CN109759422A - The processing method of blast furnace steel scrap paint removal - Google Patents
The processing method of blast furnace steel scrap paint removal Download PDFInfo
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- CN109759422A CN109759422A CN201910059502.4A CN201910059502A CN109759422A CN 109759422 A CN109759422 A CN 109759422A CN 201910059502 A CN201910059502 A CN 201910059502A CN 109759422 A CN109759422 A CN 109759422A
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Abstract
The invention discloses a kind of blast furnace processing methods of steel scrap paint removal, the following steps are included: the steel scrap that steel scrap crushing production line generates is sent into steel scrap storehouse by melt pit, belt feeder, subsequently into stepping furnace, stepping furnace bucket is sent into through charging gear, steel scrap is discharged into deslagging device and enters drying grate after mixing with air burning, and after dressing sieve, it is delivered to stockyard；Steel scrap enters combustion chamber, and ignition temperature is 800 DEG C, and the flue gas generated after burning enters gasification cooling pipe, and inside gasification cooling stack, atomized water spray is cooling, and flue-gas temperature is down to 600 DEG C, then by afterheat heat exchanger, temperature is down to 180 DEG C；Flue gas after cooling enters dry-type desulfurizing tower, sprays into lime mist and eliminates SO2, and SO is removed by the way that packing course is arranged in tower again2, the flue gas of dioxin pernicious gas enters bag filter and is dusted, and through air-introduced machine, clean gas is discharged chimney.Realize steel scrap active combustion and the problem of flue gas is preferably handled.
Description
Technical field
The present invention relates to fine work steel preparation technical fields, and in particular to the processing method of blast furnace steel scrap paint removal.
Background technique
The granular steel scrap that steel scrap crushing production line generates, containing organic matters such as paint, oil, into after blast furnace, oil etc. is being restored
Effective burning is not can be carried out under property atmosphere, as blast furnace gas enters gravitational dust collection, dry-method bag-type dust collecting causes filter bag surface
The a large amount of oil of congestion, causes resistance of the filter bag to increase, and dust remover resistance increases, and influences the direct motion of blast furnace.
Steel scrap of the processing with attachments such as rubber, greasy dirts burns, and removes steel scrap surface impurity (rubber, greasy dirt etc.), will
Clean steel scrap, which is sent into State of Blast Furnace, to be smelted.But the general procedure mode of the past country is, stockyard is burned, and flue gas is straight
The mode for connecing bulk storage causes a large amount of harmful substances to distribute naturally in an atmosphere, pollutes environment, destroys the ecological balance, harmful to human
It is physically and mentally healthy.
Summary of the invention
The purpose of the present invention is to provide a kind of blast furnace processing method of steel scrap paint removal, realize steel scrap active combustion and
The problem of flue gas is preferably handled.
In order to solve the above technical problems, the invention adopts the following technical scheme:
The processing method of blast furnace steel scrap paint removal, comprising the following steps:
S1: the steel scrap that steel scrap crushing production line generates is sent into steel scrap storehouse by melt pit, belt feeder, subsequently into stepping furnace, through giving
Expect that device is sent into stepping furnace bucket, steel scrap is discharged into deslagging device and enters drying grate after mixing with air burning, and after dressing sieve, defeated
It send to stockyard；
S2: steel scrap enters combustion chamber, and ignition temperature is 800 DEG C, and the flue gas generated after burning enters gasification cooling pipe, in gas
Change inside cooling stack, atomized water spray is cooling, and flue-gas temperature is down to 600 DEG C, then by afterheat heat exchanger, temperature is down to 180 DEG C；
S3: the flue gas after cooling enters dry-type desulfurizing tower, sprays into lime mist and eliminates SO2, and again by the way that packing course, removal are arranged in tower
SO2, the flue gas of dioxin pernicious gas enters bag filter and is dusted, and through air-introduced machine, clean gas is discharged chimney.
Further；Steel scrap warehouse product is 300m in the S13, stepping furnace is delivered to by disk feeder.
