CN108793665A - A kind of processing method of cold rolling oil-containing waste water biological sludge and application - Google Patents
A kind of processing method of cold rolling oil-containing waste water biological sludge and application Download PDFInfo
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- CN108793665A CN108793665A CN201710295205.0A CN201710295205A CN108793665A CN 108793665 A CN108793665 A CN 108793665A CN 201710295205 A CN201710295205 A CN 201710295205A CN 108793665 A CN108793665 A CN 108793665A
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- sludge
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- stalk
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/48—Solid fuels essentially based on materials of non-mineral origin on industrial residues and waste materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment Of Sludge (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses the applications of a kind of processing method of cold rolling oil-containing waste water biological sludge and processing product, and this method comprises the following steps：1) it is, that the stalk that length is 0.5~2cm is spiked into biological sludge by the adding proportion of 5-10% by mass percentage；2), by the way of drying predrainage, so that the moisture content of the biological sludge after addition stalk is dropped to≤20%, be then added in gasification furnace, gasification process is carried out to biological sludge, moisture content and part volatile organic matter are removed, makes sludge drying and easily mill, gasification condition is as follows：Temperature：250~350 DEG C, coefficient of excess air：0.2-0.6, reaction time：10~30min；3), the sludge after gasification process is mixed into thermal coal, after milling be used as blast furnace blowing solid fuel in or power plants generating electricity solid fuel.
Description
Technical field
The present invention relates to a kind of processing method of waste more particularly to a kind of processing of cold rolling oil-containing waste water biological sludge
And the utilization method of processing product.
Background technology
In the prior art, the diluted alkaline oily waste water of the emulsion and cold rolling alkali cleaning generation that are generated for iron and steel enterprise's cold rolling
Water first uses the techniques such as air supporting, neutralization and filtering to be pre-processed, then with bioanalysis biochemical treatment (such as MBR) qualified discharge afterwards,
This biochemical process water process generates biological sludge, is mainly characterized by moisture content height, general moisture content > 80%；Content of organics
Height, the general > 40% (butt) of total carbon content；Butt higher calorific value is high, general > 5000kcal/kg；It is mainly iron in inorganic matter
Salt and aluminium salt.
And it is as follows for the main treatment technology and feature of high organic matter sludges：
1), burning method：Although it is thorough to burn organic matter removal, there are prebake, stink, burning ash and incineration slag are difficult for it
To utilize, the shortcomings of flue gas need to go up control techniques；
2), anaerobic process：Anaerobic fermentation generates biogas, this process cleans, but that there are fermentation times is long, and fermentation residue is difficult to be utilized
The shortcomings that.
3), moulded coal：Drying and moulded coal processing are carried out as fuel as the key component of moulded coal after drying,；And dry and
Moulded coal processing cost is higher and there are problems that secondary pollution；
4), cement kiln collaboration utilizes:Cement kiln collaboration, but will across factory transport and exist need to using being a preferable method
The pretreated disadvantage of desiccation, while the processing of cement kiln flue gas can also be added and be born.
Invention content
Technical problem to be solved by the present invention lies in providing, one kind is simple for process, operation is more convenient, can be in sludge
The processing method of cold rolling oil-containing waste water biological sludge that is utilized effectively of organic and inorganic component.
Its technical problem to be solved can be implemented by the following technical programs.
A kind of processing method of cold rolling oil-containing waste water biological sludge, includes the following steps：
Biological sludge is first added into a certain size stalk according to a certain percentage, by the way of drying predrainage, makes it
Moisture content drops to≤20%, is then added in gasification furnace, right under certain temperature, coefficient of excess air and reaction time
Sludge carries out hypothermia and hypoxia gasification process, removes moisture content and part volatile organic matter, makes sludge drying and easily mill.
