CN115196711A - Method for circularly treating waste liquid of rock core drilling mud - Google Patents

Method for circularly treating waste liquid of rock core drilling mud Download PDF

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Publication number
CN115196711A
CN115196711A CN202210721852.4A CN202210721852A CN115196711A CN 115196711 A CN115196711 A CN 115196711A CN 202210721852 A CN202210721852 A CN 202210721852A CN 115196711 A CN115196711 A CN 115196711A
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waste liquid
core drilling
agent
following
drilling mud
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CN115196711B (en
Inventor
杨彪
苏攀云
刘志龙
王江陵
祁伟
樊松浩
李成元
吕汉秦
王文杰
侯秀宏
石岩
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Hohhot Natural Resources Comprehensive Survey Center Of China Geological Survey
Chengdu Univeristy of Technology
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Hohhot Natural Resources Comprehensive Survey Center Of China Geological Survey
Chengdu Univeristy of Technology
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/008—Sludge treatment by fixation or solidification
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065—Separating solids from drilling fluids
    • E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to a method for circularly treating waste liquid of rock core drilling mud, which innovatively treats the waste liquid of the rock core drilling mud step by using a pretreatment agent and a post-treatment agent, wherein nonionic polyacrylamide and modified activated carbon particles in the pretreatment agent act synergistically to wrap, adsorb and flocculate oily residues, heavy metal particles and macromolecular chemical substances in the waste liquid of the rock core drilling mud, so as to finally form an upper clear liquid layer and a lower turbid liquid layer, the upper clear liquid layer is pumped back to the rock core drilling construction for cyclic utilization, the lower turbid liquid layer is pumped into a standing and curing tank, and the turbid liquid layer is cured by using the synergistic action of an amidoamine sludge curing agent in the post-treatment agent and an alkalized wormwood grass plant, so that the turbid liquid layer forms solid waste with the volume of 5-8% of the volume of the original mud waste liquid.

Description

Method for circularly treating waste liquid of rock core drilling mud
Technical Field
The invention belongs to the field of geological drilling engineering, relates to a drilling mud waste liquid treatment technology, and particularly relates to a core drilling mud waste liquid circulation treatment method.
Background
The core drilling mud plays important roles of cooling a drill bit, maintaining a hole wall, carrying rock debris, balancing formation pressure and the like in drilling engineering. Because of the above-mentioned functions, core drilling mud is generally added with: bentonite, fluid loss additive, carboxymethyl cellulose, vegetable gum, potassium humate, sulfonated asphalt, high-viscosity plugging agent, caustic soda and other chemical products. In order to maintain the performance of the core drilling mud, the mud needs to be continuously added and replaced, and a large amount of mud waste liquid is generated in the process, wherein the waste liquid contains fine-grain silt, oily residues, heavy metal particles, macromolecular chemical substances (such as plant gum molecules, sulfonated asphalt molecules and the like) contained in the original drilling mud, macromolecular polymers wrapping colloids such as the silt, the oily particles, the heavy metal particles and the like, and the like. These waste residues are mixed with the slurry and waste liquid, and cannot be properly disposed of and used, and improper disposal (such as random discharge) causes great environmental pollution.
Rock core drilling construction positions are generally located in mountainous regions and hilly regions, a large amount of slurry waste liquid cannot be properly treated, a large amount of manpower, material resources and financial resources are generally consumed for transferring treatment in the prior art, and the method is not economical and environment-friendly enough, so that the slurry waste liquid cannot be efficiently and properly treated for a long time. Therefore, the method for treating the slurry waste liquid is low in price and simple to implement, and has great transformation, popularization and application values in the industry.
