CN105906175A - Treatment method and treatment device of oil sludge sand - Google Patents
Treatment method and treatment device of oil sludge sand Download PDFInfo
- Publication number
- CN105906175A CN105906175A CN201610288828.0A CN201610288828A CN105906175A CN 105906175 A CN105906175 A CN 105906175A CN 201610288828 A CN201610288828 A CN 201610288828A CN 105906175 A CN105906175 A CN 105906175A
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- sand
- oil
- sludge
- oil sludge
- water
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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
- C02F11/12—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
-
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- 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
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
Abstract
The invention discloses a treatment method of oil sludge sand. The treatment method includes adopting natural high polymer compound components to modify the oil sludge sand, and specifically includes following steps: step 1, placing the oil sludge sand in water to obtain a diluted water body containing an oil-sludge mixture; step 2, dissolving a modifying agent in the diluted water body to obtain a water solution; step 3, stirring the water solution, standing for the water solution to be stratified into light oil on the upper layer, a clear water phase on the middle layer and modified sludge containing heavy oil on the lower layer; step 4, collecting overflow of the light oil on the upper layer; dewatering the oil sludge containing the heavy oil on the lower layer through a mechanical dewatering method to obtain a sludge cake. By modifying the sludge, the treatment method jumps out of a strong circle depending on conventional sludge-removing agent polymer polyacrylamide (PAM), and water content is remarkably lowered in a dewatering link, so that energy consumption during subsequent sludge drying can be reduced, and fixed investment and other related operation expenses can be lowered. The invention further discloses a treatment device of the oil sludge sand.
Description
Technical field
The present invention relates to the processing method of a kind of oil sludge and sand.The invention still further relates to the processing means of a kind of oil sludge and sand.
Background technology
Oil exploitation has resulted in the soil pollution of area of China about 3%, and in " 13 " period and follow-up, oil is opened
Adopt produced oil sludge and sand to carry out separation and burn harmless treatment work, then can not the most arbitrarily stack, fill
Dispose, and historical reasons pile up old oil sludge and sand in the environment, it is also necessary to progressively clear up.
Substantial amounts of oil sludge and sand can be deposited bottom the crude oil storage tank of Oil production sites, oil sludge and sand by heavy oil, a small amount of light oil, earth,
Sands etc. form, and need periodic cleaning, disposal.
It is oil, mud, sand separation to be come that oil sludge and sand processes optimal target.The first step that oil sludge and sand is disposed is to be added by steam
Hot aeration mode, separates sand, removes the poly-mixture of oil that top produces.But, the water that front end steam aeration produces
Contain a large amount of greasy filth mutually to be difficult to process, and oil field all uses polymer poly acrylamide (PAM) DP technology, due to PAM's
Existing, there is Water-In-Oil, oil-in-water labyrinth in greasy filth, causes a large amount of heavy oil mud in aqueous phase to be difficult to deposition dehydrating, shape
The moisture content of the cake become, more than 85%, causes transportation evaporating, emitting, dripping or leaking of liquid or gas, and incineration disposal energy consumption is big, and cost is high.
Summary of the invention
The technical problem to be solved is to provide the processing method of a kind of oil sludge and sand, and it can reduce subsequent sludge drying
Energy consumption, reduces fixed investment and other relevant running costs.
For solving above-mentioned technical problem, the technical solution of the processing method of oil sludge and sand of the present invention is, uses natural polymer multiple
Combo is divided oil sludge and sand is carried out modifying process, comprises the following steps:
The first step, is invested in oil sludge and sand in water, obtains the dilution water body containing sludge mixture；
Before oil sludge and sand is invested in water, can first oil sludge and sand be pre-processed；The method of described pretreatment is: by steaming
Most parts of sand in vapour aeration mode removing oil sludge and sand and a part poly-mixture of oil.
The weight ratio of oil sludge and sand and water is between 1:2 to 1:20.