Biological sludge moisture content itself is big, and because being the sludge that oily waste water biological treatment generates, viscosity is strong, adopts
High with normative heat treatment dehydration energy, dehydration is more difficult；And the gas permeability of sludge can be then improved by adding stalk, keep sludge de-
Water is easy.Preferably, the adding proportion of stalk is 5-10% (mass percent), and the length of stalk is 0.5~2cm, select at
The stalk air-dried after ripe harvesting, moisture content are generally less than 30%, its moisture content is relatively low in this way, reduce gasification energy consumption, also allow for
The mixing of sludge and stalk improves its gas permeability.
Certain temperature is controlled using gasification process, on the one hand gasification reaction is enable to carry out, and desiccation and removal part are volatilized
Property organic matter, make sludge grindability improve；Temperature is excessively high organic matter gasification can be made to become combustible fumes after drain, keep certain
Temperature make in sludge organic matter more be retained in sludge to be used as solid fuel.Coefficient of excess air is controlled to be based on similarly
Reason, because excessively high coefficient of excess air can make oxidation operation in sludge become CO or CO2With flue gas emission, and air mistake
Surplus coefficient is too low, does not have the effect of part organics removal.Control certain reaction time realization desiccation and part removal volatilization
Property organic matter effect, is further added by that the time is meaningless to desiccation, and excessive volatile organic matter can be caused to become combustible gas.
General gasification process parameter is：250~350 DEG C of temperature (preferably 280~320 DEG C), coefficient of excess air 0.2-0.6, when reaction
Between be 10~30min.
Another technical problem to be solved by this invention is to provide the application of two kinds of above-mentioned processing method products therefroms.
That is, the sludge of gasification process is directly added into Iron Works injection coal or power plants generating electricity thermal coal, with coal one
It rises levigate by blast furnace or the existing coal pulverizer of power plant, is mixed in coal dust and enters blast furnace or boiler of power plant and be used as solid fuel.
Wherein, after gasification sludge incorporation pulverized coal injection into blast furna or power plant's thermal coal reason for this is that, whole process iron and steel enterprise is general
Have blast furnace or power plant for self-supply, using facility collaboration processing in factory with convenient operation and management, processing cost is low and not will produce two
The advantages of secondary sludge；Inorganic component in this biological sludge is mainly aluminium and iron, one of blast furnace slag and plant slag Main Components
For aluminium, the temperature of blast furnace and boiler of power plant is high, its melting activation can be made to become clinker and be used as with the inorganic matter in recycling sludge
Building materials, especially blast furnace utilize also recyclable iron.The another aspect blast furnace and existing coal measures of power plant is under unified central planning coal pulverizer, gasification process
Sludge is mixed into without special processing in existing coal afterwards.
The present invention provides a kind of processing of cold rolling oil-containing waste water biological sludge and method is utilized, innovatively adding stalk makes
The predrainage of sludge and subsequent gasification reaction are easy to carry out, and using the method for low temperature gasification, make sludge drying and easily mill, and
So that most of organic carbon is reserved for solid fuel, it is often more important that using integrated iron and steel works blast furnace ironmaking or from
Standby boiler of power plant power generation process cooperates with recycling sludge, on the one hand using the carbon in sludge as fuel, on the other hand utilizes height
The inorganic matter in high-temperature fusion processing sludge in stove or electricity generation boiler, so that it becomes active slag utilizes so as to building materials.
Compared with prior art, the present invention having the advantages that：
1, after low temperature gasification processing, gaseous pollutant can return blast furnace with qualified discharge, sludge or boiler of power plant utilizes, due to
Blast furnace and boiler of power plant have gas cleaning measure, and entire technical process can not upper special gaseous pollutant purifier.
2, the full dose digestibility and utilization of sludge is realized：Carbon in sludge is used as fuel, and inorganic matter becomes clinker, into building materials
Material utilization.
3, gasification process is environmental-friendly compared with working processes such as moulded coals.
