CN108793650A - A kind of processing method of steel rolling oily sludge - Google Patents
A kind of processing method of steel rolling oily sludge Download PDFInfo
- Publication number
- CN108793650A CN108793650A CN201710283325.9A CN201710283325A CN108793650A CN 108793650 A CN108793650 A CN 108793650A CN 201710283325 A CN201710283325 A CN 201710283325A CN 108793650 A CN108793650 A CN 108793650A
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- oily sludge
- steel rolling
- reacting
- rotary kiln
- rolling oily
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Treatment Of Sludge (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of processing method of steel rolling oily sludge first mixes steel rolling oily sludge addition calcium lime powder, and calcium lime powder adding proportion is 2.5~7.5% weight ratios in steel rolling oily sludge；It is then placed in reacting in rotary kiln device and carries out low temperature gasification deoiling treatment, wherein 300~500 DEG C of temperature, coefficient of excess air 0.2~0.8, reaction time are 10~30min；The combustible fumes that reacting in rotary kiln device discharges is entered into secondary combustion chamber burning again, the heat smoke of generation returns again to the external-heat heat source into reacting in rotary kiln device as reacting in rotary kiln device, and the steel rolling oily sludge residue after de-oiling is utilized as iron making and sintering raw material.The method of the present invention has the advantages of low energy consumption, pollutant emission is low, and Commercial cultivation is returned inside de-oiled residue iron and steel enterprise.
Description
Technical field
The present invention relates to refuse processing method more particularly to a kind of processing methods of steel rolling oily sludge.
Background technology
At steel rolling oily sludge main source two：First, the direct cooling cycle waste water warp of the processes such as hot rolling, breaking down and slab
After cyclone sediment processing, then the sludge through advection sedimentation processing generation；Second is that the water outlet after eddy flow and two step of advection precipitation passes through again
Reuse after filter filtering, strip section cooling waste water refilter rear reuse after precipitation, and Filter Back Washing goes out at above-mentioned two
The sludge that water sedimentation generates；Steel rolling oily sludge has the characteristics that oil-containing, aqueous and iron oxide, general moisture content 10~
20%, oil content is 1~10%, total iron content 30~55%.The main processing method of disposal of steel rolling oily sludge has：
1) it fills, final disposal but the shortcomings that wasted there are land occupation and iron resource；
2) it burns, the shortcomings that oily (organic matter) removal effect is good, but that there are energy consumptions is higher, and discharge flue gas need to be handled；
3) low temperature distillation, can be with oil recovery and iron resource, but oil purification is more complex and cost is higher, suitable for high oily sludge
Processing；
4) molten Ji extraction, can be with oil recovery and iron resource, but there are process flow length, solvent slops to use processing troublesome and molten again
Agent safety problem；
5) Commercial cultivation is returned, predominantly cement kiln collaboration utilizes and returns Commercial cultivation inside iron and steel enterprise.
It is a preferable method that cement kiln collaboration, which utilizes, but there is the shortcomings that across factory transport, while also can be to cement kiln
The processing addition burden of flue gas；Commercial cultivation is returned inside iron and steel enterprise, is mainly had：
1) return blast furnace, furnace roof, which adds, needs briquetting to pre-process, injection can cause injection pipe abrasion the problems such as；
2) wraparound stove needs briquetting to pre-process, and exists to oily sludge sulfur content and require；
3) coking is returned, needs desiccation to mix Coal pretreatment, and because iron content is high, STRENGTH ON COKE gas permeability and coke oven refractory brick have negatively
Effect；
4) sintering is returned, oil can be volatized into flue collector flue gas in sintering process, and negative shadow is caused to the safety of electric precipitator
It rings；
5) collaboration of metallurgical environmental protection facility is handled, and is such as handled, is lacked using the rotary hearth furnace of steel mill's processing ion dust mud contaning, shaft furnace collaboration
Point can increase the burden of fume treatment；Sintering is returned from the point of view of reality, after de-oiling using being a preferable selection, is sintered in addition to containing
Outside oil mass requires, there are looser requirement, sintering itself to be equipped with complete smoke gas treatment system to other compositions, without having to worry about
Secondary pollution problem, sintered material is convenient, and the oil content for returning sintering general control oily sludge is less than 0.5%.
