CN105296704A - Treatment system and process of applying sintering flue gas to dust removal water of converter - Google Patents

Treatment system and process of applying sintering flue gas to dust removal water of converter Download PDF

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Publication number
CN105296704A
CN105296704A CN201510832644.1A CN201510832644A CN105296704A CN 105296704 A CN105296704 A CN 105296704A CN 201510832644 A CN201510832644 A CN 201510832644A CN 105296704 A CN105296704 A CN 105296704A
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China
Prior art keywords
water
converter
connects
dust removal
venturi meter
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Pending
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CN201510832644.1A
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Chinese (zh)
Inventor
王连勇
仝永娟
吕子强
蔡九菊
杨承智
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Northeastern University China
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Northeastern University China
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Priority to CN201510832644.1A priority Critical patent/CN105296704A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention relates to a treatment system and process of applying sintering flue gas to dust removal water of a converter. The flue gas generated in steel making of the converter undergoes dust removal in venturi pipes, waste water with dust removed enters a coarse particle separator so as to deposit partial coarse granular sludge, then undergoes magnetic coagulation through a magnetic coagulator and flows into an efficient sloping plate sedimentation basin, the sintering flue gas exhausted from a dust removal and denitration device enters the sedimentation basin, CO2 and SO2 in the sintering flue gas in the sedimentation basin realizes neutral reaction with the alkaline dust removal water of the converter, and therefore CO2 and SO2 in the sintering flue gas are removed, the pH of the dust removal water of the converter is lowered, and the concentration of Ca2+ ions and Mg2+ ions of the dust removal water of the converter is lowered. Mud in the sedimentation basin is discharged, then dehydrated by a plate-and-frame filter press and reused in sintering. The deposited water is cooled by a cooling tower, conveyed to a clear water well, pumped to a water distribution device by a circulating pump and then redistributed to the venturi pipes for removing dust. According to the invention, waste control by waste is achieved, the economic cost of treating the sintering flue gas and the dust removal water is lowered, the resources are effectively utilized, discharge of waste water and waste gas is reduced, and the requirements of green development are met.

