CN103663778B - Method for realizing oily sludge reduction through pre-oxidation-sludge recycling - Google Patents
Method for realizing oily sludge reduction through pre-oxidation-sludge recycling Download PDFInfo
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- CN103663778B CN103663778B CN201310570338.6A CN201310570338A CN103663778B CN 103663778 B CN103663778 B CN 103663778B CN 201310570338 A CN201310570338 A CN 201310570338A CN 103663778 B CN103663778 B CN 103663778B
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Abstract
The invention relates to the technical field of oily sludge treatment, and particularly relates to a method for realizing oily sludge reduction through pre-oxidation-sludge recycling. According to the method, an oxidant is added to oily sewage before oily sewage enters an oil receiving buffer tank and a water purifying agent, a flocculant and a nucleating agent are added between the oil receiving buffer tank and a mixer, thus reaching the purpose of deeply purifying water quality. After the oily sewage is treated by the method provided by the invention, the yield of sludge is reduced by over 60% in comparison with that in the prior art, so that the method has good reduction effect; furthermore, in the treated oily sewage, the content of suspended solids is not more than 5mg/L and the oil content is less than 5mg/L, the median particle diameter of the effluent is less than 1mu m, the corrosion rate and scaling rate of pipelines are obviously lowered, so that separation effect is improved and production cost is saved.
Description
Technical field
the present invention relates to contained Mud Treatment Technology field, is a kind of method adopting preoxidation-mud reuse to realize oily sludge minimizing.
Background technology
current Chinese scholars has done large quantity research to sludge reduction technology, has especially achieved certain achievement to the R and D of sludge reduction process control and Reduction Technology.Mainly concentrate on the minimizing of the excess sludge in municipal sewage treatment, the minimizing research for Sludge in Oilfields is very few.The minimizing process of mud mainly refers to that the concentrated of mud subtracts appearance process.Object is to reduce the moisture content in mud, reduces sludge volume, so that transport and subsequent disposal and treatment and use.From the technological angle of sludge reduction process, the oily sludge in this stage is divided into Sources decreasing and two stages of process decrement.First stage, the Sources decreasing of oily sludge, major measure reduces mud generation by screening medicament and optimization for the treatment of conditions; Subordinate phase, the process decrement of oily sludge, mainly by the concentrated of mud and dewatering process, realizes the volume reduction treatment of mud.To produce a large amount of oily sludges in oil-field development production process, along with the difference of sewage treatment process, its sludge quantity is also not quite similar, but has a common ground to be exactly that volume is large, and water ratio is high.As: sewage precipitation tank base sludge water ratio is more than 99%, and because volume is large, water ratio is high, and when processing, initial cost is high, and running cost is large, and transport is disposed costly.Therefore, first its volume should reduce by sludge treatment.The method of current employing is mostly concentrated and dewatering process.Three phases is spoil disposal technique, and spoil disposal technique implements the important step before sludge reduction.Due to the operation of container all kinds of in oilfield process, bottom accumulation produces a large amount of oily sludges, only has the effective discharge to these oily sludges and collection, just can carry out the minimizing process of mud.The large tank spoil disposal technique that current oil field is commonly used mainly contains: mud etc. scraped by deposition hole stopping production spoil disposal, self-pressure spoil disposal, static pressure punching pipe spoil disposal, negative pressure spoil disposal, machinery.The existing Sludge in Oilfields of China is primarily of following three parts compositions: the suspended solid such as silt particle, landwaste, clay 1. carrying under one's arms out from stratum in extraction sewage, collect defeated and corrosion product, dirt and bacterium residue treating processes; 2. in produced water disposal process, colloid breaks the steady rear throw out formed; 3. there is the throw out that chemical reaction produces after adding medicament; 4. the residue of medicament itself generation, as lime character is slightly soluble in water, solubleness is low, and level of residue is large.Research and analyse discovery by mechanism and actual, the mud that 1., 2. part produces cannot reduce, but growing amount is less, generally accounts for 10% to 15% of mud total amount; 3. the mud that, 4. part produces is the main component of association mud, accounts for 80% to 85% of quantum of output, is the main direction reducing mud quantum of output.Namely the topmost means of sludge reduction are from watershed management, reduce mud quantum of output.How Sources decreasing is realized in current disposal of oily sludge process, reduce the generation of greasy filth and the exploitation of discharge correlation technique and technique, note the water ratio how reducing mud in production process simultaneously, reduce the volume of greasy filth, and then improve the processing efficiency of mud.The domestic Decrement Technique research to oily sludge is at present little, search domestic patent, do not find the patent application of the oily sludge Decrement Technique of being correlated with, to domestic literature search find (Wang Qiang. oily sludge minimizing treatment process study. petrochemical technology and application thereof, 2010,28(2): 155-158) be for Waste water treatment factory water ratio be 95. 50% to 98. 50% oily sludge, carried out hardening and tempering process optimization process experiment.Exploitation is a kind of adopts polymerize aluminum chloride/sodium polysilicate/LSH-703 compound to be adjusting material, and achieve partial sludge decrement, this research has just carried out the exploitation of medicament for hardening and tempering process.Not carrying out decrement to whole system, is not a kind of Sources decreasing technology, just the development and research of mud decrement medicament.
