CN101362979B - Regenerated coal prepared by oil-containing sludge from oil production field and oil-extraction plant and preparation technology thereof - Google Patents

Regenerated coal prepared by oil-containing sludge from oil production field and oil-extraction plant and preparation technology thereof Download PDF

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Publication number
CN101362979B
CN101362979B CN200810216136A CN200810216136A CN101362979B CN 101362979 B CN101362979 B CN 101362979B CN 200810216136 A CN200810216136 A CN 200810216136A CN 200810216136 A CN200810216136 A CN 200810216136A CN 101362979 B CN101362979 B CN 101362979B
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China
Prior art keywords
sludge
oil
oily sludge
coal
percent
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CN200810216136A
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CN101362979A (en
Inventor
周泽宇
林铭聪
许东阳
林进源
刘书敏
周巍
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Shenzhen Yuli Technology Co., Ltd.
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SHENZHEN YULI TECHNOLOGY Co Ltd
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Abstract

The invention relates to an oily sludge renewable coal and a production technology thereof for an oil field and a refinery. The renewable coal composition is composed of 10 percent to 30 percent of oily sludge, 60 percent to 80 percent of coal, 3 percent to 6 percent of sulfur fixing matter and 1 percent to 5 percent of preservative according to the weight percentage. The production technology comprises the following steps: sludge thickening to flocculation reaction to sludge dehydration to stirring and mixing to extrusion forming and drying by a tunnel kiln. The production technology further comprises the disposal technology of wastewater containing oily sludge: wastewater to an oil separating tank to an air flotation tank to an anaerobic tank to an aerobic tank to a secondary sedimentation tank to a transition tank to an electricity charge payment device to a coagulation and air flotation tank to a clean water tank. The wastewater can achieve the national first level discharge standard after the treatment, and the outlet water is reused for green irrigation or car washing or toilet flushing. The oily sludge renewable coal has the advantages of high calorific value, low ignition point and low production cost, thereby truly realizing the purposes of reduction, harmlessness and resource utilization of the oily sludge.

