CN111303858A - Quartz sand proppant and preparation method and preparation device thereof - Google Patents
Quartz sand proppant and preparation method and preparation device thereof Download PDFInfo
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- CN111303858A CN111303858A CN202010240231.5A CN202010240231A CN111303858A CN 111303858 A CN111303858 A CN 111303858A CN 202010240231 A CN202010240231 A CN 202010240231A CN 111303858 A CN111303858 A CN 111303858A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 205
- 238000012216 screening Methods 0.000 claims abstract description 87
- 239000000843 powder Substances 0.000 claims abstract description 80
- 239000000428 dust Substances 0.000 claims abstract description 72
- 239000011265 semifinished product Substances 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 39
- 239000012535 impurity Substances 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims description 44
- 238000003860 storage Methods 0.000 claims description 42
- 238000000926 separation method Methods 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000008188 pellet Substances 0.000 claims 3
- 230000008569 process Effects 0.000 abstract description 30
- 239000000047 product Substances 0.000 abstract description 18
- 239000008187 granular material Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005406 washing Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 19
- 230000009471 action Effects 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 ceramsite Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
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- Silicon Compounds (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention provides a quartz sand proppant, a preparation method and a preparation device thereof. The preparation method comprises the steps of drying the quartz sand raw material, removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles, removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles, and carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand propping agents with two different particle sizes. The preparation method provided by the invention does not need water washing in the whole process, and effectively reduces energy consumption. Secondly, adopt hierarchical selection powder machine to realize the elementary classification of big batch semi-manufactured goods to reduce subsequent sieve weight, improve screening efficiency, and through the collision between the granule in the sorting process, thoroughly destroy the quartz sand granule that has the defect of self, become less granule and get rid of, can effectively reduce product turbidity, improve the product concentration.
Description
Technical Field
The invention belongs to the technical field of propping agents, and particularly relates to a quartz sand propping agent, a preparation method of the quartz sand propping agent and a preparation device of the quartz sand propping agent.
Background
The fracturing production increase is an important technology for the production increase of oil and gas wells. The proppant is a key material for fracturing construction. The proppant is carried by the fracturing fluid and supported in the fractures of the fractured stratum, thereby effectively guiding oil and gas to the oil and gas well, greatly improving the oil and gas yield and prolonging the service life of the oil and gas well.
At present, the commonly used fracturing propping agents comprise quartz sand, ceramsite, resin coated particles and the like, wherein the quartz sand is the most basic branch of the propping agent, the demand is always large, and cost reduction and efficiency improvement are particularly important along with the recent decline of international oil prices, so the demand of the quartz sand is further increased. However, the production process is slower to progress, the production efficiency is lower, and particularly, the problems in the fine particle production process are more obvious, for example, the fine particles have poorer passing capacity on the screen and are easy to block the screen holes, so that the replacement frequency of the screen is increased, the production cost is increased, and the requirement on the operation level of a production worker is higher. In addition, the production of the quartz sand for fracturing generally lacks a water source, the traditional method is utilized to consume a large amount of water, meanwhile, the turbidity of the propping agent is not easy to control, and the quality of the propping agent is seriously influenced. Therefore, a new preparation method of the quartz sand proppant is urgently needed to be developed so as to improve the production efficiency, save the water consumption and reduce the production cost. The production of quartz sand for fracturing generally lacks water sources, the traditional method is utilized to consume a large amount of water, meanwhile, the turbidity of the propping agent is not easy to control, and the quality of the propping agent is seriously influenced.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a quartz sand proppant, a preparation method of the quartz sand proppant and a preparation device of the quartz sand proppant.
In a first aspect of the present invention, there is provided a method for preparing a quartz sand proppant, comprising:
drying the quartz sand raw material;
removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles;
removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles;
and carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand propping agents with two different particle sizes.
Optionally, the drying treatment of the quartz sand raw material includes:
and drying the quartz sand raw material by using a three-cylinder dryer, and removing part of dust with a second preset particle size smaller than 0.106mm from the surface of the quartz sand raw material.