Summary of the invention
the invention provides a kind of method adopting preoxidation-mud reuse to realize oily sludge minimizing, overcome the deficiency of above-mentioned prior art, it effectively can solve the problem that existing Oil Containing Sludge Treatment can not meet Production requirement.
one of technical scheme of the present invention is realized by following measures: a kind of method adopting preoxidation-mud reuse to realize oily sludge minimizing, carry out in the steps below: the first step, add 1 mg to 5mg oxygenant entering in the oily(waste)water received before oily surge tank in by often liter of oily(waste)water, in oily(waste)water, add oxygenant preoxidation is carried out to oily(waste)water; Second step, oily(waste)water after preoxidation enters to be received in oily surge tank and forms suspension, respectively by adding 150 mg to 200mg water purification agents in often liter of suspension, by adding 50 mg to 60mg flocculation agents in often liter of suspension and by the nucleator adding 0.1 gram to 0.3 gram in every 100 grams of suspension, add water purification agent, flocculation agent and nucleator respectively to from the suspension received in oily surge tank out from the suspension received oily surge tank out; 3rd step, the suspension after adding water purification agent, flocculation agent and nucleator enters water filling device successively after mixing tank, slurry tank, surge tank and strainer.
here is the further optimization and/or improvements to one of foregoing invention technical scheme:
above-mentioned oxygenant is sodium chlorate.
above-mentioned water purification agent obtains as follows, wilkinite and flyash is configured to for 9:1 is added to the water the suspension that mass percent is 5% to 10% in mass ratio, obtains water purification agent.
above-mentioned flocculation agent is composite flocculant, and composite flocculant obtains as follows, calcium carbonate, calcium chloride and polymerize aluminum chloride is configured to for 3:2:5 is added to the water the aqueous solution that mass percent is 2% to 3% in mass ratio, obtains composite flocculant.
above-mentioned nucleator is the positively charged ion or the anionic polymer polyacrylamide that are dissolved in water.
the present invention is by adding oxygenant to entering in the oily(waste)water received before oily surge tank, adding water purification agent, flocculation agent and nucleator thus reaching the object that deep layer purifies water receiving between oily surge tank and mixing tank, oily(waste)water is after the present invention adopts preoxidation-mud reuse to realize the method process of oily sludge minimizing, output sludge quantity reduces more than 60% than existing technique, serves good reduced training; In oily(waste)water simultaneously after process, suspended substance is equal to or less than 5mg/L, and oleaginousness is less than 5mg/L, and water outlet median particle size is less than 1 μm, has significant decline to the corrosion of pipeline and scaling rate, thus improves separation and saved production cost.
Accompanying drawing explanation
accompanying drawing 1 is process flow diagram of the present invention.
accompanying drawing 2 is schemed over time for suspended substance in oily(waste)water before present invention process steady running.
accompanying drawing 3 is schemed over time for oleaginousness in oily(waste)water before present invention process steady running.
accompanying drawing 4 is schemed over time for water outlet median particle size in oily(waste)water before present invention process steady running.