Description

Sinter fume is used for converter dust-removing water treatment system and technique
Technical field
The invention belongs to metallurgical technology field, particularly relate to a kind of sinter fume for converter dust-removing water treatment system and technique.
Background technology
Sintering is an important step in smelting iron and steel, belongs to the necessary links that before smelting, raw material prepares, and the flue gas of its discharge is the important source of atmospheric pollution.Sinter fume is after sinter mixture igniting, runs, the waste gas produced in high temperature sintering moulding process, containing a large amount of CO in sinter fume with chassis 2, SO 2deng gas, if this part gas does not add process just enter air, serious environmental pollution can be caused.Expedite the application sintering flue gas desulfurization, reduces discharging SO 2, be the major issue that iron and steel enterprise's environmental improvement is badly in need of solving.
At present, the clarifying smoke of China's major part converter in a wet process dedusting is main, mostly adopts the civilian tower wet dedusting technique of traditional OG bis-, a large amount of containing Ca by producing 2+and Mg 2+the dust waste water of ion, these dust waste waters have the feature of high pH value, high suspended matter, high rigidity, high alkalinity, could discharge after usually needing process.
Summary of the invention
Goal of the invention
In order to solve the problem, the present invention proposes a kind of sinter fume for converter dust-removing water treatment system and technique, utilizing the CO in sinter fume 2and SO 2carry out neutralization reaction with converter of basic lining water in dust removal, reach the object of " waste recycling ".
Technical scheme
A kind of sinter fume is used for converter dust-removing water treatment system, comprise converter body, it is characterized in that: converter body connects the first Venturi meter by cooling stack, first Venturi meter connects the second Venturi meter by curved mouth water trap, second Venturi meter is by curved mouth water trap connecting fan, and blower fan connects gas storage tank; The outflow end of curved mouth water trap connects coarse separator, coarse separator connects magnetic coacervation device, magnetic coacervation device connects efficient inclined-plate clarifying basin, efficient inclined-plate clarifying basin connects cooling tower, cooling tower connects clear water well, clear water well connects recycle pump, and recycle pump connects water trap, and water trap connects the first Venturi meter and the second Venturi meter respectively; Connect dedusting denitrification apparatus above efficient inclined-plate clarifying basin, sinter fume enters efficient inclined-plate clarifying basin after dedusting denitrification apparatus is discharged, and connects plate-and-frame filter press below efficient inclined-plate clarifying basin.
Movable gas hood is provided with between converter body and cooling stack.
A kind of water technology being used for converter dust-removing water treatment system with above-mentioned sinter fume, it is characterized in that: flue gas dedusting in the first Venturi meter, the second Venturi meter that converter steelmaking is produced, after sewage after dedusting enters coarse separator sediment fraction coarse particles mud, carry out magnetic cohesion through magnetic knockouts and certainly flow into efficient inclined-plate clarifying basin, sinter fume simultaneously after dedusting denitrification apparatus enters settling tank, CO2 and SO2 in settling tank in sinter fume and converter of basic lining water in dust removal carry out neutralization reaction; The mud of settling tank is discharged by the spiral slurry conveying machine at the bottom of pond, after plate-and-frame filter press dehydration, return sintering and use, the water after precipitation is sent to clear water well through cooling tower cooling, recycling recycle pump is evacuated in water trap, is reassigned to the first Venturi meter, the second Venturi meter dedusting uses.
Described magnetic knockouts selects electromagnetic type.
In efficient inclined-plate clarifying basin, the CO in sinter fume 2and SO 2carry out neutralization reaction with converter of basic lining water in dust removal, remove CO in sinter fume 2and SO 2while reduce pH and Ca of converter dedusting water 2+, Mg 2+the concentration of ion.
Described plate-and-frame filter press selects two barrier film plate-and-frame filter press; Two barrier film plate-and-frame filter press is aided with pressurized air secondary extrusion simultaneously, water quality SS≤150mg/L after filter, be directly back to clear water well and recycle, and the mud of water ratio less than 25% delivers to feed bin by conveying belt.
Advantage and effect
Advantage of the present invention and beneficial effect as follows:
The water in dust removal of the flue gas that sintering produces by the present invention and the flue gas that converter steelmaking produces carries out neutralization reaction, eliminates the CO in sinter fume 2and SO 2, reduce pH and Ca of converter dedusting water simultaneously 2+, Mg 2+the concentration of ion, decreases the Financial cost of sinter fume process and dust-water treatment while achieving " treatment of wastes with processes of wastes against one another "; The mud of settling tank returns sintering and uses, for converter mud resource utilization creates conditions after plate-and-frame filter press dehydration; Water after precipitation is sent to clear water well through cooling tower cooling, and recycling recycle pump is evacuated in water trap, is reassigned to a Venturi meter, two Venturi meter dedustings use.Present invention achieves effective utilization of resource, decrease the discharge of waste water, waste gas, meet the policy of Green Development.
Accompanying drawing explanation
Fig. 1 is that sinter fume of the present invention is for converter dust-removing water treatment system structural representation.
Description of reference numerals:
1-converter body 2-movable gas hood 3-cooling stack 4-first Venturi meter 5-second Venturi meter 6-curved mouth water trap 7-blower fan 8-gas storage tank 9-water trap 10-coarse separator 11-magnetic knockouts 12-efficient inclined-plate clarifying basin 13-plate-and-frame filter press 14-sinter fume 15-dedusting denitrification apparatus 16-cooling tower 17-clear water well 18-recycle pump.
embodiment:
Below in conjunction with accompanying drawing, the present invention is described further:
