CN112876037A - Special composite waste slurry curing agent for geological drilling and preparation and use methods thereof - Google Patents
Special composite waste slurry curing agent for geological drilling and preparation and use methods thereof Download PDFInfo
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- CN112876037A CN112876037A CN202011596630.1A CN202011596630A CN112876037A CN 112876037 A CN112876037 A CN 112876037A CN 202011596630 A CN202011596630 A CN 202011596630A CN 112876037 A CN112876037 A CN 112876037A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a special compound type waste slurry curing agent for geological drilling and a preparation method and a use method thereof, wherein the curing agent comprises the following components by mass percent, 40-60% of a cementing curing material, 15-35% of an adsorption water absorption material, 24.5% of an early strength water absorption material and 0.5% of a rapid solidification material; when the curing agent is used, the curing agent is added into the waste slurry subjected to gel breaking and dehydration treatment and is fully stirred, so that the waste slurry in the geological drilling site is converted into a solidified substance in a soil form, and the solidified substance is buried in situ after standing. The method can greatly reduce the influence of metal ions and organic matters in the waste slurry on the soil, and has simple field operation and strong applicability; the preparation method is simple, the raw materials are easy to purchase, the price is low, the use is convenient, and the large-scale production is convenient.
Description
Technical Field
The invention relates to the technical field of coal field geological drilling engineering, in particular to a special composite waste slurry curing agent for geological drilling and a preparation method and a use method thereof.
Background
In recent years, with the deep advance of ecological civilization construction, a brand-new geological exploration mode of green exploration comes into existence, mud is an important way for maintaining the stability of a hole wall, improving the drilling quality and realizing the breakthrough of finding ores in geological drilling work and is known as drilling blood, while the pollution to the ecological environment in the geological drilling work is mainly caused by waste mud, if a large amount of waste mud generated in the geological drilling work is not treated, harmful substances in the waste mud can seriously affect and pollute the surrounding soil, plants, surface water, rivers and the local ecological environment, and the treatment of the waste mud in the geological drilling work is one of the most difficult problems to treat by the exploration units in various regions at present in China.
At present, the waste slurry is mainly treated by a waste slurry curing agent curing method in the industry fields of domestic petroleum industry, shield construction, anchoring engineering, geotechnical engineering, municipal engineering and the like, the curing agents commonly used for waste slurry curing treatment in China are divided into two major categories of organic curing agents and inorganic curing agents, the organic curing agents mainly comprise polymer materials, the inorganic curing agents mainly comprise inorganic salts and gel materials, the inorganic curing agents comprise single-component curing agents and multi-component curing agents, the single-component curing agents are poor in curing effect, a plurality of multi-component curing agent products are developed domestically, and more than 10 curing agents of various types exist in the domestic market.
Disclosure of Invention
Aiming at the problems in the prior art, an inorganic salt multi-component composite waste slurry curing agent suitable for curing the waste slurry of the geological drilling in the coal field and a preparation method thereof are developed through an indoor formula screening experiment, and the curing agent is added into the waste slurry after gel breaking and dehydration treatment by mixing four components of a cementing curing material, an adsorption water-absorbing material, an early strength water-absorbing material and a quick setting material according to a certain proportion, so that the quick curing treatment of the waste slurry of the geological drilling is realized; can meet the curing treatment requirement of the waste slurry in geological drilling work of coal measure strata, and has the advantages of easily purchased raw materials, low price, convenient use, environment-friendly raw materials and good curing effect.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
the composite waste slurry curing agent special for geological drilling comprises the following components in percentage by mass: 40-60% of a cementing and curing material, 15-35% of an adsorption water-absorbing material, 24.5% of an early strength water-absorbing material and 0.5% of a quick setting material; wherein the cementing and curing material is portland cement; the water absorption material is one or two of calcium sulfate or fly ash; the early strength water absorbing material is one or two of calcium hydroxide or calcium oxide; the rapid solidification material is polyacrylamide.
