CN109761470A - A kind of oily sludge minimizing processing method - Google Patents
A kind of oily sludge minimizing processing method Download PDFInfo
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- CN109761470A CN109761470A CN201711075498.8A CN201711075498A CN109761470A CN 109761470 A CN109761470 A CN 109761470A CN 201711075498 A CN201711075498 A CN 201711075498A CN 109761470 A CN109761470 A CN 109761470A
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- oily sludge
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Abstract
The invention discloses a kind of oily sludge minimizing processing method, the present invention includes mechanical dehydration, quenched, low temperature desiccation；The present invention is so that moisture content is dropped to 80% or so after mechanical dehydration in the greasy filth of high-moisture percentage；Dewatered greasy filth is quenched by adding efficient adjusting material progress, and the sticky property of greasy filth is changed after quenched, is allowed to the more discrete particles become, so that minimizing degree reaches best；After greasy filth and medicament come into full contact with, oil water mixture is transferred together to be adsorbed on huge surface, is more conducive to volatilizing；And efficiently adjusting material being capable of heavy metals such as copper, zinc, cadmium, mercury, Cr VI, arsenic and not anti-molten effectively in quenched greasy filth, Leaching of Heavy Metals is thoroughly eliminated to threaten, realize sewage sludge harmlessness, and promote the generation of solid solution by physical-chemical reaction, it is effectively prevent the precipitation of heavy metal ion, without secondary pollution；Oily sludge after quenched enters low temperature desiccation machine, is packaged, transports outward, burns after low temperature desiccation.
Description
Technical field
The present invention relates to contained Mud Treatment Technology fields, more particularly to a kind of processing side that can be used for oily sludge minimizing
Method.
Background technique
Petrochemical industry sludge is also known as petroleum chemical enterprise's " three mud " (oil separator bed mud, floation tank dross and residual active sludge),
A large amount of organic matter, hydro carbons, oils are usually contained, moisture content is high, bulky.Oil storage tank bed mud in petroleum chemical enterprise's " three mud ",
Oil separator bed mud and floation tank dross belong to oily sludge, these oily sludges composition is different.Oily sludge is one by petroleum
Hydro carbons, colloid, asphalitine, silt particle, inorganic wadding body, organic wadding body, water and other organic matters, inorganic matter secure bond are together
Emulsification system.According to " the National Hazard waste register " of issuing and implementation in 2016, oily sludge belongs to hazardous waste, and classification is
HW08.Residual active sludge derives from biochemical wastewater treatment unit, is one kind by organic substance relic, microorganism, inorganic particulate
The extremely complex heterogeneous body of the compositions such as grain and colloid.The residual active sludge that petroleum chemical enterprise generates is put into " hazardous waste
Exempt management inventory ", but also need to ascertain whether to belong to danger according to the hazardous waste judging standard and discrimination method of national regulation
Dangerous waste.Currently, the residual active sludge that most petroleum chemical enterprises generate still is used as hazardous waste to be managed and dispose.
Environmental protection technology it is relatively advanced, it is environmentally friendly manage the developed countries that more standardize, sludge realizes sludge substantially
Minimizing, innoxious and recycling disposition.Developed countries mainly use minimizing and innoxious carry out landfill
Processing mode, some petroleum chemical enterprises realize the resource utilization of sludge using technologies such as pyrolysis, burning, comprehensive utilizations.Phase
Than for developed country, petrochemical enterprise in China sludge is mostly outer committee's processing after concentration, filters pressing.It entrusts outside sludge high processing
Expense brings heavy financial burden to enterprise, and as petroleum chemical enterprise's production capacity is continuously improved, quantity of wastewater effluent is continuously improved, dirty
The yield of mud is increasing, and petroleum chemical enterprise will also face bigger economic pressures.Importantly, without disposition is effectively treated,
Secondary pollution, direct threatening environment safety and public health easily are caused to underground water, soil etc., make the ring of sewage treatment facility
Border benefit substantially reduces.Disposal of oily sludge must be followed strictly with disposition, minimizing, recycling principle, realize contain greasy dirt
Rationally effectively processing and disposition are current urgent problems to be solved to mud.