Disclosure of Invention
The invention aims to overcome the inconvenience of the prior art, and provides a method for circularly treating rock core drilling slurry waste liquid, which can be efficiently and practically applied to the field of solid mineral exploration, wherein the method is mainly used for adsorbing and flocculating oily residues in the slurry waste liquid, precipitating and flocculating heavy metal particles and macromolecular chemical substances in the slurry waste liquid, finally forming an upper layer of clear liquid and a lower layer of turbid liquid, pumping the upper layer of clear liquid back to a rock core drilling construction for cyclic utilization, pumping the lower layer of turbid liquid into a standing and solidifying pool, solidifying the supernatant of clear liquid into massive solid waste after being treated by a curing agent, and further facilitating treatment, and being economic and environment-friendly.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a method for circularly treating waste liquid of core drilling mud comprises the following steps:
preparing a precipitation treatment tank and a standing curing tank at the periphery of a construction site, and wrapping the bottom and the periphery with waterproof materials;
injecting the core drilling waste liquid slurry into a sedimentation treatment tank, testing the A-Ph value of the slurry waste liquid to be treated, adding a pretreatment agent according to the range of the A-Ph value, fully mixing and stirring, and standing for 12-24 hours; under the condition that the Ph value is between 8.0 and 8.5 or less than 8.0, 20 to 25L of aqueous solution of a pretreatment agent is required to be added for treating each cubic volume of slurry waste liquid; under the condition that the A-Ph value is between 8.5 and 9.0 or more than 9.0, 15 to 20L of aqueous solution of a pretreatment agent is required to be put into each cubic of slurry waste liquid;
thirdly, after a pretreatment agent is added into the sedimentation treatment tank, standing and layering are carried out to form an upper layer of clear liquid and a lower layer of turbid liquid, the upper layer of clear liquid is pumped back to the core drilling construction for recycling, and the lower part of turbid liquid is pumped into the standing and solidifying tank;
after the pretreatment is finished, when the slurry waste liquid enters a standing and curing pool, 5-10 parts by weight of post-treatment agent is sprayed on the slurry waste liquid per cubic meter for treatment, after the slurry waste liquid is fully mixed and stirred, standing is carried out for 3-5d, a blocky solidified layer is finally formed, the volume of the blocky solidified layer is 5% -8% of the volume of the original slurry waste liquid, and then the solid waste of the solidified layer can be recycled.
The pretreatment agent comprises the following components in parts by weight:
8-10 parts of nonionic polyacrylamide;
2-3 parts of calcium oxide;
4-5 parts of modified activated carbon particles,
the preparation method of the pretreatment agent comprises the following steps: adding the components of the pretreatment agent into a grinding machine for grinding, and then sieving by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the aqueous solution of the pretreatment agent is prepared: adding 10kg of the pretreatment agent solid mixture into per cubic meter of pure water, and fully stirring to obtain the pretreatment agent aqueous solution.
The preparation method of the modified activated carbon particles comprises the following steps:
making powdered activated carbon particles in H 2 O 2 Soaking the solution for 10-12h, uniformly stirring every 2h, and then extracting and filtering to obtain treated peroxide activated carbon particles;
secondly, soaking the activated carbon particles after the peroxidation treatment in 60-80wt% NaOH strong base solution for 10-12h, uniformly stirring at intervals of 2h, then extracting and filtering to obtain the treated modified activated carbon particles, wherein the specific surface area of the modified activated carbon particles is 1625.33-1695.16m 2 The porosity is 55-57% compared with the ordinary active carbon (the specific area is 1200-1400 m) 2 A/g, porosity of 45-50%) is significantly improved.
The post-treatment agent comprises an amidoamine sludge curing agent and an alkalized wormwood grass plant, wherein the sludge curing agent and the wormwood grass plant are mixed according to a ratio of 1.
The amido amine sludge curing agent comprises the following components in parts by weight:
20-25 parts of ethylenediamine disuccinic acid;
25-30 parts of a polycarboxylic acid water reducing agent;
15-20 parts of liquid epoxy resin,
specifically, the preparation method of the amidoamine sludge curing agent comprises the following steps:
(1) Weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducing agent and liquid epoxy resin;
(2) Uniformly mixing ethylenediamine disuccinic acid and liquid epoxy resin, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(3) Adding a polycarboxylic acid water reducing agent, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(4) And (4) cooling the mixture obtained in the step (3) to the temperature of the mixture which is less than or equal to 40 ℃, uniformly stirring, and discharging to obtain the acylamino amine sludge curing agent.
The herba Artemisiae Annuae plant is preferably herba Artemisiae Annuae, and the alkalization treatment method comprises: pulverizing Artemisia capillaris into 1-2mm straw, soaking in 10-20wt% NaOH solution for 10-12 hr, stirring uniformly every 2 hr, and standing for 8-10 hr to obtain processed Artemisia capillaris.
In the process of solidification of the wormwood grass plants, the method has the following functions: the functions of bridging, accelerating curing and enhancing the stability of the block after curing; meanwhile, the wormwood plants and the curing agent are matched for use, so that the using amount of the curing agent can be properly reduced, the chemical reagent and the plant effect are matched together to play a synergistic effect, the accelerated curing is realized to a certain extent, the curing treatment is reduced, and the positive environment-friendly effect is achieved.
