CN105436187A - Drilling waste completely harmless comprehensive treatment method - Google Patents
Drilling waste completely harmless comprehensive treatment method Download PDFInfo
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- CN105436187A CN105436187A CN201410494437.5A CN201410494437A CN105436187A CN 105436187 A CN105436187 A CN 105436187A CN 201410494437 A CN201410494437 A CN 201410494437A CN 105436187 A CN105436187 A CN 105436187A
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Abstract
A drilling waste completely harmless comprehensive treatment method and device are provided; hot gas generated from fuel burning is used as a heat source, and drilling cuttings are subjected to harmless treatment at high temperature of 500-800 DEG C; high-temperature tail gas of the harmless drilling cuttings is used as a heat source for drying the drilling cuttings and is used for drying a wet material obtained after mixing a drilling waste slurry and the drilling cuttings; the dried drilling cuttings are subjected to high temperature harmless treatment; tail gas of the dried drilling cuttings and drilling waste water form cross flow heat and mass transferring, the tail gas releases heat, is purified and is discharged out, and the waste water absorbs heat, is evaporated and has the amount reduced; and finally, completely harmless treatment of the drilling waste is achieved. One device with output heat quantity of 2.5 million kcal/h can perform harmless treatment on 16293 kg/h of the drilling cuttings, simultaneously dries 1472-2697 kg/h of the drilling fluid with the solid content of 20-40% (v/v) and the density of 1600-2200 kg/m<3>, or simultaneously evaporates 736 kg/h of the drilling waste water. The total externally added power does not exceed 50 kW. The physical method performs harmless treatment on the drilling waste and can eliminate pollution hidden dangers of the drilling waste to the environment.
Description
Technical field the present invention relates to a kind of drilling wastes (waste water, useless slurry, drilling cuttings) complete innocent comprehensive approach method, utilize the thermal source that fuel produces in Combustion of Hot Air Furnace, the hot gas of burning is carrier gas, the drill chip innocent crossed by mud soak is made by pyrolytic, utilize the thermal source that a tail gas after pyrolytic is mummification preheating drilling cuttings, the useless slurry of drilling well and the mixed wet stock of mummification drilling cuttings and tail gas are in swinging drying oven and flow transmission of heat by contact mass transfer, drilling cuttings after mummification preheating makes it innoxious through pyrolytic again, the secondary tail gas that tail gas is formed after mummification preheating drilling cuttings and well-drilling waste water form cross-current mass-and heat-transfer, the heat release of secondary tail gas is purified and the aqueous phase taken away in waste water and discharging, waste water heat absorption evaporation decrement, finally realize the object of the complete innoxious comprehensive regulation of drilling wastes.
Background technology drilling wastes (waste water, useless slurry, drilling cuttings) complete innoxious field integrated process is the environmental protection problem that situ of drilling well must solve.The method of prior art process drilling wastes is mainly: waste water chemical treatment discharge, useless slurry and drilling cuttings chemical treatment solidify & bury.The subject matter existed is: chemical treatment method will new pollution source; The useless slurry solidification of drilling well difficulty up to standard, the hidden danger of contaminated environment must be brought, need interpolation 100% to solidify aggregate, the increase of its landfill volume is subject to the restriction of well site surrounding enviroment capacity and arable land tension-causing factor, oil-based drill cuttings solidification process can not be up to standard, and its combustion heat energy of direct burning disposal can not utilize simultaneously.It is completely innoxious that the above-mentioned method processed respectively by drilling wastes can not realize discarded object, will the hidden danger of carryover contamination environment.