Optionally, the large particle impurities with the first preset particle size in the quartz sand raw material after being dried are removed to obtain first semi-finished product particles, including:
and removing large-particle impurities with a first preset particle size larger than 1.18mm in the dried quartz sand raw material by using a linear sieve, and removing part of dust with a second preset particle size smaller than 0.106mm on the surface of the quartz sand raw material to obtain the first semi-finished product particles.
Optionally, the removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles includes:
removing dust with a second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles by using a first-stage powder concentrator;
and removing the dust with the second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles for the second time by adopting a secondary powder concentrator to obtain second semi-finished product particles.
Optionally, the second semi-finished product particles are subjected to at least one sorting and one screening to obtain two kinds of quartz sand proppants with different particle sizes, including:
carrying out primary grading separation on the second semi-finished product particles by adopting a grading powder separator to obtain coarse sand particles and fine sand particles;
and screening the coarse sand grains and the fine sand grains by adopting screening equipment for one time respectively to obtain the quartz sand proppants with two different grain sizes.
In a second aspect of the present invention, a quartz sand proppant is provided, and the specific preparation method is described in the foregoing, and is not described herein again.
In a third aspect of the present invention, there is provided a device for preparing a proppant comprising: the dryer comprises a dryer, a linear screen, a dust removal assembly and a screening assembly, wherein an inlet of the linear screen is connected with an outlet of the dryer, an outlet of the linear screen is connected with an inlet of the dust removal assembly, and an outlet of the dust removal assembly is connected with an inlet of the screening assembly; wherein the content of the first and second substances,
the dryer is used for drying the quartz sand raw material;
the linear sieve is used for removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles;
the dust removal component is used for removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles;
and the screening component is used for carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand proppant with two different particle sizes.
Optionally, the dust removal assembly comprises a first-stage powder concentrator and a second-stage powder concentrator, an outlet of the first-stage powder concentrator is connected with an inlet of the second-stage powder concentrator, and an outlet of the second-stage powder concentrator is connected with an inlet of the screening assembly; and/or the presence of a gas in the gas,
the screening component comprises a grading powder concentrator, a first screening device and a second screening device, an inlet of the grading powder concentrator is connected with an outlet of the second-stage powder concentrator, a first outlet of the grading powder concentrator is connected with an inlet of the first screening device, and a second outlet of the grading powder concentrator is connected with the second screening device.
Optionally, a first temporary storage bin, a second temporary storage bin and a third temporary storage bin are further included, wherein,
the outlet of the first temporary storage bin is connected with the inlet of the linear sieve;
the outlet of the second temporary storage bin is connected with the inlet of the first screening device;
and the inlet of the third temporary storage bin is connected with the second outlet of the grading powder concentrator, and the outlet of the third temporary storage bin is connected with the inlet of the second screening equipment.
Optionally, a plurality of hoists are included, wherein,
the outlet of the dryer is connected with the inlet of the first temporary storage bin through one of the plurality of lifting machines;
the outlet of the linear screen is connected with the inlet of the primary powder concentrator through another lifting machine in the plurality of lifting machines;
the outlet of the first-stage powder concentrator is connected with the inlet of the second-stage powder concentrator through the other one of the plurality of lifting machines;
the outlet of the secondary powder concentrator is connected with the inlet of the grading powder concentrator through the other lifting machine in the plurality of lifting machines;
and the first outlet of the grading powder concentrator is connected with the inlet of the second temporary storage bin through the other lifting machines in the plurality of lifting machines.
According to the preparation method of the quartz sand proppant, the quartz sand raw material is dried, large particle impurities with a first preset particle size in the dried quartz sand raw material are removed to obtain first semi-finished product particles, and meanwhile, a fan in the drying and impurity removal processes is used for promoting particle friction to remove dust on the surfaces of the particles. Further, removing the residual dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles, realizing maximum separation of the dust, and then performing at least one sorting and at least one screening on the second semi-finished product particles to obtain two quartz sand proppants with different particle sizes.