Further；It is 43.2m that stepping furnace, which effectively roasts area, in the S12, ability 150t/h, coal gas consumption is
15000Nm³/h；
Stepping furnace two sides arrange that coal gas burner, the steel scrap that ignites paint, after waste oil, are inhaled into furnace lower flue, steel scrap, which is transported to, to be turned over
Vehicle device, tippler is cooling by steel scrap push-in drying grate and conveys.
Further；The cooling stack capacity of equipment that gasifies in the S2 is 300,000 m3/h high-temperature flue gas, input gas temperature
It is 850 DEG C to 1000 DEG C, outlet temperature is 600 DEG C, water consumption 50t/h；
Atomization gas nitrogen pressure is 1.0MPa, and flow 1000m3/h, single branch spray gun water is 55.5Kg/min.
Further；Flue gas after cooling down in the S3 enters desulfurization through venturi nozzle from the bottom of semi-dry desulphurization tower
In tower, calcium hydroxide powder sprays into desulfurizing tower by pneumatic conveying form, and the sulfur dioxide in fluidised powder and flue gas is acid
Gas chemically reacts in desulfurizing tower；
The capacity of equipment of half dry type desulfurizing tower is sorbent consumption 600kg/h, water consumption 12t/h.
Further；The high-temperature flue gas that combustion process generates in the S3 burns by high-temperature flue to 850 DEG C to 1000
℃。
Further；Packing course is coke layer or active carbon layer in the S3.
Compared with prior art, of the invention one of at least to have the advantages that:
1, in the present invention that the steel scrap of collection is broken into steel scrap storehouse, then sieved after entering drying grate by stepping furnace, it sieves
The steel scrap that cannot be utilized or can not be used again afterwards is sent to stockyard, then the steel scrap in stockyard is burnt, and burning generates flue gas, flue gas into
Enter the cooling pipe that gasifies and be cooled to 600 DEG C, then is cooled to 180 DEG C by afterheat heat exchanger, the dry type desulfurizing again of the flue gas after cooling
Tower desulfurization, the gas after desulfurization pass through packing course again and are adsorbed and removed SO2, dioxin pernicious gas, finally by bag filter into
Row dedusting, then clean gas is discharged by chimney by air-introduced machine, conducive to the processing that blast furnace steel scrap and steel scrap japanning burn, subtract
Of low pollution.
2, steel scrap warehouse product is 300m3Convenient for the collection of a certain amount of steel scrap, stepping furnace is entered back into, conducive to the collection of raw material.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1:
The processing method of blast furnace steel scrap paint removal, comprising the following steps:
S1: the steel scrap that steel scrap crushing production line generates is sent into steel scrap storehouse by melt pit, belt feeder, subsequently into stepping furnace, through giving
Expect that device is sent into stepping furnace bucket, steel scrap is discharged into deslagging device and enters drying grate after mixing with air burning, and after dressing sieve, defeated
It send to stockyard；
S2: steel scrap enters combustion chamber, and ignition temperature is 880 DEG C, and the flue gas generated after burning enters gasification cooling pipe, in gas
Change inside cooling stack, atomized water spray is cooling, and flue-gas temperature is down to 600 DEG C, then by afterheat heat exchanger, temperature is down to 180 DEG C；
S3: the flue gas after cooling enters dry-type desulfurizing tower, sprays into lime mist and eliminates SO2, and again by the way that packing course, removal are arranged in tower
SO2, the flue gas of dioxin pernicious gas enters bag filter and is dusted, and through air-introduced machine, clean gas is discharged chimney；It will
The steel scrap of collection is broken to enter steel scrap storehouse, then is sieved after entering drying grate by stepping furnace, cannot utilize after dressing sieve or cannot
The steel scrap reused is sent to stockyard, then the steel scrap in stockyard is burnt, and the ignition temperature of combustion chamber is that 800 DEG C of burnings generate cigarette
Gas, flue gas enters gasification cooling pipe and is cooled to 600 DEG C, then is cooled to 180 DEG C by afterheat heat exchanger, and the flue gas after cooling is again
Dry-type desulfurizing tower desulfurization, the gas after desulfurization pass through packing course again and are adsorbed and removed SO2, dioxin pernicious gas, finally through cloth bag
Deduster is dusted, then clean gas is discharged by chimney by air-introduced machine, is conducive to blast furnace steel scrap and steel scrap japanning burns
Processing, meet needs, reduce pollution.