Embodiment
the present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and practical situation.
embodiment 1, this employing preoxidation-mud reuse realizes the method for oily sludge minimizing, carry out in the steps below: the first step, add 1 mg to 5mg oxygenant entering in the oily(waste)water received before oily surge tank in by often liter of oily(waste)water, in oily(waste)water, add oxygenant preoxidation is carried out to oily(waste)water; Second step, oily(waste)water after preoxidation enters to be received in oily surge tank and forms suspension, respectively by adding 150 mg to 200mg water purification agents in often liter of suspension, by adding 50 mg to 60mg flocculation agents in often liter of suspension and by the nucleator adding 0.1 gram to 0.3 gram in every 100 grams of suspension, add water purification agent, flocculation agent and nucleator respectively to from the suspension received in oily surge tank out from the suspension received oily surge tank out; 3rd step, the suspension after adding water purification agent, flocculation agent and nucleator enters water filling device successively after mixing tank, slurry tank, surge tank and strainer.In equipment smooth running process, the pH value entering the suspension of mixing tank is 6.5 to 8, does not need adjust ph.It is add oxygenant before adding other sewage treatment drug that sludge technology falls in preoxidation, is the useful ion with water purification effect by some ion conversions in sewage; Reduce the pH value of former art breading water simultaneously, mud quantum of output more than 60% can be reduced.Preoxidation sewage disposal technology improves the compatibleness of reinjected water and local water, reduces erosion rate, reaches the object that deep layer purifies water.
embodiment 2, this employing preoxidation-mud reuse realizes the method for oily sludge minimizing, carry out in the steps below: the first step, add 1 mg or 5mg oxygenant entering in the oily(waste)water received before oily surge tank in by often liter of oily(waste)water, in oily(waste)water, add oxygenant preoxidation is carried out to oily(waste)water; Second step, oily(waste)water after preoxidation enters to be received in oily surge tank and forms suspension, respectively by adding 150 mg or 200mg water purification agents in often liter of suspension, by adding 50 mg or 60mg flocculation agents in often liter of suspension and by the nucleator adding 0.1 gram or 0.3 gram in every 100 grams of suspension, add water purification agent, flocculation agent and nucleator respectively to from the suspension received in oily surge tank out from the suspension received oily surge tank out; 3rd step, the suspension after adding water purification agent, flocculation agent and nucleator enters water filling device successively after mixing tank, slurry tank, surge tank and strainer.
embodiment 3, as the optimization of above-described embodiment, in embodiment 3, oxygenant is sodium chlorate.
embodiment 4, as the optimization of above-described embodiment, in embodiment 4, water purification agent obtains as follows, wilkinite and flyash is configured to for 9:1 is added to the water the suspension that mass percent is 5% to 10% in mass ratio, obtains water purification agent.This water purification agent has the advantages that cost is low, purifying water effect is good.
embodiment 5, as the optimization of above-described embodiment, in embodiment 5, flocculation agent is composite flocculant, composite flocculant obtains as follows, calcium carbonate, calcium chloride and polymerize aluminum chloride are configured to for 3:2:5 is added to the water the aqueous solution that mass percent is 2% to 3% in mass ratio, obtain composite flocculant.This composite flocculant has the advantages that cost is low, flocculating effect is good.
embodiment 6, as the optimization of above-described embodiment, in embodiment 6, nucleator is the positively charged ion or the anionic polymer polyacrylamide that are dissolved in water.
here be in the oily(waste)water after adopting preoxidation-mud reuse to realize the method process of oily sludge minimizing according to the above embodiment of the present invention indices and the economic benefit that reaches as follows.