Description

Oil recovery field and refinery oily sludge be soft coal and production technique thereof again
Technical field
The present invention relates to a kind of recover the oil field and refinery oily sludge Treatment Technology of being directed against, particularly a kind of oil recovery field and refinery oily sludge be soft coal and production technique thereof again.
Background technology
Oily sludge is one of important pollutent that produces in oil recovery field and refinery exploitation and the storage and transport process, also is a great problem of influence oil recovery field and refinery and surrounding enviroment quality.Oily sludge mainly is divided three classes: the oily sludge that the oily sludge that Oil extraction produces, oil field gathering and transportation process are produced, sewage from oil refinery are handled an oily sludge that produces.General oil length is 10%~50% in the oily sludge; Water ratio is 40%~90%; In the China's oil petrochemical industry, produce 800,000 tons of jar bed muds, pond bed mud every year on average, the annual oily sludge that produces of Shengli Oil Field is more than 100,000 tons; Annual about 150,000 tons of the oily sludge that produces of Dagang Oilfield, Henan Oil Field is annual to produce 5 * 10 4m 3Oily sludge.
The composition of oil recovery field and refinery oily sludge is extremely complicated; Generally form by oil-in-water, water-in-oil and suspended solid impurities; It is a kind of extremely stable suspension emulsion system; Contain a large amount of aging crude oil, colloid, bituminous matter, wax, suspended solid, bacterium, salt, sour gas, corrosion products etc., also comprise water conditioners such as a large amount of flocculation agent of adding in the production process, inhibiter, Scale inhibitors, sterilant.Therefore, at different water quality, treatment process and pharmacy type and add under the condition of dose, the composition of oily sludge and output difference are very big.Wherein contain a large amount of benzene series things, pyrene, anthracene, aldehydes matter, and stench and poisonous, do not handle, both contaminate environment was wasted resource again.
The processing final purpose of oily sludge is to turn to principle with minimizing, innoxious, resource.At present, oily sludge treatment process commonly used: solvent extration, burning method, biological process, pyrogenic process, oily sludge profile control, oily sludge comprehensive utilization etc.Many methods all exist some problems, and some working cost is high, and facility investment is big, and general does not get up the utilization of resources.Like big, the easy generation secondary pollution of domestic burning method commonly used power consumption, oily resource does not obtain recycling yet; Biological treatment need last 41 days could be with 97% petroleum hydrocarbon biological degradation, and same oily resource does not obtain recycling yet; The problem that solvent extration exists is a long flow path, complex process, and processing costs is high, only the oily sludge that contains a large amount of hardly degraded organic substances is suitable for; Chemical demulsification method need add emulsion splitter and heating in addition to the serious oily sludge of emulsification; Solid-liquid isolation method is low for the oil recovery rate that contains innage, with serious pollution oily sludge.So these methods are failed at home popularization and application effectively.
Summary of the invention
The purpose of this invention is to provide and a kind of oily sludge is converted into soft coal again; Solve the desulphurization problem in the regeneration burning of coal through additive; And the waste water that is produced in the preparation process handled making it be back to use green area irrigation or be back to carwash, flush the toilet etc., the oily sludge of really realizing the minimizing of oily sludge, innoxious, resource utilization is soft coal again.Another object of the present invention provides a kind of an oil recovery and the refinery oily sludge production technique of soft coal again.
The object of the invention can reach through following measure:
This oil recovery field and refinery oily sludge be soft coal again, and its special character is: said composition is composed of the following components by weight percentage:
Oily sludge 10%~30% coal 60%~80%
Gu sulphur thing 3%~6% sanitas 1%~5%.
Below the broken 3mm of said coal, selecting combustion heat value for use is the common coal of 3000Kcal/Kg~4000Kcal/Kg, preferential 3500Kcal/Kg.
The object of the invention can also reach through following measure:
Prepare above-mentioned oil recovery field and the refinery oily sludge production technique of soft coal again, its special character is that this method may further comprise the steps:
(1) mud concentrates;
(2) flocculation reaction;
(3) sludge dewatering;
(4) mix;
(5) extrusion molding;
(6) tunnel oven dry.
Said step (1) further comprises: the oily sludge that will compile or collect in the sludge sump is promoted to sludge thickener through the mud lift pump; Mud passed through gravity settling 2~5 hours in concentration basin; Moisture percentage in sewage sludge after concentrating is 90%~95%, and upper strata waste water enters sewage plant and handles.
Said step (2) further comprises: the mud through after the concentration is transported to line mixer, to line mixer, adds flocculation agent from drug dissolving tank simultaneously, makes flocculation agent and thickened sludge hybrid reaction.
Said step (3) further comprises: the mud after flocculation is transported in the dehydration equipment and dewaters, and the moisture percentage in sewage sludge after the dehydration is 70%~80%, and the waste water of generation enters sewage plant and handles.
Said step (4) further comprises: the coal after mud after the processed and process fragmentation is transported to stirrer in the ratio of 1:3~1:4, mixes in the lump to wherein adding little additive simultaneously.
Said step (5) further comprises: the product that mixes is passed through single-lead-screw extruding briquetting machine; Produce different shapes oily sludge soft coal more as required; Required shape can be reached by the template pass design of extruding, and this moment, the water ratio of soft coal was 20%~30% again.