Further, the special compound waste slurry curing agent for geological drilling comprises, by mass, 50% of a cementing curing material, 25% of an adsorption water-absorbing material, 24.5% of an early-strength water-absorbing material and 0.5% of a rapid solidification material.
Further, the cementing and curing material is one or two of 325# Portland cement or 425# Portland cement.
Further, the water absorbing and adsorbing material is calcium sulfate.
Further, the early strength water absorbing material is calcium hydroxide.
A preparation method of a special composite waste slurry curing agent for geological drilling comprises the following steps of selecting raw materials according to the mass percentage, and preparing and implementing the raw materials;
s1, firstly, loading an adsorption water absorption material into a horizontal coulter mixer;
s2, adding an early strength water absorbing material into the water absorbing material, fully stirring and uniformly mixing;
s3, adding a quick setting material into the mixture obtained in the step S2; fully stirring and mixing;
and S4, adding a cementing and curing material into the mixture obtained in the step S3, and fully stirring and mixing to finish the preparation.
Further, the stirring time in the step S2 is 10-15 min; the stirring time in the step S3 is 10-15 min; the stirring time in the step S4 is 20-25 min.
A use method of a special composite waste slurry curing agent for geological drilling comprises the following steps:
adding the curing agent mixture prepared in the step S4 into the waste slurry subjected to gel breaking and dehydration treatment, sufficiently stirring the mixture to convert the waste slurry in the geological drilling site into a solidified substance in a soil form, standing the solidified substance, and burying the solidified substance in the original place;
furthermore, the addition of the curing agent is 100g/L-200g/L, namely 100kg-200kg of curing agent is needed for curing 1 cubic meter of waste slurry.
Furthermore, the addition of the curing agent is 150g/L, the time for adding the curing agent mixture into the waste slurry and stirring is 10-20min, and the standing time of the cured material is 3-8 h.
Compared with the prior art, the invention has the following beneficial effects:
1. when the curing agent is used, the curing agent is added into waste slurry and then is converted into solid like soil to be buried in situ, and the method can greatly reduce the influence of metal ions and organic matters in the waste slurry on the soil, thereby reducing the influence and harm of the waste drilling mud on the environment.
2. The curing agent has the advantages of simple field operation, strong applicability and high consolidation strength, the consolidation strength of the cured product is not less than 0.3 MPa within 24 hours, and the compressive strength of the cured product reaches 1 MPa within 7 days.
3. The curing agent has the advantages of high curing and solidifying speed, high curing strength, good harmful substance fixing effect and good market popularization and application value.
4. The curing agent has the advantages of simple preparation method, easily-purchased raw materials, low price, convenient use and convenient large-scale production.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below:
the first embodiment is as follows:
a composite waste slurry curing agent special for geological drilling is composed of the following components in percentage by mass: 40% of an adsorption water absorption material, 35% of a cementing and curing material, 24.5% of an early strength water absorption material and 0.5% of a quick setting material; wherein the cementing and curing material is 325# Portland cement; the water absorption material is calcium sulfate and fly ash; the early strength water absorption material is calcium oxide; the rapid solidification material is polyacrylamide.
A preparation method of a special composite waste slurry curing agent for geological drilling comprises the following steps of selecting raw materials according to the mass percentage, and preparing and implementing the raw materials;
s1, firstly, loading an adsorption water absorption material into a horizontal coulter mixer;
s2, adding an early strength water absorbing material into the water absorbing material, fully stirring and uniformly mixing;
s3, adding a quick setting material into the mixture obtained in the step S2; fully stirring and mixing;
and S4, adding a cementing and curing material into the mixture obtained in the step S3, and fully stirring and mixing to finish the preparation.
Further, the stirring time in the step S2 is 10 min; the stirring time in the step S3 is 15 min; the stirring time in step S4 is 20 min.
