CN105984988A - System and technique for recovering calcium salts from heavy oil field exploitation waste liquid - Google Patents

System and technique for recovering calcium salts from heavy oil field exploitation waste liquid Download PDF

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Publication number
CN105984988A
CN105984988A CN201610301086.0A CN201610301086A CN105984988A CN 105984988 A CN105984988 A CN 105984988A CN 201610301086 A CN201610301086 A CN 201610301086A CN 105984988 A CN105984988 A CN 105984988A
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waste liquid
heavy oil
oil field
calcium salt
solution
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李研
程婧
张庭云
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Tianjin Haiweiou Energy Technology Co Ltd
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Tianjin Haiweiou Energy Technology Co Ltd
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/20—Halides
    • C01F11/24—Chlorides
    • C01F11/32—Purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/36—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C07C51/412—Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218—Crystallization
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The invention relates to a system and technique for recovering calcium salts from a heavy oil field exploitation waste liquid. The major equipment comprises a filter, a mixing reactor, a concentrator, a crystallizer, a solid-liquid separator, a dryer and a plurality of pumps. The technique mainly comprises the following steps: chemical settling, filtering, crystallizing and drying. The technique can recover high-value mineral salts from the waste liquid generated in the oil sand treatment process. The technique solves the problem of treatment of the waste liquid after extraction, can obtain high-added-value chemical products, increases the economic benefit, and reduces the environmental pollution.

Description

A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid
Technical field
The invention belongs to technical field of chemical separation, relate to a kind of exploitation from heavy oil field and waste liquid reclaims calcium salt System and method, be specifically related to use chemical settling, filter, crystallize, solid-liquid separation and dry method will be useless In liquid different minerals matter composition recycle processing system and method.
Background technology
Heavy oil field (e.g., oil-sand, oil shale, landing oil, greasy filth etc.) be a kind of by mink cell focus (or Colophonium), The grains of sand, clay and the complex mixture of a small amount of water composition.Because its process is huge, it is increasingly becoming a kind of standby Petroleum resources.As a example by oil-sand, its proved reserves account for about 2/3rds of existing petroleum resources total amount, existing Have technologically recoverable reserves to be about 651,000,000,000 barrels, be mainly distributed on Canada, Venezuela, the U.S., Russia, The ground such as Indonesia and China, are a kind of very promising substitute energy source for petroleums.
Classifying according to mineral composition, mink cell focus can be divided mainly into silicates and carbonate type.Open at present Adopt comparative maturity is to use WATER-WASHING METHOD to exploit the mink cell focus (such as oil-sand) of silicate types, takes as added The oil-sand exploitation in Albertus Magnus area.And the mink cell focus for carbonate type is exploited the most fewer, mainly Owing to the mink cell focus of this type is general and mineral has stronger active force, and make WATER-WASHING METHOD poor effect. Use acid wash to process this type of heavy oil field, effectively mineral component therein can be dissolved, and not affect The quality of mink cell focus, can preferably play the effect efficiently carrying oil.But, face one of this technology is important to be asked Topic is: have substantial amounts of waste liquid to produce in production process.The analysis found that, rich in calcium, magnesium, ferrum etc. in waste liquid Metal ion, in order to reach the purpose that environmental protection produces, increases economic efficiency, it is necessary to produced above-mentioned simultaneously Waste liquid in journey carries out processing to reclaim useful component therein.
Summary of the invention
It is an object of the invention to solve acid wash and process waste water produced by heavy oil field, it is provided that be a kind of low Cost, high efficiency, continuous, environmental protection, and may be used for the system and method that heavy oil field pickling separation is on-the-spot.
The present invention is realized by following equipment and technical scheme:
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, it is characterised in that: heavy oil field Separate the waste liquid produced or mine tailing uses chemical settling, filtering and impurity removing, crystallization, solid-liquid separation, dry successively Different minerals matter composition is reclaimed in method classification from heavy oil field exploitation waste liquid, and described heavy oil field separates generation Waste liquid be all kinds of carbonate heavy oil field after pickling, or solvent extraction solid residue through the mine tailing of overpickling Or waste liquid.
And, involved heavy oil field is the heavy oil such as oil-sand, oil shale, greasy filth, landing oil and mineral Mixture.
And, described chemical settling is to react generation precipitation by addition alkaline solution in solution.
