveying hopper, a chimney is arranged at the upper part of the conveying hopper, and the steam generated by the slag conveying part is guided to a trench white-removing system of a steel mill through the chimney; the conveying motor drives the conveying hopper to operate, and the conveying motor adopts an anti-corrosion and moisture-proof motor.
5. The comprehensive system for managing toxic water vapor pollution of blast furnace slag taking and delivering and slag pool according to claim 1, wherein the clear water storage part is formed by converting a horizontal flow type slag salvaging pool of a steel mill.
6. The comprehensive system for managing toxic water vapor pollution of blast furnace slag taking and conveying and slag pool according to claim 1, wherein the clean water storage part is formed by converting a bottom filter type slag salvaging pool of a steel mill.
7. The comprehensive system for handling the toxic water vapor pollution of the blast furnace slag and the slag bath according to claim 1, wherein the blocking unit adopts a vapor blocking agent, and the vapor blocking agent adopts a synthetic industrial acidic wastewater vapor blocking agent produced by Shandong Qishideng lubrication science and technology Limited;
the synthetic industrial acidic wastewater steam blocking agent is prepared from the following raw materials in parts by weight: 100 parts of long-chain alkyl naphthalene with carbon number more than or equal to 8 and 5-10 parts of functional additive; the long-chain alkyl naphthalene is long-chain alkyl naphthalene with the kinematic viscosity of 150-300 cst at 40 ℃;
the functional additive comprises 0.8-3.0 parts of antioxidant additive, 3.0-6.5 parts of hydrophobic agent, 0.15-0.45 part of ultraviolet radiation absorbent, 0.008-0.02 part of mildew preventive, 0.001-0.004 part of bactericide and 0.03-0.05 part of anti-emulsifier.
8. The comprehensive system for managing toxic water vapor pollution of blast furnace slag delivery and slag pit of claim 1, wherein said blocking unit is a fully-enclosed blocking shed, said blocking shed comprises a framework and a shed body, said framework is covered with a corrosion-resistant and high-temperature-resistant coating, said shed body is made of prefabricated detachable temperature-resistant and weather-resistant engineering plastic plate, and the exposed surface of said plastic plate is coated with sunlight-reflective paint or coating.
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| CN201910907913.4A CN110699501B (en) | 2019-09-25 | 2019-09-25 | Blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system |
| PCT/CN2020/111226 WO2021057365A1 (en) | 2019-09-25 | 2020-08-26 | Comprehensive system for blast furnace slag removal and transport and slag bath toxic water vapor pollution treatment |
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| CN100352946C (en) * | 2005-07-27 | 2007-12-05 | 刘浩 | Technique and equipment for processing blast furnace smelting slag |
| JP2009227496A (en) * | 2008-03-20 | 2009-10-08 | Jfe Steel Corp | Method for cooling molten slag |
| CN101649364B (en) * | 2009-09-04 | 2011-08-10 | 中冶赛迪工程技术股份有限公司 | Blast furnace slag processing device |
| CN105112019B (en) * | 2015-09-16 | 2017-09-05 | 山东奇士登润滑科技有限公司 | Synthesis type industrial acidic wastewater vapor barrier agent and its preparation method |
| CN207159250U (en) * | 2017-08-29 | 2018-03-30 | 中冶赛迪工程技术股份有限公司 | Filter blast furnace grain slag processing system in a kind of hydrocone type bottom |
| CN110129493A (en) * | 2019-04-16 | 2019-08-16 | 浙江菲达环保科技股份有限公司 | A kind of recycling of blast furnace water slag-flushing process waste and steam disappear white system and method |
| CN110699501B (en) * | 2019-09-25 | 2021-07-20 | 山东奇士登润滑科技有限公司 | Blast furnace slag taking and delivering and slag pool toxic water vapor pollution treatment integrated system |
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