Second step, by modifying process medicament dissolution in dilution water body, obtains the aqueous solution；
Described modifying process medicament at least includes that natural polymer compounds component, crane span structure reagent, pH adjusting agent；
Described natural polymer compounds component and the percent by volume diluting water body is 1 ‰～5 ‰.
Described natural polymer compounds component and includes polysaccharide, protein, polypeptide.
Described crane span structure reagent is the one in bodied ferric sulfate, polymeric ferric aluminum, aluminium polychloride, calcium oxide, calcium hydroxide or many
Kind；Described crane span structure reagent place cation total concentration is between 1mmol/L～20mmol/L.
Described pH adjusting agent is one or more in calcium oxide, calcium hydroxide, NaOH, potassium hydroxide；By controlling
The usage amount of pH adjusting agent, makes the pH value of the aqueous solution control between 7～13.
3rd step, is stirred the aqueous solution, stands rear solution layering, and upper strata is light oil；Middle level is clear water phase；
Lower floor be modification after containing heavy oil mud；
Described stirring means is mechanical agitation or aeration agitation.
4th step, by the light oil overflow collection on upper strata；By mechanical dehydration method, the mud containing heavy oil of lower floor is dehydrated,
To mud cake.
Described mechanical dehydration method is vacuum filtration, pressure filtration, centrifugation, screw extruding filtration, plate and frame press filtration, belt
One in press filtration.
The present invention also provides for the processing means of a kind of oil sludge and sand, and its technical solution is:
Including settling tank 1, being provided with mixing plant 2 in settling tank 1, settling tank 1 connects medicine machine by drug feeding pipeline；Heavy
The top in fall pond 1 connects light oil tank 3 by pipeline, and the middle part of settling tank 1 connects clear water reserviors 4 by pipeline, settling tank 1
Bottom connects the entrance of mechanical dewatering equipment 5 by pipeline, and the filtrate (liquid of mechanical dewatering equipment 5 connects muddy water pond by pipeline
6, the cake outlet of mechanical dewatering equipment 5 connects mud cake processing means 7.
What the present invention can reach has the technical effect that
The present invention, by modifying mud, jumps out the vicious circle relying on tradition desliming agent polymer poly acrylamide (PAM),
Moisture content is just significantly reduced by dehydration link, it is possible to reduce the energy consumption of subsequent sludge drying, reduces fixed investment and other relevant fortune
Working cost.
Natural polymer of the present invention compounds component with substantial amounts of functional groups, has three-dimensional synergy, at bridge
Under the effect of frame reagent cationic, in suitable pH value range, by " bridging ", " electrically neutralizing " and chemical reaction,
By ionic bond, hydrogen bond, Van der Waals force, adsorb multiple particle simultaneously, produce between particle and build bridge, it is possible to make consolidating of difficult degradation
Body suspended particle, somatic cells and colloid net are caught in three dimensional network structure, thus aggegation rapidly, clearly separate with aqueous phase.
The present invention utilizes natural polymer to compound component and crane span structure reagent, the mating reaction of pH adjusting agent, it is possible to containing heavy oil mud
Produce obvious modification effect, by centrifugal or filter-press dehydration, the mud formed than common flocculant such as PAM, aluminium polychloride etc.
Cake moisture content low at least 10%, convenient outward transport burning, the energy consumption of the follow-up burning dry mud of harmless treatment unit is substantially reduced, and
The treating capacity of unit volume incinerator unit interval can increase, and subsequent treatment efficiency is greatly improved.
The isolated aqueous phase of present invention institute is limpid, and solid content is low, can repeatedly use.
In the processing method of the present invention, the consumption of crane span structure reagent and pH adjusting agent is less than the 20% of conventional method consumption.
The technique of the present invention is simple, low for equipment requirements, it is not necessary to heating, as long as water body does not freezes.
Accompanying drawing explanation
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the schematic diagram of the processing means of sewage disposal solid waste of the present invention.