Said step (6) further comprises: the product after the extrusion molding adopts the oven dry of tunnel formula steam heating, and 160 ° of C of saturated-steam temperature supply warm steam coal to adopt this product; Oven dry back product water ratio is controlled in 15%, and warehouse-in is stored.
Said oil recovery field and refinery oily sludge be the production technique of soft coal again, also further comprises the treatment process to oily sludge waste water:
(1) waste water enters slop oil tank through oil trap with the sump oil of collecting;
(2) the oil trap water outlet is lifted into colloid, particulate matter, bits foam and the oil substances that air flotation pool carries out air supporting removal suspension with pump, and the scum silica frost of generation enters sludge thickener;
(3) the coagulation floatation water outlet after flowing into anaerobic pond, Aerobic Pond biochemical treatment, enters second pond successively, is back to anaerobic pond through the sedimentary mud part of second pond, and another part enters sludge thickener with the body refuse that coagulation floatation produces;
(4) the second pond water outlet is pumped into the last step coagulation floatation after the transition pond enters the logical pond of the electricity charge and handles, and the air supporting water outlet flows into clean water basin;
(5) waste water is through after this art breading, and its clean effluent reuse is in green area irrigation or be back to carwash, flush the toilet.
The present invention compares prior art and has the following advantages:
(1) soft coal has the calorific value height to oily sludge again, burning-point is low and the low advantage of production cost, really realizes minimizing, the resource utilization, innoxious of oily sludge.
(2) because oily sludge contains sour gas, corrosion product etc.; In additive, added alkaline matter, in the process of coal combustion, just can neutralize, therefore; Oily sludge of the present invention soft coal again is applicable to Industrial Boiler and heating boiler, is more suitable in civil honeycomb briquette.
(3) waste water can reach (GB8978-1996) primary standard of China Petrochemical Industry's industry class of country's " integrated wastewater discharge standard ", wherein: CODCr≤60mg/L, suspended substance≤70mg/L, petroleum-type≤5mg/L through after this art breading.
Description of drawings
Fig. 1 is oily sludge regeneration coal technological process of production figure of the present invention.
Fig. 2 is processing technological flow figure wastewater produced in the implementation process of the present invention
Embodiment
The present invention below will combine accompanying drawing to do further to detail:
Embodiment:
Take by weighing raw material (kilogram) by following proportioning:
Oily sludge, coal 45%, solid sulphur thing 5%, tackiness agent and sanitas 5%.
Oily sludge 20% coal 70%
Gu sulphur thing 5% sanitas 5%.
Said coal is crushed to below the 3mm, and selecting combustion heat value for use is the common coal of 3000Kcal/Kg~4000Kcal/Kg, preferential 3500Kcal/Kg.
See also shown in Figure 1ly, oily sludge of the present invention regeneration coal production technique is following:
1) all kinds of oily sludges is collected into the mud collecting tank;
2) oily sludge in the mud collecting tank is promoted to sludge thickener through the mud lift pump, mud passed through gravity settling 2 hours in concentration basin, and upper strata waste water enters sewage plant and handles;
3) will cross concentration mud afterwards and be delivered to line mixer, to line mixer, add PAM from drug dissolving tank simultaneously, make PAM and thickened sludge hybrid reaction;
4) mud after will flocculating is transported in the vacuum belt water extracter and dewaters, and the waste water of generation enters sewage plant and handles;
5) be transported to stirrer with the mud after the processed and through the coal after the fragmentation in the 1:3 ratio, mix in the lump to wherein adding a small amount of other additives simultaneously.
6) the above-mentioned product that mixes is passed through single-lead-screw extruding briquetting machine, produce different shapes oily sludge soft coal more as required, required shape can be reached by the template pass design of extruding.
7) last, the product after the extrusion molding is adopted the oven dry of tunnel formula steam heating, 160 ° of C of saturated-steam temperature supply warm steam coal can adopt this product, and oven dry back product water ratio is controlled in 12%, and warehouse-in is stored.The process of oven dry also is germ-resistant process.
See also shown in Figure 2ly, this working method also further comprises the treatment process to oily sludge waste water:
(1) waste water enters slop oil tank through oil trap with the sump oil of collecting;
(2) the oil trap water outlet is lifted into colloid, particulate matter, bits foam and the oil substances that air flotation pool carries out air supporting removal suspension with pump, and the scum silica frost of generation enters sludge thickener;
(3) the coagulation floatation water outlet after flowing into anaerobic pond, Aerobic Pond biochemical treatment, enters second pond successively, is back to anaerobic pond through the sedimentary mud part of second pond, and another part enters sludge thickener with the body refuse that coagulation floatation produces;
(4) the second pond water outlet is pumped into the last step coagulation floatation after the transition pond enters the logical pond of the electricity charge and handles, and the air supporting water outlet flows into clean water basin;
(5) waste water is through after this art breading, and its clean effluent reuse is in green area irrigation or be back to carwash, flush the toilet.
The treatment process of said oily sludge waste water, wherein the end of treatment scheme is provided with electricity charge circulation method, and its principle is: in 6~24V low pressure electrostatic field; Throwing sulfuric acid accent waste water ph is 4, and adds an amount of ydrogen peroxide 50 and ferrous sulfate by the COD value of waste water, stops after 2 hours; Produce the hydroxyl radical free radical ion, make inorganicization of organism remaining in the waste water, become carbonic acid gas and water; Thereby guarantee the water outlet qualified discharge behind the biochemistry, and regulate dosage and can control water outlet COD value artificially.
The above is merely preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.

