CN102757143B - Well drilling wastewater flocculation precipitation treatment device and wastewater treating method - Google Patents
Well drilling wastewater flocculation precipitation treatment device and wastewater treating method Download PDFInfo
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- CN102757143B CN102757143B CN201210288633.8A CN201210288633A CN102757143B CN 102757143 B CN102757143 B CN 102757143B CN 201210288633 A CN201210288633 A CN 201210288633A CN 102757143 B CN102757143 B CN 102757143B
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Abstract
The invention relates to a well drilling wastewater flocculation precipitation treatment device. The device comprises a flocculation reaction tank, a flocculation settling basin and an intermediate tank, the flocculation reaction tank is provided with a stirring device, the flocculation settling basin and the intermediate tank are arranged on a well site, the flocculation reaction tank is provided with a water feeding port, a chemical feed port and a water discharge port, the water feeding port, the chemical feed port and the water discharge port are communicated to the outside, a communication valve is arranged between the flocculation settling basin and the intermediate tank, a first water pump is disposed between the flocculation settling basin and the flocculation reaction tank, the flocculation settling basin is communicated with a water inlet end of the first water pump, a water outlet end of the first water pump is communicated with the flocculation reaction tank, the flocculation reaction tank is communicated with the flocculation settling basin and the intermediate tank which are arranged on the well site to form a water circulation to collaboratively store water bodies, defects that the transportation is difficult, and uniform stirring is hardly achieved when the flocculation reaction tank is oversize are overcome, the required volume of the flocculation settling basin is reduced, besides, the water bodies formed by well drilling wastewater and flocculating agents are maintained in a flow state all the time, and the dissolving efficiency of the flocculating agents is improved.
Description
Technical field
The present invention relates to a kind of waste disposal plant and sewage water treatment method, especially a kind of well-drilling waste water flocculation sediment treatment unit and utilize this device to process the method for waste water.
Background technology
In the process of oilfield drilling, the loss of mud during due to tripping operation is, the waste water that the mud on the seepage of mud circulating system, flushing uphole equipment and drilling tool and greasy dirt form is called well-drilling waste water.Well-drilling waste water is the important source of pollution of petroleum prospecting enterprise, and well-drilling waste water has the features such as a little many, wide, pollutant kind is complicated, high stability, intermittent discharge and the more difficult control of discharge, is that petroleum industry is compared with one of water pollution source of unmanageable and disposal.
Well-drilling waste water contains the various ingredients in mud, form complicated, principal pollutant have suspended substance, heavy metal, oil, phenol, sulfide etc., well-drilling waste water totally has that colourity is high, suspension content is high, CODcr value is high, the feature that its organic biodegradability is poor, pollutent mainly contains following several:
(1) CODcr: from various organic sludge treatment agents and tensio-active agent as tannin, pore forming material and defoamer etc.;
(2) oil: from oil-base mud, diesel coolant, drilling unit wash-down water etc.;
(3) heavy metal.
Prior art adopts the mode of flocculation to purify conventionally, process well-drilling waste water, refer in < < oilfield chemistry > > on December 25th, 2002 the 387th page～390 pages disclosed document < < well-drilling waste waters and acid fracturing operation wastewater Processing Technology Research progress > >, large for mobility, cycle is short, waste water quality changes well-drilling waste water greatly, conventionally adopt flocculation, sedimentation, filter, the modes such as absorption are processed, as the disclosed well-drilling waste water treatment process for the treatment of process > > of the application number poly-sulphur mud drilling waste water of Chinese invention patent < < deep-well that is 201010209919.3, by flocculation, and be aided with adsorption and oxidation technique the impurity in well-drilling waste water is more efficiently removed.
The research recycling after processing for well-drilling waste water at present still belongs to blank at home, well-drilling waste water process after for slurry be the main application of well-drilling waste water, drilling well water with slurry there is no national standard at present, requires chroma in waste water need be less than 300, to CODcr no requirement (NR) during wellbore construction.Because drilling depth is darker, the well-drilling waste water amount producing is larger, in waste water, contain a large amount of suspended substances and oily substance, colourity is greater than 5000, waste water COD cr10000～40000mg/L, and good stability, mud-water separation difficulty, cause the considerable part sewage can not reuse, must build enough ponds and store drilling waste water.
Conventionally there is following weak point in the existing device that utilizes flocculence to process well-drilling waste water:
1, flocculation agent use-pattern is generally to the wastewater disposal basin of storage well-drilling waste water and directly adds flocculation agent, well-drilling waste water reacts in wastewater disposal basin with flocculation agent, because wastewater disposal basin is built at situ of drilling well temporarily, whipping appts is not installed conventionally, flocculation agent and well-drilling waste water reaction times are longer, and have the inadequate problem of reaction.
2, when adding as low solubility flocculation agents such as white limes, because its solubleness is low, conventionally need add excessive flocculation agent, a large amount of flocculation agents are deposited in wastewater disposal basin, have both caused flocculation agent waste, have taken again wastewater disposal basin pond and have held.
3, due to the soluble material containing in well-drilling waste water compared with multipolarity, only adopting conventional flocculation agent to process well-drilling waste water is difficult to the pollutent in waste water and colourity effectively to be processed, well-drilling waste water after processing can not meet the requirement of wellbore construction, can not reuse.