Be illustrated in figure 1 this sinter fume of the present invention for converter dust-removing water treatment system structural representation,
Described sinter fume is used for converter dust-removing water treatment system, comprise converter body 1, converter body 1 connects the first Venturi meter 4 by cooling stack 3, first Venturi meter 4 connects the second Venturi meter 5 by curved mouth water trap 6, second Venturi meter 5 is by curved mouth water trap 6 connecting fan 7, and blower fan 7 connects gas storage tank 8; The outflow end of curved mouth water trap 6 connects coarse separator 10, coarse separator 10 connects magnetic coacervation device 11, magnetic coacervation device 11 connects efficient inclined-plate clarifying basin 12, efficient inclined-plate clarifying basin 12 connects cooling tower 16, cooling tower 16 connects clear water well 17, clear water well 17 connects recycle pump 18, and recycle pump 18 connects water trap 9, and water trap 9 connects the first Venturi meter 4 and the second Venturi meter 5 respectively; Connect dedusting denitrification apparatus 15 above efficient inclined-plate clarifying basin 12, sinter fume 14 enters efficient inclined-plate clarifying basin 12 after dedusting denitrification apparatus 15 is discharged, and connects plate-and-frame filter press 13 below efficient inclined-plate clarifying basin 12.
Coarse separator 10 separable go out the coarse particles of more than 60 μm, after a part of coarse particles mud of precipitation, enter magnetic knockouts 11 again; Magnetic knockouts 11 removes the magnetic substance such as numerous iron scale and heavy metal in steel-making converter waste water; Efficient inclined-plate clarifying basin 12 is adopted to realize solid-liquid separation in waste water, rapid spoil disposal and thickened sludge; Adopt plate-and-frame filter press to carry out sludge dewatering, after press filtration, moisture content of the cake is generally less than 25%, realizes the object that dirt mud is sent to sintered material.
Be provided with movable gas hood 2 between converter body 1 and cooling stack 3, for the high-temperature flue gas better trapped, produce in transporting converter steelmaking process, prevent extraneous air intrusion effect coal-gas recovering quality simultaneously and prevent flue gas from escaping deterioration workshop condition.
The technique that converter dust-removing water treatment system carries out water treatment is used for above-mentioned sinter fume, it is flue gas dedusting in the first Venturi meter, the second Venturi meter that converter steelmaking is produced, after sewage after dedusting enters coarse separator sediment fraction coarse particles mud, carry out magnetic cohesion through magnetic knockouts and certainly flow into efficient inclined-plate clarifying basin, sinter fume simultaneously after dedusting denitrification apparatus enters settling tank, CO2 and SO2 in settling tank in sinter fume and converter of basic lining water in dust removal carry out neutralization reaction; The mud of settling tank is discharged by the spiral slurry conveying machine at the bottom of pond, after plate-and-frame filter press dehydration, return sintering and use, the water after precipitation is sent to clear water well through cooling tower cooling, recycling recycle pump is evacuated in water trap, is reassigned to the first Venturi meter, the second Venturi meter dedusting uses.
The flow process that described sinter fume is used for converter dust-removing water technology is as follows: first carry out dust removal process to the flue gas that converter steelmaking produces.The flue gas that converter steelmaking 1 produces carries out dedusting after movable gas hood 2, cooling stack 3 in the first Venturi meter 4, second Venturi meter 5, is sent to gas storage tank 8 subsequently by blower fan 7.Sewage after first Venturi meter, the second Venturi meter dedusting flows out through curved mouth water trap 6, enter after coarse separator 10 sediment fraction coarse particles mud through chute again, carry out magnetic cohesion through magnetic knockouts 11 and from flowing into efficient inclined-plate clarifying basin 12, in settling tank, adding polymeric flocculant carry out flocculating, adding bariumchloride minimizing sulphate content.Sinter fume 14 after dedusting denitrification apparatus 15 enters settling tank, the CO in settling tank in sinter fume 2and SO 2the a large amount of Ca existed with converter of basic lining water in dust removal 2+carry out neutralization reaction, remove CO in sinter fume 2and SO 2while reduce pH and Ca of converter dedusting water 2+, Mg 2+the concentration of ion.
SO 2and CO 2with Ca (OH) 2reaction formula as follows:
Ca (OH) 2+ SO 2=CaSO 3↓+H 2o, works as SO 2time excessive, Ca (OH) 2+ 2SO 2=Ca (HSO 3) 2
Ca (OH) 2+ CO 2=CaCO 3↓+H 2o, works as CO 2time excessive, Ca (OH) 2+ 2CO 2=Ca (HCO 3) 2
The mud of settling tank is discharged by the spiral slurry conveying machine at the bottom of pond, after plate-and-frame filter press 13 dewaters, return sintering and use, the water after precipitation is sent to clear water well 17 through cooling tower 16 cooling, recycling recycle pump 18 is evacuated in water trap 9, is reassigned to the first Venturi meter, the second Venturi meter dedusting uses.
Magnetic knockouts preferentially selects electromagnetic type, and its process converter gas washes equipment is simple, lightweight, less investment, safe and reliable to operation.Ferric oxide particles in waste water produces magneticinduction when flowing through magnetic field, and has remanent magnetism when leaving magnetic field, and the particulate in such water collides with each other and attracts to condense into larger flco thus accelerate precipitation in settling tank.Test proof, the waste water through the process of magnetic knockouts still has the effect suppressing incrustation scale, and has the function of " molten dirt " simultaneously.
Described plate-and-frame filter press preferentially selects two barrier film plate-and-frame filter press, and this machine is simple to operate, moisture content of the cake is low (being generally less than 25%), working efficiency is high, energy consumption is low, mud cake traffic capacity is few, reliable.Two barrier film plate-and-frame filter press is aided with pressurized air secondary extrusion simultaneously, water quality SS≤150mg/L after filter, directly be back to clear water well to recycle, and the mud of water ratio less than 25% delivers to feed bin by conveying belt, sintering plant working conditions can be improved and improve sinter quality, for converter mud resource utilization creates conditions.

