CN109574429A - A kind of method of heavy metal in solidifying oil sludge - Google Patents
A kind of method of heavy metal in solidifying oil sludge Download PDFInfo
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- CN109574429A CN109574429A CN201910114969.4A CN201910114969A CN109574429A CN 109574429 A CN109574429 A CN 109574429A CN 201910114969 A CN201910114969 A CN 201910114969A CN 109574429 A CN109574429 A CN 109574429A
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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
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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
- C02F11/02—Biological treatment
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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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
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- General Engineering & Computer Science (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of methods of heavy metal in solidifying oil sludge, greasy filth is pre-processed by chemical conditioning method first, flocculant is added after pretreatment, then the dewatering system to be formed is combined using dehydration equipment, mechanical dehydration is carried out to greasy filth, by the moisture control of greasy filth between 80%-85%；Dewatered greasy filth is conveyed into hybrid reaction to fill, curing agent is added using dry powder chemical feed machine, semi-solid preparation greasy filth is conveyed through screw conveyor, curing reaction tank is entered using the solidifying oil sludge that screw conveyor conveys, curing agent is added into curing reaction tank simultaneously, the method for heavy metal in this solidifying oil sludge of the present invention, after making oily sludge pass through solidification, be conducive to petroleum chemical enterprise to reduce disposal costs, reduce cost, be more advantageous to petroleum chemical enterprise to the resource utilization of oily sludge.
Description
Technical field
The invention belongs to oil-sludge treatment technical fields, and in particular to a kind of method of heavy metal in solidifying oil sludge.
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, innoxious, recycling principle, be realized
Rationally effectively processing and disposition are current urgent problems to be solved to oily sludge.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of that present invention to provide heavy metals in a kind of solidifying oil sludge
Method.
The technical scheme adopted by the invention is as follows: a kind of method of heavy metal in solidifying oil sludge, comprising the following steps:
(1) mechanical dehydration: first pre-processing greasy filth by chemical conditioning method, and flocculant is added after pretreatment, then
The dewatering system to be formed is combined using dehydration equipment, mechanical dehydration is carried out to greasy filth, by the moisture control of greasy filth in 80%-
Between 85%.Oily sludge includes complicated ingredient, and water content is big, should be pre-processed before mechanical dehydration, after pretreatment
Sludge be in flow-like, the sludge of flow-like enters mechanical dehydration system.
The purpose of mechanical dehydration is to form semi-solid preparation greasy filth, conducive to the conveying of the screw conveyor of next step.
(2) it mixes: step (1) dewatered greasy filth being conveyed into hybrid reaction and is filled, adds solidification using dry powder chemical feed machine
Agent stirs the mixture of greasy filth and curing agent while adding curing agent, forms greasy filth with curing agent hybrid reaction aqueous
Rate is the semi-solid preparation greasy filth of 30%-50%.
(3) helical feed: semi-solid preparation greasy filth in step (2) is conveyed through screw conveyor, enters spiral transferring from feed inlet
The conveyor chamber of machine is sent, solidifying oil sludge is pushed by the blade normal direction of screw conveyor, and solidifying oil sludge is axially moved along the hopper of blade
It is dynamic.
(4) curing reaction tank: curing reaction tank is entered using the solidifying oil sludge in screw conveyor supplying step (3), together
When add curing agent into curing reaction tank, solidifying oil sludge is taken out out of curing reaction tank, naturally stack 48 hours, by solidified oil
Mud is transported to processing unit and is burned.
Pretreated method is also critically important, and pretreated method includes: to take lime, is ground by disintegrating apparatus to lime,
Greasy filth is mixed with the lime after grinding, is added water and stirred during mixing, mixture is made, mixture is placed on reaction
Tanning is heated in kettle, so that the free sulfur in greasy filth is converted into polysulfide, the mixture after conversion is taken out from reaction kettle.
The preparation element of flocculant includes: starch, cellulose, chitosan and acrylamide.Starch, cellulose, shell are gathered
Sugar carries out graft copolymerization with acrylamide and flocculant is made.
