CN110080723A - Application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust - Google Patents
Application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust Download PDFInfo
- Publication number
- CN110080723A CN110080723A CN201910357216.6A CN201910357216A CN110080723A CN 110080723 A CN110080723 A CN 110080723A CN 201910357216 A CN201910357216 A CN 201910357216A CN 110080723 A CN110080723 A CN 110080723A
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- Prior art keywords
- coal
- pit shaft
- coal dust
- bed gas
- processing
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Classifications
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- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
Abstract
The present invention relates to a kind of application of anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust.By the way that PAM flocculant to be introduced into the processing of pulverized coal particle in the present invention, so that the coal dust of coal seam output can flocculate in shaft bottom, by the well-flushing in later period, flocculated coal dust is drained into ground.Due to the addition of PAM flocculant in the present invention, coal dust meeting rapid subsidence, this will alleviate the problem of coal bed gas pit shaft blocks significantly, and effectively improve production efficiency, reduce maintenance pit shaft expense, reduce gas production cost.
Description
Technical field
The present invention relates to chemical technology fields more particularly to anionic PAM flocculant in coal bed gas pit shaft suspension coal dust
Application in processing.
Background technique
China Coal Bed Methane Resource is abundant, and 2000 meters of buried depth reach 36.81 tcms with shallow Coal bed gas project.Hair
Exhibition coal gas industry can not only mitigate petroleum supply pressure, supplement the deficiency of the long-range stock number of conventional gas, but also will have
Effect improves coal mine production safety condition, and environment protection has great national energy meaning.In recent years, domestic constituent parts
The investment of coal gas industry is increased, country also gives support on policy, but coal bed gas well gas production is far below expection, wherein coal
One of the main reason for layer and pit shaft blocking are influence coal bed gas well gas production.
In fact, coal bed gas well is in process of production, coal seam and pit shaft are easy to the blocking for occurring different degrees of, and block
It will lead to coal seam permeability reduction, Liquid output decline, pressure drop range shorter, bottom pressure is lost, to influence coal bed gas well
Production effect and gas production；More seriously, the pulverized coal particle to suspend in coal bed gas well pit shaft can be made after entering mining tubing string
At frequent holddown, greatly influence production efficiency.
Currently, a good processing method solves the above problems not yet.
Summary of the invention
In view of the above-mentioned problems, now providing a kind of anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust
Using, it is intended to utilize suspension in pit shaft in PAM flocculant (molecular weight is 12,000,000-2,200 ten thousand) control coal bed gas well recovery process
Pulverized coal particle concentration avoids it from entering inside tubing string the accident for causing holddown, to reduce powder outlet quantity in pit shaft, improves gas production effect
Gas production cost is reduced while rate.
PAM flocculant, chemical name are polyacrylamides, are water soluble polymer, insoluble in most of organic
Solvent has good flocculability, can reduce the frictional resistance between liquid, can be divided into nonionic, yin by ion characteristic point
Four seed type of ion, cation and amphoteric.
Flocculation of the polyacrylamide flocculant in coal dust processing is two features due to it: long-chain (line) shape
Molecular structure and its a large amount of active group contained, polyacrylamide is straight chain polymer, because each molecule is by 100,000
Above monomer polymerization is constituted, and strand is considerably long, if it is stretched completely, length is than general molecule (such as sucrose)
Or ion (such as Ca2+) tens of thousands of times long or more.Since its molecule is long and thin, it can be bent or be curled into irregular curve shape,
This long chain stretches out many chemical active radicals outward, and such as amide groups and carboxyl, amide groups is nonionic group, but
Also it is good at forming secondary valence key and adsorbing and link up with the active group of other materials.Since polyacrylamide amine molecule is long and thin
And there are many chemical active radicals, they can generate many connections with depositing particles and form biggish flocculate, these flocculations
The structure of object is such as cotton-wool, loose, amorphous, interlinks but not bery firm, and there are many spaces and many fine in inside
Network, contain big quantity of fluid, thus the specific gravity of flocculate is quite close to the liquid itself present in it.Network is gone back in flocculate
Various particles, this just by various heterogeneities, heterogeneity, different size of Collections of microparticles together.Therefore, gather
Acrylamide flocculating agent can remove the complete network of particle original in solution, and solution is made to seem especially clear and transparent and have light
Pool, and since the size of flocculate is larger, its sedimentation and filtering is all than very fast.
In polyacrylamide flocculant and waste water the flocculation of colloid be by chemisorption and physical network both
What form generated.According to above-mentioned mechanism it is found that molecular weight is higher, the longer polyacrylamide of molecule, more particle can be adsorbed,
The ability for forming network is stronger, therefore flocculation performance is preferable.
Similarly, the ratio of carboxyl is suitably also critically important in polyacrylamide amine molecule, because the colloid majority in waste water is negatively charged,
Polyacrylamide needs suitable carboxyl and is built bridge and its effect by calcium ion.But if carboxyl-content is too many, polyacrylamide
Amine molecule negative electricity itself is too strong, and the mutual expelling force between molecule itself is excessive, is also unfavorable for flocculation.Polyacrylamide flocculant
For improving in water treatment procedure the efficiency for the techniques such as settling, clarify, filter, be centrifuged.