Drawings
FIG. 1 is a schematic flow chart of a method of making a silica sand proppant according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for preparing a quartz sand proppant according to a second embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, in a first aspect of the present invention, there is provided a method for preparing a quartz sand proppant, comprising: drying the quartz sand raw material, removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles, removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles, and then sorting and screening the second semi-finished product particles at least once to obtain two quartz sand proppants with different particle sizes.
According to the preparation method of the quartz sand proppant provided by the embodiment, the quartz sand raw material is dried, and large particle impurities with the first preset particle size after drying treatment are removed to obtain the first semi-finished product particles, so that not only is the moisture and the large particle impurities in the raw material removed, but also the fans in the drying and impurity removing processes can be used for promoting the friction among the particles, so that the dust on the surfaces of the particles is removed. Secondly, the dust with the second residual preset particle size is removed at least twice, so that the maximum separation of the dust is realized. Later, through sorting at least once and once screening second semi-manufactured goods granule, realized the preliminary classification to big batch granule again, reduce follow-up sieve weight, improve screening efficiency, the quartz sand proppant preparation method of this embodiment has realized that whole process does not have the washing, and the energy consumption is low, effectively reduces the product turbidity, improves the concentration degree, and through the collision between the granule at wind-force sorting process, thoroughly destroy the quartz sand granule that self has the defect, become less granule and is detached, effectively improved the intensity of proppant granule.
It should be noted that, in this embodiment, no specific requirement is made on what kind of equipment is used to remove dust and large-particle impurities, and the quartz sand proppant is obtained by screening the quartz sand semi-finished product particles, for example, a fan, a powder concentrator, a linear sieve, or the like may be used to remove the dust and large-particle impurities, and of course, other equipment may be used to remove the dust and large-particle impurities as long as the above-mentioned impurity removal effect can be achieved. In addition, the equipment used in the sorting and screening process is not specifically limited, for example, the high-efficiency powder concentrator, the wind power classifier and the like can be used for realizing primary sorting, the linear sieve, the swing sieve, the rotary vibration sieve, the circular swing sieve, the square swing sieve and the like can be used for realizing secondary screening, and for those skilled in the art, other sorting equipment and other screening equipment can be selected according to actual needs.
Illustratively, as shown in fig. 1, in the first step, the drying process is performed on the quartz sand raw material, and includes: and drying the quartz sand raw material by using a three-cylinder dryer, and removing part of dust with a second preset particle size smaller than 0.106mm from the surface of the quartz sand raw material. Specifically, the three-cylinder drying machine is internally provided with a lifting blade, so that in the falling process of the quartz sand raw material, the lifting action of the lifting blade promotes the friction among the particles so as to rub off the dust on the surfaces of the particles, and meanwhile, the dust generated by the friction is removed by means of the action of the dust removal fan.
It should be noted that, since the dust is a main factor of generating turbidity in the proppant turbidity test, the whole process of preparing the quartz sand proppant in the embodiment does not need water washing, and the dust needs to be removed as much as possible in each step to reduce the product turbidity and realize the anhydrous production of the proppant. For example, in the above steps, the three-cylinder dryer is used to not only dry the quartz sand raw material to remove moisture, but also primarily remove dust to reduce the amount of dust in the subsequent process. Of course, other dryers may be used in the process, and this is not particularly limited.
As shown in fig. 1, in the second step, large particle impurities with a first preset particle size in the dried quartz sand raw material are removed to obtain first semi-finished product particles, which specifically include: and removing large-particle impurities with a first preset particle size larger than 1.18mm in the dried quartz sand raw material by using a linear sieve, and removing part of dust with a second preset particle size smaller than 0.106mm on the surface of the quartz sand raw material to obtain first semi-finished product particles. That is to say, the quartz sand raw material after drying and preliminary dust removal is conveyed to the linear sieve, vibration of a vibration motor of the linear sieve is used as a vibration source, so that quartz sand raw material particles are thrown up on the sieve screen and simultaneously move forwards in a linear manner, oversize products and undersize products with various specifications are generated through the multiple layers of sieve screens and are respectively discharged from respective outlets, therefore, in the process that the particles are continuously thrown up, friction is generated among the particles and between the particles and equipment, dust can be removed through a fan, and in addition, part of dust can be removed through screening.