The storage pool of revising when 4, oil-gas field is processed well-drilling waste water within the drilling well phase at present need take a large amount of surrounding grounds, causes project cost of land too high, and the Sewage Environment Pollution risk of storage is large.
Summary of the invention
The technical problem that the present invention solves is to overcome the above-mentioned deficiency of prior art, and the well-drilling waste water flocculation sediment that a kind of land occupation is few, flocculation agent utilising efficiency is high, treatment effect is good treatment unit is provided.Further, the well-drilling waste water after processing can be back to wellbore construction.
For solving the problems of the technologies described above, the invention provides following technical scheme: a kind of well-drilling waste water flocculation sediment treatment unit, comprise the flocculation reaction tank that is provided with whipping appts and flocculating settling pond and the intermediate pool that is arranged at well site, described flocculation reaction tank is provided with and is communicated to outside admission port, dosing mouth and water port, between described flocculation sedimentation tank and intermediate pool, is provided with communicating valve, between described flocculating settling pond and flocculation reaction tank, be provided with the first water pump, described flocculating settling pond is communicated with the feed-water end of the first water pump, and the water side of described the first water pump is communicated with described flocculation reaction tank, between described intermediate pool and flocculation reaction tank, be provided with the second water pump and electrofloatation device, described electrofloatation device comprises housing, in described housing, be provided with at least two pole plates, described pole plate is connected with the pulse power, described pole plate is installed on housing middle part, between described pole plate bottom and housing bottom inwall, leave spacing, formation electrolysis zone, described housing internal polar plate region, the pitch area that is positioned at below, electrolysis zone in described housing is contraminated zone, the region that is positioned at top, electrolysis zone in described housing is clean water area, described intermediate pool is communicated with the feed-water end of the second water pump, the water side of described the second water pump is communicated with the contraminated zone of electrofloatation device, the clean water area of described electrofloatation device is communicated with flocculation reaction tank.
Adopt such structure, by flocculation reaction tank is communicated with to formation water cycle with the flocculating settling pond and the intermediate pool that are arranged at well site, the collaborative water body that stores, slow down flocculation reaction tank volume and be difficult to transportation when excessive, the defect that is difficult to stir, also reduced the required volume of flocculation sedimentation tank, and, the water body that well-drilling waste water and flocculation agent form is always in flow state, improved the dissolved efficiency of flocculation agent, and reach default equilibrium concentration after several times circulation, improved the utilization ratio of the flocculation agent of slightly soluble or indissoluble, waste water electrolysis and physics sedimentation in electrofloatation device are carried out simultaneously, significantly improved cleaning water, and the waste water Semi-polarity material modification under electrochemical action after processing, flocculation agent be can again add and organism and colourity further removed, recovering and reutilizing waste water after processing is in wellbore construction.
Preferably, the angle of described pole plate and housing bottom surface is 55 °～65 °, and the frequency of the described pulse power is 20kHz～25kHz.For the fine particle forming after tiny solid impurity in well-drilling waste water and impurity metal ion electrolysis, be easily adsorbed in the problem on pole plate, pole plate is obliquely installed and is aided with the vibrations of high-frequency pulse power supply with the 55 °～oblique angle of 65 °, impurity shakes and comes off and be settled down to contraminated zone with the landing of taking advantage of a situation of the oblique angle of pole plate on pole plate, has avoided the accumulation of impurity on pole plate.
Preferably, described flocculation reaction tank comprises the first tank body and the second tank body, described admission port is arranged at the top of the first tank body, described whipping appts is arranged in the first tank body, between described the first tank body and the second tank body, be provided with middle siphunculus, one end of described middle siphunculus is communicated to the inside of the first tank body by the side of the first tank body, the other end of described middle siphunculus is communicated to the inside of the second tank body by the top of the second tank body, described water port is arranged at the side of the second tank body, on described the second tank body, be provided with secondary reaction water-in, described secondary reaction water-in is arranged at the side of the second tank body, and be tangentially communicated to the inside of the second tank body, between described secondary reaction water-in and the water outlet of water pump, be provided with the second water inlet pipe.
Described flocculating settling pond comprises landwaste pond and the muddy water pond that is arranged at well site, a described landwaste pond side adjacent with muddy water pond is provided with at least one connected entrance, described landwaste pond is provided with into water ramp away from a side in muddy water pond, the bottom surface in described landwaste pond is downward-sloping to the direction of connected entrance along water inlet ramp, the bottom in described muddy water pond is tapered, it is inner that the feed-water end of described the first water pump is communicated to muddy water pond, and described water port is communicated with flocculating settling pond.
Preferably, described dosing mouth is connected with dispensation apparatus by dosing pipe, described dispensation apparatus comprises the first dispensing canister and the second dispensing canister, described the first dispensing canister upper top is provided with clear water import and Imported Medicines, described the second dispensing canister is arranged at the below of the first dispensing canister, in described the first dispensing canister, be provided with mixed medicine agitator, between described the first dispensing canister and the second dispensing canister, be provided with liquid transfer lime, the sidewall of described the second dispensing canister is provided with medicine liquid outlet, and described medicine liquid outlet is communicated with the dosing mouth of flocculation reaction tank.