Description of the drawings
Fig. 1 is the basic flow chart of processing method of the present invention and application；
Specific implementation mode
The specific implementation mode of the present invention is described in further detail below in conjunction with attached drawing.
Include mainly that stalk is mixed into biological dirt as shown in Figure 1, for treatment method and the basic procedure step of application
The step of predrainage and gasification process in mud and to biological sludge, finally the sludge after gasification process is mixed with thermal coal
Thermal coal coal pulverizer application of the grinding as solid fuel together directly through blast furnace or power plant scene afterwards.It is specific real below
Apply example.
Embodiment 1：
The biological sludge that one cold rolling oil-containing waste water biochemical treatment generates, moisture content 80.1%, total carbon content 47.5%
(butt), butt higher calorific value 6544kcal/kg, total iron content 18.7% (butt), the aluminium content 32.3% in terms of oxide are (dry
Base)；This sludge adds 9% (weight percent) 1.5cm wheat stalks, is passed through after 150 DEG C of steam desiccation using rotary kiln to containing
Water rate 10.2% is sent into kiln gas gasifier by screw feeder, and it is 320 DEG C of temperature, sky to control technological parameter in gasification furnace
Gas coefficient of excess is 0.5, reaction time 15min；The sludge main chemical compositions of discharge be TC 40.2%, TFe22.5%,
Aluminium is with oxide (Al2O3) it is calculated as 36.2%, moisture content is closely zero, this gasification process sludge is directly mixed in pulverized coal injection into blast furna,
With injection coal through the existing injection flour mill grinding of blast furnace, and blast furnace is sprayed into coal dust, the inorganic matter in sludge is through height
Building materials utilize after high-temperature fusion reaction in stove more than 1500 DEG C becomes blast furnace slag.
Embodiment 2：
The biological sludge that one cold rolling oil-containing waste water biochemical treatment generates, moisture content 85.8%, total carbon content 44.2%
(butt), butt higher calorific value 6243kcal/kg, total iron content 8.5% (butt), the aluminium content 46.3% in terms of oxide are (dry
Base)；This sludge adds 7% (weight percent) 1cm wheat stalks, is passed through after 160 DEG C of heat smoke desiccation using rotary kiln to containing
Water rate 18.5% is sent into kiln gas gasifier by screw feeder, and it is 300 DEG C of temperature, sky to control technological parameter in gasification furnace
Gas coefficient of excess is 0.4, reaction time 20min；The sludge main chemical compositions of discharge be TC 37.4%, TFe10.2%,
Aluminium is with oxide (Al2O3) it is calculated as 48.2%, moisture content is closely zero, this gasification process sludge residue is directly mixed in power plant's power
In coal, with thermal coal through the existing coal pulverizer grinding of power plant, and boiler of power plant power generation, the nothing in sludge is added with coal dust
Machine object building materials after the high-temperature fusion reaction that boiler of power plant is more than 1000 DEG C becomes clinker utilize.
Embodiment 3：
The biological sludge that one cold rolling oil-containing waste water biochemical treatment generates, moisture content 88.6%, total carbon content 35.4%
(butt), butt higher calorific value 4643kcal/kg, total iron content 15.7% (butt), the aluminium content 38.3% in terms of oxide are (dry
Base)；This sludge adds 6% (weight percent) 0.6cm wheat stalks, is passed through after 170 DEG C of steam desiccation using rotary kiln to containing
Water rate 19.6% is sent into kiln gas gasifier by screw feeder, and it is 280 DEG C of temperature, sky to control technological parameter in gasification furnace
Gas coefficient of excess is 0.3, reaction time 30min；The sludge main chemical compositions of discharge be TC 34.6%, TFe17.35%,
Aluminium is with oxide (Al2O3) meter 45.2%, moisture content is closely zero, this gasification process sludge residue is directly mixed in pulverized coal injection into blast furna
In, with injection coal through the existing injection flour mill grinding of blast furnace, and blast furnace is sprayed into coal dust, the inorganic matter warp in sludge
Building materials utilize after high-temperature fusion reaction in blast furnace more than 1500 DEG C becomes blast furnace slag.