It should be noted that the large-particle impurities removed by the screening can be backfilled into the pit, and the remaining relatively fine particles continue the next process to achieve energy conservation and emission reduction. In addition, there is no particular limitation on what kind of equipment is used in the step to remove the large-particle impurities of the first predetermined particle size, for example, the above-mentioned linear sieve may be used, and of course, other equipment, for example, a drum sieve, a circular vibrating sieve, a rotary vibrating sieve, etc. may also be used. It is obvious to those skilled in the art that the selection can be made according to actual needs.
Illustratively, as shown in fig. 1, in the third step, optionally, the dust with the second predetermined particle size in the first semi-finished product granule is removed at least twice to obtain a second semi-finished product granule, which includes: and removing the dust with the second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles by adopting a first-stage powder concentrator for the first time, and removing the dust with the second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles by adopting a second-stage powder concentrator for the second time to obtain second semi-finished product particles. Specifically, the first semi-finished product particles subjected to the two impurity removals are conveyed to a primary powder concentrator, strong collisions can be generated between the particles in the primary powder concentrator and between the particles and a blanking disc, the particles are fully dispersed under the action of centrifugal force, and in the falling process, heavier particles are discharged under the action of cross airflow generated by a rotor; lighter dust is further removed by the aid of the action of the fan in the collision process, and the process can realize higher yield due to smaller air volume control. And then, the particles dedusted by the first-stage powder concentrator enter a second-stage powder concentrator for further dedusting, and the dust is removed to the maximum extent based on the same principle.
Further, as shown in fig. 1, in the fourth step, at least one sorting and at least one screening are performed on the second semi-finished product particles to obtain two kinds of quartz sand proppants with different particle sizes, which include: and carrying out primary separation on the second semi-finished product particles by adopting a grading powder separator to obtain coarse sand particles and fine sand particles. And screening the coarse sand grains and the fine sand grains by adopting screening equipment for one time respectively to obtain the quartz sand proppants with two different grain sizes. That is to say, in order to reduce the screening amount in the subsequent screening process and improve the efficiency, the classifying powder concentrator is firstly adopted to primarily separate a large batch of semi-finished products into coarse sand grains with relatively large particle sizes and fine sand grains with relatively small particle sizes, and thus, the screening equipment is utilized to respectively screen the coarse sand grains and the fine sand grains so as to obtain products with different particle sizes.
It should be noted that, in this embodiment, the classifying powder separator is used to perform classifying and classifying on the second semi-finished product particles, for example, with the particle size of 0.212mm as the classification standard, classifying the particles with a particle size larger than 0.212mm into coarse sand particles, and classifying the particle sieves with a particle size smaller than 0.212mm into fine sand particles, so as to implement preliminary classification of the large-particle-size and small-particle-size quartz sand proppants, so as to achieve the purpose of pre-separation and reduce the subsequent sieving amount. Then, the screened coarse sand grains and fine sand grains are screened once by using a screening device, for example, for coarse sand grains, the first screening device can be provided with the screened grain size range of 0.212 mm-0.425 mm according to the requirement, thus, the coarse sand grains are sieved into quartz sand proppant with the grain diameter ranging from 0.212mm to 0.425mm by the first sieving device, for fine sand, the second screening device can also set the screened size range to 0.106mm to 0.212mm as required, thus, the fine sand grains are screened into the quartz sand proppant with the grain diameter ranging from 0.106mm to 0.212mm by the second screening device, namely, the coarse sand grains and the fine sand grains after primary sorting and classification are respectively conveyed to screening devices with different screening sizes, and the coarse sand grains and the fine sand grains are respectively screened by different screening devices to obtain two quartz sand proppants with different grain diameters.