Description of reference numerals in figure:
1 is settling tank, and 2 is mixing plant,
3 is light oil tank, and 4 is clear water reserviors,
5 is mechanical dewatering equipment, and 6 is muddy water pond,
7 is mud cake processing means.
Detailed description of the invention
The processing method of oil sludge and sand of the present invention, uses natural polymer to compound component and oil sludge and sand is carried out modifying process, including following
Step:
The first step, is invested in oil sludge and sand in water, obtains the dilution water body containing sludge mixture；
The weight ratio of oil sludge and sand and water is between 1:2 to 1:20；
This oil sludge and sand is the deposit in the crude oil storage tank of Oil production sites；
Oil sludge and sand directly can be invested in water；First oil sludge and sand can also be pre-processed, be invested in the most again in water；
Pretreatment can be by the most parts of sand in steam aeration mode removing oil sludge and sand and a part poly-mixture of oil；
Second step, by modifying process medicament dissolution in dilution water body, obtains the aqueous solution；
Modifying process medicament at least includes that natural polymer compounds component, crane span structure reagent, pH adjusting agent；
Wherein, natural polymer compounds component and the percent by volume diluting water body is 1 ‰～5 ‰；
Natural polymer compounds component and includes the components such as polysaccharide, protein, polypeptide；
Crane span structure reagent includes one or more in bodied ferric sulfate, polymeric ferric aluminum, aluminium polychloride, calcium oxide, calcium hydroxide；
Crane span structure reagent place cation total concentration is between 1mmol/L～20mmol/L；
PH adjusting agent includes calcium oxide, calcium hydroxide, NaOH, potassium hydroxide etc.；
By controlling the usage amount of pH adjusting agent, the pH value of the aqueous solution is made to control between 7～13；
3rd step, is stirred the aqueous solution, stands rear solution layering, and upper strata is C2～C4 light oil；Middle level is limpid
Aqueous phase, enters clear water reserviors 4, the repeatable utilization of this aqueous phase；Lower floor be modification after containing heavy oil mud；
Stirring means can use mechanical agitation or aeration agitation；
4th step, by the light oil overflow collection on upper strata；The repeatable utilization of middle level aqueous phase, it is also possible to for washed-out sand；By machinery
The mud containing heavy oil of lower floor is dehydrated by evaporation, obtains mud cake；The muddy water that desliming produces enters muddy water pond 6；
Mechanical dehydration method can be vacuum filtration, pressure filtration, centrifugation, screw extruding filtration, plate and frame press filtration, belt
The modes such as press filtration.
The mud cake proterties of gained of the present invention changes, and moisture content is less than 75%, and the mud cake volume of its volume ratio more than 85% moisture content is little very
Many, will not evaporating, emitting, dripping or leaking of liquid or gas, conveniently outward transport disposal.
Natural polymer of the present invention compounds component and can degrade voluntarily, non-secondary pollution problem, to humans and animals without any
Side effect.
The present invention uses the processing means of oil sludge and sand as shown in Figure 1, including settling tank 1, is provided with stirring and sets in settling tank 1
Standby 2, settling tank 1 connects medicine machine by drug feeding pipeline；Measuring pump can be set in drug feeding pipeline, it is achieved quantitatively to determining body
Dosing in long-pending dilution aqueous phase；
The top of settling tank 1 connects light oil tank 3 by pipeline, and the middle part of settling tank 1 connects clear water reserviors 4, sedimentation by pipeline
The bottom in pond 1 connects the entrance of mechanical dewatering equipment 5 by pipeline；Mechanical dewatering equipment 5 is provided with two outlets, one of them
For filtrate (liquid, another is cake outlet；The filtrate (liquid of mechanical dewatering equipment 5 connects muddy water pond 6, machinery by pipeline
The cake outlet of dehydration equipment 5 connects mud cake processing means 7；
Mixing plant 2 includes that agitator arm, agitator arm are arranged at the bottom of rotary shaft, and the top of rotary shaft connects driving motor；
Drive motor that rotary shaft can be driven to rotate, thus drive agitator arm to be stirred in settling tank 1.