Embodiment 2:
On the basis of embodiment 1, steel scrap warehouse product is 300m in S13, stepping furnace is delivered to by disk feeder；Steel scrap storehouse
Volume is 300m3Convenient for the collection of a certain amount of steel scrap, stepping furnace is entered back into, conducive to the collection of raw material.
Embodiment 3:
It is 43.2m that stepping furnace, which effectively roasts area, on the basis of embodiment 1-2, in S12, ability 150t/h, coal gas consumption
For 15000Nm3/h；
Stepping furnace two sides arrange that coal gas burner, the steel scrap that ignites paint, after waste oil, are inhaled into furnace lower flue, steel scrap, which is transported to, to be turned over
Vehicle device, tippler is cooling by steel scrap push-in drying grate and conveys；Effective roasting area of stepping furnace is 43.2m2, ability is
150t/h, coal gas consumption are 15000Nm3/h；Laser heating heat treatment is carried out convenient for stepping furnace；And the coal gas of stepping furnace two sides is burnt
Mouth can be by steel scrap paint, Waste-oil combustion, and the flue gas generated that burns is absorbed by furnace lower flue, and steel scrap is transported to tippler.
Embodiment 4
The cooling stack capacity of equipment that gasifies on the basis of embodiment 1-3, in S2 is 300,000 m3/h high-temperature flue gas, import flue gas temperature
Degree is 850 DEG C to 1000 DEG C, and outlet temperature is 600 DEG C, water consumption 50t/h；
Atomization gas nitrogen pressure is 1.0MPa, and flow 1000m3/h, single branch spray gun water is 55.5Kg/min；Burning generates
Flue gas cooled down by cooling stack, conducive to burning generate flue gas cool down, meet needs.
Embodiment 5
On the basis of examples 1 to 4, the flue gas after cooling down in S3 enters from the bottom of semi-dry desulphurization tower through venturi nozzle
In desulfurizing tower, calcium hydroxide powder sprays into desulfurizing tower by pneumatic conveying form, the sulfur dioxide in fluidised powder and flue gas
Sour gas chemically reacts in desulfurizing tower；
The capacity of equipment of half dry type desulfurizing tower is sorbent consumption 600kg/h, water consumption 12t/h；Flue gas after cooling using
Desulfurization process, and the acidity in flue gas can spray into desulfurizing tower by pneumatic conveying form by calcium hydroxide powder, it is fluidised
The sour gas such as the sulfur dioxide in material and flue gas chemically react in desulfurizing tower, and most sulfur dioxide is fallen in removing
Equal sour gas；Atomized water, which is uniformly injected into desulfurizing tower by (operating) water nozzle, makes flue gas uniform decrease in temperature, reaches desulphurization reaction
Optimum response state.
Embodiment 6
On the basis of embodiment 1-5, the high-temperature flue gas that combustion process generates in S3 burns to 850 DEG C extremely by high-temperature flue
1000℃；It is complete convenient for combustion process.
Embodiment 7
On the basis of embodiment 1-6, packing course is coke layer or active carbon layer in S2；Conducive to the substance of desulfurization will be unable in flue gas
Adsorption treatment is carried out, needs are met.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.It more specifically, within the scope of the present disclosure and claims, can be to master
The building block and/or layout for inscribing composite configuration carry out a variety of variations and modifications.In addition to what is carried out to building block and/or layout
Outside modification and improvement, to those skilled in the art, other purposes also be will be apparent.
Claims (7)
1. a kind of blast furnace processing method of steel scrap paint removal, it is characterised in that: the following steps are included:
S1: the steel scrap that steel scrap crushing production line generates is sent into steel scrap storehouse by melt pit, belt feeder, is then sent into stepping through charging gear
Furnace bucket, steel scrap is discharged into deslagging device and enters drying grate after mixing with air burning, and after dressing sieve, is delivered to stockyard；
S2: steel scrap enters combustion chamber, and ignition temperature is 800 DEG C, and the flue gas generated after burning enters gasification cooling pipe, in gas
Change inside cooling stack, atomized water spray is cooling, and flue-gas temperature is down to 600 DEG C, then by afterheat heat exchanger, temperature is down to 180 DEG C；
S3: the flue gas after cooling enters dry-type desulfurizing tower, sprays into lime mist and eliminates SO2, and again by the way that packing course, removal are arranged in tower
SO2, the flue gas of dioxin pernicious gas enters bag filter and is dusted, and through air-introduced machine, clean gas is discharged chimney.
2. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: steel scrap warehouse in the S1
Product is 300m3, stepping furnace is delivered to by disk feeder.
3. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: there is stepping furnace in the S1
Effect roasting area is 43.2m2, ability 150t/h, coal gas consumption is 15000Nm3/h；
Stepping furnace two sides arrange that coal gas burner, the steel scrap that ignites paint, after waste oil, are inhaled into furnace lower flue, steel scrap, which is transported to, to be turned over
Vehicle device, tippler is cooling by steel scrap push-in drying grate and conveys.
4. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: cooling of gasifying in the S2
Air flue equipment ability is 300,000 m3/h high-temperature flue gas, and input gas temperature is 850 DEG C to 1000 DEG C, and outlet temperature is 600 DEG C, is used
Water is 50t/h；
Atomization gas nitrogen pressure is 1.0MPa, and flow 1000m3/h, single branch spray gun water is 55.5Kg/min.
5. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: after cooling down in the S3
Flue gas enters in desulfurizing tower from the bottom of semi-dry desulphurization tower through venturi nozzle, and calcium hydroxide powder is sprayed by pneumatic conveying form
Enter desulfurizing tower, the sulfur dioxide sour gas in fluidised powder and flue gas chemically reacts in desulfurizing tower；
The capacity of equipment of half dry type desulfurizing tower is sorbent consumption 600kg/h, water consumption 12t/h.
6. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: combustion process in the S3
The high-temperature flue gas of generation burns by high-temperature flue to 850 DEG C to 1000 DEG C.
7. the blast furnace according to claim 1 processing method of steel scrap paint removal, it is characterised in that: packing course is coke in the S3
Layer of charcoal or active carbon layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059502.4A CN109759422A (en) | 2019-01-22 | 2019-01-22 | The processing method of blast furnace steel scrap paint removal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059502.4A CN109759422A (en) | 2019-01-22 | 2019-01-22 | The processing method of blast furnace steel scrap paint removal |
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| CN109759422A true CN109759422A (en) | 2019-05-17 |
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| CN201910059502.4A Pending CN109759422A (en) | 2019-01-22 | 2019-01-22 | The processing method of blast furnace steel scrap paint removal |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264041A (en) * | 2013-05-29 | 2013-08-28 | 遵化市益久矿山机械有限公司 | Hot-working treatment device and method for daily metal garbage |
| CN106180157A (en) * | 2016-09-08 | 2016-12-07 | 重庆伟晋环保科技有限公司 | The method utilizing blast furnace harmlessness disposing waste oil paint can |
| CN107261788A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | The removal methods and device of a kind of high-temperature flue gas Zhong bioxin |
| CN206643358U (en) * | 2017-04-25 | 2017-11-17 | 唐山鑫虎重型矿山机械有限公司 | With the equipment of the hot-forming metallurgical raw material metal bloom of waste metal rubbish |
-
2019
- 2019-01-22 CN CN201910059502.4A patent/CN109759422A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264041A (en) * | 2013-05-29 | 2013-08-28 | 遵化市益久矿山机械有限公司 | Hot-working treatment device and method for daily metal garbage |
| CN106180157A (en) * | 2016-09-08 | 2016-12-07 | 重庆伟晋环保科技有限公司 | The method utilizing blast furnace harmlessness disposing waste oil paint can |
| CN206643358U (en) * | 2017-04-25 | 2017-11-17 | 唐山鑫虎重型矿山机械有限公司 | With the equipment of the hot-forming metallurgical raw material metal bloom of waste metal rubbish |
| CN107261788A (en) * | 2017-06-12 | 2017-10-20 | 北京科技大学 | The removal methods and device of a kind of high-temperature flue gas Zhong bioxin |
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