It should be further noted that, dust is inevitably generated in the primary sorting and screening processes, specifically, in the process of dividing the particles into coarse sand particles and fine sand particles by using the primary powder concentrator, dust is generated by friction between the particles, and the dust enters the screening equipment along with the fine particles, so that in order to reduce the turbidity of the product, the dust needs to be removed again in the screening process, and the separation of the dust is realized, thereby realizing the standard of the analysis experiment and the turbidity performance of the screen. Illustratively, the quartz sand proppant produced by the same raw material by using the traditional production method has a breakage rate of 8.76% under a test condition of a closing pressure of 35MPa by using the quartz sand proppant with a particle size specification of 0.212 mm-0.425 mm, and the breakage rate of 8.01% under the same test condition (the particle size specification of 0.212 mm-0.425 mm and the closing pressure of 35MPa) by using the quartz sand proppant produced by the embodiment.
It should be noted that the screened particle size set in the classifying powder concentrator and the screening device is not particularly limited, and those skilled in the art can set the screened particle size to other sizes according to actual needs. In addition, in practical application, the quartz sand proppant needs to be screened and classified on a large scale, and the screening process belongs to an important speed-limiting link of the quartz sand production process, so that the classifying equipment can select a high-efficiency powder concentrator, a wind power classifier and the like to realize primary separation of a large batch of semi-finished product particles, and quartz sand particles with defects are thoroughly destroyed and changed into smaller particles to be removed through collision among the particles in the wind power classifying process. Secondly, the screening device can adopt a linear screen, a square swing screen, a circular swing screen and a rotary vibration screen to screen coarse sand grains or fine sand grains, the screening is not particularly limited, different grading devices and screening devices can be selected according to actual requirements,
the preparation method of the quartz sand proppant disclosed by the invention can realize high removal rate of dust and large-particle impurities in the quartz sand raw material, has high screening efficiency of finished quartz sand proppant products, and has higher screening precision and product strength. In addition, the whole preparation process does not need water washing, only needs to remove a small amount of water carried by the quartz sand raw material in the drying process, greatly reduces the water consumption, has low energy consumption, and can effectively reduce the turbidity of the quartz sand proppant product and improve the product concentration by utilizing the preparation method provided by the invention. In addition, the mutual friction among the particles in a plurality of processes in the whole process is utilized to remove dust on the surfaces of the particles, so that the turbidity reaches the standard, and the continuous collision of the particles improves the strength of the quartz sand proppant and reduces the breakage rate.
In a second aspect of the present invention, a quartz sand proppant is provided, and the specific preparation method is described in the foregoing, and is not described herein again.
In a third aspect of the present invention, as shown in fig. 2, there is provided a quartz sand proppant manufacturing apparatus 100, comprising: the dryer comprises a dryer 110, a linear screen 120, a dust removal assembly 130 and screen assemblies (141, 142 and 143), wherein an inlet of the linear screen 120 is connected with an outlet of the dryer 110, an outlet of the linear screen 120 is connected with an inlet of the dust removal assembly 130, and an outlet of the dust removal assembly 130 is connected with an inlet of the screen assemblies; the dryer 110 is used for drying the quartz sand raw material. And the linear sieve 120 is used for removing large-particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles. And the dust removal component 130 is used for removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles. And the screening component is used for carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand proppants with two different particle sizes.
It should be noted that, in this embodiment, specific types of the dryer, the linear sieve, the dust removing assembly, and the sieving assembly are not particularly limited as long as the above purpose is achieved, for example, the dryer may adopt a three-cylinder dryer, or may use a high-frequency sieve, a drum sieve, or the like in addition to the linear sieve, the dust removing assembly may adopt a powder concentrator, a horizontal wind power classifier, a vertical wind power classifier, or the like, and the sieving device may adopt a linear sieve circular swing sieve, a square swing sieve, a linear sieve, a rotary vibration sieve, or the like, and may be selected according to actual needs. In addition, the connection mode between the components is not particularly limited, for example, the components may be connected by a conveyor or the like to convey the raw material of the quartz sand, and of course, those skilled in the art may select other connection modes, which may be specifically selected according to actual needs.