Summary of the invention the present invention discloses a kind of heat energy utilizing fuel to produce in Combustion of Hot Air Furnace, take the innoxious drilling cuttings of pyrolytic, mummification preheating is given up and is starched the drilling cuttings wet feed that mixes with mummification drilling cuttings, the method of evaporation decrement well-drilling waste water, the hot blast of any temperature between 500 DEG C ~ 800 DEG C that it is characterized in that utilizing combustion fuel to provide, hot blast wind speed is any value between 2000 cubes ms/h ~ 5000 cubes ms/h, utilize the thermal source that a tail gas after pyrolytic is mummification preheating drilling cuttings, drilling well is useless starches with the mixed wet stock of mummification drilling cuttings and a tail gas and flows transmission of heat by contact mass transfer, a tail gas is lowered the temperature and is taken away steam and is converted to secondary tail gas, drilling cuttings wet feed heat absorption intensification moisture evaporation moisture content reduces, last intensification in the hot room of hot-blast stove reaches more than 450 DEG C and makes solid phase particles innoxious.Innoxious drilling cuttings efficiency reaches 1.54 ~ 3.10kg/1000kJ, evaporating waste water efficiency reaches 2.0 ~ 4.2kg/1000kJ.Total additionaling power consumption is no more than 50kW;
Concrete grammar of the present invention is: by combustion type hot air stove 1, swinging drying oven 2, tail gas siccative collector 3, vertical elevator 4, mixing agitator 5, drilling fluid distributor 6 is connected with spiral conveyor 7, fuel burn in combustion chamber of hot-blast stove 1-1 formed hot blast be thermal source, drilling cuttings is rendered in mixing agitator 5 to drop into speed 8500 ~ 16000kg/h, stirring migration to end through mixing agitator 5 to be entered swinging drying oven 2 in and the combustion type hot air stove hot blast co-current contact heat and mass of 500 ~ 800 DEG C finally forms mummification drilling cuttings by self gravitation, the useless slurry of drilling well is connected with drilling fluid distributor 6 by pipe fitting through drilling fluid pump 11, the useless slurry of drilling well of drilling fluid distributor 6 is by 0.30 ~ 0.59m
3the speed of/h, make it fully to mix with the mummification drilling cuttings transmitted via vertical elevator 4 in mixing agitator 5 through line distribution, the drilling cuttings wet feed mixed is entered by self gravitation in swinging drying oven 2 finally to heat up in swinging drying oven with the combustion type hot air stove hot blast co-current contact heat and mass of 500 ~ 800 DEG C and reaches 180 ~ 360 DEG C of mummification drilling cuttings, promote via vertical elevator 4 and shunt, a part enters mixing agitator 5 and mixes with useless slurry of drilling well, a part enters that being entered by self gravitation in hot-blast stove hot room 1-2 after spiral conveyor 7 transmits heats up and reaches more than 450 DEG C and makes solid phase particles innoxious, finally discharge from hot-blast stove hot room 1-2 with innoxious solid phase particles or powder morphology, drilling cuttings drying tail gas is incorporated in spray type dust separator through air-introduced machine 10 by tail gas siccative collector 3, cross-current mass-and heat-transfer is formed with the waste water by feeding spraying pump 9 pumping, waste water heat absorption evaporation decrement, tail gas heat release is purified and the aqueous phase taken away in waste water is discharged through air-introduced machine 10, thus set up the innoxious comprehensive regulation circulation of drilling wastes.Innoxious drilling cuttings efficiency reaches 1.54 ~ 3.10kg/1000kJ, evaporating waste water efficiency reaches 2.00 ~ 4.20kg/1000kJ.
Completed the operation of the innoxious washing tail gas of drilling wastes by tail gas siccative collector 3, spray type dust separator 8, feeding spraying pump 9 and connecting tube simultaneously; Vertical elevator 4 siccative entrance is connected with tail gas siccative collector 3 drier outlet, vertical elevator 4 drier outlet is connected with spiral conveyor 7 respectively at mixing agitator 5, the distribution of mummification drilling cuttings between mixing agitator 5 and spiral conveyor 7 can be adjusted as required, mixing agitator 5 top is provided with drilling fluid distributor 6, can adjust as required drilling well give up slurry be distributed to the drilling cuttings wet feed being uniformly mixed to form moisture≤10% in mixing agitator 5 with the drilling cuttings of mummification, innoxious through high temperature after mummification again, complete drilling well give up slurry innoxious.The combustion type hot air stove of a quantity of heat given up 2,500,000 kilocalories/h, can innoxious drilling cuttings 16293kg/h, simultaneously innoxious governance solid content 20 ~ 40% (v/v), density 1600 ~ 2200kg/m
3drilling well to give up slurry 1472 ~ 2697kg/h, or evaporate decrement well-drilling waste water 736kg/h, total additionaling power consumption is no more than 50kW simultaneously.The present invention adopts the method for physics to administer drilling wastes completely, eliminates the hidden danger of drilling wastes contaminated environment completely.