Summary of the invention
Oily sludge minimizing refers to through the means using physics, chemistry, biochemistry, so that entire sewage disposal system is to outlet
The biosolids amount put reaches minimum.The Sludge Reduction Technologies for fundamentally reducing sludge quantity are more and more weighed extensively
Depending on, while the research of Sludge Reduction Technologies is also to realize the necessary ways of recycling sludge.Treatment of Sludge and disposition must be stringent
Follow, minimizing, recycling principle, mud decrement be turned to disposition emphasis, sludge resource is turned to developing goal, only
There is realization comprehensive utilization of mud, could fundamentally solve pollution of the sludge to environment.
Aqueous four classes that are roughly divided into of institute in sludge: Interstitial Water, capillary combination water, surface adsorption water, internal water.The first claims
For " Free water ", latter three kinds are known as " irreducible water ".These four water can be physically other than filters pressing in addition to Interstitial Water, Qi Tasan
There is kind water surface powerful negative electron to be wrapped in, it cannot be precipitated with physics filters pressing.Intergranular Interstitial Water accounts for about sludge weight
The 70% of amount；Capillary water, the capillary water between mud granule, accounts for about 20%；The absorption water and particle internal water of particle account for about 10%,
The object of sludge dewatering is intergranular Interstitial Water, and why sludge contains a large amount of water, other than Interstitial Water, is separately had very big by one
It is partly due to what the structure of its particle surface characteristic and sludge group was determined.Mud granule adsorption has various charged ions
And the extracellular polymeric etc. secreted in its metabolic process by microorganism in cells in vitro forms.These charged ions and cell
Outer polymer has very strong specific retention.These mud granules constitute sludge group, form various capillary channels, sludge
The water in water and capillary channel that particle surface is held all is in conjunction with water, and this irreducible water is cannot to be removed with simple Mechanical Method
Fall.Object of the present invention is to provide a kind of solution oil-containing greasy filth during oil-sludge treatment to overcome the shortcomings of above-mentioned prior art
The oil-sludge treatment method of depth minus quantization, resource utilization is unable to because of oil-containing；
The method of the present invention is:
(1) mechanical dehydration；After mechanical dehydration, the moisture content of oily sludge can drop to 80% or so；
(2) quenched；After mechanical dehydration, the oily sludge that moisture content is 80% enters tempering system, and adds efficient adjusting material,
Continuous stirring is mediated simultaneously, and oily sludge is made to be sufficiently mixed, react with efficient adjusting material；
(3) helical feed；Oily sludge after conditioned is transported to low temperature desiccation machine through screw conveyor；
(4) low temperature desiccation；Low temperature desiccation machine is using steam, hot water, hot oil etc. as heat medium, to the oily sludge after conditioned
Low temperature desiccation is carried out, the entire drying process of material carries out in the closed state, and volatile organic gas and gas with foreign flavor are closed
It send under atmosphere to exhaust gas processing device, avoids environmental pollution.
Specific embodiment
The present invention relates to a kind of oily sludge depth Reduction Technology methods, and main purpose is that oily sludge is made to pass through depth minus
After amount, be conducive to petroleum chemical enterprise and reduce disposal costs, reduce cost, is more advantageous to petroleum chemical enterprise to the recycling benefit of oily sludge
With；
The method of the present invention is:
(1) mechanical dehydration；It generally requiring and is pre-processed before mechanical sludge dewatering, main purpose is to improve its dewatering,
Reduce operating cost；Mechanical dehydration is used after pretreatment, and the moisture content of oily sludge is allow to drop to 80% or so；
(2) quenched；After mechanical dehydration, the oily sludge that moisture content is 80% enters tempering system, and adds efficient adjusting material,
Continuous stirring is mediated simultaneously, and oily sludge is made to be sufficiently mixed, react with efficient adjusting material；
(3) helical feed；Oily sludge after conditioned is transported to low temperature desiccation machine through screw conveyor；Oily sludge is from charging
Mouth is added, when the spindle is rotated, effect of the oily sludge by helical blade normal thrust, the radial component and blade of the thrust
To the frictional force of oily sludge, oily sludge pivoting can be made, but gravity due to itself and hopper are to oily sludge
The reason of frictional force, Cai Buyu helical blade rotate together, and under the effect of the axial thrust load of blade normal thrust, along hopper
Axial movement；
(4) low temperature desiccation；Low temperature desiccation machine by intermeshing two to four paddle shafts, the W-shaped shell with collet, base with
And running part composition, the entire drying process of material carry out in the closed state, volatile organic gas and gas with foreign flavor are close
It closes under atmosphere and send to exhaust gas processing device, avoid environmental pollution；Desiccation machine with steam, hot water or conduction oil as heat medium,
Drive shaft both ends are equipped with the rotary joint that thermal medium imports and exports.Heat medium is divided into two-way, respectively enters desiccation machine shell folder
Set and paddle shaft inner cavity, body and paddle shaft are heated simultaneously, are carried out in a manner of conduction heating to oily sludge heating and drying.