Illustratively, as shown in FIG. 2, dust removal assembly 130 includes a primary powder concentrator 131 and a secondary powder concentrator 132, with the outlet of primary powder concentrator 131 being connected to the inlet of secondary powder concentrator 132 and the outlet of secondary powder concentrator 132 being connected to the inlet of the screen assembly. The screening components comprise a classifying powder concentrator 141, a first screening device 142 and a second screening device 143, wherein an inlet of the classifying powder concentrator 141 is connected with an outlet of the second-stage powder concentrator 132, a first outlet of the classifying powder concentrator 141 is connected with an inlet of the first screening device 142, and a second outlet of the classifying powder concentrator 141 is connected with the second screening device 143.
Further, the present embodiment further includes a first temporary storage bin 151, a second temporary storage bin 152, and a third temporary storage bin 153, wherein an outlet of the first temporary storage bin 151 is connected to an inlet of the linear sieve 120, an outlet of the second temporary storage bin 152 is connected to an inlet of the first sieving device 142, an inlet of the third temporary storage bin 153 is connected to a second outlet of the classifying powder concentrator 141, and an outlet of the third temporary storage bin 153 is connected to an inlet of the second sieving device 143. That is to say, the first screening device 142 is further correspondingly connected with a second temporary storage bin 152, and the second screening device 143 is correspondingly connected with a third temporary storage bin 153, so that corresponding coarse sand particles and fine sand particles can be respectively stored in the second temporary storage bin 152 and the third temporary storage bin 153, and the second temporary storage bin 152 and the third temporary storage bin 153 are used for controlling the entering amount of the quartz sand proppant semi-finished product particles into the first screening device 142 and the second screening device 143, so that the obtained quartz sand proppant product is more uniform, the product turbidity is effectively reduced, and the product concentration is improved.
It should be understood that the present embodiment, in addition to the particle removal assembly, the sorting screen, the dryer, the screening assembly, and the temporary storage bin, may further include a connection member connecting the above components. Illustratively, as shown in fig. 2, the hoisting machine further comprises a plurality of hoisting machines, wherein the plurality of hoisting machines comprise a first hoisting machine 161, a second hoisting machine 162, a third hoisting machine 163, a fourth hoisting machine 164 and a fifth hoisting machine 165. Thus, the conveying of the quartz sand proppant among various parts is realized by the hoister.
It should be noted that, each lifting machine in this embodiment adopts a fighter lifting machine, belongs to one kind of conveyer, and mainly used vertical lift material, it is high to promote the height, the conveying capacity is big and operate steadily. Of course, a belt conveyor, a screw conveyor, a mesh belt conveyor, a chain conveyor, etc. may be used according to actual needs, and are not particularly limited.
In summary, as shown in fig. 2, the specific connection relationship among the components in the apparatus for preparing a quartz sand proppant in this embodiment is as follows: an outlet of the dryer 110 is connected with an inlet of the linear sieve 120 through a first elevator 161 and a first temporary storage bin 151, an outlet of the linear sieve 120 is connected with an inlet of the first-stage powder concentrator 131 through a second elevator 162, an outlet of the first-stage powder concentrator 131 is connected with an inlet of the second-stage powder concentrator 132 through a third elevator 163, an outlet of the second-stage powder concentrator 132 is connected with an inlet of the classifying powder concentrator 141 through a fourth elevator 164, a first outlet of the classifying powder concentrator 141 is connected with an inlet of the first screening device 142 through a fifth elevator 165 and a second temporary storage bin 152, a second outlet of the classifying powder concentrator 141 is connected with an inlet of the third temporary storage bin 153, and an outlet of the third temporary storage bin 153 is connected with an inlet of the second screening device 143. Of course, the outlets of the first and second screening devices may also be connected to a conveyor to transport the proppant to a predetermined location.