Preferably, between the dosing mouth of described medicine liquid outlet and flocculation reaction tank, be provided with secondary back pipeline, described secondary back pipeline comprises the first ball valve and the second ball valve, and the input terminus of the input terminus of described the first ball valve, the second ball valve is all communicated to the inside of the second dispensing canister; The output terminal of described the first ball valve is connected with the first plunger metering pump, the output terminal of described the first plunger metering pump is parallel with delivery conduit and the first return line, described delivery conduit is communicated with the output terminal of the first plunger metering pump with the dosing mouth of flocculation reaction tank, described the first return line is by the internal communication of the output terminal of described the first plunger metering pump and the second dispensing canister; The output terminal of described the second ball valve is connected with the second plunger metering pump, between the output terminal of described the second plunger metering pump and the second dispensing canister, be provided with the second return line, described the second return line is by the output terminal of the second plunger metering pump and the second dispensing canister internal communication.
Preferably, described well site is provided with skid body, and described skid body is hollow casing, and it is inner that described flocculation reaction tank, electrofloatation device and dispensation apparatus are all arranged at skid body, described skid body bottom is provided with at least two support posts, between described support post, is provided with stull.
Utilize above-mentioned well-drilling waste water cyclic processing device to process a method for well-drilling waste water, comprise following step:
A, by admission port and dosing mouth, well-drilling waste water and coagulating agent are directed in the first tank body, the whipping appts starting on flocculation reaction tank is uniformly mixed well-drilling waste water and coagulating agent, the mixed solution of well-drilling waste water and coagulating agent is by middle siphunculus overflow to the second tank body, and the water outlet overflow by being arranged at the second tank body side is to flocculating settling pond;
B, liquid in flocculating settling pond standing 12～16 hours;
C, unlatching are arranged at the communicating valve between flocculation sedimentation tank and intermediate pool, with the second water pump, the liquid in intermediate pool are pumped in the contraminated zone of electrofloatation device;
D, starting impulse power supply, electrolysis also makes the sedimentation of sewage physics;
E, the liquid in clean water area is directed in flocculation reaction tank, by the liquid return in contraminated zone after in flocculating settling pond standing 12～16 hours, unlatching is arranged at the communicating valve between flocculation sedimentation tank and intermediate pool, and the supernatant liquid of flocculation sedimentation tank is imported to intermediate pool.In this step, by dosing mouth, coagulating agent is directed in the first tank body, the whipping appts starting on flocculation reaction tank is uniformly mixed liquid and coagulating agent, the mixed solution of liquid and coagulating agent is by middle siphunculus overflow to the second tank body, and the water outlet overflow by being arranged at the second tank body side is to flocculating settling pond;
Preferably, after step e, liquid in intermediate pool is back to wellbore construction; In this step, the liquid in intermediate pool, after sedimentation and flocculation, is back to wellbore construction by the supernatant liquid of flocculation sedimentation tank, and water quality certain mass promotes, and can be back to wellbore construction, as the water source of the work such as flushing.
Preferably, in described step a, described coagulating agent comprises the component of following mass ratio: 2～4 parts, 0.01～0.12 part of polyacrylamide, calcium hydroxide or 1～3 part, calcium oxide, ferric sulfate or ferrous sulfate.
Said components is to draw through the long-term great many of experiments of contriver, good for the treatment of poly-sulphur mud sewage coagulation effect.Calcium hydroxide or calcium oxide can provide flocculation nucleus for the colloid in poly-sulphur mud sewage.Calcium hydroxide or calcium oxide are soluble in water, and the adding of ferric sulfate or ferrous sulfate, the iron ion providing or ferrous ion are combined with hydroxide radical and are formed ironic hydroxide or ferrous hydroxide colloid, the suspended substance that can effectively flocculate in sewage.Part calcium ion can be combined by the sulfonic group in poly-sulphur mud, effectively makes poly-sulfonic acid substance flocculation, and part calcium ion and sulfate radical are produced precipitation, form new flocculation nucleus.Add polyacrylamide can accelerate precipitation.Adopt the coagulating agent of the poly-sulphur mud sewage of processing provided by the invention to process poly-sulphur mud sewage, after calcium hydroxide or calcium oxide are water-soluble, discharge calcium ion and hydroxide ion, hydroxide radical raises pH, alkaline environment can make the iron ion or the ferrous ion that add generate ferrous hydroxide or ferric hydroxide colloid, in part calcium ion and water, poly-sulphur salt binding is produced precipitation or complex compound, destroy the poly-sulphur system of well-drilling waste water, thereby effectively allow poly-turning property of sulphur system in well-drilling waste water, separated with water.COD of sewage Cr and chroma removal rate after processing are improved significantly, and auxiliary with after electrofloatation processing, by twice dosing coagulant, CODCr clearance reaches as high as 92%, and maximum chroma clearance reaches as high as 96%.
Compared with prior art, beneficial effect of the present invention is as follows:
1, by flocculation reaction tank is communicated with to formation water cycle with the flocculating settling pond and the intermediate pool that are arranged at well site, the collaborative water body that stores, slow down flocculation reaction tank volume and be difficult to transportation when excessive, the defect that is difficult to stir, also reduced the required volume of flocculation sedimentation tank, and, the water body that well-drilling waste water and flocculation agent form is always in flow state, improved the dissolved efficiency of flocculation agent, and reach default equilibrium concentration after several times circulation, improved the utilization ratio of the flocculation agent of slightly soluble or indissoluble, waste water electrolysis and physics sedimentation in electrofloatation device are carried out simultaneously, significantly improved cleaning water, and the waste water Semi-polarity material modification under electrochemical action after processing, flocculation agent be can again add and organism and colourity further removed, recovering and reutilizing waste water after processing is in drilling well water with slurry, also can carry out next step advanced treatment to qualified discharge.