Appended drawings is the complete Harmless and Comprehensive Disposal system of drilling wastes provided by the present invention and device schematic diagram.In figure: 1-combustion type hot air stove; 1-1-combustion chamber of hot-blast stove; 1-2-hot-blast stove hot room; 2-rotary shelf drier; 3-tail gas siccative collector; 4-vertical elevator; 5-mixing agitator; 6-drilling fluid distributor; 7-spiral conveyor; 8-spray type dust separator; 9-feeding spraying pump; 10-air-introduced machine; 11-drilling fluid pump;
Detailed description of the invention below in conjunction with but be not limited to embodiment set forth detailed description of the invention
Embodiment 1: the combustion type hot air stove of quantity of heat given up 2,500,000 kilocalories/h, can innoxious drilling cuttings 16293kg/h, simultaneously innoxious governance solid content 20 ~ 40% (v/v), density 1600 ~ 2200kg/m
3drilling well to give up slurry 1472 ~ 2697kg/h, or evaporate decrement well-drilling waste water 736kg/h simultaneously.
Adopt fire coal Thorough combustion in burning coal furnace, control fire box temperature 900 ~ 1000 DEG C, adopt frequency converting induced draft fan 10 to adjust draught flow rate 2000 ~ 5000m
3/ h, control rotary shelf drier 2 hot blast temperature 500 ~ 800 DEG C, drilling cuttings is put in mixing agitator 5 with operating rate 8500 ~ 13000kg/h, stirring migration to end through mixing agitator 5 to be entered swinging drying oven 2 in and the hot blast co-current contact heat and mass of 500 ~ 800 DEG C finally forms mummification drilling cuttings, solid content 40% (v/v), density 2200kg/m by self gravitation
3drilling fluid be pumped to drilling fluid distributor 6 by 0.30 ~ 0-59m by drilling fluid pump 11 through pipe fitting
3the input speed of/h slurry that drilling well given up is thoroughly mixed to form drilling cuttings wet feed with the mummification drilling cuttings siccative returned, control moisture≤10% of drilling cuttings wet feed, operating rate 8500kg/h, drilling cuttings wet feed fully mixes and migrates in mixing and blending machine 5, migration to mixing and blending machine 5 end enters in rotary shelf drier 2 by self gravitation, drilling cuttings wet feed in rotary shelf drier 2 migration while with hot blast co-current contact heat and mass, hot blast heat transfer is lowered the temperature and takes away moisture, drilling cuttings wet feed heat absorption mass transfer moisture content reduces, form moisture content≤1.0%, the mummification drilling cuttings of temperature of charge 180 ~ 360 DEG C, finally migrating to tail gas siccative collector 3 enters in the rewinding funnel of vertical elevator 4, as required: a part of mummification drilling cuttings is promoted through vertical elevator 4, and entering in mixing agitator 5 rewinding funnel gives up to starch with drilling well mixes, the migration of its mix and blend to be entered in rotary shelf drier 2 by self gravitation to mixing agitator 5 end and forms mummification drilling cuttings with hot blast mass-and heat-transfer by mixing agitator 5, part mummification drilling cuttings is promoted through vertical elevator 4 to be entered in spiral conveyor 7 rewinding funnel, and spiral conveyor 7 is migrated and to be entered intensification in hot-blast stove hot room 1-2 by self gravitation to end and reach more than 450 DEG C and make solid phase particles form innoxious solid waste through high-temperature oxydation to discharge innoxious system.Be cooled to 120 ~ 380 DEG C of tail gas containing moisture, enter in spray type dust separator 8 Yu by the waste water of feeding spraying pump 9 pumping through tail gas siccative collector 3 offgas outlet and form cross-current mass-and heat-transfer, waste water heat absorption evaporation decrement, tail gas heat release is purified and the aqueous phase taken away in waste water is discharged through air-introduced machine 10.Thus set up drilling wastes (waste water, useless slurry, waste residue) innoxious comprehensive regulation circulation, realize continuous innoxious drilling cuttings 16293kg/h, simultaneously innoxious governance solid content 20 ~ 40% (v/v), density 1600 ~ 2200kg/m
3drilling well to give up slurry 1472 ~ 2697kg/h, or evaporate decrement well-drilling waste water 736kg/h simultaneously.
Embodiment 2: the coal-fired hot-blast stove of efficiency of fire coal 300kg/h, can harmless treatment oil-based drill cuttings 200kg/h, innoxious drilling cuttings 10700kg/h, simultaneously innoxious governance solid content 20 ~ 40% (v/v), density 1600 ~ 2200kg/m
3drilling well to give up slurry 967 ~ 1771kg/h, or evaporate decrement well-drilling waste water 483kg/h simultaneously.