In mechanical dewatering stage, dewatering system include the elevator pump set gradually, vacuum filter, dehydrated raw material tank,
It is dehydrated feed pump, dehydrating tower, circulating pump and heat exchanger, greasy filth enters vacuum filter by elevator pump, then from vacuum filter
Into dehydrated raw material tank, greasy filth enters dehydrating tower by dehydration feed pump, and dehydrating tower connects heat exchanger, and heat exchanger is equipped with circulation
Pump.
In mixing step, using special curing agent, curing agent the preparation method is as follows: by biological enzyme curing agent water
Dilution 20-50 times, add mass ratio for 6-8% solid CaCl2 and 6-8% acidified sodium silicate, be heated to 40-45 DEG C it
Between, reaction time 30-45min.
For the greasy filth for realizing fixed moisture content, the medium position of curing reaction tank is equipped with the sensing of measurement greasy filth moisture content
Device, sensor connect moisture content display instrument, can effectively control moisture content.
Wherein, the selection of screw conveyor should be able to guarantee the effect of semi-solid preparation greasy filth conveying, the conveying of screw conveyor
Environment temperature is 0~20 DEG C, and angle of inclination beta≤15 ° of conveyer, delivered length is generally less than 20m.
In the curing reaction tank the step of, the curing agent added in curing reaction tank is composite curing agent, mainly by solidifying
Agent pulvis and curing agent liquor composition.
Above-mentioned curing agent pulvis is mainly by the material composition of following parts by weight: 2~5 parts of cement, activated steel slag powder 1~2
Part, 2~4 parts of quick lime and 1~2 part of phosphate, 0.1-0.2 parts of sodium sulphate, 0.3-0.4 parts of ferric sulfate, soil bacteria 0.1-0.2
Part, 0.3-0.5 parts of aluminum sulfate, 0.2-0.3 parts of alumina silicate, 0.3-0.4 parts of calcium sulfate, curing agent liquor are waterglass.Solidify powder
Agent is mainly based on specific ash content, including certain proportion sodium sulphate, ferric sulfate, soil bacteria, aluminum sulfate, alumina silicate, calcium sulfate,
Wherein ash content effect is absorption sorption, and moisture regulation and hydration curing reaction can also be normally carried out, wherein aluminum sulfate, silicic acid
Aluminium, calcium sulfate play the role of capture to heavy metal, and sodium sulphate, ferric sulfate, soil bacteria play positive solidification to heavy metal.
The method of heavy metal in this solidifying oil sludge of the present invention, modified effect is good, simple process, equipment operation at
This low, wide adaptability, does not generate secondary sludge, heavy metal stabilization, is that a kind of oily sludge is innoxious, depth decrement
Change, the technical method of resource utilization, after so that oily sludge is passed through solidification, is conducive to petroleum chemical enterprise and reduces disposal costs, reduce
Cost is more advantageous to petroleum chemical enterprise to the resource utilization of oily sludge.
Specific embodiment
Following described embodiments are some of the embodiments of the present invention, instead of all the embodiments, is merely to illustrate
The present invention, and be not construed as limiting the scope of the invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.In embodiment
The person that is not specified actual conditions, carries out according to conventional conditions or manufacturer's recommended conditions.Production is not specified in agents useful for same or instrument
Manufacturer person is the conventional products that can be obtained by commercially available purchase.
Embodiment 1
The method of heavy metal mainly includes mechanical dehydration, mixing, helical feed, curing reaction tank and a huge sum of money in solidifying oil sludge
Category processing.
Mechanical dehydration: first pre-processing greasy filth by chemical conditioning method, flocculant is added after pretreatment, then use
Dehydration equipment combine the dewatering system to be formed to greasy filth carry out mechanical dehydration, by the moisture control of greasy filth 80%-85% it
Between.It generally requires and is pre-processed before mechanical sludge dewatering, main purpose is to improve its dewatering, reduces operating cost；
Pretreatment main method has chemical conditioning method, heat treating process, freezing and elutriation method etc., general using the chemistry for adding flocculant
Conditioning method, dewatering machine equipment according to different dewatering Principles generally have belt filter press, vacuum filter, centrifugal dehydrator,
Folded spiral shell dewaterer etc.；After mechanical dehydration, the moisture content of oily sludge can drop to 80%.