2, reduce greatly well-drilling waste water floor space: well site, after the landwaste pond of building this treatment process necessity, muddy water pond, flocculating settling pond, intermediate pool, does not need to repair the sewage storage pool of larger volume, and this will greatly reduce the cost of land of drilling operation.
3, reduce clear water usage quantity and the complete rear residue wastewater flow rate of drilling well: drilling water more than 90% needs with clear water at present, only approximately 10% well-drilling waste water has obtained recycling, in some water-deficient areas, this has greatly restricted carrying out of drilling well work, adopt after this art breading well-drilling waste water, approximately 90% well-drilling waste water has obtained recycling, and only needs to supplement approximately 10% clear water, has reduced greatly the demand to clear water.After drilling well completion, remaining waste water is only a small amount of waste water that in last treatment cycle, drilling well produces, and can be pulled to after treatment next situ of drilling well and cook water with slurry simultaneously, also can be transported to and concentrate sewage works to process rear discharge up to standard.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the present invention;
Fig. 2 is the structural representation of flocculation reaction tank in the present invention;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structural representation of chemicals dosing plant in the present invention;
Fig. 5 is the structural representation of a kind of embodiment in flocculating settling pond in the present invention;
Fig. 6 is the structural representation of electrofloatation device in the present invention.
Reference numeral is as follows: flocculation reaction tank-1; Admission port-1a; Dosing mouth-1b; Water port-1c; The first tank body-101; The second tank body-102; Whipping appts-2; Flocculating settling pond-3; Intermediate pool-4; The first water pump-5; The second water pump-6; Middle siphunculus-7; Secondary reaction water-in-8; Secondary water inlet pipe-9; Electrofloatation device-10; Contraminated zone-10b; Clean water area-10c; Housing-10d; Pole plate-10e; The first dispensing canister-11; Clear water import-11a; Imported Medicines-11b; Mixed medicine agitator-11c; The second dispensing canister-12; Medicine liquid outlet-12a; Liquid transfer lime-13; Secondary back pipeline-14; The first ball valve-15a; The second ball valve-15b; The first plunger metering pump-16a; The second plunger metering pump-16b; Delivery conduit-17; The first return line-18a; The second return line-18b; Skid body-19; Support post-20; Stull-21; Landwaste pond-22; Muddy water pond-23; Connected entrance-24; Water inlet ramp-25.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Embodiments of the present invention are not limited to following examples, within the various variations of making under the prerequisite that does not depart from aim of the present invention all belong to protection scope of the present invention.
Embodiment 1
As shown in Figures 1 to 6, flocculating settling pond 3 and intermediate pool 4 that the present embodiment well-drilling waste water flocculation sediment treatment unit is provided with the flocculation reaction tank 1 of whipping appts 2 and is arranged at well site, flocculation reaction tank 1 is provided with and is communicated to outside admission port 1a, dosing mouth 1b and water port 1c, between described flocculation sedimentation tank and intermediate pool 4, be provided with communicating valve, the two ends of communicating valve are communicated with the top water body of flocculation sedimentation tank with intermediate pool 4, in flocculation sedimentation tank liquid level higher and open communicating valve after, the liquid communication in flocculation sedimentation tank is to intermediate pool 4.Between described flocculating settling pond 3 and flocculation reaction tank 1, be provided with the first water pump 5, described flocculating settling pond 3 is communicated with the feed-water end of the first water pump 5, the water side of described the first water pump 5 is communicated with described flocculation reaction tank 1, after flocculation sedimentation tank is communicated with flocculation reaction tank 1, flocculation reaction tank 1 is communicated with the collaborative water body that stores of formation water cycle with the flocculating settling pond 3 that is arranged at well site, while having avoided independent dependence flocculation reaction tank 1 water storage, excessive being difficult to of flocculation reaction tank 1 volume transports, internal liquid stirs the large problem of difficulty, while also having slowed down independent dependence flocculation sedimentation tank water storage, take well site larger area, and, in the circulating water system of flocculation sedimentation tank and flocculation reaction tank 1 composition, the water body that well-drilling waste water and flocculation agent form is always in flow state, improved the dissolved efficiency of flocculation agent, and reach default equilibrium concentration after several times circulation, improved the utilization ratio of the flocculation agent of slightly soluble or indissoluble.Between described intermediate pool 4 and flocculation reaction tank 1, be provided with the second water pump 6 and electrofloatation device 10, described electrofloatation device 10 comprises housing 10d, in described housing 10d, be provided with at least two pole plate 10e, described pole plate 10e is connected with the pulse power, described pole plate 10e is installed on housing 10d middle part, between described pole plate 10e bottom and housing 10d bottom interior wall, leave spacing, formation electrolysis zone, described housing 10d internal polar plate 10e region, the pitch area that is positioned at below, electrolysis zone in described housing 10d is contraminated zone 10b, the region that is positioned at top, electrolysis zone in described housing 10d is clean water area 10c, described intermediate pool 4 is communicated with the feed-water end of the second water pump 6, the water side of described the second water pump 6 is communicated with the contraminated zone 10b of electrofloatation device 10, the clean water area 10c of described electrofloatation device 10 is communicated with flocculation reaction tank 1, waste water carries out in the interior electrolysis of electrofloatation device 10 and physics sedimentation simultaneously, significantly improved cleaning water, and the waste water Semi-polarity material modification under electrochemical action after processing, flocculation agent be can again add and organism and colourity further removed, recovering and reutilizing waste water after processing is in wellbore construction.