Embodiment 1:
Certain oil extraction in oil field produces oil sludge and sand
This oil sludge and sand has generality and representativeness in China, processes currently without good way, and treatment effeciency is the lowest, special
A large amount of water bodys of producing after desanding and the poly-mixture of oil due to or containing heavy oil, polymer, Shao Liangsha, mud, be difficult to
Dispose, only will contain heavy oil mud and after water clearly separates, the just convenient mud subsequent treatment in heavy oil, and water can reuse,
Without the water containing heavy oil mud through repeatedly utilizing Hou Yekequ oil field sewage treatment plant to dispose.Use the process technique of the present invention,
Less than 75% can will be reduced to containing the moisture content of heavy oil mud.
Technological process: early stage is according to oil sludge and sand: the part by weight mixed diluting of water=1:3, gross weight is 4 tons, passes through steam
Aeration removes major part sand and the poly-mixture of oil；The middle natural polymer that successively adds containing heavy oil sludge water body compounds component, polymerization
Ferric sulfate, calcium hydroxide, wherein natural polymer compounds component is 1 ‰ (percents by volume), and bodied ferric sulfate closes iron total concentration
4.5mmol/L, by calcium hydroxide regulation pH value to 7.5；Mechanical agitation 5min；After standing 40min, scrape off upper strata light oil,
Intermediate layer clear water discharges washed-out sand, and lower floor's mud in heavy oil is dehydrated by horizontal screw centrifuge.
Result: detect through third party, the moisture content of the cake 75% produced containing heavy oil mud；Greasy filth through range estimation, mud cake and initial stage
Sand form is completely different, is no longer pasty state viscous slurry, it is easy to transport, incineration disposal.
Embodiment 2:
Certain oil field left over by history ageing oil silt particle
This ageing oil silt particle is long due to ageing time, and hardenability is high, the most difficult, it is necessary first to pulverized by ageing oil silt particle thin
Change, then dilute immersion with water according to a certain percentage, finally dispose according to the process technique of new oil sludge and sand.
Technological process: taking ageing oil silt particle and 900g water that 100g pulverizes, mixed dissolution, in 1L beaker, is sufficiently stirred for；First
Rear addition natural polymer compounds component, bodied ferric sulfate, calcium hydroxide, and wherein natural polymer compounds component 1.2 ‰ (body
Long-pending percentage), bodied ferric sulfate closes iron total concentration 6mmol/L, by calcium hydroxide regulation pH value to 7.5；Mechanical agitation 2min；
Stand 40min；Lower sediment is dehydrated by vacuum filtration mode.
Result: drying and be dried before and after the heaviest, after suction filtration mode is dehydrated, moisture content of the cake is 75%；Filter cake is honeycomb cracks,
Color is become brown from black, illustrates to modify effect obvious.
Claims (10)
1. the processing method of an oil sludge and sand, it is characterised in that use natural polymer to compound component and oil sludge and sand is modified
Process, comprise the following steps:
The first step, is invested in oil sludge and sand in water, obtains the dilution water body containing sludge mixture；
Second step, by modifying process medicament dissolution in dilution water body, obtains the aqueous solution；
Described modifying process medicament at least includes that natural polymer compounds component, crane span structure reagent, pH adjusting agent；
3rd step, is stirred the aqueous solution, stands rear solution layering, and upper strata is light oil；Middle level is clear water phase；
Lower floor be modification after containing heavy oil mud；
4th step, by the light oil overflow collection on upper strata；By mechanical dehydration method, the mud containing heavy oil of lower floor is dehydrated,
To mud cake.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: oil sludge and sand is invested in by the described first step
Before in water, first oil sludge and sand is pre-processed；The method of described pretreatment is: by steam aeration mode removing oil sludge and sand
Most parts of sand and a part oil poly-mixture.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: oil sludge and sand and water in the described first step
Weight ratio be between 1:2 to 1:20.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: described natural polymer compounds component
It is 1 ‰～5 ‰ with the percent by volume of dilution water body.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: described natural polymer compounds component
Including polysaccharide, protein, polypeptide.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: described crane span structure reagent is polyaluminum sulfate
One or more in iron, polymeric ferric aluminum, aluminium polychloride, calcium oxide, calcium hydroxide；Described crane span structure reagent place cation
Total concentration is between 1mmol/L～20mmol/L.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: described pH adjusting agent be calcium oxide,
One or more in calcium hydroxide, NaOH, potassium hydroxide；By controlling the usage amount of pH adjusting agent, make the aqueous solution
PH value controls between 7～13.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: the stirring means of described 3rd step is
Mechanical agitation or aeration agitation.