Invention content
The purpose of the present invention is to provide a kind of processing method of steel rolling oily sludge, have it is simple for process, easy to operate,
At low cost, valuable resource is fully used.
In order to achieve the above objectives, the technical scheme is that,
A kind of processing method of steel rolling oily sludge first mixes steel rolling oily sludge addition calcium lime powder, steel rolling oil-containing
Calcium lime powder adding proportion is 2.5~7.5% weight ratios in sludge；It is then placed in reacting in rotary kiln device and carries out low temperature gasification cracking
Deoiling treatment, wherein 300~500 DEG C of temperature, coefficient of excess air 0.2~0.8, reaction time are 10~30min；It will return again
The combustible fumes of rotary kiln reactor discharge enters secondary combustion chamber burning, and the heat smoke of generation is returned again into reacting in rotary kiln device
As the external-heat heat source of reacting in rotary kiln device, the steel rolling oily sludge residue after de-oiling is utilized as iron making and sintering raw material.
Preferably, 350~450 DEG C of the temperature of the reacting in rotary kiln device low temperature gasification deoiling treatment.
Preferably, the flue-gas temperature control for being used for reactor external-heat heat source is 500 DEG C~750 DEG C.
Preferably, hot rolling oily sludge moisture content is less than 25%, and oil content is less than 10%.
Preferably, the mesh of the grain size of the calcium lime powder≤200.
In the methods of the invention,
The ratio that calcium lime powder is added in steel rolling oily sludge is 2.5~7.5%；On the one hand can be to reduce in oily sludge
The content of free water, water suction exothermic reaction and alkaline environment have volatilization and cracking using oil content, while calcium lime powder addition has
Contaminant restraining discharges and avoids the good effect of the viscous reacting in rotary kiln device inner wall of oily sludge；Excessive material, which is added, can cause to locate
It manages load and increases cost increase.
Steel rolling oily sludge is 300~500 DEG C in reactor temperature control；It more than certain temperature just can guarantee waving for oil
Gasification reaction in hair, cracking and reactor, oil can remove thoroughly after temperature reaches certain value, and temperature is high again to increase system fortune
Row energy consumption.
Coefficient of excess air 0.2~0.8 when de-oiling in reactor is passed through a certain amount of air and can guarantee the anoxic in reacting
A certain amount of CO and CH in cracking and gasification reaction and combustible gas4Gas lights waste heat in dual firing chamber and can be used for heat source, can also protect
Card not will produce excessive tar, and coefficient of excess air is excessively high, and the heating power type pollutant generation such as meeting NO is significantly increased.
The reaction time control in reactor of steel rolling oily sludge is 10~30min, the evaporating of moisture in reactor, oil
Volatilization and cracking, the gasification reaction of organic matter need certain time, just can guarantee de-oiling effect, reaction certain time de-oiling can be thorough
It is meaningless to de-oiling to be further added by the time for bottom.
The heat smoke that the combustible fumes of reactor discharge generates after dual firing chamber lights, is used as in being covered into shell of reactor
The flue-gas temperature control of reactor external-heat heat source is 500~750 DEG C；Flue-gas temperature just can guarantee heat exchange only in this section
Temperature control is in the preferable reaction temperature that gasifies in post-reactor.
Preferably, the steel rolling oily sludge oil content is less than 10%, and one side oil content is excessively high, can increase at flue gas
De-oiling effect under the burden and reduction economic technology parameter of reason, while the excessively high more suitably method that may be used of oil-containing recycles
Oil.
Preferably, the steel rolling oily sludge moisture content is less than 25%, controls following steel rolling oily sludge and life herein
Processing in reactor can be directly entered after lime mixing, pre-processed without drying, and moisture content is excessively high can be to main reaction of gasifying
It adversely affects.