In the present embodiment, the angle of pole plate 10e and housing 10d bottom surface is 55 °, the frequency of the pulse power is 20kHz, pole plate 10e is obliquely installed and is aided with the vibrations of the high-frequency pulse power supply of 20kHz with the oblique angle of 55 °, impurity shakes and comes off and be settled down to contraminated zone 10b with the landing of taking advantage of a situation of the oblique angle of pole plate 10e on pole plate 10e, has avoided the accumulation of the upper impurity of pole plate 10e.
As shown in Figures 1 to 6, in the present embodiment, flocculation reaction tank 1 comprises the first tank body 101 and the second tank body 102, described admission port 1a is arranged at the top of the first tank body 101, described whipping appts 2 is arranged in the first tank body 101, between described the first tank body 101 and the second tank body 102, be provided with middle siphunculus 7, one end of described middle siphunculus 7 is communicated to the inside of the first tank body 101 by the side of the first tank body 101, the other end of described middle siphunculus 7 is communicated to the inside of the second tank body 102 by the top of the second tank body 102, described water port 1c is arranged at the side of the second tank body 102, on described the second tank body 102, be provided with secondary reaction water-in 8, described secondary reaction water-in 8 is arranged at the side of the second tank body 102, and be tangentially communicated to the inside of the second tank body 102, between described secondary reaction water-in 8 and the water outlet of water pump, be provided with secondary water inlet pipe 9.Adopt such structure, not only guaranteed that slightly soluble or indissoluble medicine fully stir, but also can after mixing, be spilled over to the interior further slowly-releasing of the second dispensing canister 12 in the first dispensing canister 11, when having guaranteed the first dispensing canister 11 interior liquid fluidity, increased the dissolution time of coagulating agent in water body and dissolved probability.
In the present embodiment, the angle of pole plate 10e and housing 10d bottom surface is 65 °, and the frequency of the pulse power is 25kHz.All the other structures refer to embodiment 1.
Utilize the present embodiment well-drilling waste water cyclic processing device to process the method for well-drilling waste water, comprise following step:
A, by admission port 1a and dosing mouth 1b, well-drilling waste water and coagulating agent are directed in the first tank body 101, the 2 pairs of well-drilling waste waters of whipping appts and the coagulating agent that start on flocculation reaction tank 1 are uniformly mixed, the mixed solution of well-drilling waste water and coagulating agent is by middle siphunculus 7 overflow to the second tank bodies 102, and the water outlet overflow by being arranged at the second tank body 102 sides is to flocculating settling pond 3;
B, liquid in flocculating settling pond 3 interior standing 12 hours;
C, unlatching are arranged at the communicating valve between flocculation sedimentation tank and intermediate pool 4, with the second water pump 6, the liquid in intermediate pool 4 are pumped in the contraminated zone 10b of electrofloatation device 10;
D, starting impulse power supply, electrolysis also makes the sedimentation of sewage physics;
E, the liquid in the 10c of clean water area is directed in flocculation reaction tank 1, by the liquid return in the 10b of contraminated zone in flocculating settling pond 3 standing 12 hours;
F, the supernatant liquid in intermediate pool 4 is back to wellbore construction.
In the step a of the present embodiment, first calcium hydroxide or calcium oxide are added in pending poly-sulphur mud sewage with powder or solution form, be uniformly mixed 5～15 minutes, again ferric sulfate or ferrous sulfate are added in the sewage after above-mentioned processing, stir flocculation 5～15 minutes, finally, in the sewage after above-mentioned steps is processed, add polyacrylamide.Lower embodiment all adopts aforesaid method to gather the sewage disposal of sulphur mud.Get drilling waste water analysis, obtain sewage related data, adopt after poly-sulphur mud provided by the invention sewage disposal, treatment process adopts the method in embodiment, the related data of the sewage after analyzing and processing, concrete, choose the poly-sulphur mud sewage sample I1L in somewhere, Sichuan, analyze the CODCr in sewage and measure colourity by extension rate method, then the coagulating agent that is sequentially added into the poly-sulphur mud sewage of processing provided by the invention is processed it, wherein calcium hydroxide add-on is 8g, ferrous sulfate add-on is 17.5g, and then add 100mg polyacrylamide to process to the sewage after processing by above-mentioned treatment step, sewage index after analyzing and processing is as shown in table 1.