Oil-based drill cuttings and fine coal add 5% binding agent again and fully mix rear formation fuel combination or be pressed into moulded coal, oil-based drill cuttings oil content 6.02% in the ratio of 4: 6, its caloric value 2.94 ~ 3.89MJ/kg.Fuel combination or moulded coal Thorough combustion in hot-blast stove, controls fire box temperature 700 ~ 950 DEG C, adopts frequency converting induced draft fan 10 to adjust draught flow rate 2000 ~ 5000m
3/ h, control hot blast temperature 500 ~ 800 DEG C in rotary shelf drier 2, drilling cuttings is put in mixing agitator 5 with operating rate 8000 ~ 10000kg/h, stirring migration to end through mixing agitator 5 to be entered swinging drying oven 2 in and the hot blast co-current contact heat and mass of 500 ~ 800 DEG C finally forms mummification drilling cuttings, solid content 40% (v/v), density 2200kg/m by self gravitation
3drilling fluid be pumped to drilling fluid distributor 6 by 0.26 ~ 0-45m by drilling fluid pump 11 through pipe fitting
3the input speed of/h slurry that drilling well given up is thoroughly mixed to form drilling cuttings wet feed with the mummification drilling cuttings siccative returned, control moisture≤10% of drilling cuttings wet feed, operating rate 7500kg/h, drilling cuttings wet feed fully mixes and migrates in mixing and blending machine 5, migration to mixing and blending machine 5 end enters in rotary shelf drier 2 by self gravitation, drilling cuttings wet feed in rotary shelf drier 2 migration while with hot blast co-current contact heat and mass, hot blast heat transfer is lowered the temperature and takes away moisture, drilling cuttings wet feed heat absorption mass transfer moisture content reduces, form moisture content≤1.0%, the mummification drilling cuttings of temperature of charge 180 ~ 360 DEG C, finally migrating to tail gas siccative collector 3 enters in the rewinding funnel of vertical elevator 4, as required: a part of mummification drilling cuttings is promoted through vertical elevator 4, and entering in mixing agitator 5 rewinding funnel gives up to starch with drilling well mixes, its mix and blend migration to mixing agitator 5 end to be entered by self gravitation and forms thousand with hot blast mass-and heat-transfer in rotary shelf drier 2 and change drilling cuttings by mixing agitator 5, part mummification drilling cuttings is promoted through vertical elevator 4 to be entered in spiral conveyor 7 rewinding funnel, and spiral conveyor 7 is migrated and to be entered intensification in hot-blast stove hot room 1-2 by self gravitation to end and reach more than 450 DEG C and make solid phase particles form innoxious solid waste through high-temperature oxydation to discharge innoxious system.Be cooled to 120 ~ 380 DEG C of tail gas containing moisture, enter in spray type dust separator 8 Yu by the waste water of feeding spraying pump 9 pumping through tail gas siccative collector 3 offgas outlet and form cross-current mass-and heat-transfer, waste water heat absorption evaporation decrement, tail gas heat release is purified and the aqueous phase taken away in waste water is discharged through air-introduced machine 10.Thus set up drilling wastes (waste water, useless slurry, waste residue) innoxious comprehensive regulation circulation, realize continuous innoxious drilling cuttings 16293kg/h, simultaneously innoxious governance solid content 20 ~ 40% (v/v), density 1600 ~ 2200kg/m
3drilling well to give up slurry 967 ~ 1771kg/h, or evaporate decrement well-drilling waste water 483kg/h simultaneously.