A use method of a special composite waste slurry curing agent for geological drilling comprises the following steps:
adding the curing agent mixture prepared in the step S4 into the waste slurry subjected to gel breaking and dehydration treatment, sufficiently stirring the mixture to convert the waste slurry in the geological drilling site into a solidified substance in a soil form, standing the solidified substance, and burying the solidified substance in the original place;
further, the addition amount of the curing agent is 100g/L-200g/L, and the time for adding the curing agent mixture into the waste slurry and stirring is 10 min; the standing time of the cured product was 3 hours.
Example two:
a composite waste slurry curing agent special for geological drilling is composed of the following components in percentage by mass: 50% of an adsorption water-absorbing material, 25% of a cementing and curing material, 24.5% of an early strength water-absorbing material and 0.5% of a quick setting material; wherein the cementing and curing material is 425# Portland cement; the water absorption material is calcium sulfate; the early strength water absorbing material is calcium hydroxide; the rapid solidification material is polyacrylamide.
A preparation method of a special composite waste slurry curing agent for geological drilling comprises the following steps of selecting raw materials according to the mass percentage, and preparing and implementing the raw materials;
s1, firstly, loading an adsorption water absorption material into a horizontal coulter mixer;
s2, adding an early strength water absorbing material into the water absorbing material, fully stirring and uniformly mixing;
s3, adding a quick setting material into the mixture obtained in the step S2; fully stirring and mixing;
and S4, adding a cementing and curing material into the mixture obtained in the step S3, and fully stirring and mixing to finish the preparation.
Further, the stirring time in the step S2 is 15 min; the stirring time in the step S3 is 10 min; the stirring time in step S4 is 25 min.
A use method of a special composite waste slurry curing agent for geological drilling comprises the following steps:
adding the curing agent mixture prepared in the step S4 into the waste slurry subjected to gel breaking and dehydration treatment, sufficiently stirring the mixture to convert the waste slurry in the geological drilling site into a solidified substance in a soil form, standing the solidified substance, and burying the solidified substance in the original place;
further, the addition amount of the curing agent is 100g/L-200g/L, and the time for adding the curing agent mixture into the waste slurry and stirring is 15 min; the standing time of the cured product is 5 h.
Example three:
a special composite waste slurry curing agent for geological drilling is composed of the following components, by mass, 60% of a cementing curing material, 15% of an adsorption water-absorbing material, 24.5% of an early strength water-absorbing material and 0.5% of a quick setting material; wherein the cementing and curing material is 325# Portland cement; the water absorption material is calcium sulfate; the early strength water absorbing material is calcium hydroxide; the rapid solidification material is polyacrylamide.
A preparation method of a special composite waste slurry curing agent for geological drilling comprises the following steps of selecting raw materials according to the mass percentage, and preparing and implementing the raw materials;
s1, firstly, loading an adsorption water absorption material into a horizontal coulter mixer;
s2, adding an early strength water absorbing material into the water absorbing material, fully stirring and uniformly mixing;
s3, adding a quick setting material into the mixture obtained in the step S2; fully stirring and mixing;
and S4, adding a cementing and curing material into the mixture obtained in the step S3, and fully stirring and mixing to finish the preparation.
Further, the stirring time in the step S2 is 15 min; the stirring time in the step S3 is 15 min; the stirring time in step S4 is 20 min.
A use method of a special composite waste slurry curing agent for geological drilling comprises the following steps:
adding the curing agent mixture prepared in the step S4 into the waste slurry subjected to gel breaking and dehydration treatment, sufficiently stirring the mixture to convert the waste slurry in the geological drilling site into a solidified substance in a soil form, standing the solidified substance, and burying the solidified substance in the original place;
furthermore, the addition amount of the curing agent is 100g/L-200 g/L; adding the curing agent mixture into the waste slurry, and stirring for 20 min; the standing time of the cured product is 8 h.
1. Curing experiments were performed according to the components of examples one, two and three
Under the condition of room temperature, 200ml of waste flushing fluid is weighed by a measuring cup, solid-phase sludge samples are respectively contained in plastic molds after gel breaking, then 30g of prepared curing agent is respectively added, the mixture is fully stirred to form a cured product with certain strength, the formula of the curing agent is preferably designed indoors through measuring the technical indexes such as effluent volume, pH value, solidification time, compressive strength and the like, and the experimental result is shown in table 1.