Table 1 is parameter comparison table before and after the present embodiment sewage disposal
Embodiment 3
As shown in Figures 1 to 6, described in the present embodiment well-drilling waste water flocculation sediment treatment unit, flocculating settling pond 3 comprises adjacent landwaste pond 22 and muddy water pond 23, described landwaste pond 22 side adjacent with muddy water pond 23 is provided with three connected entrances 24, in all the other embodiments, the quantity of connected entrance 24 can also be one, two or several, described landwaste pond 22 is provided with into water ramp 25 away from a side in muddy water pond 23, the bottom surface in described landwaste pond 22 is downward-sloping to the direction of connected entrance 24 along water inlet ramp 25, the bottom in described muddy water pond 23 is tapered, the feed-water end of described the first water pump 5 is communicated to 23 inside, muddy water pond.After well-drilling waste water is directed into landwaste pond 22, the silt that wherein proportion is larger precipitates in landwaste pond 22, and all the other waste water flow automatically to muddy water pond 23, can be effectively that well-drilling waste water is separated with the waste water for the treatment of subsequent disposal that passes through sediment deposition, be convenient to directly extract before pending waste water recycles and must process, and be easy to settling water conservancy diversion and be easy to follow-up desilting blowdown after the gradient is set at the bottom of pond.
All the other structures refer to embodiment 2.
Utilize the present embodiment well-drilling waste water cyclic processing device to process the method for well-drilling waste water, comprise following step:
A, by admission port 1a and dosing mouth 1b, well-drilling waste water and coagulating agent are directed in the first tank body 101, the 2 pairs of well-drilling waste waters of whipping appts and the coagulating agent that start on flocculation reaction tank 1 are uniformly mixed, the mixed solution of well-drilling waste water and coagulating agent is by middle siphunculus 7 overflow to the second tank bodies 102, and the water outlet overflow by being arranged at the second tank body 102 sides is to flocculating settling pond 3;
B, liquid in flocculating settling pond 3 interior standing 16 hours;
C, unlatching are arranged at the communicating valve between flocculation sedimentation tank and intermediate pool 4, with the second water pump 6, the liquid in intermediate pool 4 are pumped in the contraminated zone 10b of electrofloatation device 10;
D, starting impulse power supply, electrolysis also makes the sedimentation of sewage physics;
E, the liquid in the 10c of clean water area is directed in flocculation reaction tank 1, by the liquid return in the 10b of contraminated zone after in flocculating settling pond 3 static 16 hours, unlatching is arranged at the communicating valve between flocculation sedimentation tank 3 and intermediate pool 4, and the supernatant liquid of flocculation sedimentation tank 3 is imported to intermediate pool 4.And the supernatant liquid in flocculating settling pond 3 is entered to intermediate pool 4, can as required the liquid in intermediate pool 4 be back to wellbore construction afterwards.
In the present embodiment, step a calcium hydroxide add-on is 8g, and ferrous sulfate add-on is 12g, and then adds 500mg polyacrylamide to process to the sewage after processing by above-mentioned treatment step, and the sewage index after analyzing and processing is as shown in table 2.
Table 2 is parameter comparison table before and after the present embodiment sewage disposal
Embodiment 4
As shown in Figures 1 to 6, in the present embodiment well-drilling waste water flocculation sediment treatment unit, dosing mouth 1b is connected with dispensation apparatus by dosing pipe, dispensation apparatus comprises the first dispensing canister 11 and the second dispensing canister 12, the first dispensing canister 11 upper tops are provided with clear water import 11a and Imported Medicines 11b, the second dispensing canister 12 is arranged at the below of the first dispensing canister 11, in the first dispensing canister 11, be provided with mixed medicine agitator 11c, between the first dispensing canister 11 and the second dispensing canister 12, be provided with liquid transfer lime 13, the sidewall of the second dispensing canister 12 is provided with medicine liquid outlet 12a, medicine liquid outlet 12a is communicated with the dosing mouth 1b of flocculation reaction tank 1.Adopt such structure, not only guaranteed that slightly soluble or indissoluble medicine fully stir, but also can after mixing, be spilled over to the interior further slowly-releasing of the second dispensing canister 12 in the first dispensing canister 11, when having guaranteed the first dispensing canister 11 interior liquid fluidity, increased the dissolution time of coagulating agent in water body and dissolved probability.Between the dosing mouth 1b of medicine liquid outlet 12a and flocculation reaction tank 1, be provided with secondary back pipeline 14, secondary back pipeline 14 comprises the first ball valve 15a and the second ball valve 15b, and the input terminus of the input terminus of the first ball valve 15a, the second ball valve 15b is all communicated to the inside of the second dispensing canister 12; The output terminal of the first ball valve 15a is connected with the first plunger metering pump 16a, the output terminal of the first plunger metering pump 16a is parallel with delivery conduit 17 and the first return line 18a, delivery conduit 17 is communicated with the output terminal of the first plunger metering pump 16a with the dosing mouth 1b of flocculation reaction tank 1, the first return line 18a is by the internal communication of the output terminal of the first plunger metering pump 16a and the second dispensing canister 12; The output terminal of the second ball valve 15b is connected with the second plunger metering pump 16b, between the output terminal of the second plunger metering pump 16b and the second dispensing canister 12, be provided with the second return line 18b, the second return line 18b is by the output terminal of the second plunger metering pump 16b and the second dispensing canister 12 internal communication.Adopt such structure, can be as required to coagulating agent the dissolution time in water body and dissolve probability and adjust, meanwhile, the current that return line passes back in the second mixed medicinal cupping play and wash away uniform effect the water body in the second mixed medicinal cupping.
All the other structures refer to embodiment 3.