The invention has the advantages and positive effects that:
1. in the pretreatment agent in the method, cheap nonionic polyacrylamide and modified activated carbon are used for synergistically acting on the slurry waste liquid to flocculate the wastes such as silt, heavy metal particulate matter residues and the like in the slurry waste liquid, and other macromolecular chemical substances are wrapped and flocculated, so that the adsorption effect on heavy metal large-particle substances and oily residue wastes is improved by the modified activated carbon; meanwhile, calcium oxide releases heat when meeting water to accelerate the processing reaction, and calcium hydroxide generated after meeting water can neutralize a small amount of free acid and acidic salt substances in the slurry waste liquid and form water-insoluble precipitates in metal ions in the waste liquid to further separate the slurry waste liquid and accelerate the separation and adsorption flocculation of the slurry waste liquid.
2. The post-treatment agent in the method has the main action mechanism that an ion exchange adsorption mechanism is established by the amidoamine sludge curing agent, so that turbid liquid achieves the effects of rapid dehydration and consolidation, meanwhile, artemisia grass plants subjected to alkali treatment are added, and the artemisia grass micro-straws play a role in bridging the solidification of residue substances, thereby further accelerating the solidification reaction of the turbid liquid.
3. The invention has scientific and reasonable design, innovatively uses a pretreatment agent and a post-treatment agent to carry out step-by-step treatment on the core drilling mud waste liquid, the nonionic polyacrylamide and the modified powder synthetic material active carbon particles in the pretreatment agent are synergistic to carry out precipitation and flocculation on oily residues, heavy metal particles and macromolecular chemical substances in the mud waste liquid, finally forms an upper clear liquid and a lower turbid liquid, extracts the upper clear liquid back to the core drilling construction for cyclic utilization, pumps the lower turbid liquid into a standing and curing pool, and carries out curing treatment on the turbid liquid through the synergistic action of an amidoamine sludge curing agent in the post-treatment agent and an alkalized wormwood herb plant, so that the turbid liquid is accelerated to form solid waste, the volume of the solid waste is 5-8% of the volume of the raw mud waste liquid, the recovery treatment is convenient, the recovery rate of the waste liquid is improved, and the pollution of the mud waste liquid to the environment is greatly reduced.
Drawings
FIG. 1 is a schematic view of the structure of a sedimentation treatment tank and a standing solidification tank in the present invention;
FIG. 2 is a schematic diagram showing the effect of the two-stage treatment tank of FIG. 1 after the pretreatment agent and the post-treatment agent are added;
FIG. 3 is a diagram illustrating the effect of the treatment method of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The method is used for testing the gold mine resource exploration base in the inner Mongolia Bauhua mountain area, the main working method is geological core drilling, and drilling mud is an essential fluid material in the drilling process. However, in this process, the slurry forms an intractable waste liquid after use.
The invention provides a method for circularly treating core drilling mud waste liquid, which comprises the following steps:
firstly, preparing a sedimentation treatment tank and a standing curing tank on the periphery of a construction site, and wrapping the bottom and the periphery of the sedimentation treatment tank and the standing curing tank by using waterproof materials as shown in figure 1;
injecting the core drilling waste liquid slurry into a sedimentation treatment tank, testing the A-Ph value of the slurry waste liquid to be treated, adding a pretreatment agent according to the range of the A-Ph value, fully mixing and stirring, and standing for 12-24 hours; under the condition that the Ph value is between 8.0 and 8.5 or less than 8.0, 20 to 25L of pretreatment agent aqueous solution is required to be added for treating each cubic of slurry waste liquid; under the condition that the A-Ph value is between 8.5 and 9.0 or more than 9.0, 15 to 20L of aqueous solution of a pretreatment agent is required to be put into each cubic of slurry waste liquid;
thirdly, after a pretreatment agent is added into the sedimentation treatment tank, standing and layering are carried out to form an upper layer of clear liquid and a lower layer of turbid liquid, the upper layer of clear liquid is pumped back to the core drilling construction for recycling, and the lower part of turbid liquid is pumped into the standing and solidifying tank;
after the pretreatment is finished, when the slurry waste liquid enters a standing solidification pool, 5-10 parts by mass of post-treatment agent are sprayed on the slurry waste liquid per cubic meter for treatment, the slurry waste liquid is fully mixed and stirred, and then is kept standing for 1-2d to finally form a blocky solidified layer which is 5% -8% of the volume of the original slurry waste liquid, then the solid waste of the solidified layer can be recycled, and the effect schematic diagram after the pre-treatment agent and the post-treatment agent are added into the two-stage treatment pool is shown in fig. 2.