Claims (10)
1. a kind of processing method of cold rolling oil-containing waste water biological sludge, which is characterized in that include the following steps：
1) it is, that the stalk that length is 0.5~2cm is spiked into biological sludge by the adding proportion of 5-10% by mass percentage；
2), by the way of drying predrainage, so that the moisture content of the biological sludge after addition stalk is dropped to≤20%, be then added
Into gasification furnace, gasification process is carried out to biological sludge, makes sludge drying and easily mill, gasification condition is as follows：
Temperature：250~350 DEG C,
Coefficient of excess air：0.2-0.6,
Reaction time：10~30min；
3), the sludge after gasification process is mixed into thermal coal, solid fuel is used as after coal pulverizer grinding.
2. the processing method of cold rolling oil-containing waste water biological sludge according to claim 1, which is characterized in that the stalk be at
The stalk air-dried after ripe harvesting.
3. the processing method of cold rolling oil-containing waste water biological sludge according to claim 2, which is characterized in that the stalk contains
Water rate is less than 30%.
4. the processing method of cold rolling oil-containing waste water biological sludge according to claim 1, which is characterized in that the temperature in step 2)
Degree is 280~320 DEG C.
5. a kind of application of cold rolling oil-containing waste water biological sludge, which is characterized in that include the following steps：
1) it is, that the stalk that length is 0.5~2cm is spiked into biological sludge by the adding proportion of 5-10% by mass percentage；
2), by the way of drying predrainage, so that the moisture content of the biological sludge after addition stalk is dropped to≤20%, be then added
Into gasification furnace, gasification process is carried out to biological sludge, makes sludge drying and easily mill, gasification condition is as follows：
Temperature：250~350 DEG C,
Coefficient of excess air：0.2-0.6,
Reaction time：10~30min；
3), the sludge after gasification process is mixed into pulverized coal injection into blast furna, is sprayed as solid fuel after injection coal coal pulverizer grinding
Enter blast furnace.
6. application according to claim 5, which is characterized in that the moisture content of the stalk is less than 30%.
7. application according to claim 5, which is characterized in that the temperature in step 2) is 280~320 DEG C.
8. a kind of application of cold rolling oil-containing waste water biological sludge, which is characterized in that include the following steps：
1) it is, that the stalk that length is 0.5~2cm is spiked into biological sludge by the adding proportion of 5-10% by mass percentage；
2), by the way of drying predrainage, so that the moisture content of the biological sludge after addition stalk is dropped to≤20%, be then added
Into gasification furnace, gasification process is carried out to biological sludge, makes sludge drying and easily mill, gasification condition is as follows：
Temperature：250~350 DEG C,
Coefficient of excess air：0.2-0.6,
Reaction time：10~30min；
3), the sludge after gasification process is mixed into power plants generating electricity thermal coal, is fired as solid after thermal coal coal pulverizer grinding
Boiler of power plant is added in material.
9. application according to claim 8, which is characterized in that the moisture content of the stalk is less than 30%.
10. application according to claim 8, which is characterized in that the temperature in step 2) is 280~320 DEG C.
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Cited By (3)
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| CN111100959A (en) * | 2019-12-16 | 2020-05-05 | 山东钢铁股份有限公司 | Method for improving combustion rate of granulated coal for blast furnace injection by using self-produced oil sludge of iron and steel plant |
| CN111100960A (en) * | 2019-12-16 | 2020-05-05 | 山东钢铁股份有限公司 | Method for improving combustion rate of pulverized coal for blast furnace injection by utilizing self-produced oil sludge of iron and steel plant |
| CN115286207A (en) * | 2022-08-17 | 2022-11-04 | 无锡德林海环保科技股份有限公司 | Mud drying method |
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