accompanying drawing 2 is schemed over time for suspended substance in oily(waste)water before present invention process steady running; Accompanying drawing 3 is schemed over time for oleaginousness in oily(waste)water before present invention process steady running; Accompanying drawing 4 is schemed over time for water outlet median particle size in oily(waste)water before present invention process steady running; As can be seen from Fig. 2, Fig. 3 and Fig. 4, suspended substance, oleaginousness and water outlet median particle size in system cloud gray model first 24 hours oily(waste)waters all can not be up to standard, system run all right after system cloud gray model 24 hours, go out suspended substance in the oily(waste)water of strainer and be equal to or less than 5mg/L, oleaginousness is less than 5mg/L, water outlet median particle size is less than 1 μm, all reaches the water quality requirement entering water filling device; Be standard according to slurry tank water outlet, be 2000 cubic metres of calculating by oily water treatment every day amount, the sludge quantity of oily(waste)water generation every day after the above embodiment of the present invention adopts preoxidation-mud reuse to realize the method process of oily sludge minimizing is 100 kilograms, output sludge quantity reduces more than 60% than existing technique, reach the object that deep layer purifies water, serve good reduced training; Meanwhile, the oily(waste)water after the above embodiment of the present invention adopts preoxidation-mud reuse to realize the method process of oily sludge minimizing has significant decline to the corrosion of pipeline and scaling rate, thus has saved production cost.
above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (1)
1. the method adopting preoxidation-mud reuse to realize oily sludge minimizing, it is characterized in that carrying out in the steps below: the first step, add 1 mg to 5mg oxygenant entering in the oily(waste)water received before oily surge tank in by often liter of oily(waste)water, in oily(waste)water, add oxygenant preoxidation is carried out to oily(waste)water; Second step, oily(waste)water after preoxidation enters to be received in oily surge tank and forms suspension, respectively by adding 150 mg to 200mg water purification agents in often liter of suspension, by adding 50 mg to 60mg flocculation agents in often liter of suspension and by the nucleator adding 0.1 gram to 0.3 gram in every 100 grams of suspension, add water purification agent, flocculation agent and nucleator respectively to from the suspension received in oily surge tank out from the suspension received oily surge tank out; 3rd step, the suspension after adding water purification agent, flocculation agent and nucleator enters water filling device successively after mixing tank, slurry tank, surge tank and strainer; Wherein: oxygenant is sodium chlorate; Water purification agent obtains as follows, wilkinite and flyash is configured to for 9:1 is added to the water the suspension that mass percent is 5% to 10% in mass ratio, obtains water purification agent; Flocculation agent is composite flocculant, and composite flocculant obtains as follows, calcium carbonate, calcium chloride and polymerize aluminum chloride is configured to for 3:2:5 is added to the water the aqueous solution that mass percent is 2% to 3% in mass ratio, obtains composite flocculant; Nucleator is the positively charged ion or the anionic polymer polyacrylamide that are dissolved in water.
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| CN105601073A (en) * | 2015-12-29 | 2016-05-25 | 哈尔滨工业大学 | Reduction treatment method for oily sludge |
| CN105906175A (en) * | 2016-05-03 | 2016-08-31 | 上海幸使环保科技有限公司 | Treatment method and treatment device of oil sludge sand |
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| JP2004255290A (en) * | 2003-02-26 | 2004-09-16 | Toshikatsu Hamano | Waste water treatment method for crude oil-containing waste water using polymer coagulant and oxidizing agent |
| CN101139142A (en) * | 2007-08-21 | 2008-03-12 | 洪骧龙 | Oily sewage processing method |
| CN101327976B (en) * | 2008-07-15 | 2012-01-25 | 南通立源水业科技发展有限公司 | Efficient water treatment flocculant |
| CN102923878B (en) * | 2012-10-23 | 2014-01-01 | 西安建筑科技大学 | Equipment and process for modular treatment of oil field wastewater |
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Effective date of registration: 20170215 Address after: 834000 the Xinjiang Uygur Autonomous Region, Karamay ping North Road, No. six, No. 5680 Patentee after: PetroChina Karamay Petrochemical Co., Ltd. Address before: No. 8 oil refining Research Institute of chemical industry science and technology of Karamay City Road 834000 the Xinjiang Uygur Autonomous Region oil spring Patentee before: Jinshan Petrochemical Co., Ltd., Kelamyi City |