The invention discloses a pretreatment agent and a post-treatment agent for treating drilling mud waste liquid respectively, wherein the pretreatment agent comprises the following components in parts by weight: 8-10 parts of nonionic polyacrylamide; 2-3 parts of calcium oxide; 4-5 parts of modified powder synthetic material active carbon particles, wherein the preparation method of the pretreatment agent comprises the following steps: adding the components of the pretreatment agent into a grinding machine for grinding, and then sieving by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the aqueous solution of the pretreatment agent is prepared: adding 10kg of the pretreatment agent solid mixture into per cubic meter of pure water, and fully stirring to obtain a pretreatment agent aqueous solution.
The invention modifies common active carbon powder, and the specific modification preparation method is as follows:
making powdered activated carbon particles in H 2 O 2 Soaking the solution for 10-12h, uniformly stirring every 2h, and then extracting and filtering to obtain treated peroxide activated carbon particles;
soaking the activated carbon particles after peroxidation treatment in 60-80wt% NaOH strong base solution for 10-12h, uniformly stirring at intervals of 2h, then extracting and filtering to obtain treated modified activated carbon particles, wherein the specific surface area of the treated modified activated carbon particles is 1625.33-1695.16m 2 The porosity is 55-57% compared with the common active carbon (the specific area is1200-1400m 2 A/g, porosity of 45-50%) is significantly improved.
The post-treatment agent comprises an amidoamine sludge curing agent and the tarragon grass plants after alkalization treatment, wherein the sludge curing agent and the tarragon grass plants are mixed and prepared according to the weight ratio of 1. The amido amine sludge curing agent comprises the following components in parts by weight: 20-25 parts of ethylenediamine disuccinic acid; 25-30 parts of a polycarboxylic acid water reducing agent; 15-20 parts of liquid epoxy resin, in particular to a preparation method of the amidoamine sludge curing agent, which comprises the following steps:
(1) Weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducing agent and liquid epoxy resin;
(2) Uniformly mixing ethylenediamine disuccinic acid and liquid epoxy resin, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(3) Adding a polycarboxylic acid water reducing agent, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(4) And (4) cooling the mixture obtained in the step (3) to the temperature of the mixture which is less than or equal to 40 ℃, uniformly stirring, and then discharging to obtain the amidoamine sludge curing agent.
The plant of Artemisia grass is preferably Artemisia annua, and the alkalization treatment method comprises: pulverizing Artemisia vulgaris into 1-2mm stalk, soaking in 10-20wt% NaOH solution for 10-12 hr, stirring uniformly at 2 hr intervals, and standing for 8-10 hr to obtain processed Artemisia vulgaris.
In the process of solidification of the wormwood grass plants, the method has the following functions: "bridging" action, accelerated curing action and post-cure block stability enhancement action; meanwhile, the wormwood plants and the curing agent are matched for use, so that the using amount of the curing agent can be properly reduced, the chemical reagent and the plant effect are matched together to play a synergistic effect, the accelerated curing is realized to a certain extent, the curing treatment is reduced, and the positive environment-friendly effect is achieved. In addition, the wormwood plants widely develop in the inner Mongolia region, and pollen of the wormwood plants causes anaphylactic reaction of people in most regions.
The invention compares the untreated waste liquid with the treated waste liquid, the specific comparison result is shown in figure 3, and index determination is carried out at the same time, and the specific determination comparison result is shown in the following table:
Figure BDA0003711668290000051
in conclusion, the amount of sludge, suspended matters and oil in clear liquid treated by the method disclosed by the invention are greatly reduced, the light transmittance is increased, and the method is in accordance with the recycling of drilling mud; the sludge amount, suspended matters, oils, metal ions, chemical oxygen demand and the like of the treated turbid liquid are increased in different degrees, and the light transmittance is reduced.
Fig. 3 also shows that the untreated slurry waste liquid in the core drilling process in the method of the present application is treated by the above steps of the present application, an obvious separation effect of "clear liquid" and "turbid liquid" is achieved, wherein the "clear liquid" can be recycled, the "turbid liquid" forms solid waste after standing and curing treatment, the volume of the solid waste is 5% -8% of the volume of the original slurry waste liquid, and then the solid waste of the "cured layer" can be recovered, so that the recovery is convenient, and the pollution of the slurry waste liquid to the environment is greatly reduced.
Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, alterations and modifications are possible without departing from the spirit and scope of this disclosure and appended claims, and accordingly, the scope of this disclosure is not limited to the embodiments disclosed.