TABLE 1 curative formulation screening Experimental data sheet
The experimental results are as follows: the formula in the second embodiment has the advantages of short solidification time, high effluent volume, compressive strength of 1 MPa and good solidification degree, and is suitable for being used as a preferable solidifying agent for treating waste slurry of water-based flushing fluid of plateau coal-based formations.
2. An optimal addition experiment of the curing agent is carried out indoors on the basis of the formula in the second embodiment, 200ml of waste flushing liquid is weighed by a measuring cup and is broken, then solid-phase sludge samples are respectively placed in plastic molds, then 20g, 30g and 40g of prepared curing agent mixture are respectively added and are fully stirred, the solid phase in the waste slurry is gradually solidified along with the addition of the curing agent, a small amount of liquid is separated out from the upper part, after the waste slurry is completely solidified, the upper-part seeped liquid is taken to measure the effluent volume and the pH value, the initial setting time and the complete setting time are recorded, after 7d, the compressive strength is measured by a press, the influence of different addition amounts of the curing agent on the curing effect of the waste slurry of the flushing liquid is evaluated, and the experimental results.
1# formulation: 200ml of waste flushing fluid sample and 20g of curing agent;
and 2# formula: 200ml of waste flushing fluid sample and 30g of curing agent;
and 3# formula: 200ml of waste flushing fluid sample and 40g of curing agent;
TABLE 2 Experimental data sheet for optimum addition of curing agent
Experimental result analysis shows that the curing agent developed indoors has obvious curing effect under different selected adding amount conditions, the curing degree is poor when the adding amount is small, the solidification time is long, the 2# sample has good curing effect, when the adding amount of the 3# formula sample reaches 40g, the solidification time, the effluent volume and the 2# formula are not changed greatly, but the compressive strength is higher than that of the 2# formula, so that the optimal adding amount of the selected curing agent is 150g/L, namely 150kg of the curing agent is needed by waste slurry after 1 cubic gel breaking is cured.
3. Contamination testing
If the solid after the curing agent is added into the waste slurry of the washing fluid can not effectively absorb or lock harmful components in the solid-phase sludge into the solid, when the solid is washed and soaked by water, the harmful substances can enter the surrounding water body or soil, so that the environment is polluted, and the pollution index of the solid after the waste slurry is cured can meet the sewage discharge requirement.
According to the invasion toxicity test method in the harmful characteristic test and detection analysis method (trial) of industrial solid waste issued by the national environmental protection agency, an invasion liquid is prepared indoors through an invasion test and is used for evaluating the invasion toxicity of the condensate. According to the formula in the second embodiment, the addition of the curing agent is 150g/L, and the washing liquid waste slurry is cured indoors; taking a cured substance formed in an indoor curing experiment, putting the cured substance into a beaker after crushing, adding 500ml of distilled water for soaking for a week, then sampling the immersed liquid, and entrusting a laboratory of geological and environmental geological survey institute of the Qinghai province hydrogeological engineering to detect pollution indexes, wherein the measurement result is shown in table 3.
Table 3 table for testing condensate intrusion liquid
And (3) testing results: as can be seen from Table 3, the main pollution indexes of oil content, sulfur content, COD, chromium, suspended matter content and the like of the liquid leached by the cured material after curing all reach the comprehensive sewage discharge standard, and the Cl content is only 1179mg/L, which shows that the salt concentration which can be precipitated from the cured material is lower, the salinization of the soil cannot be caused, the performance of the soil cannot be changed, and the soil is not influenced, so that the property of the leached liquid in the cured material can meet the field landfill requirement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by equivalent replacement or change according to the technical solution and the modified concept of the present invention within the technical scope of the present invention.