And, described alkaline solution be sodium hydroxide solution, potassium hydroxide solution, ammonia spirit, lime water or Other alkaline solutions of person.
And, after the pH of the waste liquid after adding alkali is more than 5, stop the addition of alkali liquor.
And, described crystallization process is evaporative crystallization.
And, handled pickle waste liquid is for using waste liquid produced by organic or inorganic acid.
And, the acid of described pickling is the monoacid such as acetic acid, hydrochloric acid, nitric acid, formic acid or hydrobromic acid.
A kind of technique reclaiming calcium salt from the waste liquid that the separation of heavy oil field produces, step is as follows:
(1) the oil-sand after heavy oil field processes processes mine tailing and adds neutralization reactor, first reacts with alkali liquor, extremely Till tan precipitate is complete, generates solidliquid mixture, solidliquid mixture input filter, pass through in filter Filtration step, separates solid residue from solution；
(2) after filtering, the filtrate calcium salt soln of gained then inputs and concentrates to concentrator；Gained after concentration Supersaturated solution be delivered to crystallizer in crystallize, the steam of generation reclaims, and gained solidliquid mixture leads to Cross centrifugal or suspension formula solid-liquid separator and carry out solid-liquid separation；
(3) the solid crystal particles obtained from solid-liquid separator is packed after drying through exsiccator, and from solid-liquid separation Device separating obtained calcium salt supersaturated solution circulation be then back in concentrator；When impurity content in supersaturated solution After reaching certain level, use the mode of separatory when returning in concentrator, by a part of calcium salt supersaturated solution Outer row, to reduce impurities accumulation.
And, described supersaturated solution may return on the pipeline of filtration, shape after mixing with the solution after filtration Become calcium salt soln mixed solution to enter back into concentrator to concentrate.
The unique distinction following points of the present invention:
1, the present invention uses the mode that classification is reclaimed, in the waste liquid produced in recovery mink cell focus separation process not Same mineral composition, effectively solves the environmental problems such as tailings glass, turns waste into wealth；
2, the present invention uses the method that the chemical agent being conveniently easy to get carries out chemical precipitation, improves final calcium salt Purity, the most easy to operate simply, and remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is that the present invention is a kind of separates the system flow chart reclaiming calcium salt the waste liquid produced from heavy oil field
Stock number: 1. oil-sand processes mine tailing；2. alkali liquor；3. solidliquid mixture；4. solid residue；5. calcium Saline solution I；6. calcium salt soln II；7. steam；；8. supersaturation calcium salt soln；9. crystal-supersaturation is molten Liquid mixture；10. calcium salt supersaturated solution (circulation)；11. calcium salt supersaturated solutions (row outward)；12. is brilliant Body granule；13. steam；14. crystal products.
Device is numbered: A. neutralization reactor；B. filter；C. concentrator；D. crystallizer；E. solid-liquid Separator；F. exsiccator.
Detailed description of the invention
The invention provides a kind of system for reclaiming calcium salt from the waste liquid that heavy oil field separation process produces And method, this separation method uses physics and Chemical Decomposition method, in the waste liquid produce oil-sand separation process The classification of various mineral compositions is reclaimed, and not only solves waste water and dregs and discharges the pollution problem caused, it is also possible to band Carry out considerable economic benefit.Described mink cell focus exploitation waste liquid is all kinds of carbonate heavy oil field through pickling, dry Evaporate mine tailing or the waste liquid etc. of the solid residue pickling after overpickling or solvent extraction of rear solid.
The core apparatus reclaiming calcium salt and side-product from oil-sand separation waste liquid is reactor, filter and crystallizer. The waste liquid produced from heavy oil field processing procedure, is first added thereto to alkali liquor and reacts, and produces precipitation；Again Filter operation is used to be separated by solid-liquid；After separation, remaining filtrate is calcium salt soln, and filtrate is through concentrating Crystallize in rear entrance crystallizer；Crystal and supersaturated solution separate through centrifugal separation equipment, obtain The crystal obtained becomes calcium salt product through dried, and supersaturated solution is then back to concentrator circulation.
Of the present invention from heavy oil field exploitation waste liquid, reclaim the system of calcium salt and technique includes following device: Neutralization reactor, filter, concentrator, crystallizer, solid-liquid separator, exsiccator and some conveying equipments.