By the way that PAM flocculant to be introduced into the processing of pulverized coal particle in the present invention, so that the coal dust of coal seam output can flocculate
In shaft bottom, by the well-flushing in later period, flocculated coal dust is drained into ground.Due to the addition of PAM flocculant, coal dust meeting in the present invention
The problem of rapid subsidence, this will alleviate the blocking of coal bed gas pit shaft significantly, and production efficiency is effectively improved, it reduces maintenance pit shaft and takes
With reduction gas production cost.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without creative labor,
It shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention is further explained in the light of specific embodiments, but not as the limitation of the invention.
Embodiment 1
Sewage containing coal is added into beaker, and (coal, water quality ratio are 1:1, to simulate underground coal dust situation, wherein Pulverized Coal
200 mesh of diameter), then thereto be added commercial anionic PAM flocculant (be purchased from Gongyi three and environmental protection, molecular weight 1,200 ten thousand), flocculate 1
Minute, there is the blocky flocculate that diameter is about 1cm or so in beaker, and liquid is in thick.
Embodiment 2
Sewage containing coal is added into beaker, and (coal, water quality ratio are 1:1, to simulate underground coal dust situation, wherein Pulverized Coal
200 mesh of diameter), then thereto be added commercial anionic PAM flocculant (be purchased from Gongyi three and environmental protection, molecular weight 1,600 ten thousand), flocculate 3
Minute, there is the blocky flocculate that diameter is about 3cm or so in beaker, and liquid is in thick.
Embodiment 3
Sewage containing coal is added into beaker, and (coal, water quality ratio are 1:1, to simulate underground coal dust situation, wherein Pulverized Coal
200 mesh of diameter), then thereto be added commercial anionic PAM flocculant (be purchased from Gongyi three and environmental protection, molecular weight 2,200 ten thousand), flocculate 3
Minute, there is the blocky flocculate that diameter is about 5cm or so in beaker, and liquid is in thick.
By the above description of test, anionic PAM flocculant can effectively flocculate coal dust, and flocculating agent molecule amount is bigger can be with
Flocculated coal dust is more, and it is also bigger to be formed by flocculation agglomerate.
The mass ratio of flocculant and coal dust in sewage containing coal is 1:50 in the embodiment of the present invention, it should be noted that on
Stating mass ratio can take the circumstances into consideration to add according to practical flocculation situation.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that and all replace with being equal made by present specification
It changes and obviously changes obtained scheme, should all be included within the scope of the present invention.
Claims (1)
1. application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust, which is characterized in that the PAM wadding
The molecular weight of solidifying agent is 12,000,000-2,200 ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910357216.6A CN110080723A (en) | 2019-04-30 | 2019-04-30 | Application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910357216.6A CN110080723A (en) | 2019-04-30 | 2019-04-30 | Application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust |
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| Publication Number | Publication Date |
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| CN110080723A true CN110080723A (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910357216.6A Pending CN110080723A (en) | 2019-04-30 | 2019-04-30 | Application of the anionic PAM flocculant in the processing of coal bed gas pit shaft suspension coal dust |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485966A (en) * | 2019-08-11 | 2019-11-22 | 太原理工大学 | A method of it solving coal dust and blocks coal seam fracture |
Citations (4)
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|---|---|---|---|---|
| CN101948684A (en) * | 2010-09-29 | 2011-01-19 | 中联煤层气有限责任公司 | Novel active water fracturing fluid for fracturing of coal bed gas well |
| CN104745172A (en) * | 2015-02-03 | 2015-07-01 | 成都理工大学 | Pulverized coal stabilizer for coal bed gas reservoir and application method thereof |
| CN106085396A (en) * | 2016-07-08 | 2016-11-09 | 金保全 | Oil well online supermolecule abluent, preparation method and on-line cleaning using method |
| CN106281270A (en) * | 2016-07-26 | 2017-01-04 | 中国石油天然气股份有限公司 | A kind of cross-linking water plugging profile control agent of low cost flocculation-type |
-
2019
- 2019-04-30 CN CN201910357216.6A patent/CN110080723A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948684A (en) * | 2010-09-29 | 2011-01-19 | 中联煤层气有限责任公司 | Novel active water fracturing fluid for fracturing of coal bed gas well |
| CN104745172A (en) * | 2015-02-03 | 2015-07-01 | 成都理工大学 | Pulverized coal stabilizer for coal bed gas reservoir and application method thereof |
| CN106085396A (en) * | 2016-07-08 | 2016-11-09 | 金保全 | Oil well online supermolecule abluent, preparation method and on-line cleaning using method |
| CN106281270A (en) * | 2016-07-26 | 2017-01-04 | 中国石油天然气股份有限公司 | A kind of cross-linking water plugging profile control agent of low cost flocculation-type |
Non-Patent Citations (2)
| Title |
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| 姚顺 等: ""聚丙烯酰胺型压裂液的优选与性能评价"", 《煤炭技术》 * |
| 李干佐 等: "《表面活性剂在能源和选矿工业中的应用》", 30 April 2002 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485966A (en) * | 2019-08-11 | 2019-11-22 | 太原理工大学 | A method of it solving coal dust and blocks coal seam fracture |
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Application publication date: 20190802 |