Claims (6)

1. a sinter fume is used for converter dust-removing water treatment system, comprise converter body (1), it is characterized in that: converter body (1) connects the first Venturi meter (4) by cooling stack (3), first Venturi meter (4) connects the second Venturi meter (5) by curved mouth water trap (6), second Venturi meter (5) is by curved mouth water trap (6) connecting fan (7), and blower fan (7) connects gas storage tank (8); The outflow end of curved mouth water trap (6) connects coarse separator (10), coarse separator (10) connects magnetic coacervation device (11), magnetic coacervation device (11) connects efficient inclined-plate clarifying basin (12), efficient inclined-plate clarifying basin (12) connects cooling tower (16), cooling tower (16) connects clear water well (17), clear water well (17) connects recycle pump (18), and recycle pump (18) connects water trap (9), and water trap (9) connects the first Venturi meter (4) and the second Venturi meter (5) respectively; Efficient inclined-plate clarifying basin (12) top connects dedusting denitrification apparatus (15), and sinter fume (14) enters efficient inclined-plate clarifying basin (12) after dedusting denitrification apparatus (15) is discharged, and efficient inclined-plate clarifying basin (12) below connects plate-and-frame filter press (13).
2. sinter fume according to claim 1 is used for converter dust-removing water treatment system, it is characterized in that: be provided with movable gas hood (2) between converter body (1) and cooling stack (3).
3. one kind is used for the water technology of converter dust-removing water treatment system with sinter fume described in claim 1, it is characterized in that: flue gas dedusting in the first Venturi meter, the second Venturi meter that converter steelmaking is produced, after sewage after dedusting enters coarse separator sediment fraction coarse particles mud, carry out magnetic cohesion through magnetic knockouts and certainly flow into efficient inclined-plate clarifying basin, sinter fume simultaneously after dedusting denitrification apparatus enters settling tank, CO2 and SO2 in settling tank in sinter fume and converter of basic lining water in dust removal carry out neutralization reaction; The mud of settling tank is discharged by the spiral slurry conveying machine at the bottom of pond, after plate-and-frame filter press dehydration, return sintering and use, the water after precipitation is sent to clear water well through cooling tower cooling, recycling recycle pump is evacuated in water trap, is reassigned to the first Venturi meter, the second Venturi meter dedusting uses.
4. sinter fume according to claim 3 is used for converter dust-removing water technology, it is characterized in that: described magnetic knockouts selects electromagnetic type.
5. sinter fume according to claim 3 is used for converter dust-removing water technology, it is characterized in that: in efficient inclined-plate clarifying basin (12), the CO in sinter fume 2and SO 2carry out neutralization reaction with converter of basic lining water in dust removal, remove CO in sinter fume 2and SO 2while reduce pH and Ca of converter dedusting water 2+, Mg 2+the concentration of ion.
6. sinter fume according to claim 3 is used for converter dust-removing water technology, it is characterized in that: described plate-and-frame filter press selects two barrier film plate-and-frame filter press; Two barrier film plate-and-frame filter press is aided with pressurized air secondary extrusion simultaneously, water quality SS≤150mg/L after filter, be directly back to clear water well and recycle, and the mud of water ratio less than 25% delivers to feed bin by conveying belt.
CN201510832644.1A 2015-11-26 2015-11-26 Treatment system and process of applying sintering flue gas to dust removal water of converter Pending CN105296704A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191369A (en) * 2016-08-30 2016-12-07 中冶南方工程技术有限公司 A kind of converter gas wet dedusting drainage arrangement
CN112062354A (en) * 2020-09-25 2020-12-11 湖南华菱湘潭钢铁有限公司 Method for reducing hardness of dust removal water of converter flue gas
CN112125540A (en) * 2020-09-27 2020-12-25 武汉钢铁有限公司 Method for recycling blast furnace gas mud by using slag stewing process
CN112941264A (en) * 2021-03-24 2021-06-11 中冶南方工程技术有限公司 Converter flue gas dry-type purification and waste heat recovery system and method
CN114364640A (en) * 2020-01-31 2022-04-15 栗田工业株式会社 Method and apparatus for treating converter waste gas dust collecting water

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
仝永娟 等: "烧结烟气用于转炉除尘水处理的实验研究", 《第八届全国能源与热工学术年会论文集》 *
张建国 等: "转炉烟气除尘污水处理技术实践", 《2011年全国技术中心建设与新品开发研讨会会议论文集》 *
王永民 等: "210t转炉除尘水处理系统的改造", 《包钢科技》 *
马祥庆: "青钢转炉除尘水处理改造工程简介", 《冶金动力》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191369A (en) * 2016-08-30 2016-12-07 中冶南方工程技术有限公司 A kind of converter gas wet dedusting drainage arrangement
CN114364640A (en) * 2020-01-31 2022-04-15 栗田工业株式会社 Method and apparatus for treating converter waste gas dust collecting water
CN112062354A (en) * 2020-09-25 2020-12-11 湖南华菱湘潭钢铁有限公司 Method for reducing hardness of dust removal water of converter flue gas
CN112125540A (en) * 2020-09-27 2020-12-25 武汉钢铁有限公司 Method for recycling blast furnace gas mud by using slag stewing process
CN112941264A (en) * 2021-03-24 2021-06-11 中冶南方工程技术有限公司 Converter flue gas dry-type purification and waste heat recovery system and method
CN112941264B (en) * 2021-03-24 2023-10-27 中冶南方工程技术有限公司 Dry type converter flue gas purification and waste heat recovery system and method

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