Its concrete operation step is as follows:
(1) the oil-sand (using the mine tailing after acid treatment) after heavy oil field processes processes mine tailing 1 and adds neutralization reaction Device A, first reacts with alkali liquor 2, to tan precipitate completely, generate solidliquid mixture 3, solid-liquid is mixed Compound 3 input filter, through filtration step in filter B, separates solid residue 4 from solution Out；Solid residue include the heavy metallic salts such as ferrum, nickel, manganese and the grains of sand or other be not dissolved in acid impurity；
(2) after filtering, the filtrate calcium salt soln 5 of gained then inputs and concentrates to concentrator C；Concentrate The supersaturated solution 8 of rear gained crystallizes in being delivered to crystallizer D, and the steam 7 of generation reclaims, institute Obtain solidliquid mixture and carry out solid-liquid separation by centrifugal or suspension formula solid-liquid separator E；
(3) the solid crystal particles 12 obtained from solid-liquid separator is packed after drying through exsiccator F, and from solid The separating obtained calcium salt supersaturated solution 10 of liquid/gas separator circulates, and is back in concentrator；Work as supersaturated solution After middle impurity content reaches certain level (impurity content 0.1%), use the side of separatory when returning in concentrator Formula, by a part of outer row of calcium salt supersaturated solution 11, to reduce impurities accumulation.
(4), on the pipeline that supersaturated solution 10 may return to, after mixing with the solution 5 after filtration, form calcium salt Solution mixed solution 6 enters back into concentrator C and concentrates.
Handled by the present invention mink cell focus exploitation waste liquid be carbonate heavy oil field after pickling, dry distilling pickling or The mine tailing of solid residue pickling or waste liquid etc. after person's solvent extraction；And its corresponding acid used includes: organic or nothing Machine acid, such as acetic acid, hydrochloric acid, nitric acid, formic acid, hydrobromic acid etc.；
The alkali liquor that the present invention uses includes such as potassium hydroxide solution, ammonia, sodium hydroxide solution or lime aqueous solution Deng solution.
The concrete operation step of process implementing:
The waste liquid produced from heavy oil field processing procedure, with a certain amount of alkali liquor in entrance neutralization reactor A Carrying out reaction precipitation, regulate pH > 5, the solution after reaction enters filter B and it is carried out filtration treatment, Gained filter cake is used for materials such as building and repair the roads, and the solution removing the insoluble matters such as solid enters concentrator C, concentrates Crystallize in rear entrance crystallizer D；Crystal and supersaturated solution through centrifugal separation equipment E carry out solid- Liquid separates, and the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturation is molten Liquid is then back to concentrator circulation, and when in supersaturated solution, impurity concentration reaches to a certain degree, (impurity content reaches 0.1%), separatory circulation is carried out, to reduce the accumulation of impurity.
Below, present invention following example are illustrated, but is not limited to following example.
Embodiment 1:
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, concrete operation step is as follows:
(1) the waste liquid obtained by after Indonesia's oil-sand uses hydrochloric acid (hydrochloric acid) washing oil, the concentration containing calcium chloride is 77.5g/kg, ferric chloride concn are 1.9g/kg, solids content 8.7g/kg, and solution uses sodium hydroxide solution to carry out Neutralization-precipitation reaction (pH=5.2).
(2) the solution entrance filter after reaction carries out filtration treatment to it, filters and uses continuous operation.
(3) the solution removing the insoluble matters such as solid enters acquisition supersaturated solution after concentrator C concentrates, after concentration Solution enter in crystallizer D and crystallize；Crystal separates (rotating speed 3000 with supersaturated solution through centrifuge Rpm).
(4) the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturated solution Then it is back to concentrator the circulation, (impurity content when impurity concentration reaches to a certain degree in supersaturated solution 0.1%), separatory circulation is carried out, to reduce the accumulation of impurity.
Precipitate gained calcium chloride crystals purity 97.3% after evaporative crystallization again after filtering.
Embodiment 2:
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, concrete operation step is as follows:
(1) the waste liquid obtained by after solid residue uses nitric acid washing oil after the dry distilling of Indonesia's oil-sand, containing nitrification calcium Concentration is 133.2g/kg, iron nitrate concentration is 2.5g/kg, solids content 8.1g/kg, and solution uses sodium hydroxide Solution is neutralized precipitation (pH=6.5).