Oily sludge includes complicated ingredient, and water content is big, should be pre-processed before mechanical dehydration, pretreated
Sludge is in flow-like, and the sludge of flow-like enters mechanical dehydration system.
The purpose of mechanical dehydration is to form semi-solid preparation greasy filth, conducive to the conveying of the screw conveyor of next step.
Dewatering system include the elevator pump set gradually, vacuum filter, dehydrated raw material tank, dehydration feed pump, dehydrating tower,
Circulating pump and heat exchanger, greasy filth enters vacuum filter by elevator pump, then enters dehydrated raw material tank, greasy filth from vacuum filter
Enter dehydrating tower by being dehydrated feed pump, dehydrating tower connects heat exchanger, and heat exchanger is equipped with circulating pump.Dewatering system is using conventional
A kind of new processing system for being combined with heat source thermal dehydration technology of mechanical dehydration, the removal efficiency of moisture up to 99% or more,
May finally by oily sludge water and greasy filth be kept completely separate.With treatment effeciency height, dehydration is thorough, operating condition is slow
With the special advantage such as heating and dewatering speed be fast, land occupation is few, and treatment effeciency is stablized.
The preparation element of flocculant includes: starch, cellulose, chitosan and acrylamide.Starch, cellulose, shell are gathered
Sugar carries out graft copolymerization with acrylamide and flocculant is made.Being made for flocculant is by starch, cellulose, chitosan and acryloyl
Amine carries out graft copolymerization, as on hemicellulose molecule chain, connects a kind of or several synthetic polymer branch flexible
What chain and " sanction " came out.
Pretreated method includes: to take lime, is ground by disintegrating apparatus to lime, greasy filth and the lime after grinding are mixed
It closes, is added water and stirred during mixing, mixture is made, mixture is placed into heating in a kettle and is boiled, is made in greasy filth
Free sulfur be converted into polysulfide, the mixture after conversion is taken out from reaction kettle.Take out the material after boiling in reaction kettle
Material completes pretreatment, in preprocessing process, generates more vulcanizations by reacting lime, water and plasticine model waste material jointly
Object, and then effectively prevent the sulfide in the treatment process in later period and be thermally generated sulfur dioxide gas, while in order to
It converts the free sulfur in plasticine model waste material completely, the usage ratio of lime, water and plasticine model waste material is controlled.
The present invention increases process in the preprocessing process to waste material, that is, can avoid subsequent generation sulfur dioxide gas.
Mixing: being conveyed into hybrid reaction for dewatered greasy filth and fill, add curing agent using dry powder chemical feed machine, solid adding
The mixture that greasy filth and curing agent are stirred while agent makes greasy filth and curing agent hybrid reaction form moisture content 30%-
50% semi-solid preparation greasy filth.After mechanical dehydration, the oily sludge that moisture content is 80% or so enters hybrid system, passes through dry powder
Chemical feed machine adds high-efficiency curing agent, and constantly stirring is mediated during adding, and keeps oily sludge and high-efficiency curing agent sufficiently mixed
It closes, reaction.
Curing agent the preparation method is as follows: biological enzyme curing agent is diluted with water 20-30 times, adding mass ratio is 6%
Solid CaCl2 and 6% acidified sodium silicate, be heated between 40 DEG C, reaction time 30min.The curing agent solidification effect
It is good, after being diluted with water using existing biological enzyme curing agent, if plus dilutional hyponatremia if influence solidification effect, the CaCl2 being added and
The amount of acidified sodium silicate is very few to directly affect solidification effect, even solidification failure.In addition, time and the reaction time mistake of heating
It is short all to influence solidification effect.