Claims (7)

1. A method for circularly treating core drilling mud waste liquid is characterized by comprising the following steps: the method comprises the following steps:
preparing a precipitation treatment tank and a standing curing tank at the periphery of a construction site, and wrapping the bottom and the periphery with waterproof materials;
injecting the core drilling slurry waste liquid into a sedimentation treatment tank, testing the A-Ph value of the slurry waste liquid to be treated, adding a pretreatment agent according to the range of the A-Ph value, fully mixing and stirring, and standing for 12-24 hours;
thirdly, after the slurry waste liquid in the precipitation treatment tank is added with the pretreatment agent, standing and layering are carried out to form an upper layer of clear liquid and a lower layer of turbid liquid, the upper layer of clear liquid is pumped back to the core drilling construction for recycling, and the lower part of turbid liquid is pumped into the standing and solidifying tank;
after the pretreatment is finished, when the slurry waste liquid enters a standing solidification pool, 5-10 parts by mass of post-treatment agent are sprayed on the slurry waste liquid per cubic meter for treatment, after the slurry waste liquid is fully mixed and stirred, the mixture is kept standing for 3-5d to finally form a blocky solidified layer which is 5% -8% of the volume of the original slurry waste liquid, and then the solid waste of the solidified layer can be recycled,
the pretreatment agent comprises the following components in parts by weight:
8-10 parts of nonionic polyacrylamide;
2-3 parts of calcium oxide;
4-5 parts of modified activated carbon particles,
the post-treatment agent comprises an amidoamine sludge curing agent and an alkalized wormwood grass plant, the sludge curing agent and the wormwood grass plant are mixed according to the proportion of 1,
the amidoamine sludge curing agent comprises the following components in parts by weight:
20-25 parts of ethylenediamine disuccinic acid;
25-30 parts of a polycarboxylic acid water reducing agent;
15-20 parts of liquid epoxy resin.
2. The method for recycling the waste liquid of the core drilling mud as claimed in claim 1, wherein the method comprises the following steps: under the condition that the Ph value is between 8.0 and 8.5 or less than 8.0, 20 to 25L of aqueous solution of a pretreatment agent is required to be added for treating each cubic of slurry waste liquid, and under the condition that the A-Ph value is between 8.5 and 9.0 or more than 9.0, 15 to 20L of aqueous solution of the pretreatment agent is required to be added for treating each cubic of slurry waste liquid.
3. The method for circularly treating core drilling mud waste liquid according to claim 1, characterized by comprising the following steps: the preparation method of the pretreatment agent comprises the following steps: adding the components of the pretreatment agent into a grinding machine for grinding, and then sieving by a 100-mesh sieve to obtain a pretreatment agent solid mixture; when in use, the aqueous solution of the pretreatment agent is prepared: adding 10kg of the pretreatment agent solid mixture into per cubic meter of pure water, and fully stirring to obtain the pretreatment agent aqueous solution.
4. The method for recycling the waste liquid of the core drilling mud as claimed in claim 1, wherein the method comprises the following steps: the preparation method of the modified activated carbon particles comprises the following steps:
making powdered activated carbon particles in H 2 O 2 Soaking the solution for 10-12h, uniformly stirring every 2h, and then extracting and filtering to obtain treated peroxide activated carbon particles;
soaking the activated carbon particles after peroxidation treatment in 60-80wt% NaOH strong base solution for 10-12h, uniformly stirring at intervals of 2h, then extracting and filtering to obtain treated modified activated carbon particles, wherein the specific surface area of the treated modified activated carbon particles is 1625.33-1695.16m 2 (iii) a porosity of 55-57%.
5. The method for recycling the waste liquid of the core drilling mud as claimed in claim 1, wherein the method comprises the following steps: the preparation method of the amide amine sludge curing agent comprises the following steps:
(1) Weighing ethylenediamine disuccinic acid, a polycarboxylic acid water reducing agent and liquid epoxy resin;
(2) Uniformly mixing ethylenediamine disuccinic acid and liquid epoxy resin, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(3) Adding a polycarboxylic acid water reducing agent, heating to 150-170 ℃, and stirring for reacting for 2-4h;
(4) And (4) cooling the mixture obtained in the step (3) to the temperature of the mixture which is less than or equal to 40 ℃, uniformly stirring, and discharging to obtain the acylamino amine sludge curing agent.
6. The method for recycling the waste liquid of the core drilling mud as claimed in claim 1, wherein the method comprises the following steps: the method for alkalizing the wormwood grass plants comprises the following steps: pulverizing Artemisia capillaris into 1-2mm straw, soaking in 10-20wt% NaOH solution for 10-12 hr, stirring uniformly every 2 hr, and standing for 8-10 hr to obtain processed Artemisia capillaris.
7. The method for recycling the waste liquid of the core drilling mud as claimed in claim 1 or 6, wherein the method comprises the following steps: the Artemisia grass plant is preferably Artemisia annua.
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