(2) the solution entrance filter after reaction carries out filtration treatment to it, filters and uses continuous operation.
(3) the solution removing the insoluble matters such as solid enters acquisition supersaturated solution after concentrator C concentrates, after concentration Solution enter in crystallizer D and crystallize；Crystal separates (flow velocity 2m/s) with supersaturated solution through suspension.
(4) the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturated solution Then it is back to concentrator circulation, when impurity concentration reaches to a certain degree in supersaturated solution, carries out separatory circulation, To reduce the accumulation of impurity.
Precipitate gained calcium nitrate purity 98.8% after evaporative crystallization again after filtering.
Embodiment 3:
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, concrete operation step is as follows:
(1) the waste liquid obtained by after greasy filth uses acetic acid washing oil, the concentration containing calcium acetate is 107.8g/kg, vinegar Acid concentration of iron is 2.1g/kg, solids content 7.3g/kg, and solution uses sodium hydroxide solution to be neutralized precipitation (pH=7.4).
(2) the solution entrance filter after reaction carries out filtration treatment to it, filters and uses continuous operation.
(3) the solution removing the insoluble matters such as solid enters acquisition supersaturated solution after concentrator C concentrates, after concentration Solution enter in crystallizer D and crystallize；Crystal separates (rotating speed 1200 with supersaturated solution through centrifuge Rpm).
(4) the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturated solution Then it is back to concentrator circulation, when impurity concentration reaches to a certain degree in supersaturated solution, carries out separatory circulation, To reduce the accumulation of impurity.
Precipitate gained Calcium diacetate monohydrate purity 98.1% after evaporative crystallization again after filtering.
Embodiment 4:
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, concrete operation step is as follows:
(1) the waste liquid obtained by Indonesia's oil-sand uses after formic acid washing oil, the concentration containing calcium chloride be 141.5g/kg, Ferric chloride concn is 1.9g/kg, solids content 9.6g/kg, and solution uses lime aqueous solution to be neutralized precipitation (pH=9.8).
(2) the solution entrance filter after reaction carries out filtration treatment to it, filters and uses continuous operation.
(3) the solution removing the insoluble matters such as solid enters acquisition supersaturated solution after concentrator C concentrates, after concentration Solution enter in crystallizer D and crystallize；Crystal separates (rotating speed 2500 with supersaturated solution through centrifuge Rpm).
(4) the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturated solution Then it is back to concentrator circulation, when impurity concentration reaches to a certain degree in supersaturated solution, carries out separatory circulation, To reduce the accumulation of impurity.
Precipitate gained calcium formate crystal purity 98.8% after evaporative crystallization again after filtering.
Embodiment 5: the present invention also can be achieved through the following technical solutions:
(1) the waste liquid obtained by after oil shale uses hydrochloric acid-hydrofluoric acid mixture washing oil, containing the concentration of calcium ion Being 0.61g/kg, solids content 18.7g/kg for 44.5g/kg, iron concentration, solution uses sodium hydroxide molten Liquid is neutralized precipitation (pH=11.0).
(2) the solution entrance filter after reaction carries out filtration treatment to it, filters and uses continuous operation.
(3) the solution removing the insoluble matters such as solid enters acquisition supersaturated solution after concentrator C concentrates, after concentration Solution enter in crystallizer D and crystallize；Crystal separates (rotating speed 3000 with supersaturated solution through centrifuge Rpm).
(4) the crystal obtained in solid-liquid separator is treated as calcium salt product through exsiccator F, and supersaturated solution Then it is back to concentrator circulation, when impurity concentration reaches to a certain degree in supersaturated solution, carries out separatory circulation, To reduce the accumulation of impurity.
Precipitate after filtering again after evaporative crystallization gained calcium chloride and calcium fluoride total content reach 99.1%.
A kind of heavy oil field that the present invention proposes separates the system and method reclaiming calcium salt in the waste liquid produced, the most logical Cross preferred embodiment to be described, person skilled substantially can without departing from present invention, spirit and In the range of structure as herein described and technical method be modified or suitably change and combine, realize the present invention Technology.Special needs to be pointed out is, all similar replacements and change are aobvious for a person skilled in the art And be clear to, they are considered as being included in present invention spirit, scope and content.