Claims (6)
1. a drilling wastes (waste water, useless slurry, drilling cuttings) complete innocent comprehensive approach method, utilize the thermal source that fuel produces in Combustion of Hot Air Furnace, the hot gas of burning is carrier gas, the drill chip innocent crossed by mud soak is made by pyrolytic, utilize the thermal source that a tail gas after pyrolytic is mummification preheating drilling cuttings, the useless slurry of drilling well and the mixed wet stock of mummification drilling cuttings and tail gas are in swinging drying oven and flow transmission of heat by contact mass transfer, drilling cuttings after mummification preheating makes it innoxious through pyrolytic again, the secondary tail gas that tail gas is formed after mummification preheating drilling cuttings and well-drilling waste water form cross-current mass-and heat-transfer, the aqueous phase in waste water is taken away in the heat release of secondary tail gas, the method of waste water heat absorption cleaning of off-gas and process integration,
Utilize the heat energy that fuel produces in Combustion of Hot Air Furnace, take the innoxious drilling cuttings of pyrolytic, pre-heat drying is given up and is starched the wet feed that mixes with mummification drilling cuttings, the method of evaporation well-drilling waste water, the hot blast of any temperature between 500 DEG C ~ 800 DEG C that it is characterized in that utilizing fuel combustion to provide, hot blast wind speed is any value between 2000 cubes ms/h ~ 5000 cubes ms/h, drilling well is useless starches with the mixed wet stock of mummification drilling cuttings and a tail gas and flows transmission of heat by contact mass transfer, a tail gas is lowered the temperature and is taken away steam and is converted to secondary tail gas, wet stock heat absorption moisture evaporation moisture content reduces, finally heating up in hot-blast stove, it is innoxious to reach solid phase particles.Innoxious drilling cuttings efficiency reaches 1.54 ~ 3.10kg/1000kJ, evaporating waste water efficiency reaches 2.00 ~ 4.20kg/1000kJ.Total additionaling power consumption is no more than 50kW;
Integrated formation drilling wastes (waste water, useless slurry, the drilling cuttings) innocent comprehensive approach method completely of said method.
2. the heat energy utilizing fuel to produce in Combustion of Hot Air Furnace according to claim 1, the method of complete innoxious drilling wastes, it is characterized in that utilizing frequency converting induced draft fan to adjust swinging drying oven inner drying hot blast wind speed is any value between 2000 cubes ms/h ~ 5000 cubes ms/h, control the hot blast of any temperature in swinging drying oven between 500 DEG C ~ 800 DEG C, realize drilling wastes (waste water, useless slurry, drilling cuttings) Harmless and Comprehensive Disposal completely.
3. the heat energy utilizing fuel to produce in Combustion of Hot Air Furnace according to claim 1, the method of complete innoxious drilling wastes, it is characterized in that utilizing as burn oil-based drill cuttings and fine coal in 4: 6 ratio add 5% binding agent again and fully mix and mix fire coal or be pressed into the various fuel such as moulded coal and burning coal, crude oil, diesel oil, natural gas, for the innoxious drilling wastes of high temperature provides heat energy afterwards.
4. the heat energy utilizing fuel to produce in Combustion of Hot Air Furnace according to claim 1, the method of innoxious drilling wastes, it is characterized in that utilizing the drilling cuttings siccative of mummification to return giving up with drilling well the wet feed starched and be uniformly mixed to form moisture≤10%, operating rate 8500 ~ 16000kg/h, and stream and hot blast transmission of heat by contact mass transfer, hot blast heat transfer is lowered the temperature and takes away moisture, drilling cuttings wet feed heat absorption mass transfer moisture content reduces, form moisture content≤1%, the drilling cuttings siccative of temperature of charge 180 ~ 360 DEG C enters in hot-blast stove hot room with particle or powder morphology and is warming up to more than 450 DEG C and reaches innoxious.
5. the heat energy utilizing fuel to produce in Combustion of Hot Air Furnace according to claim 1, the method for complete innoxious drilling wastes, is characterized in that solid content 15 ~ 40% (v/v), density 1200 ~ 2200kg/m
3the useless slurry of drilling well through pipe fitting by 0.30 ~ 0.59m
3the wet feed of moisture≤10% that the input rate distribution of/h is uniformly mixed to form with drilling cuttings siccative in mixing agitator, enters in swinging drying oven and forms moisture content≤1%, that the drilling cuttings siccative of temperature of charge 180 ~ 360 DEG C enters high-temperature oxydation district high temperature with particle or powder morphology is innoxious.
6. the heat energy utilizing fuel to produce in Combustion of Hot Air Furnace according to claim 1, the method of complete innoxious drilling wastes, it is characterized in that high-temperature oxydation district hot blast temperature 500 ~ 800 DEG C in control combustion hot-blast stove, make the organic matter high-temperature oxydation in the siccative drilling cuttings of moisture content≤1%, temperature of charge 180 ~ 360 DEG C, form the innoxious drilling cuttings of moisture content≤0.6%, temperature of charge 450 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296266A (en) * | 2018-02-01 | 2018-07-20 | 中国石油天然气集团有限公司 | A kind of drilling wastes processing system and method |
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