Compared with prior art, the present invention having the advantages that：
1. making full use of the heat releases such as the cracking of itself oil content of hot rolling oily sludge, combustible gas burning, low energy consumption for system processing, contains
Under the premise of oil mass is certain, itself thermal balance may be implemented, be not necessarily to external heat source.
2. realizing discharge SO 2 from fume and nitrogen by de-oiling temperature, quick lime addition and dual firing chamber's ignition temperature control
Oxide it is up to standard, be not necessarily to upper desulphurization denitration treatment facility.
3. compared with burning, because low energy consumption and is not necessarily to desulphurization denitration, operating cost is low.
4. the residue after de-oiling, total iron content is high, can return sintering production utilization, realizes total iron resource in iron and steel enterprise
Return Commercial cultivation.
Description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention will be further described.
Referring to Fig. 1, the processing method of steel rolling oily sludge of the present invention, first by steel rolling oily sludge and calcium lime powder with certain
Ratio mixing, the additive amount of calcium lime powder is depending on the aqueous of steel rolling oily sludge, oil content；It is delivered to reacting in rotary kiln device
1 kiln hood position, sludge is interior as kiln body is rolled in reacting in rotary kiln device 1, and under the action of external flue gas, sludge
Internal moisture and oily substance is become combustible gas by thermal evaporation, cracking, and sludge is in external flue gas, oil content cracking heat release, iron oxygen
The effects that changing heat release completes de-oiling and desiccation, and the residue discharge kiln body after de-oiling is recycled and returns sintering production utilization；From return
The flue gas of rotary kiln reactor discharge enters the burning of secondary combustion chamber 2, removes the organic substance in flue gas, and discharge heat and form heat
Flue gas is recycled into the casing of reacting in rotary kiln device 1, and heat source is provided for sludge in rotary kiln.
Embodiment 1
The oily sludge that one hot rolling circulating water treatment generates, oil content 7.4%, moisture content 18.1%, total iron contain
48.5% (butt) is measured, 5% calcium lime powder of 200 mesh will wherein be added, it is anti-by screw feeder feeding rotary kiln after mixing
It answers in the kiln hood of device, controlling technological parameter in reacting in rotary kiln device is：When 400 DEG C of temperature, coefficient of excess air 0.5, reaction
Between be 20min；CO mean concentrations are 2500ppm in the combustible gas of discharge, this combustible gas is lighted, and will obtain 580 DEG C of temperature
Heat smoke back to reacting in rotary kiln device external jacket in be used as external-heat heat source, the flue gas after heat exchange enters subsequent processing heel row
It puts；Residue total iron content 60.4%, CaO content 10.4%, total carbon content 2.4% after rotary kiln de-oiling, oil content and
Moisture content is zero, returns sintering production utilization.
Embodiment 2
The oily sludge that one slab circulating water treatment generates, oil content 4.5%, moisture content 15.1%, total iron contain
51.6 (butts) are measured, 3.5% quick lime of 200 mesh will wherein be added, reacting in rotary kiln is sent by screw feeder after mixing
In the kiln hood of device, controlling technological parameter in reacting in rotary kiln device is：360 DEG C of temperature, coefficient of excess air 0.4, reaction time
For 15min；CO mean concentrations are 1358ppm in the combustible gas of discharge, this combustible gas is lighted, and will obtain the heat of 520 DEG C of temperature
Flue gas back to reacting in rotary kiln device external jacket in be used as external-heat heat source, the flue gas after heat exchange enters subsequent processing heel row
It puts；Residue total iron content 60.6%, CaO content 8.4%, total carbon content 2.1% after rotary kiln de-oiling, oil content and contain
Water rate is zero, returns sintering production utilization.