Claims (10)

1. system and the technique reclaiming calcium salt from heavy oil field exploitation waste liquid, it is characterized in that: heavy oil field separates the waste liquid produced or mine tailing uses the classification from heavy oil field exploitation waste liquid of chemical settling, filtering and impurity removing, crystallization, solid-liquid separation, dry method to reclaim different minerals matter composition successively, described heavy oil field separate the waste liquid produced be all kinds of carbonate heavy oil field after pickling, or solvent extraction solid residue through the mine tailing of overpickling or waste liquid.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 1, it is characterised in that: the involved mixture that heavy oil field is the heavy oil such as oil-sand, oil shale, greasy filth, landing oil and mineral.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 1, it is characterised in that: described chemical settling is to react generation precipitation by addition alkaline solution in solution.
It is the most according to claim 1 from a kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid, it is characterised in that: described alkaline solution is sodium hydroxide solution, potassium hydroxide solution, ammonia spirit, lime water or other alkaline solutions.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 1, it is characterised in that: after the pH of the waste liquid after adding alkali is more than 5, stop the addition of alkali liquor.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 1, it is characterised in that: described crystallization process is evaporative crystallization.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 3, it is characterised in that: handled pickle waste liquid is for using waste liquid produced by organic or inorganic acid.
A kind of system and technique reclaiming calcium salt from heavy oil field exploitation waste liquid the most according to claim 3, it is characterised in that: the acid of described pickling is acetic acid, hydrochloric acid, nitric acid, formic acid or hydrobromic acid.
9. system and the technique reclaiming calcium salt from heavy oil field exploitation waste liquid, it is characterised in that: step is as follows:
(1) the oil-sand after being processed by heavy oil field processes mine tailing and adds neutralization reactor, first reacts with alkali liquor, to tan precipitate complete, generate solidliquid mixture, solidliquid mixture input filter, through filtration step in filter, separates solid residue from solution；
(2) after filtering, the filtrate calcium salt soln of gained then inputs and concentrates to concentrator；After concentration, the supersaturated solution of gained crystallizes in being delivered to crystallizer, and the steam of generation reclaims, and gained solidliquid mixture carries out solid-liquid separation by centrifugal or suspension formula solid-liquid separator；
(3) the solid crystal particles obtained from solid-liquid separator is packed after drying through exsiccator, and the calcium salt supersaturated solution circulation separating obtained from solid-liquid separator is then back in concentrator；After impurity content reaches certain level in supersaturated solution (impurity content reaches 0.1%), use the mode of separatory when returning in concentrator, by arranging outside a part of calcium salt supersaturated solution, to reduce impurities accumulation.
The technique reclaiming calcium salt from the waste liquid that the separation of heavy oil field produces the most according to claim 9, it is characterized in that: described supersaturated solution may return on the pipeline that filters, with filter after solution mix after formation calcium salt soln mixed solution enter back into concentrator and concentrate.
CN201610301086.0A 2016-05-09 2016-05-09 System and technique for recovering calcium salts from heavy oil field exploitation waste liquid Pending CN105984988A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1342612A (en) * 2001-10-15 2002-04-03 广西大学 Process for preparing both barium sulfate and calcium chloride from waste ardealite dregs
CN1793103A (en) * 2006-01-17 2006-06-28 浙江大学 Process for preparing calcium formate from recovered formylic acid in waste water of epoxy soybean oil
WO2010151729A1 (en) * 2009-06-25 2010-12-29 Ditommaso Frank A Method of making pure salt from frac-water/wastewater
CN105442048A (en) * 2015-11-16 2016-03-30 武汉工程大学 Process for preparing magnesium hydroxide whisker and calcium sulfate by using phosphate tailings as raw materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1342612A (en) * 2001-10-15 2002-04-03 广西大学 Process for preparing both barium sulfate and calcium chloride from waste ardealite dregs
CN1793103A (en) * 2006-01-17 2006-06-28 浙江大学 Process for preparing calcium formate from recovered formylic acid in waste water of epoxy soybean oil
WO2010151729A1 (en) * 2009-06-25 2010-12-29 Ditommaso Frank A Method of making pure salt from frac-water/wastewater
CN105442048A (en) * 2015-11-16 2016-03-30 武汉工程大学 Process for preparing magnesium hydroxide whisker and calcium sulfate by using phosphate tailings as raw materials

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