Utilize the present embodiment well-drilling waste water cyclic processing device to process the method for well-drilling waste water, comprise following step:
A, by admission port 1a and dosing mouth 1b, well-drilling waste water and coagulating agent are directed in the first tank body 101, the 2 pairs of well-drilling waste waters of whipping appts and the coagulating agent that start on flocculation reaction tank 1 are uniformly mixed, the mixed solution of well-drilling waste water and coagulating agent is by middle siphunculus 7 overflow to the second tank bodies 102, and the water outlet overflow by being arranged at the second tank body 102 sides is to flocculating settling pond 3;
B, liquid in flocculating settling pond 3 interior standing 16 hours;
C, unlatching are arranged at the communicating valve between flocculation sedimentation tank and intermediate pool 4, with the second water pump 6, the liquid in intermediate pool 4 are pumped in the contraminated zone 10b of electrofloatation device 10;
D, starting impulse power supply, electrolysis also makes the sedimentation of sewage physics;
E, the liquid in the 10c of clean water area is directed in flocculation reaction tank 1, by the liquid return in the 10b of contraminated zone in flocculating settling pond 3 static 16 hours, and the supernatant liquid in flocculating settling pond 3 is entered to intermediate pool 4, can as required the liquid in intermediate pool 4 be back to wellbore construction afterwards.
In the present embodiment, step a calcium hydroxide add-on is 8g, and ferrous sulfate add-on is 30g, and then adds 960mg polyacrylamide to process to the sewage after processing by above-mentioned treatment step, and the sewage index after analyzing and processing is as shown in table 2.
Table 3 is parameter comparison table before and after the present embodiment sewage disposal
Embodiment 5
As shown in Figures 1 to 6, in the present embodiment well-drilling waste water flocculation sediment treatment unit, in well site, be provided with skid body 19, described skid body 19 is hollow casing, described flocculation reaction tank 1, electrofloatation device 10 and dispensation apparatus are all arranged at skid body 19 inside, described skid body 19 bottoms are provided with at least two support posts 20, between described support post 20, are provided with stull 21.Adopt such structure, first determine the position that will carry out well-drilling waste water processing, then support is arranged on this position, after support has set, again skid body 19 is arranged on support, arranging like this guaranteed the stable of skid body 19 structures, guaranteed the position stability of well-drilling waste water treatment unit simultaneously, avoid the impact such as factors such as floor surface infiltrations, if transportation well-drilling waste water treatment unit, directly transport casing, guaranteed on the one hand the safety of the device in casing and stablized, make on the other hand transportation become simple.
All the other structures refer to embodiment 4.
By reference to the accompanying drawings embodiments of the invention are described in detail above; but the present invention is not limited to above-described embodiment; in the ken possessing those of ordinary skills, can also make various variations, within these variations all belong to protection scope of the present invention.
Claims (10)
1. a well-drilling waste water flocculation sediment treatment unit, comprise the flocculating settling pond (3) and the intermediate pool (4) that are provided with the flocculation reaction tank (1) of whipping appts (2) and are arranged at well site, described flocculation reaction tank (1) is provided with and is communicated to outside admission port (1a), dosing mouth (1b) and water port (1c), it is characterized in that: between described flocculating settling pond (3) and intermediate pool (4), be provided with communicating valve, between described flocculating settling pond (3) and flocculation reaction tank (1), be provided with the first water pump (5), described flocculating settling pond (3) is communicated with the feed-water end of the first water pump (5), and the water side of described the first water pump (5) is communicated with described flocculation reaction tank (1), between described intermediate pool (4) and flocculation reaction tank (1), be provided with the second water pump (6) and electrofloatation device (10), described electrofloatation device (10) comprises housing (10d), in described housing (10d), be provided with at least two pole plates (10e), described pole plate (10e) is connected with the pulse power, described pole plate (10e) is installed on housing (10d) middle part, between described pole plate (10e) bottom and housing (10d) bottom interior wall, leave spacing, formation electrolysis zone, described housing (10d) internal polar plate (10e) region, the pitch area that is positioned at below, electrolysis zone in described housing (10d) is contraminated zone (10b), the region that is positioned at top, electrolysis zone in described housing (10d) is clean water area (10c), described intermediate pool (4) is communicated with the feed-water end of the second water pump (6), the water side of described the second water pump (6) is communicated with the contraminated zone (10b) of electrofloatation device (10), the clean water area (10c) of described electrofloatation device (10) is communicated with flocculation reaction tank (1).
2. well-drilling waste water flocculation sediment treatment unit according to claim 1, it is characterized in that: described flocculation reaction tank (1) comprises the first tank body (101) and the second tank body (102), described admission port (1a) is arranged at the top of the first tank body (101), described whipping appts (2) is arranged in the first tank body (101), between described the first tank body (101) and the second tank body (102), be provided with middle siphunculus (7), one end of described middle siphunculus (7) is communicated to the inside of the first tank body (101) by the side of the first tank body (101), the other end of described middle siphunculus (7) is communicated to the inside of the second tank body (102) by the top of the second tank body (102), described water port (1c) is arranged at the side of the second tank body (102), on described the second tank body (102), be provided with secondary reaction water-in (8), described secondary reaction water-in (8) is arranged at the side of the second tank body (102), and be tangentially communicated to the inside of the second tank body (102), between described secondary reaction water-in (8) and the water outlet of water pump, be provided with secondary water inlet pipe (9).