Oily sludge is quantitatively delivered continuously to the feed opening of desiccation machine by feed screw, after oily sludge enters body, passes through paddle
The rotation of leaf makes its overturning, stirring, constantly updates heating interface, contacts, be sufficiently heated with body and blade, make contained by it
Surface moisture evaporation.Meanwhile oily sludge is conveyed with the helical trajectory that is rotated into of paddle shaft to discharge port direction, is relayed in conveying
Continuous stirring, makes the moisture oozed out in sludge continue to evaporate.Finally, the uniform qualified products of desiccation are discharged by discharge port.
Claims (5)
1. a kind of oily sludge minimizing processing method, feature the following steps are included:
(1) mechanical dehydration；It generally requiring and is pre-processed before mechanical sludge dewatering, main purpose is to improve its dewatering,
Reduce operating cost；It is general to use the chemical conditioning method for adding flocculant；Then after mechanical dehydration, the moisture content of oily sludge
80% or so can be dropped to；
(2) quenched；After mechanical dehydration, the oily sludge that moisture content is 80% enters tempering system, and adds efficient adjusting material,
Continuous stirring is mediated simultaneously, and oily sludge is made to be sufficiently mixed, react with efficient adjusting material；
(3) helical feed；Oily sludge after conditioned is transported to low temperature desiccation machine through screw conveyor；Oily sludge is from charging
Mouth is added, when the spindle is rotated, effect of the oily sludge by helical blade normal thrust, the radial component and blade of the thrust
To the frictional force of oily sludge, oily sludge pivoting can be made, but gravity due to itself and hopper are to oily sludge
The reason of frictional force, Cai Buyu helical blade rotate together, and under the effect of the axial thrust load of blade normal thrust, along hopper
Axial movement；
(4) low temperature desiccation；Low temperature desiccation machine by intermeshing two to four paddle shafts, the W-shaped shell with collet, base with
And running part composition, the entire drying process of material carry out in the closed state, volatile organic gas and gas with foreign flavor are close
It closes under atmosphere and send to exhaust gas processing device, avoid environmental pollution；Desiccation machine with steam, hot water or conduction oil as heat medium,
Shaft end is equipped with the rotary joint that thermal medium imports and exports；Heat medium is divided into two-way, respectively enters desiccation machine shell collet and paddle
Rachis inner cavity heats body and paddle shaft simultaneously, is carried out in a manner of conduction heating to oily sludge heating and drying；Containing greasy dirt
Mud is quantitatively delivered continuously to the feed opening of desiccation machine by feed screw, after oily sludge enters body, passes through turning for blade
It is dynamic to make its overturning, stirring, heating interface is constantly updated, contacts, is sufficiently heated with body and blade, make the surface water contained by it
Divide evaporation；Meanwhile oily sludge is conveyed with the helical trajectory that is rotated into of paddle shaft to discharge port direction, continues to stir in conveying
It mixes, the moisture oozed out in sludge is made to continue to evaporate；Finally, the uniform qualified products of desiccation are discharged by discharge port.
2. oily sludge minimizing processing method as described in claim 1, it is characterized in that high-moisture percentage is contained greasy dirt first
Mud makes moisture content drop to 80% or so after passing through mechanical dehydration.
3. oily sludge minimizing processing method as described in claim 1, it is characterized in that entering through dewatered oily sludge
Tempering system carries out oily sludge quenched by adding efficient adjusting material.
4. oily sludge minimizing processing method as described in claim 1, it is characterized in that the oily sludge after conditioned is by spiral shell
Rotation conveyer is transported to low temperature desiccation machine.
5. oily sludge minimizing processing method as described in claim 1, it is characterized in that oily sludge is dry through low temperature desiccation machine
Change, depth minimizing heel row goes out.
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| CN201711075498.8A CN109761470A (en) | 2017-11-06 | 2017-11-06 | A kind of oily sludge minimizing processing method |
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| US4881473A (en) * | 1984-12-03 | 1989-11-21 | Atlantic Richfield Company | Method and apparatus for treating oil-water-solids sludges and refinery waste streams |
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