Helical feed: semi-solid preparation greasy filth being conveyed through screw conveyor, the conveyor chamber of screw conveyor is entered from feed inlet,
Solidifying oil sludge is pushed by the blade normal direction of screw conveyor, and solidifying oil sludge is moved axially along the hopper of blade.After cured
Oily sludge is transported to curing reaction tank through screw conveyor；Oily sludge is added from feed inlet, when the spindle is rotated, contains greasy dirt
Effect of the mud by helical blade normal thrust, the frictional force of the radial component and blade of the thrust to oily sludge, it is possible to
The reason of gravity and hopper to the frictional force of oily sludge with oily sludge pivoting, but due to itself, Cai Buyu
Helical blade rotates together, and under the effect of the axial thrust load of blade normal thrust, it is moved axially along hopper.
Wherein, the selection of screw conveyor should be able to guarantee the effect of semi-solid preparation greasy filth conveying, the conveying of screw conveyor
Environment temperature is 0~20 DEG C, and angle of inclination beta≤15 ° of conveyer, delivered length is generally less than 20m.
The selection of screw conveyor should be able to guarantee the effect of semi-solid preparation greasy filth conveying, the transport environment temperature of screw conveyor
Degree is 5 DEG C, inclination maximum β=5 ° of conveyer, delivered length 5m-15m.The delivery temperature of screw conveyor is low, and greasy filth is hard
It is good to change effect, is conducive to convey, the inclination angle of conveyer and delivered length can be depending on the needs of scene.
Curing reaction tank: entering curing reaction tank using screw conveyor conveying solidifying oil sludge, while to curing reaction tank
Interior addition curing agent, takes out solidifying oil sludge out of curing reaction tank, stacks 48 hours naturally, solidifying oil sludge is transported single to processing
Member is burned.After oily sludge after the addition high-efficiency curing agent of helical feed enters reactor tank, stack 48 hours naturally；Through anti-
Oily sludge after answering transports next processing unit landfill or burns.
The medium position of curing reaction tank is equipped with the sensor of measurement greasy filth moisture content, and sensor connects moisture content display instrument
Table.
The curing agent added in curing reaction tank is composite curing agent, mainly by curing agent pulvis and curing agent liquor group
At.Sludge modification curing agent is different from traditional curing agent or dehydrating agent, and this product, which carries out chemical modification to sludge, makes its mud knot
Structure is changed, and the principle of molecule aggregation is used using macromolecule polymeric material, is activated the molecule in sludge colloidal solid, is made it
It is converted into soil particle structure with the molecule aggregation in modifying agent, sludge completes soil process.
For the greasy filth for realizing fixed moisture content, the medium position of curing reaction tank is equipped with the sensing of measurement greasy filth moisture content
Device, sensor connect moisture content display instrument, can effectively control moisture content.
In the curing reaction tank the step of, the curing agent added in curing reaction tank is composite curing agent, mainly by solidifying
Agent pulvis and curing agent liquor composition.
Embodiment 2
The embodiment the difference from embodiment 1 is that, curing agent the preparation method is as follows: biological enzyme curing agent water is dilute
40 times are released, the acidified sodium silicate for the solid CaCl2 and 7% that mass ratio is 7% is added, is heated between 45 DEG C, the reaction time
For 40min.The curing agent solidification effect is good, after being diluted with water using existing biological enzyme curing agent, if plus dilutional hyponatremia if influence
Solidification effect, 40 times of dilution can reach best dilution effect, and the very few direct shadow of amount of CaCl2 and acidified sodium silicate is added
Solidification effect is rung, even solidification failure, but be added and excessively also will affect solidification, keep solidification uneven, which is used
Amount be the optimal amount of curing agent solidification effect.In addition, the temperature of heating uses 45 °, it is substance that the reaction time, which uses 40min,
Activity highest is reacted most fast, is achieved the effect that best.