Based on the connection relationship among the above components, the specific process of preparing the quartz sand proppant by using the above device in this embodiment is as follows, please refer to fig. 2, firstly, the drying machine 110 is used to dry the quartz sand raw material, and remove the dust on the surface of the particles, then the dried raw material is conveyed to the first temporary storage bin 151 through the first hoisting machine 161, the entering amount of the raw material particles into the linear sieve 120 is controlled through the first temporary storage bin 151, then the large particle impurities and the dust on the surface of the particles in the raw material are removed by the linear sieve 120, so as to obtain the first semi-finished product particles, which are conveyed to the first-stage powder concentrator 131 through the second hoisting machine 162, and conveyed to the second-stage powder concentrator 132 through the third hoisting machine 163 after the dust is removed for the first time, and conveyed to the classifying powder concentrator 141 through the fourth hoisting machine 164 after the dust is removed for the second time, and the once classification is performed on, the coarse sand particles are divided into coarse sand particles and fine sand particles according to the preset particle size, the classifying and powder selecting machine 141 conveys the coarse sand particles to the second temporary storage bin 152 through the fifth lifting machine 165 through the first outlet, the entering amount of the coarse sand particles entering the first screening device 142 is controlled through the second temporary storage bin 152, and therefore the coarse sand particles entering the first screening device 142 are screened again to obtain the quartz sand proppant with the first particle size. Further, the classifying and powder selecting machine 141 is conveyed to the third temporary storage bin 153 through the second outlet, and the third temporary storage bin 153 can also control the entering amount of the fine sand particles entering the second screening device 143, so that the fine sand particles entering the second screening device 143 are screened again to obtain the quartz sand proppant with the second particle size. The specific processes of primary sorting and primary screening are described in the foregoing, and will not be described herein again.
The invention provides a quartz sand proppant, a preparation method of the quartz sand proppant and a preparation device of the quartz sand proppant, and has the following beneficial effects compared with the prior art: firstly, the whole process does not need washing, and a dryer is utilized to remove a small amount of water carried by the quartz sand raw material, thereby effectively reducing the subsequent energy consumption and realizing the anhydrous production of the propping agent. And secondly, the classifying powder concentrator can realize the primary classification of a large batch of semi-finished products so as to reduce the subsequent screening amount, thereby improving the efficiency, and thoroughly destroying the quartz sand particles with defects in the classifying process through the collision among the particles to become smaller particles to be removed. And thirdly, removing dust on the surfaces of the particles by utilizing mutual friction among the particles in multiple processes in the whole process, so that the turbidity reaches the standard, and the particles continuously collide to improve the strength of the quartz sand proppant and reduce the crushing rate. The preparation method can be used for obtaining two quartz sand proppants with different particle sizes, and the obtained quartz sand proppants can effectively reduce the turbidity of products, improve the concentration of the products, improve the quality of the products, improve the production efficiency and reduce the production cost.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A preparation method of a quartz sand proppant is characterized by comprising the following steps:
drying the quartz sand raw material;
removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles;
removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles;
and carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand propping agents with two different particle sizes.
2. The method of claim 1, wherein the drying the quartz sand raw material comprises:
and drying the quartz sand raw material by using a three-cylinder dryer, and removing part of dust with a second preset particle size smaller than 0.106mm from the surface of the quartz sand raw material.
3. The method according to claim 1, wherein the removing of large particle impurities with a first preset particle size from the dried raw quartz sand material to obtain a first semi-finished product particle comprises:
and removing large-particle impurities with a first preset particle size larger than 1.18mm in the dried quartz sand raw material by using a linear sieve, and removing part of dust with a second preset particle size smaller than 0.106mm on the surface of the quartz sand raw material to obtain the first semi-finished product particles.