Claims (1)

1. one kind is recovered the oil and the refinery oily sludge production technique of soft coal again, and said oily sludge soft coal again is composed of the following components by weight percentage:
Oily sludge 10%~30% coal 60%~80%
Gu sulphur thing 3%~6% sanitas 1%~5%;
It is characterized in that this production technique may further comprise the steps:
(1) mud concentrates: the oily sludge that will compile or collect in the sludge sump is promoted to sludge thickener through the mud lift pump; Mud passed through gravity settling 2~5 hours in concentration basin; Moisture percentage in sewage sludge after concentrating is 90%~95%, and upper strata waste water enters sewage plant and handles;
(2) flocculation reaction: the mud through after the concentration is transported to line mixer, to line mixer, adds flocculation agent from drug dissolving tank simultaneously, makes flocculation agent and thickened sludge hybrid reaction;
(3) sludge dewatering: the mud after flocculation is transported in the dehydration equipment and dewaters, and the moisture percentage in sewage sludge after the dehydration is 70%~80%, and the waste water of generation enters sewage plant and handles;
(4) mix: be transported to stirrer through the mud after the processed and through the coal after the fragmentation in 1: 3~1: 4 ratio, mix in the lump to wherein adding little additive simultaneously;
(5) extrusion molding: the product that mixes through single-lead-screw extruding briquetting machine, is produced different shapes oily sludge soft coal more as required, and required shape can be reached by the template pass design of extruding, and this moment, the water ratio of soft coal was 20%~30% again;
(6) tunnel oven dry: the product after the extrusion molding adopts the oven dry of tunnel formula steam heating, and 160 ℃ of saturated-steam temperatures supply warm steam coal to adopt this product; Oven dry back product water ratio is controlled in 15%, and warehouse-in is stored;
This method also further comprises the treatment process to oily sludge waste water:
(1) waste water enters slop oil tank through oil trap with the sump oil of collecting;
(2) the oil trap water outlet is lifted into colloid, particulate matter, bits foam and the oil substances that air flotation pool carries out air supporting removal suspension with pump, and the scum silica frost of generation enters sludge thickener;
(3) the coagulation floatation water outlet after flowing into anaerobic pond, Aerobic Pond biochemical treatment, enters second pond successively, is back to anaerobic pond through the sedimentary mud part of second pond, and another part enters sludge thickener with the body refuse that coagulation floatation produces;
(4) the second pond water outlet is pumped into the last step coagulation floatation after the transition pond enters the logical pond of the electricity charge and handles, and the air supporting water outlet flows into clean water basin;
(5) waste water is through after this art breading, and its clean effluent reuse is in green area irrigation or be back to carwash, flush the toilet.
CN200810216136A 2008-09-12 2008-09-12 Regenerated coal prepared by oil-containing sludge from oil production field and oil-extraction plant and preparation technology thereof Expired - Fee Related CN101362979B (en)

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Publication number Priority date Publication date Assignee Title
CN101793403A (en) * 2010-03-15 2010-08-04 陈凤飞 Method for treating sludge
CN102021062B (en) * 2010-12-13 2013-12-11 日照金禾博源生化有限公司 Process method for preparing boiler fuels from citric acid industrial flocculent sludge
CN105923930A (en) * 2016-07-08 2016-09-07 吴印强 Biological treatment technology for sewage
CN106587547B (en) * 2016-11-22 2019-07-16 北京市理化分析测试中心 A kind of analogy method of the special greasy filth in oil field

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
姜勇,赵朝成,赵东风.含油污泥特点及处理方法.《油气田环境保护》.2005,第15卷(第4期),第38-41,60页. *

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Applicant before: Zhou Zeyu

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Assignor: Shenzhen Yuli Technology Co., Ltd.

Contract record no.: 2013440020280

Denomination of invention: Regenerated coal prepared by oil-containing sludge from oil production field and oil-extraction plant and preparation technology thereof

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