Embodiment 3
The embodiment the difference from embodiment 1 is that, curing agent the preparation method is as follows: biological enzyme curing agent water is dilute
50 times are released, the acidified sodium silicate for the solid CaCl2 and 8% that mass ratio is 8% is added, is heated between 45 DEG C, the reaction time
For 45min.The embodiment curing agent solidification effect is preferable, and the curing agent solidification effect of the component ratio embodiment 1 is good.The reason is that
After biological enzyme curing agent is using more solution dilution, better water dilution is provided for solid CaCl2 and acidified sodium silicate, is being propped up
During supportting curing agent, it is good to be formed by activated curing agent effect, after greasy filth is added in this kind of curing agent, can be improved solidification effect
Rate.
The curing agent is usually used in preparing road surface base layer material, then adds polypropylene fibre and be uniformly mixed so as to obtain road surface base layer material.
It is applied to greasy filth solidification, the solid solidifying oil sludge in surface can be obtained, provides the foundation to greasy filth conveying.With certain viscosity
Greasy filth can not normally be conveyed in screw conveyor, can be bonded on helical blade, occur conveying blocking.
Embodiment 4
Curing agent pulvis by following parts by weight material composition: 3 parts of cement, 1~2 part of activated steel slag powder, 2 parts of quick lime and
2 parts of phosphate, curing agent liquor is waterglass.Cement and quick lime answer compound certain weight ratio, make to solidify pulvis reach compared with
Good effect.Phosphatic relative fractions improve, and make bond effect more preferably.
Embodiment 5
Curing agent pulvis by following parts by weight material composition: 4 parts of cement, 1~2 part of activated steel slag powder, 3 parts of quick lime and
2 parts of phosphate, curing agent liquor is waterglass.Cement and quick lime answer compound certain weight ratio, make to solidify pulvis reach compared with
Good effect.It bonds best with hardening effect.
Embodiment 6
Curing agent pulvis by following parts by weight material composition: 5 parts of cement, 1~2 part of activated steel slag powder, 4 parts of quick lime and
2 parts of phosphate, curing agent liquor is waterglass.Cement and quick lime answer compound certain weight ratio, make to solidify pulvis reach compared with
Good effect.Hardening effect is good, and bond effect is not so good as embodiment 4, but is more advantageous to the conveying of screw conveyor.
Curing agent is applied to repair the greasy filth by heavy metal pollution, can be persistently effectively by the heavy metal contaminants in greasy filth
Solidification and stabilization has the advantages that repairing effect is good and stability is strong.
The method of heavy metal in this solidifying oil sludge of the present invention is that a kind of oily sludge is innoxious, depth decrement
Change, the technical method of resource utilization, main purpose is to solidify oily sludge, and solidify ash content effect in pulvis: absorption is inhaled
, moisture regulation and hydration curing reaction can be normally carried out；Aluminum sulfate, alumina silicate, calcium sulfate capture heavy metal, sulphur
Sour sodium, ferric sulfate, soil bacteria play positive solidification for heavy metal.Sludge does not generate secondary sludge after modified, disappears
Except stench, sewage sludge harmlessness, stabilisation and recycling are realized.Sludge modification curing agent feature: modified effect is good, simple process,
Equipment operating cost is low, and wide adaptability does not generate secondary sludge, heavy metal stabilization.Be conducive to petroleum chemical enterprise and reduce disposition expense
With, reduce cost, be more advantageous to petroleum chemical enterprise to the resource utilization of oily sludge.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is all to fall into the claims in the present invention confining spectrum
Technical solution, be within the scope of the present invention.
Claims (10)
1. a kind of method of heavy metal in solidifying oil sludge, it is characterised in that: the following steps are included:
(1) mechanical dehydration: first pre-processing greasy filth by chemical conditioning method, flocculant is added after pretreatment, then use
Dehydration equipment combine the dewatering system to be formed to greasy filth carry out mechanical dehydration, by the moisture control of greasy filth 80%-85% it
Between；
(2) it mixes: step (1) dewatered greasy filth being conveyed into hybrid reaction and is filled, adds curing agent using dry powder chemical feed machine,
The mixture that greasy filth and curing agent are stirred while adding curing agent makes greasy filth and curing agent hybrid reaction form moisture content
The semi-solid preparation greasy filth of 30%-50%；
(3) helical feed: semi-solid preparation greasy filth in step (2) is conveyed through screw conveyor, enters screw conveyor from feed inlet
Conveyor chamber, solidifying oil sludge by screw conveyor blade normal direction push, solidifying oil sludge along blade hopper move axially.