3. well-drilling waste water flocculation sediment treatment unit according to claim 1, it is characterized in that: described flocculating settling pond (3) comprises landwaste pond (22) and muddy water pond (23) that are arranged at well site, described landwaste pond (22) side adjacent with muddy water pond (23) is provided with at least one connected entrance (24), described landwaste pond (22) is provided with into water ramp (25) away from a side of muddy water pond (23), the bottom surface in described landwaste pond (22) is downward-sloping to the direction of connected entrance (24) along water inlet ramp (25), the bottom in described muddy water pond (23) is tapered, the feed-water end of described the first water pump (5) is communicated to inside, muddy water pond (23), described water port (1c) is communicated with flocculating settling pond (3).
4. well-drilling waste water flocculation sediment treatment unit according to claim 1, is characterized in that: described pole plate (10e) is 55 °～65 ° with the angle of housing (10d) bottom surface, and the frequency of the described pulse power is 20kHz～25kHz.
5. well-drilling waste water flocculation sediment treatment unit according to claim 1, it is characterized in that: described dosing mouth (1b) is connected with dispensation apparatus by dosing pipe, described dispensation apparatus comprises the first dispensing canister (11) and the second dispensing canister (12), described the first dispensing canister (11) upper top is provided with clear water import (11a) and Imported Medicines (11b), described the second dispensing canister (12) is arranged at the below of the first dispensing canister (11), in described the first dispensing canister (11), be provided with mixed medicine agitator (11c), between described the first dispensing canister (11) and the second dispensing canister (12), be provided with liquid transfer lime (13), the sidewall of described the second dispensing canister (12) is provided with medicine liquid outlet (12a), described medicine liquid outlet (12a) is communicated with the dosing mouth (1b) of flocculation reaction tank (1).
6. well-drilling waste water flocculation sediment treatment unit according to claim 5, it is characterized in that: between described medicine liquid outlet (12a) and the dosing mouth (1b) of flocculation reaction tank (1), be provided with secondary back pipeline (14), described secondary back pipeline (14) comprises the first ball valve (15a) and the second ball valve (15b), and the input terminus of the input terminus of described the first ball valve (15a), the second ball valve (15b) is all communicated to the inside of the second dispensing canister (12); The output terminal of described the first ball valve (15a) is connected with the first plunger metering pump (16a), the output terminal of described the first plunger metering pump (16a) is parallel with delivery conduit (17) and the first return line (18a), described delivery conduit (17) is communicated with the output terminal of the first plunger metering pump (16a) with the dosing mouth (1b) of flocculation reaction tank (1), described the first return line (18a) is by the internal communication of the output terminal of described the first plunger metering pump (16a) and the second dispensing canister (12); The output terminal of described the second ball valve (15b) is connected with the second plunger metering pump (16b), between the output terminal of described the second plunger metering pump (16b) and the second dispensing canister (12), be provided with the second return line (18b), described the second return line (18b) is by the output terminal of the second plunger metering pump (16b) and the second dispensing canister (12) internal communication.
7. well-drilling waste water flocculation sediment treatment unit according to claim 1, it is characterized in that: described well site is provided with skid body (19), described skid body (19) is hollow casing, described flocculation reaction tank (1), electrofloatation device (10) and dispensation apparatus are all arranged at skid body (19) inside, described skid body (19) bottom is provided with at least two support posts (20), is provided with stull (21) between described support post (20).
8. a method of utilizing arbitrary well-drilling waste water flocculation sediment treatment unit processing well-drilling waste water in claim 1 to 7, comprises following step:
A, by admission port (1a) and dosing mouth (1b), well-drilling waste water and coagulating agent are directed in the first tank body (101), the whipping appts (2) starting on flocculation reaction tank (1) is uniformly mixed well-drilling waste water and coagulating agent, the mixed solution of well-drilling waste water and coagulating agent is by middle siphunculus (7) overflow to the second tank body (102), and the water outlet overflow by being arranged at the second tank body (102) side is in flocculating settling pond (3);
B, liquid in flocculating settling pond (3) standing 12～16 hours;
C, unlatching are arranged at the communicating valve between flocculating settling pond (3) and intermediate pool (4), with the second water pump (6), the liquid in intermediate pool (4) are pumped in the contraminated zone (10b) of electrofloatation device (10);
D, starting impulse power supply, electrolysis also makes the sedimentation of sewage physics;
E, the liquid in clean water area (10c) is directed in flocculation reaction tank (1), by the liquid return in contraminated zone (10b) after in flocculating settling pond (3) standing 12～16 hours, unlatching is arranged at the communicating valve between flocculating settling pond (3) and intermediate pool (4), and the supernatant liquid of flocculating settling pond (3) is imported to intermediate pool (4).
9. the method for processing well-drilling waste water according to claim 8, is characterized in that: after described step e, liquid in intermediate pool (4) is back to wellbore construction.
10. the method for processing well-drilling waste water according to claim 8, it is characterized in that: in described step a, described coagulating agent comprises the component of following mass ratio: 2～4 parts, 0.01～0.12 part of polyacrylamide, calcium hydroxide or 1～3 part, calcium oxide, ferric sulfate or ferrous sulfate.
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| CN111410346B (en) * | 2020-02-21 | 2022-04-22 | 西南石油大学 | Combined treatment device and method for waste drilling fluid |
| CN111252871B (en) * | 2020-02-28 | 2022-06-03 | 广东工业大学 | Device for removing colloid impurities under action of static field force coupled with multistage partition plates and water power |
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