The processing method of oil sludge and sand the most according to claim 1, it is characterised in that: the mechanical dehydration in described 4th step
Method is the one in vacuum filtration, pressure filtration, centrifugation, screw extruding filtration, plate and frame press filtration, belt press filtration.
10. the processing means of an oil sludge and sand, it is characterised in that include settling tank, is provided with mixing plant in settling tank, heavy
Fall pond connects medicine machine by drug feeding pipeline；The top of settling tank connects light oil tank by pipeline, and the middle part of settling tank is passed through
Pipeline connects clear water reserviors, and the bottom of settling tank connects the entrance of mechanical dewatering equipment by pipeline, and the filtrate of mechanical dewatering equipment goes out
Mouth connects muddy water pond by pipeline, and the cake outlet of mechanical dewatering equipment connects mud cake processing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288828.0A CN105906175A (en) | 2016-05-03 | 2016-05-03 | Treatment method and treatment device of oil sludge sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288828.0A CN105906175A (en) | 2016-05-03 | 2016-05-03 | Treatment method and treatment device of oil sludge sand |
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| CN105906175A true CN105906175A (en) | 2016-08-31 |
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| CN201610288828.0A Pending CN105906175A (en) | 2016-05-03 | 2016-05-03 | Treatment method and treatment device of oil sludge sand |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773961A (en) * | 2018-07-12 | 2018-11-09 | 安徽美源生态科技有限公司 | A kind of black and odorous water reparation stereoscopic purification device |
| CN111421104A (en) * | 2020-04-19 | 2020-07-17 | 蓝仙松 | Waste molding sand grading desliming equipment |
| CN113121075A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Treatment method for polymer-containing oil sludge sand |
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| CN103420552A (en) * | 2013-08-29 | 2013-12-04 | 海盐海利废塑回收处理有限公司 | Method for processing oily sludge |
| CN103663778A (en) * | 2013-11-16 | 2014-03-26 | 克拉玛依市金山石油化工有限公司 | Method for realizing oily sludge reduction through pre-oxidation-sludge recycling |
| CN205710354U (en) * | 2016-05-03 | 2016-11-23 | 上海幸使环保科技有限公司 | The processing means of oil sludge and sand |
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2016
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Patent Citations (3)
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| CN103420552A (en) * | 2013-08-29 | 2013-12-04 | 海盐海利废塑回收处理有限公司 | Method for processing oily sludge |
| CN103663778A (en) * | 2013-11-16 | 2014-03-26 | 克拉玛依市金山石油化工有限公司 | Method for realizing oily sludge reduction through pre-oxidation-sludge recycling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773961A (en) * | 2018-07-12 | 2018-11-09 | 安徽美源生态科技有限公司 | A kind of black and odorous water reparation stereoscopic purification device |
| CN113121075A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Treatment method for polymer-containing oil sludge sand |
| CN111421104A (en) * | 2020-04-19 | 2020-07-17 | 蓝仙松 | Waste molding sand grading desliming equipment |
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