(4) curing reaction tank: entering curing reaction tank using the solidifying oil sludge in screw conveyor supplying step (3), while to
Curing agent is added in curing reaction tank, solidifying oil sludge is taken out out of curing reaction tank, stacks 48 hours naturally, solidifying oil sludge is transported
Transport to processing unit burning.
2. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: using the pre- place of chemical conditioning method
Steps are as follows for reason: taking lime, is ground by disintegrating apparatus to lime, greasy filth is mixed with the lime after grinding, in mixed mistake
It is added water and stirred in journey, mixture is made, mixture is placed into heating in a kettle and is boiled, the free sulfur in greasy filth is converted into
Polysulfide takes out the mixture after conversion from reaction kettle.
3. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: the flocculant is mainly by forming sediment
Powder, cellulose, chitosan and acrylamide are made of the method for graft copolymerization.
4. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: the dewatering system includes successively
The elevator pump of setting, vacuum filter, dehydrated raw material tank, dehydration feed pump, dehydrating tower, circulating pump and heat exchanger, greasy filth pass through
Elevator pump enters vacuum filter, then enters dehydrated raw material tank from vacuum filter, and greasy filth enters dehydration by dehydration feed pump
Tower, dehydrating tower connect heat exchanger, and heat exchanger is equipped with circulating pump.
5. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: the preparation method of the curing agent
It is as follows: biological enzyme curing agent being diluted with water 20-50 times, adds the acid of solid CaCl2 and 6-8% that mass ratio is 6-8%
Change waterglass, is heated between 40-45 DEG C, reaction time 30-45min.
6. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: the middle part of the curing reaction tank
Position is equipped with the sensor of measurement greasy filth moisture content, and sensor connects moisture content display instrument.
7. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: the conveying of the screw conveyor
Environment temperature is 0~20 DEG C, and angle of inclination beta≤15 ° of conveyer, delivered length is generally less than 20m.
8. the method for heavy metal in solidifying oil sludge as described in claim 1, it is characterised in that: that adds in curing reaction tank consolidates
Agent is composite curing agent, is mainly made of curing agent pulvis and curing agent liquor.
9. the method for heavy metal in solidifying oil sludge as claimed in claim 8, it is characterised in that: the curing agent pulvis include with
The material composition of lower parts by weight: 2~5 parts of cement, 1~2 part of activated steel slag powder, 2~4 parts of quick lime and 1~2 part of phosphate.
10. the method for heavy metal in solidifying oil sludge as claimed in claim 8, it is characterised in that: the curing agent liquor is water
Glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114969.4A CN109574429A (en) | 2019-02-14 | 2019-02-14 | A kind of method of heavy metal in solidifying oil sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114969.4A CN109574429A (en) | 2019-02-14 | 2019-02-14 | A kind of method of heavy metal in solidifying oil sludge |
Publications (1)
| Publication Number | Publication Date |
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| CN109574429A true CN109574429A (en) | 2019-04-05 |
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| CN110143747A (en) * | 2019-06-13 | 2019-08-20 | 大连理工大学环境工程设计研究院有限公司 | A kind of processing system for black and odorous river bed mud recycling |
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| CN116730661A (en) * | 2023-03-13 | 2023-09-12 | 常熟理工学院 | Method for converting oil sludge into solidified soil |
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| CN110255857B (en) * | 2019-05-28 | 2021-12-14 | 路德环境科技股份有限公司 | Low-alkali conditioner for deep dehydration of building slurry and dehydration method |
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