Claims (10)
1. The special composite waste slurry curing agent for geological drilling is characterized by comprising the following components in parts by weight: the curing agent comprises the following components in percentage by mass: 40-60% of a cementing and curing material, 15-35% of an adsorption water-absorbing material, 24.5% of an early strength water-absorbing material and 0.5% of a quick setting material; wherein the cementing and curing material is portland cement; the water absorption material is one or two of calcium sulfate or fly ash; the early strength water absorbing material is one or two of calcium hydroxide or calcium oxide; the rapid solidification material is polyacrylamide.
2. The composite waste slurry curing agent special for geological drilling as claimed in claim 1, wherein the curing agent comprises: the water-absorbing material consists of 50% of a cementing and curing material, 25% of an absorbing and water-absorbing material, 24.5% of an early-strength water-absorbing material and 0.5% of a quick-setting material in percentage by mass.
3. The composite waste slurry curing agent special for geological drilling as claimed in claim 1, wherein the curing agent comprises: the portland cement is one or two of 325# portland cement and 425# portland cement.
4. The composite waste slurry curing agent special for geological drilling as claimed in claim 1, wherein the curing agent comprises: the water absorbing material is calcium sulfate.
5. The composite waste slurry curing agent special for geological drilling as claimed in claim 1, wherein the curing agent comprises: the early strength water absorbing material is calcium hydroxide.
6. The preparation method of the special compound type waste slurry curing agent for geological drilling according to any one of claims 1-5, characterized by comprising the following steps: selecting raw materials according to the technical scheme in the claims, and preparing and implementing the raw materials according to the following steps;
s1, firstly, loading an adsorption water absorption material into a horizontal coulter mixer;
s2, adding an early strength water absorbing material into the water absorbing material, fully stirring and uniformly mixing;
s3, adding a rapid solidification material into the mixture obtained in the step S2; fully stirring and mixing;
and S4, adding a cementing and curing material into the mixture obtained in the step S3, and fully stirring and mixing to finish the preparation of the curing agent.
7. The method for preparing the composite waste slurry solidifying agent specially used for geological drilling according to claim 5, wherein the stirring time in the step S2 is 10-15 min; the stirring time in the step S3 is 10-15 min; the stirring time in the step S4 is 20-25 min.
8. The use method of the special compound type waste slurry curing agent for geological drilling according to any one of claims 2-5, characterized in that: adding the curing agent into the waste slurry subjected to gel breaking and dehydration treatment, fully stirring the mixture to convert the waste slurry into a solidified substance in a soil form on the geological drilling site, standing the solidified substance, and burying the solidified substance in the original place.
9. The use method of the special compound type waste slurry curing agent for geological drilling according to claim 8, characterized in that: the addition amount of the curing agent is 100g/L-200 g/L.
10. The use method of the special compound type waste slurry curing agent for geological drilling according to claim 8, characterized in that: the addition amount of the curing agent is 150 g/L; adding the curing agent mixture into the waste slurry, and stirring for 10-20 min; the standing time of the condensate is 3-8 h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115072950A (en) * | 2022-06-28 | 2022-09-20 | 重庆交通大学 | Mud consolidation agent capable of consolidating mud into soft consolidated body in situ and mud in-situ treatment method |
| CN115196711A (en) * | 2022-06-24 | 2022-10-18 | 成都理工大学 | Method for circularly treating waste liquid of rock core drilling mud |
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| CN108083590A (en) * | 2017-12-21 | 2018-05-29 | 天津大学 | Composite curing agent and three sulphur system drilling discarded slurry of gas field cure optimization method |
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| CN1342505A (en) * | 2000-09-08 | 2002-04-03 | 石油大学(北京) | Solidification process for treating waste water-base drilling liquid and its solidifying agent |
| CN103524017A (en) * | 2013-10-23 | 2014-01-22 | 中国海洋石油总公司 | Compound gel breaker for processing abandoned drilling mud at sea |
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| CN115196711A (en) * | 2022-06-24 | 2022-10-18 | 成都理工大学 | Method for circularly treating waste liquid of rock core drilling mud |
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