4. The method according to any one of claims 1 to 3, wherein the at least two times of removing the dust of the second predetermined particle size from the first semi-finished pellets to obtain second semi-finished pellets comprises:
removing dust with a second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles by using a first-stage powder concentrator;
and removing the dust with the second preset particle size smaller than 0.106mm on the surface of the first semi-finished product particles for the second time by adopting a secondary powder concentrator to obtain second semi-finished product particles.
5. The method according to any one of claims 1-3, wherein said at least one sorting and at least one sieving of said second semi-finished pellets results in two different particle sizes of said quartz sand proppant comprising:
carrying out primary grading separation on the second semi-finished product particles by adopting a grading powder separator to obtain coarse sand particles and fine sand particles;
and screening the coarse sand grains and the fine sand grains by adopting screening equipment for one time respectively to obtain the quartz sand proppants with two different grain sizes.
6. A silica sand proppant formed by the method of any one of claims 1-5.
7. A preparation facilities of quartz sand proppant, its characterized in that includes: the dryer comprises a dryer, a linear screen, a dust removal assembly and a screening assembly, wherein an inlet of the linear screen is connected with an outlet of the dryer, an outlet of the linear screen is connected with an inlet of the dust removal assembly, and an outlet of the dust removal assembly is connected with an inlet of the screening assembly; wherein the content of the first and second substances,
the dryer is used for drying the quartz sand raw material;
the linear sieve is used for removing large particle impurities with a first preset particle size in the dried quartz sand raw material to obtain first semi-finished product particles;
the dust removal component is used for removing dust with a second preset particle size in the first semi-finished product particles at least twice to obtain second semi-finished product particles;
and the screening component is used for carrying out at least one sorting and at least one screening on the second semi-finished product particles to obtain the quartz sand proppant with two different particle sizes.
8. The device as claimed in claim 7, wherein the dust removal assembly comprises a primary powder concentrator and a secondary powder concentrator, an outlet of the primary powder concentrator is connected with an inlet of the secondary powder concentrator, and an outlet of the secondary powder concentrator is connected with an inlet of the screening assembly; and/or the presence of a gas in the gas,
the screening component comprises a grading powder concentrator, a first screening device and a second screening device, an inlet of the grading powder concentrator is connected with an outlet of the second-stage powder concentrator, a first outlet of the grading powder concentrator is connected with an inlet of the first screening device, and a second outlet of the grading powder concentrator is connected with the second screening device.
9. The apparatus of claim 8, further comprising a first temporary storage bin, a second temporary storage bin, and a third temporary storage bin, wherein,
the outlet of the first temporary storage bin is connected with the inlet of the linear sieve;
the outlet of the second temporary storage bin is connected with the inlet of the first screening device;
and the inlet of the third temporary storage bin is connected with the second outlet of the grading powder concentrator, and the outlet of the third temporary storage bin is connected with the inlet of the second screening equipment.
10. The apparatus of claim 9, further comprising a plurality of hoists, wherein,
the outlet of the dryer is connected with the inlet of the first temporary storage bin through one of the plurality of lifting machines;
the outlet of the linear screen is connected with the inlet of the primary powder concentrator through another lifting machine in the plurality of lifting machines;
the outlet of the first-stage powder concentrator is connected with the inlet of the second-stage powder concentrator through the other one of the plurality of lifting machines;
the outlet of the secondary powder concentrator is connected with the inlet of the grading powder concentrator through the other lifting machine in the plurality of lifting machines;
and the first outlet of the grading powder concentrator is connected with the inlet of the second temporary storage bin through the other lifting machines in the plurality of lifting machines.
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Denomination of invention: A quartz sand proppant and its preparation method and device Granted publication date: 20220920 Pledgee: China Construction Bank Corporation Beijing Huamao Sub-branch Pledgor: BEIJING KUNLUN LONGYUAN OIL EXPLOITATION TECHNOLOGY CO.,LTD. Registration number: Y2024980016780 |
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