Embodiment 3
The oily sludge that one breaking down circulating water treatment generates, oil content 9.9%, moisture content 22%, total iron content
7.5% quick lime will be wherein added in 47.6% (butt), be sent into the kiln hood of reacting in rotary kiln device after mixing by screw feeder
Interior, controlling technological parameter in reacting in rotary kiln device is：450 DEG C of temperature, coefficient of excess air 0.7, reaction time 25min；
CO mean concentrations are 2710ppm in the combustible gas of discharge, this combustible gas is lighted, and the heat smoke for obtaining 700 DEG C of temperature is returned
To external-heat heat source is used as in the external jacket of reacting in rotary kiln device, the flue gas after heat exchange discharges after entering subsequent processing；Rotary kiln
Residue total iron content 59.8%, CaO content 11.6%, total carbon content 2.3% after kiln tail de-oiling, oil content are less than 0.1%, contain
Water rate is zero, returns sintering production utilization.
Claims (5)
1. a kind of processing method of steel rolling oily sludge, characterized in that first mix steel rolling oily sludge addition calcium lime powder, roll
Calcium lime powder adding proportion is 2.5~7.5% weight ratios in steel oily sludge；It is then placed in reacting in rotary kiln device and carries out low temperature gas
Change deoiling treatment, wherein 300~500 DEG C of temperature, coefficient of excess air 0.2~0.8, reaction time are 10~30min；Again will
The combustible fumes of reacting in rotary kiln device discharge enters secondary combustion chamber burning, and the heat smoke of generation is returned again into reacting in rotary kiln
External-heat heat source of the device as reacting in rotary kiln device, the steel rolling oily sludge residue after de-oiling are utilized as iron making and sintering raw material.
2. the processing method of steel rolling oily sludge as described in claim 1, characterized in that the reacting in rotary kiln device low temperature gas
Change 350~450 DEG C of the temperature of deoiling treatment.
3. the processing method of steel rolling oily sludge as described in claim 1, characterized in that for reactor external-heat heat source
The control of heat smoke temperature is 500 DEG C~750 DEG C.
4. the processing method of steel rolling oily sludge as described in claim 1, characterized in that hot rolling oily sludge moisture content is less than
25%, oil content is less than 10%.
5. the processing method of steel rolling oily sludge as described in claim 1, feature sign is, the grain size of the calcium lime powder≤
200 mesh.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710283325.9A CN108793650B (en) | 2017-04-26 | 2017-04-26 | Treatment method of steel rolling oily sludge |
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| CN201710283325.9A CN108793650B (en) | 2017-04-26 | 2017-04-26 | Treatment method of steel rolling oily sludge |
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| CN108793650A true CN108793650A (en) | 2018-11-13 |
| CN108793650B CN108793650B (en) | 2021-05-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526821A (en) * | 2020-04-22 | 2021-10-22 | 宝山钢铁股份有限公司 | Method and device for resource utilization of oily sludge in steel plant |
| CN115010337A (en) * | 2022-05-19 | 2022-09-06 | 中南大学 | Oil sludge pyrolysis method |
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|---|---|---|---|---|
| EP0401811A1 (en) * | 1989-06-08 | 1990-12-12 | Nukem GmbH | Apparatus for the thermal treatment of organic and inorganic materials |
| CN1246449A (en) * | 1998-09-01 | 2000-03-08 | 姜启文 | Intermittent treating equipment of floater and oily sludge |
| CN102936087A (en) * | 2012-11-06 | 2013-02-20 | 大连海事大学 | Method for preparing pyrolysis oil and synthesis gases by pyrolysis of sludge |
| WO2016166413A1 (en) * | 2015-04-17 | 2016-10-20 | Valmet Technologies Oy | Catalytic upgrading of pyrolytic vapors |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526821A (en) * | 2020-04-22 | 2021-10-22 | 宝山钢铁股份有限公司 | Method and device for resource utilization of oily sludge in steel plant |
| CN115010337A (en) * | 2022-05-19 | 2022-09-06 | 中南大学 | Oil sludge pyrolysis method |
| CN115010337B (en) * | 2022-05-19 | 2023-12-22 | 中南大学 | Oil sludge pyrolysis method |
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| CN108793650B (en) | 2021-05-14 |
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